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Merge pull request #74 from matrixik/master

Clean and fix docs markdown
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astaxie 2013-06-21 01:59:53 -07:00
commit 20e101a42d
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[![Build Status](https://drone.io/github.com/astaxie/beego/status.png)](https://drone.io/github.com/astaxie/beego/latest) [![Build Status](https://drone.io/github.com/astaxie/beego/status.png)](https://drone.io/github.com/astaxie/beego/latest)
beego is a Go Framework which is inspired from tornado and sinatra. beego is a Go Framework which is inspired from tornado and sinatra.
It is a simply & powerful web framework. It is a simply & powerful web framework.
@ -24,12 +24,13 @@ Have this features:
[中文文档](https://github.com/astaxie/beego/tree/master/docs/zh) [中文文档](https://github.com/astaxie/beego/tree/master/docs/zh)
## LICENSE ## LICENSE
beego is licensed under the Apache Licence, Version 2.0 beego is licensed under the Apache Licence, Version 2.0
(http://www.apache.org/licenses/LICENSE-2.0.html). (http://www.apache.org/licenses/LICENSE-2.0.html).
## Use Case ## Use Case
- API documentation [gowalker](https://github.com/Unknwon/gowalker) - API documentation [gowalker](https://github.com/Unknwon/gowalker)
- CMS [toropress](https://github.com/insionng/toropress) - CMS [toropress](https://github.com/insionng/toropress)

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##What is hot update? ## What is hot update?
If you have used nginx, you may know that nginx supports hot update, which means you can update your nginx without stopping and restarting it. It serves old connections with old version, and accepts new connections with new version. Notice that hot compiling is different from hot update, where hot compiling is monitoring your source files and recompile them when the content changes, it requires stop and restart your applications, `bee start` is a tool for hot compiling. If you have used nginx, you may know that nginx supports hot update, which means you can update your nginx without stopping and restarting it. It serves old connections with old version, and accepts new connections with new version. Notice that hot compiling is different from hot update, where hot compiling is monitoring your source files and recompile them when the content changes, it requires stop and restart your applications, `bee start` is a tool for hot compiling.
##Is hot update necessary?
## Is hot update necessary?
Some people says that hot update is not as useful as its cool name. In my opinion, this is absolutely necessary because zero-down server is our goal for our services. Even though sometimes some errors or hardware problems may occur, but it belongs to design of high availability, don't mix them up. Service update is a known issue, so we need to fix this problem. Some people says that hot update is not as useful as its cool name. In my opinion, this is absolutely necessary because zero-down server is our goal for our services. Even though sometimes some errors or hardware problems may occur, but it belongs to design of high availability, don't mix them up. Service update is a known issue, so we need to fix this problem.
##How Beego support hot update?
## How Beego support hot update?
The basic principle of hot update: main process fork a process, and child process execute corresponding programs. So what happens? We know that after forked a process, main process will have all handles, data and stack, etc, but all handles are saved in `CloseOnExec`, so all copied handles will be closed when you execute it unless you clarify this, and we need child process to reuse the handle of `net.Listener`. Once a process calls exec functions, it is "dead", system replaces it with new code. The only thing it left is the process ID, which is the same number but it is a new program after executed. The basic principle of hot update: main process fork a process, and child process execute corresponding programs. So what happens? We know that after forked a process, main process will have all handles, data and stack, etc, but all handles are saved in `CloseOnExec`, so all copied handles will be closed when you execute it unless you clarify this, and we need child process to reuse the handle of `net.Listener`. Once a process calls exec functions, it is "dead", system replaces it with new code. The only thing it left is the process ID, which is the same number but it is a new program after executed.
Therefore, the first thing we need to do is that let child process fork main process and through `os.StartProcess` to append files that contains handle that is going to be inherited. Therefore, the first thing we need to do is that let child process fork main process and through `os.StartProcess` to append files that contains handle that is going to be inherited.
@ -15,7 +20,8 @@ The final step is that we want to serve old connections with old version of appl
Above are three problems that we need to solve, you can see my code logic for specific implementation. Above are three problems that we need to solve, you can see my code logic for specific implementation.
##Show time
## Show time
1. Write code in your Get method: 1. Write code in your Get method:
@ -26,15 +32,15 @@ Above are three problems that we need to solve, you can see my code logic for sp
} }
2. Open two terminals: 2. Open two terminals:
One execute: ` ps -ef|grep <application name>` One execute: ` ps -ef|grep <application name>`
Another one execute`curl "http://127.0.0.1:8080/?sleep=20"` Another one execute `curl "http://127.0.0.1:8080/?sleep=20"`
3. Hot update 3. Hot update
`kill -HUP <PID>` `kill -HUP <PID>`
4. Open a terminal to request connection: `curl "http://127.0.0.1:8080/?sleep=0"`
As you will see, the first request will wait for 20 seconds, but it's served by old process; after hot update, the first request will print old process ID, but the second request will print new process ID. 4. Open a terminal to request connection: `curl "http://127.0.0.1:8080/?sleep=0"`
As you will see, the first request will wait for 20 seconds, but it's served by old process; after hot update, the first request will print old process ID, but the second request will print new process ID.

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#Installation # Installation
Beego is a simple web framework, but it uses many third-party packages, so you have to install all dependency packages also. Beego is a simple web framework, but it uses many third-party packages, so you have to install all dependency packages also.
- Before anything you do, you have to check that you installed Go in your computer, see more detail about Go installation in my book: [Chapter 1](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/01.1.md) - Before anything you do, you have to check that you installed Go in your computer, see more detail about Go installation in my book: [Chapter 1](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/01.1.md)
- Use `go get ` to install Beego: - Use `go get ` to install Beego:
go get github.com/astaxie/beego go get github.com/astaxie/beego
- Install bee tools for fast-develop Beego applications:
go get github.com/astaxie/bee - Install bee tools for fast-develop Beego applications:
Good job, you're ready to Beego with powerful bee tools! go get github.com/astaxie/bee
Good job, you're ready to Beego with powerful bee tools!
![](images/bee.png) ![](images/bee.png)
Beego has following dependency packages: Beego has following dependency packages:
- Session module: [github.com/astaxie/beego/session](github.com/astaxie/beego/session) - Session module: [github.com/astaxie/beego/session](https://github.com/astaxie/beego/session)
- To support redis engine: [github.com/garyburd/redigo/redis](github.com/garyburd/redigo/redis) - To support redis engine: [github.com/garyburd/redigo/redis](https://github.com/garyburd/redigo/redis)
- To support mysql engine: [github.com/go-sql-driver/mysql](github.com/go-sql-driver/mysql) - To support mysql engine: [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
- To support markdown as template function: [github.com/russross/blackfriday](github.com/russross/blackfriday) - To support markdown as template function: [github.com/russross/blackfriday](https://github.com/russross/blackfriday)
- [Introduction](README.md) - [Introduction](README.md)
- [Quick start](Quickstart.md) - [Quick start](Quickstart.md)

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# Quick start # Quick start
Hey, you say you've never heard about Beego and don't know how to use it? Don't worry, after you read this section, you will know a lot about Beego. Before you start reading, make sure you installed Beego in your computer, if not, check this tutorial: [Installation](Install.md) Hey, you say you've never heard about Beego and don't know how to use it? Don't worry, after you read this section, you will know a lot about Beego. Before you start reading, make sure you installed Beego in your computer, if not, check this tutorial: [Installation](Install.md)
**Navigation** **Navigation**
@ -23,11 +24,13 @@ Hey, you say you've never heard about Beego and don't know how to use it? Don't
- [Integrated third-party applications](#integrated-third-party-applications) - [Integrated third-party applications](#integrated-third-party-applications)
- [Deployment](#deployment) - [Deployment](#deployment)
## Hello world ## Hello world
This is an example of "Hello world" in Beego: This is an example of "Hello world" in Beego:
package main package main
import ( import (
"github.com/astaxie/beego" "github.com/astaxie/beego"
) )
@ -54,18 +57,25 @@ Open address [http://127.0.0.1:8080](http://127.0.0.1:8080) in your browser and
What happened in behind above example? What happened in behind above example?
1. We import package `github.com/astaxie/beego`. As we know that Go initialize packages and runs init() function in every package(more detail [here](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/02.3.md#main-function-and-init-function)), so Beego initializes the BeeApp application at this time. 1. We import package `github.com/astaxie/beego`. As we know that Go initialize packages and runs init() function in every package ([more details](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/02.3.md#main-function-and-init-function)), so Beego initializes the BeeApp application at this time.
2. Define controller. We define a struct called `MainController` with a anonymous field `beego.Controller`, so the `MainController` has all methods that `beego.Controller` has. 2. Define controller. We define a struct called `MainController` with a anonymous field `beego.Controller`, so the `MainController` has all methods that `beego.Controller` has.
3. Define RESTful methods. Once we use anonymous combination, `MainController` has already had `Get`, `Post`, `Delete`, `Put` and other methods, these methods will be called when user sends corresponding request, like `Post` method for requests that are using POST method. Therefore, after we overloaded `Get` method in `MainController`, all GET requests will use `Get` method in `MainController` instead of in `beego.Controller`. 3. Define RESTful methods. Once we use anonymous combination, `MainController` has already had `Get`, `Post`, `Delete`, `Put` and other methods, these methods will be called when user sends corresponding request, like `Post` method for requests that are using POST method. Therefore, after we overloaded `Get` method in `MainController`, all GET requests will use `Get` method in `MainController` instead of in `beego.Controller`.
4. Define main function. All applications in Go use main function as entry point as C does. 4. Define main function. All applications in Go use main function as entry point as C does.
5. Register routers, it tells Beego which controller is responsibility for specific requests. Here we register `/` for `MainController`, so all requests in `/` will be handed to `MainController`. Be aware that the first argument is the path and the second one is pointer of controller that you want to register. 5. Register routers, it tells Beego which controller is responsibility for specific requests. Here we register `/` for `MainController`, so all requests in `/` will be handed to `MainController`. Be aware that the first argument is the path and the second one is pointer of controller that you want to register.
6. Run application in port 8080 as default, press `Ctrl+c` to exit. 6. Run application in port 8080 as default, press `Ctrl+c` to exit.
## New project ## New project
Get into your $GOPATH, then use following command to setup Beego project: Get into your $GOPATH, then use following command to setup Beego project:
bee create hello bee create hello
It generates folders and files for your project, directory structure as follows: It generates folders and files for your project, directory structure as follows:
. .
@ -82,7 +92,9 @@ It generates folders and files for your project, directory structure as follows:
└── views └── views
└── index.tpl └── index.tpl
## Development mode ## Development mode
Beego uses development mode as default, you can use following code to change mode in your application: Beego uses development mode as default, you can use following code to change mode in your application:
beego.RunMode = "pro" beego.RunMode = "pro"
@ -95,7 +107,7 @@ No differences between two ways.
In development mode, you have following effects: In development mode, you have following effects:
- If you don't have directory `views`, it prints following error prompt: - If you don't have directory `views`, it prints following error prompt:
2013/04/13 19:36:17 [W] [stat views: no such file or directory] 2013/04/13 19:36:17 [W] [stat views: no such file or directory]
@ -104,7 +116,9 @@ In development mode, you have following effects:
![](images/dev.png) ![](images/dev.png)
## Router ## Router
The main function of router is to connect request URL and handler. Beego wrapped `Controller`, so it connects request URL and `ControllerInterface`. The `ControllerInterface` has following methods: The main function of router is to connect request URL and handler. Beego wrapped `Controller`, so it connects request URL and `ControllerInterface`. The `ControllerInterface` has following methods:
type ControllerInterface interface { type ControllerInterface interface {
@ -132,39 +146,41 @@ Users can use following ways to register route rules:
For more convenient configure route rules, Beego references the idea from sinatra, so it supports more kinds of route rules as follows: For more convenient configure route rules, Beego references the idea from sinatra, so it supports more kinds of route rules as follows:
- beego.Router("/api/:id([0-9]+)", &controllers.RController{}) - beego.Router("/api/:id([0-9]+)", &controllers.RController{})
Customized regular expression match // match /api/123 :id= 123 Customized regular expression match // match /api/123 :id= 123
- beego.Router("/news/:all", &controllers.RController{})
- beego.Router("/news/:all", &controllers.RController{})
Match rest of all // match /news/path/to/123.html :all= path/to/123.html Match rest of all // match /news/path/to/123.html :all= path/to/123.html
- beego.Router("/user/:username([\w]+)", &controllers.RController{}) - beego.Router("/user/:username([\w]+)", &controllers.RController{})
Regular expression // match /user/astaxie :username = astaxie Regular expression // match /user/astaxie :username = astaxie
- beego.Router("/download/`*`.`*`", &controllers.RController{}) - beego.Router("/download/`*`.`*`", &controllers.RController{})
Wildcard character // match /download/file/api.xml :path= file/api :ext=xml Wildcard character // match /download/file/api.xml :path= file/api :ext=xml
- beego.Router("/download/ceshi/`*`", &controllers.RController{}) - beego.Router("/download/ceshi/`*`", &controllers.RController{})
wildcard character match rest of all // match /download/ceshi/file/api.json :splat=file/api.json wildcard character match rest of all // match /download/ceshi/file/api.json :splat=file/api.json
- beego.Router("/:id:int", &controllers.RController{}) - beego.Router("/:id:int", &controllers.RController{})
Match type int // match :id is int type, Beego uses regular expression ([0-9]+) automatically Match type int // match :id is int type, Beego uses regular expression ([0-9]+) automatically
- beego.Router("/:hi:string", &controllers.RController{}) - beego.Router("/:hi:string", &controllers.RController{})
Match type string // match :hi is string type, Beego uses regular expression ([\w]+) automatically Match type string // match :hi is string type, Beego uses regular expression ([\w]+) automatically
##Static files
## Static files
Go provides `http.ServeFile` for static files, Beego wrapped this function and use following way to register static file folder: Go provides `http.ServeFile` for static files, Beego wrapped this function and use following way to register static file folder:
beego.SetStaticPath("/static","public") beego.SetStaticPath("/static","public")
- The first argument is the path of your URL. - The first argument is the path of your URL.
- The second argument is the directory in your application path. - The second argument is the directory in your application path.
@ -176,37 +192,41 @@ Beego supports multiple static file directories as follows:
After you setting static directory, when users visit `/images/login/login.png`Beego accesses `images/login/login.png` in related to your application directory. One more example, if users visit `/static/img/logo.png`, Beego accesses file `public/img/logo.png`. After you setting static directory, when users visit `/images/login/login.png`Beego accesses `images/login/login.png` in related to your application directory. One more example, if users visit `/static/img/logo.png`, Beego accesses file `public/img/logo.png`.
##Filter and middleware
## Filter and middleware
Beego supports customized filter and middleware, such as security verification, force redirect, etc. Beego supports customized filter and middleware, such as security verification, force redirect, etc.
Here is an example of verify user name of all requests, check if it's admin. Here is an example of verify user name of all requests, check if it's admin.
var FilterUser = func(w http.ResponseWriter, r *http.Request) { var FilterUser = func(w http.ResponseWriter, r *http.Request) {
if r.URL.User == nil || r.URL.User.Username() != "admin" { if r.URL.User == nil || r.URL.User.Username() != "admin" {
http.Error(w, "", http.StatusUnauthorized) http.Error(w, "", http.StatusUnauthorized)
} }
} }
beego.Filter(FilterUser)
beego.Filter(FilterUser)
You can also filter by arguments: You can also filter by arguments:
beego.Router("/:id([0-9]+)", &admin.EditController{}) beego.Router("/:id([0-9]+)", &admin.EditController{})
beego.FilterParam("id", func(rw http.ResponseWriter, r *http.Request) { beego.FilterParam("id", func(rw http.ResponseWriter, r *http.Request) {
dosomething() dosomething()
}) })
Filter by prefix is also available: Filter by prefix is also available:
beego.FilterPrefixPath("/admin", func(rw http.ResponseWriter, r *http.Request) { beego.FilterPrefixPath("/admin", func(rw http.ResponseWriter, r *http.Request) {
dosomething() dosomething()
}) })
##Controller
## Controller
Use `beego.controller` as anonymous in your controller struct to implement the interface in Beego: Use `beego.controller` as anonymous in your controller struct to implement the interface in Beego:
type xxxController struct { type xxxController struct {
beego.Controller beego.Controller
} }
`beego.Controller` implemented`beego.ControllerInterface`, `beego.ControllerInterface` defined following methods: `beego.Controller` implemented`beego.ControllerInterface`, `beego.ControllerInterface` defined following methods:
@ -214,15 +234,15 @@ Use `beego.controller` as anonymous in your controller struct to implement the i
- Init(ct `*`Context, cn string) - Init(ct `*`Context, cn string)
Initialize context, controller's name, template's name, and container of template arguments Initialize context, controller's name, template's name, and container of template arguments
- Prepare() - Prepare()
This is for expend usages, it executes before all the following methods. Users can overload this method for verification for example. This is for expend usages, it executes before all the following methods. Users can overload this method for verification for example.
- Get() - Get()
This method executes when client sends request as GET method, 403 as default status code. Users overload this method for customized handle process of GET method. This method executes when client sends request as GET method, 403 as default status code. Users overload this method for customized handle process of GET method.
- Post() - Post()
This method executes when client sends request as POST method, 403 as default status code. Users overload this method for customized handle process of POST method. This method executes when client sends request as POST method, 403 as default status code. Users overload this method for customized handle process of POST method.
@ -258,7 +278,7 @@ Use `beego.controller` as anonymous in your controller struct to implement the i
Overload all methods for all customized logic processes, let's see an example: Overload all methods for all customized logic processes, let's see an example:
type AddController struct { type AddController struct {
beego.Controller beego.Controller
} }
func (this *AddController) Prepare() { func (this *AddController) Prepare() {
@ -266,54 +286,64 @@ Overload all methods for all customized logic processes, let's see an example:
} }
func (this *AddController) Get() { func (this *AddController) Get() {
this.Data["content"] ="value" this.Data["content"] = "value"
this.Layout = "admin/layout.html" this.Layout = "admin/layout.html"
this.TplNames = "admin/add.tpl" this.TplNames = "admin/add.tpl"
} }
func (this *AddController) Post() { func (this *AddController) Post() {
pkgname := this.GetString("pkgname") pkgname := this.GetString("pkgname")
content := this.GetString("content") content := this.GetString("content")
pk := models.GetCruPkg(pkgname) pk := models.GetCruPkg(pkgname)
if pk.Id == 0 { if pk.Id == 0 {
var pp models.PkgEntity var pp models.PkgEntity
pp.Pid = 0 pp.Pid = 0
pp.Pathname = pkgname pp.Pathname = pkgname
pp.Intro = pkgname pp.Intro = pkgname
models.InsertPkg(pp) models.InsertPkg(pp)
pk = models.GetCruPkg(pkgname) pk = models.GetCruPkg(pkgname)
} }
var at models.Article var at models.Article
at.Pkgid = pk.Id at.Pkgid = pk.Id
at.Content = content at.Content = content
models.InsertArticle(at) models.InsertArticle(at)
this.Ctx.Redirect(302, "/admin/index") this.Ctx.Redirect(302, "/admin/index")
} }
## Template
### Template directory
##Template
###Template directory
Beego uses `views` as the default directory for template files, parses and caches them as needed(cache is not enable in develop mode), but you can **change**(because only one directory can be used for template files) its directory using following code: Beego uses `views` as the default directory for template files, parses and caches them as needed(cache is not enable in develop mode), but you can **change**(because only one directory can be used for template files) its directory using following code:
beego.ViewsPath = "/myviewpath" beego.ViewsPath = "/myviewpath"
###Auto-render
### Auto-render
You don't need to call render function manually, Beego calls it automatically after corresponding methods executed. If your application is somehow doesn't need templates, you can disable this feature either in code of `main.go` or configuration file. You don't need to call render function manually, Beego calls it automatically after corresponding methods executed. If your application is somehow doesn't need templates, you can disable this feature either in code of `main.go` or configuration file.
To disable auto-render in configuration file: To disable auto-render in configuration file:
autorender = false autorender = false
To disable auto-render in `main.go`(before you call `beego.Run()` to run the application): To disable auto-render in `main.go`(before you call `beego.Run()` to run the application):
beego.AutoRender = false beego.AutoRender = false
###Template data
### Template data
You can use `this.Data` in controller methods to access the data in templates. Suppose you want to get content of `{{.Content}}`, you can use following code to do this: You can use `this.Data` in controller methods to access the data in templates. Suppose you want to get content of `{{.Content}}`, you can use following code to do this:
this.Data["Context"] = "value" this.Data["Context"] = "value"
###Template name
Beego uses built-in template engine of Go, so there is no different in syntax. As for how to write template file, please visit [Template tutorial](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/07.4.md)。 ### Template name
Beego uses built-in template engine of Go, so there is no different in syntax. As for how to write template file, please visit [Template tutorial](https://github.com/Unknwon/build-web-application-with-golang_EN/blob/master/eBook/07.4.md).
Beego parses template files in `viewpath` and render it after you set the name of the template file in controller methods. For example, Beego finds the file `add.tpl` in directory `admin` in following code: Beego parses template files in `viewpath` and render it after you set the name of the template file in controller methods. For example, Beego finds the file `add.tpl` in directory `admin` in following code:
@ -329,16 +359,18 @@ If you enabled auto-render and you don't tell Beego which template file you are
Which is `<corresponding controller name>/<request method name>.<template extension>`. For example, your controller name is `AddController` and the request method is POST, and the default file extension is `tpl`, so Beego will try to find file `/<viewpath>/AddController/POST.tpl`. Which is `<corresponding controller name>/<request method name>.<template extension>`. For example, your controller name is `AddController` and the request method is POST, and the default file extension is `tpl`, so Beego will try to find file `/<viewpath>/AddController/POST.tpl`.
###Layout design
### Layout design
Beego supports layout design, which means if you are working on an administration application, and some part of its user interface is exactly same all the time, then you can make this part as a layout. Beego supports layout design, which means if you are working on an administration application, and some part of its user interface is exactly same all the time, then you can make this part as a layout.
this.Layout = "admin/layout.html" this.Layout = "admin/layout.html"
this.TplNames = "admin/add.tpl" this.TplNames = "admin/add.tpl"
You have to set following variable in order to make Beego possible to insert your dynamic content: You have to set following variable in order to make Beego possible to insert your dynamic content:
{{.LayoutContent}} {{.LayoutContent}}
Beego parses template file and assign content to `LayoutContent`, and render them together. Beego parses template file and assign content to `LayoutContent`, and render them together.
Right now, Beego caches all template files, so you can use following way to implement another kind of layout: Right now, Beego caches all template files, so you can use following way to implement another kind of layout:
@ -347,12 +379,14 @@ Right now, Beego caches all template files, so you can use following way to impl
Handle logic Handle logic
{{template "footer.html"}} {{template "footer.html"}}
###Template function
### Template function
Beego supports customized template functions that are registered before you call `beego.Run()`. Beego supports customized template functions that are registered before you call `beego.Run()`.
func hello(in string)(out string){ func hello(in string)(out string){
out = in + "world" out = in + "world"
return return
} }
beego.AddFuncMap("hi",hello) beego.AddFuncMap("hi",hello)
@ -363,35 +397,45 @@ Then you can use this function in your template files:
There are some built-in template functions: There are some built-in template functions:
* markdown * markdown
This function converts markdown content to HTML format, use {{markdown .Content}} in template files. This function converts markdown content to HTML format, use {{markdown .Content}} in template files.
* dateformat
* dateformat
This function converts time to formatted string, use {{dateformat .Time "2006-01-02T15:04:05Z07:00"}} in template files. This function converts time to formatted string, use {{dateformat .Time "2006-01-02T15:04:05Z07:00"}} in template files.
* date
* date
This function implements date function like in PHP, use formatted string to get corresponding time, use {{date .T "Y-m-d H:i:s"}} in template files. This function implements date function like in PHP, use formatted string to get corresponding time, use {{date .T "Y-m-d H:i:s"}} in template files.
* compare
* compare
This functions compares two objects, returns true if they are same, false otherwise, use {{compare .A .B}} in template files. This functions compares two objects, returns true if they are same, false otherwise, use {{compare .A .B}} in template files.
* substr
* substr
This function cuts out string from another string by index, it supports UTF-8 characters, use {{substr .Str 0 30}} in template files. This function cuts out string from another string by index, it supports UTF-8 characters, use {{substr .Str 0 30}} in template files.
* html2str
* html2str
This function escapes HTML to raw string, use {{html2str .Htmlinfo}} in template files. This function escapes HTML to raw string, use {{html2str .Htmlinfo}} in template files.
* str2html
* str2html
This function outputs string in HTML format without escaping, use {{str2html .Strhtml}} in template files. This function outputs string in HTML format without escaping, use {{str2html .Strhtml}} in template files.
* htmlquote
* htmlquote
This functions implements basic HTML escape, use {{htmlquote .quote}} in template files. This functions implements basic HTML escape, use {{htmlquote .quote}} in template files.
* htmlunquote
* htmlunquote
This functions implements basic invert-escape of HTML, use {{htmlunquote .unquote}} in template files. This functions implements basic invert-escape of HTML, use {{htmlunquote .unquote}} in template files.
##Handle request
## Handle request
We always need to get data from users, including methods like GET, POST, etc. Beego parses these data automatically, and you can access them by following code: We always need to get data from users, including methods like GET, POST, etc. Beego parses these data automatically, and you can access them by following code:
- GetString(key string) string - GetString(key string) string
@ -413,18 +457,20 @@ If you need other types that are not included above, like you need int64 instead
func (this *MainController) Post() { func (this *MainController) Post() {
id := this.Input().Get("id") id := this.Input().Get("id")
intid, err := strconv.Atoi(id) intid, err := strconv.Atoi(id)
} }
To use `this.Ctx.Request` for more information about request, and object properties and method please read [Request](http://golang.org/pkg/net/http/#Request) To use `this.Ctx.Request` for more information about request, and object properties and method please read [Request](http://golang.org/pkg/net/http/#Request)
###File upload
### File upload
It's very easy to upload file through Beego, but don't forget to add `enctype="multipart/form-data"` in your form, otherwise the browser will not upload anything. It's very easy to upload file through Beego, but don't forget to add `enctype="multipart/form-data"` in your form, otherwise the browser will not upload anything.
Files will be saved in memory, if the size is greater than cache memory, the rest part will be saved as temporary file. The default cache memory is 64 MB, and you can using following ways to change this size. Files will be saved in memory, if the size is greater than cache memory, the rest part will be saved as temporary file. The default cache memory is 64 MB, and you can use following ways to change this size.
In code: In code:
beego.MaxMemory = 1<<22 beego.MaxMemory = 1<<22
In configuration file: In configuration file:
@ -435,56 +481,60 @@ Beego provides two convenient functions to upload files:
- GetFile(key string) (multipart.File, `*`multipart.FileHeader, error) - GetFile(key string) (multipart.File, `*`multipart.FileHeader, error)
This function is mainly used to read file name element `the_file` in form and returns corresponding information. You can use this information either filter or save files. This function is mainly used to read file name element `the_file` in form and returns corresponding information. You can use this information either filter or save files.
- SaveToFile(fromfile, tofile string) error - SaveToFile(fromfile, tofile string) error
This function a wrapper of GetFile and gives ability to save file. This function a wrapper of GetFile and gives ability to save file.
This is an example to save file that is uploaded: This is an example to save file that is uploaded:
func (this *MainController) Post() { func (this *MainController) Post() {
this.SaveToFile("the_file","/var/www/uploads/uploaded_file.txt"") this.SaveToFile("the_file","/var/www/uploads/uploaded_file.txt"")
} }
###Output Json and XML
### Output Json and XML
Beego considered API function design at the beginning, and we often use Json or XML format data as output. Therefore, it's no reason that Beego doesn't support it: Beego considered API function design at the beginning, and we often use Json or XML format data as output. Therefore, it's no reason that Beego doesn't support it:
Set `content-type` to `application/json` for output raw Json format data: Set `content-type` to `application/json` for output raw Json format data:
func (this *AddController) Get() { func (this *AddController) Get() {
mystruct := { ... } mystruct := { ... }
this.Data["json"] = &mystruct this.Data["json"] = &mystruct
this.ServeJson() this.ServeJson()
} }
Set `content-type` to `application/xml` for output raw XML format data: Set `content-type` to `application/xml` for output raw XML format data:
func (this *AddController) Get() { func (this *AddController) Get() {
mystruct := { ... } mystruct := { ... }
this.Data["xml"]=&mystruct this.Data["xml"]=&mystruct
this.ServeXml() this.ServeXml()
} }
##Redirect and error
## Redirect and error
You can use following to redirect: You can use following to redirect:
func (this *AddController) Get() { func (this *AddController) Get() {
this.Redirect("/", 302) this.Redirect("/", 302)
} }
You can also throw an exception in your controller as follows: You can also throw an exception in your controller as follows:
func (this *MainController) Get() { func (this *MainController) Get() {
this.Abort("401") this.Abort("401")
v := this.GetSession("asta") v := this.GetSession("asta")
if v == nil { if v == nil {
this.SetSession("asta", int(1)) this.SetSession("asta", int(1))
this.Data["Email"] = 0 this.Data["Email"] = 0
} else { } else {
this.SetSession("asta", v.(int)+1) this.SetSession("asta", v.(int)+1)
this.Data["Email"] = v.(int) this.Data["Email"] = v.(int)
} }
this.TplNames = "index.tpl" this.TplNames = "index.tpl"
} }
Then Beego will not execute rest code of the function body when you call `this.Abort("401")`, and gives following default page view to users: Then Beego will not execute rest code of the function body when you call `this.Abort("401")`, and gives following default page view to users:
@ -493,56 +543,60 @@ Then Beego will not execute rest code of the function body when you call `this.A
Beego supports following error code: 404, 401, 403, 500 and 503, you can customize your error handle, for example, use following code to replace 404 error handle process: Beego supports following error code: 404, 401, 403, 500 and 503, you can customize your error handle, for example, use following code to replace 404 error handle process:
func page_not_found(rw http.ResponseWriter, r *http.Request){ func page_not_found(rw http.ResponseWriter, r *http.Request) {
t,_:= template.New("beegoerrortemp").ParseFiles(beego.ViewsPath+"/404.html") t, _ := template.New("beegoerrortemp").ParseFiles(beego.ViewsPath + "/404.html")
data :=make(map[string]interface{}) data := make(map[string]interface{})
data["content"] = "page not found" data["content"] = "page not found"
t.Execute(rw, data) t.Execute(rw, data)
} }
func main() { func main() {
beego.Errorhandler("404",page_not_found) beego.Errorhandler("404", page_not_found)
beego.Router("/", &controllers.MainController{}) beego.Router("/", &controllers.MainController{})
beego.Run() beego.Run()
} }
You may be able to use your own `404.html` for your 404 error. You may be able to use your own `404.html` for your 404 error.
Beego also gives you ability to modify error message that shows on the error page, the following example shows how to set more meaningful error message when database has problems: Beego also gives you ability to modify error message that shows on the error page, the following example shows how to set more meaningful error message when database has problems:
func dbError(rw http.ResponseWriter, r *http.Request){ func dbError(rw http.ResponseWriter, r *http.Request) {
t,_:= template.New("beegoerrortemp").ParseFiles(beego.ViewsPath+"/dberror.html") t, _ := template.New("beegoerrortemp").ParseFiles(beego.ViewsPath + "/dberror.html")
data :=make(map[string]interface{}) data := make(map[string]interface{})
data["content"] = "database is now down" data["content"] = "database is now down"
t.Execute(rw, data) t.Execute(rw, data)
} }
func main() { func main() {
beego.Errorhandler("dbError",dbError) beego.Errorhandler("dbError", dbError)
beego.Router("/", &controllers.MainController{}) beego.Router("/", &controllers.MainController{})
beego.Run() beego.Run()
} }
After you registered this customized error, you can use `this.Abort("dbError")` for any database error in your applications. After you registered this customized error, you can use `this.Abort("dbError")` for any database error in your applications.
##Handle response
## Handle response
There are some situations that you may have in response: There are some situations that you may have in response:
1. Output template 1. Output template
I've already talked about template above, Beego outputs template after corresponding method executed. I've already talked about template above, Beego outputs template after corresponding method executed.
2. Redirect 2. Redirect
You can use this.Redirect("/", 302) to redirect page. You can use this.Redirect("/", 302) to redirect page.
3. Output string 3. Output string
Sometimes we just need to print string on the screen: Sometimes we just need to print string on the screen:
this.Ctx.WriteString("ok") this.Ctx.WriteString("ok")
## Sessions ## Sessions
Beego has a built-in session module and supports four engines, including memory, file, MySQL and redis. You can implement your own engine based on the interface. Beego has a built-in session module and supports four engines, including memory, file, MySQL and redis. You can implement your own engine based on the interface.
It's easy to use session in Beego, use following code in your main() function: It's easy to use session in Beego, use following code in your main() function:
@ -594,21 +648,21 @@ There are some arguments you can use in session module:
- SessionOn - SessionOn
Whether enable session or not, default is false, corresponding arguments in configuration file: sessionon. Whether enable session or not, default is false, corresponding arguments in configuration file: sessionon.
- SessionProvider - SessionProvider
Setting session engine, default is memory, other options are file, MySQL and redis, corresponding arguments in configuration file: sessionprovider. Setting session engine, default is memory, other options are file, MySQL and redis, corresponding arguments in configuration file: sessionprovider.
- SessionName - SessionName
Setting name of cookies, it saves in users' browser with name beegosessionID, corresponding arguments in configuration file: sessionname. Setting name of cookies, it saves in users' browser with name beegosessionID, corresponding arguments in configuration file: sessionname.
- SessionGCMaxLifetime - SessionGCMaxLifetime
Setting session expired time, default is 3600 seconds, corresponding arguments in configuration: sessiongcmaxlifetime Setting session expired time, default is 3600 seconds, corresponding arguments in configuration: sessiongcmaxlifetime
- SessionSavePath - SessionSavePath
Setting save path or link address of corresponding file, MySQL and redis engines, default is empty, corresponding arguments in configuration file: sessionsavepath Setting save path or link address of corresponding file, MySQL and redis engines, default is empty, corresponding arguments in configuration file: sessionsavepath
When the SessionProvider is file, SessionSavePath saves file path: When the SessionProvider is file, SessionSavePath saves file path:
@ -620,13 +674,15 @@ When the SessionProvider is mysql, SessionSavePath is link address, it uses driv
beego.SessionProvider = "mysql" beego.SessionProvider = "mysql"
beego.SessionSavePath = "username:password@protocol(address)/dbname?param=value" beego.SessionSavePath = "username:password@protocol(address)/dbname?param=value"
When the SessionProvider is redis, SessionSavePath is link address of redis, it uses driver [redigo](https://github.com/garyburd/redigo): When the SessionProvider is redis, SessionSavePath is link address of redis, it uses driver [redigo](https://github.com/garyburd/redigo):
beego.SessionProvider = "redis" beego.SessionProvider = "redis"
beego.SessionSavePath = "127.0.0.1:6379" beego.SessionSavePath = "127.0.0.1:6379"
## Cache ## Cache
Beego has a built-in cache module, it's like memcache, which caches data in memory. Here is an example of using cache module in Beego: Beego has a built-in cache module, it's like memcache, which caches data in memory. Here is an example of using cache module in Beego:
var ( var (
@ -638,7 +694,7 @@ Beego has a built-in cache module, it's like memcache, which caches data in memo
urllist.Every = 0 // Not expired urllist.Every = 0 // Not expired
urllist.Start() urllist.Start()
} }
func (this *ShortController) Post() { func (this *ShortController) Post() {
var result ShortResult var result ShortResult
longurl := this.Input().Get("longurl") longurl := this.Input().Get("longurl")
@ -661,8 +717,8 @@ Beego has a built-in cache module, it's like memcache, which caches data in memo
} }
this.Data["json"] = result this.Data["json"] = result
this.ServeJson() this.ServeJson()
} }
To use cache, you need to initialize a `beego.NewBeeCache` object and set expired time, and enable expired check. Then you can use following methods to achieve other operations: To use cache, you need to initialize a `beego.NewBeeCache` object and set expired time, and enable expired check. Then you can use following methods to achieve other operations:
- Get(name string) interface{} - Get(name string) interface{}
@ -670,7 +726,9 @@ To use cache, you need to initialize a `beego.NewBeeCache` object and set expire
- Delete(name string) (ok bool, err error) - Delete(name string) (ok bool, err error)
- IsExist(name string) bool - IsExist(name string) bool
##Safe map
## Safe map
We know that map is not thread safe in Go, if you don't know it, this article may be helpful for you: [atomic_maps](http://golang.org/doc/faq#atomic_maps). However, we need a kind of thread safe map in practice, especially when we are using goroutines. Therefore, Beego provides a simple built-in thread safe map implementation. We know that map is not thread safe in Go, if you don't know it, this article may be helpful for you: [atomic_maps](http://golang.org/doc/faq#atomic_maps). However, we need a kind of thread safe map in practice, especially when we are using goroutines. Therefore, Beego provides a simple built-in thread safe map implementation.
bm := NewBeeMap() bm := NewBeeMap()
@ -680,16 +738,16 @@ We know that map is not thread safe in Go, if you don't know it, this article ma
if !bm.Check("astaxie") { if !bm.Check("astaxie") {
t.Error("check err") t.Error("check err")
} }
if v := bm.Get("astaxie"); v.(int) != 1 { if v := bm.Get("astaxie"); v.(int) != 1 {
t.Error("get err") t.Error("get err")
} }
bm.Delete("astaxie") bm.Delete("astaxie")
if bm.Check("astaxie") { if bm.Check("astaxie") {
t.Error("delete err") t.Error("delete err")
} }
This map has following interfaces: This map has following interfaces:
- Get(k interface{}) interface{} - Get(k interface{}) interface{}
@ -697,7 +755,9 @@ This map has following interfaces:
- Check(k interface{}) bool - Check(k interface{}) bool
- Delete(k interface{}) - Delete(k interface{})
##Log
## Log
Beego has a default BeeLogger object that outputs log into stdout, and you can use your own logger as well: Beego has a default BeeLogger object that outputs log into stdout, and you can use your own logger as well:
beego.SetLogger(*log.Logger) beego.SetLogger(*log.Logger)
@ -706,13 +766,14 @@ You can output everything that implemented `*log.Logger`, for example, write to
fd,err := os.OpenFile("/var/log/beeapp/beeapp.log", os.O_RDWR|os.O_APPEND, 0644) fd,err := os.OpenFile("/var/log/beeapp/beeapp.log", os.O_RDWR|os.O_APPEND, 0644)
if err != nil { if err != nil {
beego.Critical("openfile beeapp.log:", err) beego.Critical("openfile beeapp.log:", err)
return return
} }
lg := log.New(fd, "", log.Ldate|log.Ltime) lg := log.New(fd, "", log.Ldate|log.Ltime)
beego.SetLogger(lg) beego.SetLogger(lg)
###Different levels of log
### Different levels of log
* Trace(v ...interface{}) * Trace(v ...interface{})
* Debug(v ...interface{}) * Debug(v ...interface{})
@ -724,43 +785,55 @@ You can output everything that implemented `*log.Logger`, for example, write to
You can use following code to set log level: You can use following code to set log level:
beego.SetLevel(beego.LevelError) beego.SetLevel(beego.LevelError)
Your project may have a lot of log outputs, but you don't want to output everything after your application is running on the internet, for example, you want to ignore Trace, Debug and Info level log outputs, you can use following setting: Your project may have a lot of log outputs, but you don't want to output everything after your application is running on the internet, for example, you want to ignore Trace, Debug and Info level log outputs, you can use following setting:
beego.SetLevel(beego.LevelWarning) beego.SetLevel(beego.LevelWarning)
Then Beego will not output log that has lower level of LevelWarning. Here is the list of all log levels, order from lower to higher: Then Beego will not output log that has lower level of LevelWarning. Here is the list of all log levels, order from lower to higher:
LevelTrace、LevelDebug、LevelInfo、LevelWarning、 LevelError、LevelCritical LevelTrace, LevelDebug, LevelInfo, LevelWarning, LevelError, LevelCritical
You can use different log level to output different error messages, it's based on how critical the error you think it is: You can use different log level to output different error messages, it's based on how critical the error you think it is:
### Examples of log messages ### Examples of log messages
- Trace - Trace
* "Entered parse function validation block" * "Entered parse function validation block"
* "Validation: entered second 'if'" * "Validation: entered second 'if'"
* "Dictionary 'Dict' is empty. Using default value" * "Dictionary 'Dict' is empty. Using default value"
- Debug - Debug
* "Web page requested: http://somesite.com Params='...'" * "Web page requested: http://somesite.com Params='...'"
* "Response generated. Response size: 10000. Sending." * "Response generated. Response size: 10000. Sending."
* "New file received. Type:PNG Size:20000" * "New file received. Type:PNG Size:20000"
- Info - Info
* "Web server restarted" * "Web server restarted"
* "Hourly statistics: Requested pages: 12345 Errors: 123 ..." * "Hourly statistics: Requested pages: 12345 Errors: 123 ..."
* "Service paused. Waiting for 'resume' call" * "Service paused. Waiting for 'resume' call"
- Warn - Warn
* "Cache corrupted for file='test.file'. Reading from back-end" * "Cache corrupted for file='test.file'. Reading from back-end"
* "Database 192.168.0.7/DB not responding. Using backup 192.168.0.8/DB" * "Database 192.168.0.7/DB not responding. Using backup 192.168.0.8/DB"
* "No response from statistics server. Statistics not sent" * "No response from statistics server. Statistics not sent"
- Error - Error
* "Internal error. Cannot process request #12345 Error:...." * "Internal error. Cannot process request #12345 Error:...."
* "Cannot perform login: credentials DB not responding" * "Cannot perform login: credentials DB not responding"
- Critical - Critical
* "Critical panic received: .... Shutting down" * "Critical panic received: .... Shutting down"
* "Fatal error: ... App is shutting down to prevent data corruption or loss" * "Fatal error: ... App is shutting down to prevent data corruption or loss"
### Example ### Example
func internalCalculationFunc(x, y int) (result int, err error) { func internalCalculationFunc(x, y int) (result int, err error) {
@ -782,26 +855,26 @@ You can use different log level to output different error messages, it's based o
} }
retVal := z-3 retVal := z-3
beego.Debug("Returning ", retVal) beego.Debug("Returning ", retVal)
return retVal, nil return retVal, nil
} }
func processInput(input inputData) { func processInput(input inputData) {
defer func() { defer func() {
if r := recover(); r != nil { if r := recover(); r != nil {
beego.Error("Unexpected error occurred: ", r) beego.Error("Unexpected error occurred: ", r)
outputs <- outputData{result : 0, error : true} outputs <- outputData{result : 0, error : true}
} }
}() }()
beego.Info("Received input signal. x:",input.x," y:", input.y) beego.Info("Received input signal. x:",input.x," y:", input.y)
res, err := internalCalculationFunc(input.x, input.y) res, err := internalCalculationFunc(input.x, input.y)
if err != nil { if err != nil {
beego.Warn("Error in calculation:", err.Error()) beego.Warn("Error in calculation:", err.Error())
} }
beego.Info("Returning result: ",res," error: ",err) beego.Info("Returning result: ",res," error: ",err)
outputs <- outputData{result : res, error : err != nil} outputs <- outputData{result : res, error : err != nil}
} }
func main() { func main() {
@ -827,7 +900,9 @@ You can use different log level to output different error messages, it's based o
} }
} }
##Configuration
## Configuration
Beego supports to parse .ini file in path `conf/app.conf`, and you have following options: Beego supports to parse .ini file in path `conf/app.conf`, and you have following options:
appname = beepkg appname = beepkg
@ -837,7 +912,7 @@ Beego supports to parse .ini file in path `conf/app.conf`, and you have followin
autorender = false autorender = false
autorecover = false autorecover = false
viewspath = "myview" viewspath = "myview"
If you set value in configuration file, Beego uses it to replace default value. If you set value in configuration file, Beego uses it to replace default value.
You can also have other values for your application, for example, database connection information: You can also have other values for your application, for example, database connection information:
@ -846,7 +921,7 @@ You can also have other values for your application, for example, database conne
mysqlpass = "rootpass" mysqlpass = "rootpass"
mysqlurls = "127.0.0.1" mysqlurls = "127.0.0.1"
mysqldb = "beego" mysqldb = "beego"
Then use following code to load your settings: Then use following code to load your settings:
beego.AppConfig.String("mysqluser") beego.AppConfig.String("mysqluser")
@ -862,33 +937,35 @@ AppConfig supports following methods:
- Float(key string) (float64, error) - Float(key string) (float64, error)
- String(key string) string - String(key string) string
##Beego arguments
## Beego arguments
Beego has many configurable arguments, let me introduce to you all of them, so you can use them for more usage in your application: Beego has many configurable arguments, let me introduce to you all of them, so you can use them for more usage in your application:
* BeeApp * BeeApp
Entry point of Beego, it initialized in init() function when you import Beego package. Entry point of Beego, it initialized in init() function when you import Beego package.
* AppConfig * AppConfig
It stores values from file `conf/app.conf` and initialized in init() function. It stores values from file `conf/app.conf` and initialized in init() function.
* HttpAddr * HttpAddr
Application listening address, default is empty for listening all IP. Application listening address, default is empty for listening all IP.
* HttpPort * HttpPort
Application listening port, default is 8080. Application listening port, default is 8080.
* AppName * AppName
Application name, default is "beego". Application name, default is "beego".
* RunMode * RunMode
Application mode, default is "dev" develop mode and gives friendly error messages. Application mode, default is "dev" develop mode and gives friendly error messages.
* AutoRender * AutoRender
This value indicates whether auto-render or not, default is true, you should set to false for API usage applications. This value indicates whether auto-render or not, default is true, you should set to false for API usage applications.
@ -905,37 +982,37 @@ Beego has many configurable arguments, let me introduce to you all of them, so y
/debug/pprof/cmdline /debug/pprof/cmdline
/debug/pprof/profile /debug/pprof/profile
/debug/pprof/symbol /debug/pprof/symbol
For more information about pprof, please read [pprof](http://golang.org/pkg/net/http/pprof/) For more information about pprof, please read [pprof](http://golang.org/pkg/net/http/pprof/)
* ViewsPath * ViewsPath
Template path, default is "views". Template path, default is "views".
* SessionOn * SessionOn
This value indicate whether enable session or not, default is false. This value indicate whether enable session or not, default is false.
* SessionProvider * SessionProvider
Session engine, default is memory. Session engine, default is memory.
* SessionName * SessionName
Name for cookie that save in client browser, default is "beegosessionID". Name for cookie that save in client browser, default is "beegosessionID".
* SessionGCMaxLifetime * SessionGCMaxLifetime
Session expired time, default is 3600 seconds. Session expired time, default is 3600 seconds.
* SessionSavePath * SessionSavePath
Save path of session, default is empty. Save path of session, default is empty.
* UseFcgi * UseFcgi
This value indicates whether enable fastcgi or not, default is false. This value indicates whether enable fastcgi or not, default is false.
* MaxMemory * MaxMemory
Maximum memory size for file upload, default is `1 << 26`(64M). Maximum memory size for file upload, default is `1 << 26`(64M).
@ -944,11 +1021,13 @@ Beego has many configurable arguments, let me introduce to you all of them, so y
This value indicate whether enable gzip or not, default is false. This value indicate whether enable gzip or not, default is false.
##Integrated third-party applications
## Integrated third-party applications
Beego supports to integrate third-party application, you can customized `http.Handler` as follows: Beego supports to integrate third-party application, you can customized `http.Handler` as follows:
beego.RouterHandler("/chat/:info(.*)", sockjshandler) beego.RouterHandler("/chat/:info(.*)", sockjshandler)
sockjshandler implemented interface `http.Handler`. sockjshandler implemented interface `http.Handler`.
Beego has an example for supporting chat of sockjs, here is the code: Beego has an example for supporting chat of sockjs, here is the code:
@ -967,7 +1046,7 @@ Beego has an example for supporting chat of sockjs, here is the code:
func chatHandler(s sockjs.Session) { func chatHandler(s sockjs.Session) {
users.Add(s) users.Add(s)
defer users.Remove(s) defer users.Remove(s)
for { for {
m := s.Receive() m := s.Receive()
if m == nil { if m == nil {
@ -998,7 +1077,9 @@ Beego has an example for supporting chat of sockjs, here is the code:
The above example implemented a simple chat room for sockjs, and you can use `http.Handler` for more extensions. The above example implemented a simple chat room for sockjs, and you can use `http.Handler` for more extensions.
##Deployment
## Deployment
Go compiles program to binary file, you only need to copy this binary to your server and run it. Because Beego uses MVC model, so you may have folders for static files, configuration files and template files, so you have to copy those files as well. Here is a real example for deployment. Go compiles program to binary file, you only need to copy this binary to your server and run it. Because Beego uses MVC model, so you may have folders for static files, configuration files and template files, so you have to copy those files as well. Here is a real example for deployment.
$ mkdir /opt/app/beepkg $ mkdir /opt/app/beepkg
@ -1006,7 +1087,7 @@ Go compiles program to binary file, you only need to copy this binary to your se
$ cp -fr views /opt/app/beepkg $ cp -fr views /opt/app/beepkg
$ cp -fr static /opt/app/beepkg $ cp -fr static /opt/app/beepkg
$ cp -fr conf /opt/app/beepkg $ cp -fr conf /opt/app/beepkg
Here is the directory structure pf `/opt/app/beepkg`. Here is the directory structure pf `/opt/app/beepkg`.
. .
@ -1018,12 +1099,12 @@ Here is the directory structure pf `/opt/app/beepkg`.
│ └── js │ └── js
└── views └── views
└── index.tpl └── index.tpl
├── beepkg ├── beepkg
Now you can run your application in server, here are two good ways to manage your applications, and I recommend the first one. Now you can run your application in server, here are two good ways to manage your applications, and I recommend the first one.
- Supervisord - Supervisord
More information: [Supervisord](Supervisord.md) More information: [Supervisord](Supervisord.md)
- nohup - nohup
@ -1031,4 +1112,4 @@ Now you can run your application in server, here are two good ways to manage you
nohup ./beepkg & nohup ./beepkg &
- [Introduction](README.md) - [Introduction](README.md)
- [Step by step](Tutorial.md) - [Step by step](Tutorial.md)

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@ -1,4 +1,5 @@
#Beego # Beego
Beego is a lightweight, open source, non-blocking and scalable web framework for the Go programming language. It's like tornado in Python. This web framework has already been using for building web server and tools in SNDA's CDN system. Documentation and downloads available at [http://astaxie.github.com/beego](http://astaxie.github.com/beego) Beego is a lightweight, open source, non-blocking and scalable web framework for the Go programming language. It's like tornado in Python. This web framework has already been using for building web server and tools in SNDA's CDN system. Documentation and downloads available at [http://astaxie.github.com/beego](http://astaxie.github.com/beego)
It has following main features: It has following main features:
@ -19,29 +20,33 @@ The working principles of Beego as follows:
Beego is licensed under the Apache Licence, Version 2.0 Beego is licensed under the Apache Licence, Version 2.0
(http://www.apache.org/licenses/LICENSE-2.0.html). (http://www.apache.org/licenses/LICENSE-2.0.html).
#Simple example
# Simple example
The following example prints string "Hello world" to your browser, it shows how easy to build a web application with Beego. The following example prints string "Hello world" to your browser, it shows how easy to build a web application with Beego.
package main package main
import ( import (
"github.com/astaxie/beego" "github.com/astaxie/beego"
) )
type MainController struct { type MainController struct {
beego.Controller beego.Controller
} }
func (this *MainController) Get() { func (this *MainController) Get() {
this.Ctx.WriteString("hello world") this.Ctx.WriteString("hello world")
} }
func main() { func main() {
beego.Router("/", &MainController{}) beego.Router("/", &MainController{})
beego.Run() beego.Run()
} }
#Handbook
# Handbook
- [Purposes](Why.md) - [Purposes](Why.md)
- [Installation](Install.md) - [Installation](Install.md)
- [Quick start](Quickstart.md) - [Quick start](Quickstart.md)
@ -49,5 +54,7 @@ The following example prints string "Hello world" to your browser, it shows how
- [Real world usage](Application.md) - [Real world usage](Application.md)
- [Hot update](HotUpdate.md) - [Hot update](HotUpdate.md)
#Documentation
[Go Walker](http://gowalker.org/github.com/astaxie/beego) # Documentation
[Go Walker](http://gowalker.org/github.com/astaxie/beego)

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@ -1,22 +1,22 @@
##supervisord ## supervisord
1. Installation 1. Installation
wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg
sh setuptools-0.6c11-py2.7.egg sh setuptools-0.6c11-py2.7.egg
easy_install supervisor easy_install supervisor
echo_supervisord_conf >/etc/supervisord.conf echo_supervisord_conf >/etc/supervisord.conf
mkdir /etc/supervisord.conf.d mkdir /etc/supervisord.conf.d
2. Configure /etc/supervisord.conf 2. Configure /etc/supervisord.conf
[include] [include]
files = /etc/supervisord.conf.d/*.conf files = /etc/supervisord.conf.d/*.conf
3. Add new application 3. Add new application
cd /etc/supervisord.conf.d cd /etc/supervisord.conf.d
@ -31,4 +31,4 @@
startsecs = 5 startsecs = 5
user = root user = root
redirect_stderr = true redirect_stderr = true
stdout_logfile = /var/log/supervisord/beepkg.log stdout_logfile = /var/log/supervisord/beepkg.log

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@ -1,13 +1,19 @@
# 一步一步跟我写博客 # 一步一步跟我写博客
## 创建项目 ## 创建项目
## 数据库结构设计 ## 数据库结构设计
## 控制器设计 ## 控制器设计
## 模板设计 ## 模板设计
## 用户登陆退出 ## 用户登陆退出
## 数据库操作
## 数据库操作

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@ -1,4 +1,5 @@
# Design purposes and ideas # Design purposes and ideas
People may ask me why I want to build a new web framework rather than use other good ones. I know there are many excellent web frameworks on the internet and almost all of them are open source, and I have my reasons to do this. People may ask me why I want to build a new web framework rather than use other good ones. I know there are many excellent web frameworks on the internet and almost all of them are open source, and I have my reasons to do this.
Remember when I was writing the book about how to build web applications with Go, I just wanted to tell people what were my valuable experiences with Go in web development, especially I have been working with PHP and Python for almost ten years. At first, I didn't realize that a small web framework can give great help to web developers when they are learning to build web applications in a new programming language, and it also helps people more by studying its source code. Finally, I decided to write a open source web framework called Beego as supporting materiel for my book. Remember when I was writing the book about how to build web applications with Go, I just wanted to tell people what were my valuable experiences with Go in web development, especially I have been working with PHP and Python for almost ten years. At first, I didn't realize that a small web framework can give great help to web developers when they are learning to build web applications in a new programming language, and it also helps people more by studying its source code. Finally, I decided to write a open source web framework called Beego as supporting materiel for my book.
@ -9,11 +10,11 @@ I used to use CI in PHP and tornado in Python, there are both lightweight, so th
2. Learn more about languages by studying their source code, it's not hard to read and understand them because they are both lightweight frameworks. 2. Learn more about languages by studying their source code, it's not hard to read and understand them because they are both lightweight frameworks.
3. It's quite easy to make secondary development of these frameworks for specific purposes. 3. It's quite easy to make secondary development of these frameworks for specific purposes.
Those reasons are my original intention of implementing Beego, and used two chapters in my book to introduce and design this lightweight web framework in GO. Those reasons are my original intention of implementing Beego, and used two chapters in my book to introduce and design this lightweight web framework in Go.
Then I started to design logic execution of Beego. Because Go and Python have somewhat similar, I referenced some ideas from tornado to design Beego. As you can see, there is no different between Beego and tornado in RESTful processing; they both use GET, POST or some other methods to implement RESTful. I took some ideas from [https://github.com/drone/routes](https://github.com/drone/routes) at the beginning of designing routes. It uses regular expression in route rules processing, which is an excellent idea that to make up for the default Mux router function in Go. However, I have to design my own interface in order to implement RESTful and use inherited ideas in Python. Then I started to design logic execution of Beego. Because Go and Python have somewhat similar, I referenced some ideas from tornado to design Beego. As you can see, there is no different between Beego and tornado in RESTful processing; they both use GET, POST or some other methods to implement RESTful. I took some ideas from [https://github.com/drone/routes](https://github.com/drone/routes) at the beginning of designing routes. It uses regular expression in route rules processing, which is an excellent idea that to make up for the default Mux router function in Go. However, I have to design my own interface in order to implement RESTful and use inherited ideas in Python.
The controller is the most important part of whole MVC model, and Beego uses the interface and ideas I said above for the controller. Although I haven't decided to have to design the model part, everyone is welcome to implement data management by referencing Beedb, my another open source project. I simply adopt Go built-in template engine for the view part, but add more commonly used functions as template functions. This is how a simple web framework looks like, but I'll keep working on form processing, session handling, log recording, configuration, automated operation, etc, to build a simple but complete web framework. The controller is the most important part of whole MVC model, and Beego uses the interface and ideas I said above for the controller. Although I haven't decided to have to design the model part, everyone is welcome to implement data management by referencing Beedb, my another open source project. I simply adopt Go built-in template engine for the view part, but add more commonly used functions as template functions. This is how a simple web framework looks like, but I'll keep working on form processing, session handling, log recording, configuration, automated operation, etc, to build a simple but complete web framework.
- [Introduction](README.md) - [Introduction](README.md)
- [Installation](Install.md) - [Installation](Install.md)

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@ -2,10 +2,12 @@
热升级是什么呢了解nginx的同学都知道nginx是支持热升级的可以用老进程服务先前链接的链接使用新进程服务新的链接即在不停止服务的情况下完成系统的升级与运行参数修改。那么热升级和热编译是不同的概念热编译是通过监控文件的变化重新编译然后重启进程例如bee start就是这样的工具 热升级是什么呢了解nginx的同学都知道nginx是支持热升级的可以用老进程服务先前链接的链接使用新进程服务新的链接即在不停止服务的情况下完成系统的升级与运行参数修改。那么热升级和热编译是不同的概念热编译是通过监控文件的变化重新编译然后重启进程例如bee start就是这样的工具
## 热升级有必要吗? ## 热升级有必要吗?
很多人认为HTTP的应用有必要支持热升级吗那么我可以很负责的说非常有必要不中断服务始终是我们所追求的目标虽然很多人说可能服务器会坏掉等等这个是属于高可用的设计范畴不要搞混了这个是可预知的问题所以我们需要避免这样的升级带来的用户不可用。你还在为以前升级搞到凌晨升级而烦恼嘛那么现在就赶紧拥抱热升级吧。 很多人认为HTTP的应用有必要支持热升级吗那么我可以很负责的说非常有必要不中断服务始终是我们所追求的目标虽然很多人说可能服务器会坏掉等等这个是属于高可用的设计范畴不要搞混了这个是可预知的问题所以我们需要避免这样的升级带来的用户不可用。你还在为以前升级搞到凌晨升级而烦恼嘛那么现在就赶紧拥抱热升级吧。
## beego如何支持热升级 ## beego如何支持热升级
热升级的原理基本上就是主进程fork一个进程然后子进程exec相应的程序。那么这个过程中发生了什么呢我们知道进程fork之后会把主进程的所有句柄、数据和堆栈继承过来、但是里面所有的句柄存在一个叫做CloseOnExec也就是执行exec的时候copy的所有的句柄都被关闭了除非特别申明而我们期望的是子进程能够复用主进程的net.Listener的句柄。一个进程一旦调用exec类函数它本身就"死亡"了,系统把代码段替换成新的程序的代码,废弃原有的数据段和堆栈段,并为新程序分配新的数据段与堆栈段,唯一留下的,就是进程号,也就是说,对系统而言,还是同一个进程,不过已经是另一个程序了。 热升级的原理基本上就是主进程fork一个进程然后子进程exec相应的程序。那么这个过程中发生了什么呢我们知道进程fork之后会把主进程的所有句柄、数据和堆栈继承过来、但是里面所有的句柄存在一个叫做CloseOnExec也就是执行exec的时候copy的所有的句柄都被关闭了除非特别申明而我们期望的是子进程能够复用主进程的net.Listener的句柄。一个进程一旦调用exec类函数它本身就"死亡"了,系统把代码段替换成新的程序的代码,废弃原有的数据段和堆栈段,并为新程序分配新的数据段与堆栈段,唯一留下的,就是进程号,也就是说,对系统而言,还是同一个进程,不过已经是另一个程序了。
@ -17,6 +19,7 @@
上面是我们需要解决的三个方面的问题,具体的实现大家可以看我实现的代码逻辑。 上面是我们需要解决的三个方面的问题,具体的实现大家可以看我实现的代码逻辑。
## 如何演示热升级 ## 如何演示热升级
1. 编写代码在beego应用的控制器中Get方法实现大概如下 1. 编写代码在beego应用的控制器中Get方法实现大概如下
@ -28,15 +31,15 @@
} }
2. 打开两个终端 2. 打开两个终端
一个终端输入:` ps -ef|grep 应用名` 一个终端输入:` ps -ef|grep 应用名`
一个终端输入请求:`curl "http://127.0.0.1:8080/?sleep=20"` 一个终端输入请求:`curl "http://127.0.0.1:8080/?sleep=20"`
3. 热升级 3. 热升级
`kill -HUP 进程ID` `kill -HUP 进程ID`
4. 打开一个终端输入请求:`curl "http://127.0.0.1:8080/?sleep=0"`
我们可以看到这样的结果第一个请求等待20s但是处理他的是老的进程热升级之后第一个请求还在执行最后会输出老的进程ID而第二次请求输出的是新的进程ID 4. 打开一个终端输入请求:`curl "http://127.0.0.1:8080/?sleep=0"`
我们可以看到这样的结果第一个请求等待20s但是处理他的是老的进程热升级之后第一个请求还在执行最后会输出老的进程ID而第二次请求输出的是新的进程ID

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@ -1,4 +1,5 @@
# 安装入门 # 安装入门
beego虽然是一个简单的框架但是其中用到了很多第三方的包所以在你安装beego的过程中Go会自动安装其他关联的包。 beego虽然是一个简单的框架但是其中用到了很多第三方的包所以在你安装beego的过程中Go会自动安装其他关联的包。
- 当然第一步你需要安装Go如何安装Go请参考我的书[第一章](https://github.com/astaxie/build-web-application-with-golang/blob/master/ebook/01.1.md) - 当然第一步你需要安装Go如何安装Go请参考我的书[第一章](https://github.com/astaxie/build-web-application-with-golang/blob/master/ebook/01.1.md)
@ -6,10 +7,10 @@ beego虽然是一个简单的框架但是其中用到了很多第三方的包
- 安装beego - 安装beego
go get github.com/astaxie/beego go get github.com/astaxie/beego
- 安装bee工具,这个工具可以用来快速的建立beego的应用 - 安装bee工具,这个工具可以用来快速的建立beego的应用
go get github.com/astaxie/bee go get github.com/astaxie/bee
这样就完成了beego的安装你就可以开始开发了,可以通过bee工具来创建beego项目 这样就完成了beego的安装你就可以开始开发了,可以通过bee工具来创建beego项目
@ -19,6 +20,7 @@ beego虽然是一个简单的框架但是其中用到了很多第三方的包
> - session模块github.com/astaxie/beego/session > - session模块github.com/astaxie/beego/session
> - session模块中支持redis引擎github.com/garyburd/redigo/redis > - session模块中支持redis引擎github.com/garyburd/redigo/redis
> - session模块中支持mysql引擎github.com/go-sql-driver/mysql > - session模块中支持mysql引擎github.com/go-sql-driver/mysql
@ -27,4 +29,4 @@ beego虽然是一个简单的框架但是其中用到了很多第三方的包
- [beego介绍](README.md) - [beego介绍](README.md)
- [快速入门](Quickstart.md) - [快速入门](Quickstart.md)

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@ -1,4 +1,5 @@
# 快速入门 # 快速入门
你对beego一无所知没关系这篇文档会很好的详细介绍beego的各个方面看这个文档之前首先确认你已经安装了beego如果你没有安装的话请看这篇[安装指南](Install.md) 你对beego一无所知没关系这篇文档会很好的详细介绍beego的各个方面看这个文档之前首先确认你已经安装了beego如果你没有安装的话请看这篇[安装指南](Install.md)
**导航** **导航**
@ -23,11 +24,13 @@
- [第三方应用集成](#-19) - [第三方应用集成](#-19)
- [部署编译应用](#-20) - [部署编译应用](#-20)
## 最小应用 ## 最小应用
一个最小最简单的应用如下代码所示: 一个最小最简单的应用如下代码所示:
package main package main
import ( import (
"github.com/astaxie/beego" "github.com/astaxie/beego"
) )
@ -59,7 +62,7 @@
2、定义Controller这里我们定义了一个struct为`MainController`充分利用了Go语言的组合的概念匿名包含了`beego.Controller`,这样我们的`MainController`就拥有了`beego.Controller`的所有方法。 2、定义Controller这里我们定义了一个struct为`MainController`充分利用了Go语言的组合的概念匿名包含了`beego.Controller`,这样我们的`MainController`就拥有了`beego.Controller`的所有方法。
3、定义RESTFul方法通过匿名组合之后其实目前的`MainController`已经拥有了`Get`、`Post`、`Delete`、`Put`等方法这些方法是分别用来对应用户请求的Method函数如果用户发起的是`POST`请求,那么就执行`Post`函数。所以这里我们定义了`MainController`的`Get`方法用来重写继承的`Get`函数,这样当用户`GET`请求的时候就会执行该函数。 3、定义RESTFul方法通过匿名组合之后其实目前的`MainController`已经拥有了`Get`、`Post`、`Delete`、`Put`等方法这些方法是分别用来对应用户请求的Method函数如果用户发起的是`POST`请求,那么就执行`Post`函数。所以这里我们定义了`MainController`的`Get`方法用来重写继承的`Get`函数,这样当用户`GET`请求的时候就会执行该函数。
4、定义main函数所有的Go应用程序和C语言一样都是Main函数作为入口所以我们这里定义了我们应用的入口。 4、定义main函数所有的Go应用程序和C语言一样都是Main函数作为入口所以我们这里定义了我们应用的入口。
5、Router注册路由路由就是告诉beego当用户来请求的时候该如何去调用相应的Controller这里我们注册了请求`/`的时候,请求到`MainController`。这里我们需要知道Router函数的两个参数函数第一个是路径第二个是Controller的指针。 5、Router注册路由路由就是告诉beego当用户来请求的时候该如何去调用相应的Controller这里我们注册了请求`/`的时候,请求到`MainController`。这里我们需要知道Router函数的两个参数函数第一个是路径第二个是Controller的指针。
@ -68,12 +71,13 @@
停止服务的话,请按`ctrl+c` 停止服务的话,请按`ctrl+c`
## 新建项目 ## 新建项目
通过如下命令创建beego项目首先进入gopath目录 通过如下命令创建beego项目首先进入gopath目录
bee create hello bee create hello
这样就建立了一个项目hello目录结构如下所示 这样就建立了一个项目hello目录结构如下所示
. .
@ -90,10 +94,11 @@
└── views └── views
└── index.tpl └── index.tpl
## 开发模式 ## 开发模式
通过bee创建的项目beego默认情况下是开发模式。 通过bee创建的项目beego默认情况下是开发模式。
我们可以通过如下的方式改变我们的模式: 我们可以通过如下的方式改变我们的模式:
beego.RunMode = "pro" beego.RunMode = "pro"
@ -115,6 +120,7 @@
![](images/dev.png) ![](images/dev.png)
## 路由设置 ## 路由设置
路由的主要功能是实现从请求地址到实现方法beego中封装了`Controller`,所以路由是从路径到`ControllerInterface`的过程,`ControllerInterface`的方法有如下: 路由的主要功能是实现从请求地址到实现方法beego中封装了`Controller`,所以路由是从路径到`ControllerInterface`的过程,`ControllerInterface`的方法有如下:
@ -144,40 +150,42 @@
为了用户更加方便的路由设置beego参考了sinatra的路由实现支持多种方式的路由 为了用户更加方便的路由设置beego参考了sinatra的路由实现支持多种方式的路由
- beego.Router("/api/:id([0-9]+)", &controllers.RController{}) - beego.Router("/api/:id([0-9]+)", &controllers.RController{})
自定义正则匹配 //匹配 /api/123 :id= 123 自定义正则匹配 //匹配 /api/123 :id= 123
- beego.Router("/news/:all", &controllers.RController{}) - beego.Router("/news/:all", &controllers.RController{})
全匹配方式 //匹配 /news/path/to/123.html :all= path/to/123.html 全匹配方式 //匹配 /news/path/to/123.html :all= path/to/123.html
- beego.Router(\`/user/:username([\w]+)\`, &controllers.RController{}) - beego.Router(\`/user/:username([\w]+)\`, &controllers.RController{})
正则字符串匹配 //匹配 /user/astaxie :username = astaxie 正则字符串匹配 //匹配 /user/astaxie :username = astaxie
- beego.Router("/download/*.*", &controllers.RController{}) - beego.Router("/download/*.*", &controllers.RController{})
*匹配方式 //匹配 /download/file/api.xml :path= file/api :ext=xml *匹配方式 //匹配 /download/file/api.xml :path= file/api :ext=xml
- beego.Router("/download/ceshi/*", &controllers.RController{}) - beego.Router("/download/ceshi/*", &controllers.RController{})
*全匹配方式 //匹配 /download/ceshi/file/api.json :splat=file/api.json *全匹配方式 //匹配 /download/ceshi/file/api.json :splat=file/api.json
- beego.Router("/:id:int", &controllers.RController{}) - beego.Router("/:id:int", &controllers.RController{})
int类型设置方式 //匹配 :id为int类型框架帮你实现了正则([0-9]+) int类型设置方式 //匹配 :id为int类型框架帮你实现了正则([0-9]+)
- beego.Router("/:hi:string", &controllers.RController{}) - beego.Router("/:hi:string", &controllers.RController{})
string类型设置方式 //匹配 :hi为string类型。框架帮你实现了正则([\w]+) string类型设置方式 //匹配 :hi为string类型。框架帮你实现了正则([\w]+)
如何在Controller中获取上面的变量可以通过如下方式获取 如何在Controller中获取上面的变量可以通过如下方式获取
this.Ctx.Params[":id"] this.Ctx.Params[":id"]
this.Ctx.Params[":username"] this.Ctx.Params[":username"]
this.Ctx.Params[":splat"] this.Ctx.Params[":splat"]
this.Ctx.Params[":path"] this.Ctx.Params[":path"]
this.Ctx.Params[":ext"] this.Ctx.Params[":ext"]
## 静态文件 ## 静态文件
Go语言内部其实已经提供了`http.ServeFile`通过这个函数可以实现静态文件的服务。beego针对这个功能进行了一层封装通过下面的方式进行静态文件注册 Go语言内部其实已经提供了`http.ServeFile`通过这个函数可以实现静态文件的服务。beego针对这个功能进行了一层封装通过下面的方式进行静态文件注册
beego.SetStaticPath("/static","public") beego.SetStaticPath("/static","public")
- 第一个参数是路径url路径信息 - 第一个参数是路径url路径信息
- 第二个参数是静态文件目录(相对应用所在的目录) - 第二个参数是静态文件目录(相对应用所在的目录)
@ -189,37 +197,41 @@ beego支持多个目录的静态文件注册用户可以注册如下的静态
设置了如上的静态目录之后,用户访问`/images/login/login.png`,那么就会访问应用对应的目录下面的`images/login/login.png`文件。如果是访问`/static/img/logo.png`,那么就访问`public/img/logo.png`文件。 设置了如上的静态目录之后,用户访问`/images/login/login.png`,那么就会访问应用对应的目录下面的`images/login/login.png`文件。如果是访问`/static/img/logo.png`,那么就访问`public/img/logo.png`文件。
## 过滤和中间件 ## 过滤和中间件
beego支持自定义过滤中间件例如安全验证强制跳转等 beego支持自定义过滤中间件例如安全验证强制跳转等
如下例子所示验证用户名是否是admin应用于全部的请求 如下例子所示验证用户名是否是admin应用于全部的请求
var FilterUser = func(w http.ResponseWriter, r *http.Request) { var FilterUser = func(w http.ResponseWriter, r *http.Request) {
if r.URL.User == nil || r.URL.User.Username() != "admin" { if r.URL.User == nil || r.URL.User.Username() != "admin" {
http.Error(w, "", http.StatusUnauthorized) http.Error(w, "", http.StatusUnauthorized)
} }
} }
beego.Filter(FilterUser)
beego.Filter(FilterUser)
还可以通过参数进行过滤,如果匹配参数就执行 还可以通过参数进行过滤,如果匹配参数就执行
beego.Router("/:id([0-9]+)", &admin.EditController{}) beego.Router("/:id([0-9]+)", &admin.EditController{})
beego.FilterParam("id", func(rw http.ResponseWriter, r *http.Request) { beego.FilterParam("id", func(rw http.ResponseWriter, r *http.Request) {
dosomething() dosomething()
}) })
当然你还可以通过前缀过滤 当然你还可以通过前缀过滤
beego.FilterPrefixPath("/admin", func(rw http.ResponseWriter, r *http.Request) { beego.FilterPrefixPath("/admin", func(rw http.ResponseWriter, r *http.Request) {
dosomething() dosomething()
}) })
## 控制器设计 ## 控制器设计
基于beego的Controller设计只需要匿名组合`beego.Controller`就可以了,如下所示: 基于beego的Controller设计只需要匿名组合`beego.Controller`就可以了,如下所示:
type xxxController struct { type xxxController struct {
beego.Controller beego.Controller
} }
`beego.Controller`实现了接口`beego.ControllerInterface``beego.ControllerInterface`定义了如下函数: `beego.Controller`实现了接口`beego.ControllerInterface``beego.ControllerInterface`定义了如下函数:
@ -227,15 +239,15 @@ beego支持自定义过滤中间件例如安全验证强制跳转等
- Init(ct *Context, cn string) - Init(ct *Context, cn string)
这个函数主要初始化了Context、相应的Controller名称模板名初始化模板参数的容器Data 这个函数主要初始化了Context、相应的Controller名称模板名初始化模板参数的容器Data
- Prepare() - Prepare()
这个函数主要是为了用户扩展用的这个函数会在下面定义的这些Method方法之前执行用户可以重写这个函数实现类似用户验证之类。 这个函数主要是为了用户扩展用的这个函数会在下面定义的这些Method方法之前执行用户可以重写这个函数实现类似用户验证之类。
- Get() - Get()
如果用户请求的HTTP Method是GET, 那么就执行该函数默认是403用户继承的子struct中可以实现了该方法以处理Get请求. 如果用户请求的HTTP Method是GET, 那么就执行该函数默认是403用户继承的子struct中可以实现了该方法以处理Get请求.
- Post() - Post()
如果用户请求的HTTP Method是POST, 那么就执行该函数默认是403用户继承的子struct中可以实现了该方法以处理Post请求. 如果用户请求的HTTP Method是POST, 那么就执行该函数默认是403用户继承的子struct中可以实现了该方法以处理Post请求.
@ -271,60 +283,71 @@ beego支持自定义过滤中间件例如安全验证强制跳转等
所以通过子struct的方法重写用户就可以实现自己的逻辑接下来我们看一个实际的例子 所以通过子struct的方法重写用户就可以实现自己的逻辑接下来我们看一个实际的例子
type AddController struct { type AddController struct {
beego.Controller beego.Controller
} }
func (this *AddController) Prepare() {
}
func (this *AddController) Get() {
this.Data["content"] ="value"
this.Layout = "admin/layout.html"
this.TplNames = "admin/add.tpl"
}
func (this *AddController) Post() {
pkgname := this.GetString("pkgname")
content := this.GetString("content")
pk := models.GetCruPkg(pkgname)
if pk.Id == 0 {
var pp models.PkgEntity
pp.Pid = 0
pp.Pathname = pkgname
pp.Intro = pkgname
models.InsertPkg(pp)
pk = models.GetCruPkg(pkgname)
}
var at models.Article
at.Pkgid = pk.Id
at.Content = content
models.InsertArticle(at)
this.Ctx.Redirect(302, "/admin/index")
}
func (this *AddController) Prepare() {
}
func (this *AddController) Get() {
this.Data["content"] = "value"
this.Layout = "admin/layout.html"
this.TplNames = "admin/add.tpl"
}
func (this *AddController) Post() {
pkgname := this.GetString("pkgname")
content := this.GetString("content")
pk := models.GetCruPkg(pkgname)
if pk.Id == 0 {
var pp models.PkgEntity
pp.Pid = 0
pp.Pathname = pkgname
pp.Intro = pkgname
models.InsertPkg(pp)
pk = models.GetCruPkg(pkgname)
}
var at models.Article
at.Pkgid = pk.Id
at.Content = content
models.InsertArticle(at)
this.Ctx.Redirect(302, "/admin/index")
}
## 模板处理 ## 模板处理
### 模板目录 ### 模板目录
beego中默认的模板目录是`views`用户可以把你的模板文件放到该目录下beego会自动在该目录下的所有模板文件进行解析并缓存开发模式下会每次重新解析不做缓存。当然用户可以通过如下的方式改变模板的目录 beego中默认的模板目录是`views`用户可以把你的模板文件放到该目录下beego会自动在该目录下的所有模板文件进行解析并缓存开发模式下会每次重新解析不做缓存。当然用户可以通过如下的方式改变模板的目录
beego.ViewsPath = "/myviewpath" beego.ViewsPath = "/myviewpath"
### 自动渲染 ### 自动渲染
beego中用户无需手动的调用渲染输出模板beego会自动的在调用完相应的method方法之后调用Render函数当然如果你的应用是不需要模板输出的那么你可以在配置文件或者在main.go中设置关闭自动渲染。 beego中用户无需手动的调用渲染输出模板beego会自动的在调用完相应的method方法之后调用Render函数当然如果你的应用是不需要模板输出的那么你可以在配置文件或者在main.go中设置关闭自动渲染。
配置文件配置如下: 配置文件配置如下:
autorender = false autorender = false
main.go文件中设置如下 main.go文件中设置如下
beego.AutoRender = false beego.AutoRender = false
### 模板数据 ### 模板数据
模板中的数据是通过在Controller中`this.Data`获取的,所以如果你想在模板中获取内容`{{.Content}}`,那么你需要在Controller中如下设置 模板中的数据是通过在Controller中`this.Data`获取的,所以如果你想在模板中获取内容`{{.Content}}`,那么你需要在Controller中如下设置
this.Data["Context"] = "value" this.Data["Context"] = "value"
### 模板名称 ### 模板名称
beego采用了Go语言内置的模板引擎所有模板的语法和Go的一模一样至于如何写模板文件详细的请参考[模板教程](https://github.com/astaxie/build-web-application-with-golang/blob/master/ebook/07.4.md)。 beego采用了Go语言内置的模板引擎所有模板的语法和Go的一模一样至于如何写模板文件详细的请参考[模板教程](https://github.com/astaxie/build-web-application-with-golang/blob/master/ebook/07.4.md)。
用户通过在Controller的对应方法中设置相应的模板名称beego会自动的在viewpath目录下查询该文件并渲染例如下面的设置beego会在admin下面找add.tpl文件进行渲染 用户通过在Controller的对应方法中设置相应的模板名称beego会自动的在viewpath目录下查询该文件并渲染例如下面的设置beego会在admin下面找add.tpl文件进行渲染
@ -341,16 +364,18 @@ beego采用了Go语言内置的模板引擎所有模板的语法和Go的一
也就是你对应的Controller名字+请求方法名.模板后缀也就是如果你的Controller名是`AddController`,请求方法是`POST`,默认的文件后缀是`tpl`,那么就会默认请求`/viewpath/AddController/POST.tpl`文件。 也就是你对应的Controller名字+请求方法名.模板后缀也就是如果你的Controller名是`AddController`,请求方法是`POST`,默认的文件后缀是`tpl`,那么就会默认请求`/viewpath/AddController/POST.tpl`文件。
### layout设计 ### layout设计
beego支持layout设计例如你在管理系统中其实整个的管理界面是固定的只会变化中间的部分那么你可以通过如下的设置 beego支持layout设计例如你在管理系统中其实整个的管理界面是固定的只会变化中间的部分那么你可以通过如下的设置
this.Layout = "admin/layout.html" this.Layout = "admin/layout.html"
this.TplNames = "admin/add.tpl" this.TplNames = "admin/add.tpl"
在layout.html中你必须设置如下的变量 在layout.html中你必须设置如下的变量
{{.LayoutContent}} {{.LayoutContent}}
beego就会首先解析TplNames指定的文件获取内容赋值给LayoutContent然后最后渲染layout.html文件。 beego就会首先解析TplNames指定的文件获取内容赋值给LayoutContent然后最后渲染layout.html文件。
目前采用首先把目录下所有的文件进行缓存所以用户还可以通过类似这样的方式实现layout 目前采用首先把目录下所有的文件进行缓存所以用户还可以通过类似这样的方式实现layout
@ -359,12 +384,14 @@ beego就会首先解析TplNames指定的文件获取内容赋值给LayoutCont
处理逻辑 处理逻辑
{{template "footer.html"}} {{template "footer.html"}}
### 模板函数 ### 模板函数
beego支持用户定义模板函数但是必须在`beego.Run()`调用之前,设置如下: beego支持用户定义模板函数但是必须在`beego.Run()`调用之前,设置如下:
func hello(in string)(out string){ func hello(in string)(out string){
out = in + "world" out = in + "world"
return return
} }
beego.AddFuncMap("hi",hello) beego.AddFuncMap("hi",hello)
@ -375,35 +402,45 @@ beego支持用户定义模板函数但是必须在`beego.Run()`调用之前
目前beego内置的模板函数有如下 目前beego内置的模板函数有如下
* markdown * markdown
实现了把markdown文本转化为html信息使用方法{{markdown .Content}} 实现了把markdown文本转化为html信息使用方法{{markdown .Content}}
* dateformat
* dateformat
实现了时间的格式化,返回字符串,使用方法{{dateformat .Time "2006-01-02T15:04:05Z07:00"}} 实现了时间的格式化,返回字符串,使用方法{{dateformat .Time "2006-01-02T15:04:05Z07:00"}}
* date
* date
实现了类似PHP的date函数可以很方便的根据字符串返回时间使用方法{{date .T "Y-m-d H:i:s"}} 实现了类似PHP的date函数可以很方便的根据字符串返回时间使用方法{{date .T "Y-m-d H:i:s"}}
* compare
* compare
实现了比较两个对象的比较如果相同返回true否者false使用方法{{compare .A .B}} 实现了比较两个对象的比较如果相同返回true否者false使用方法{{compare .A .B}}
* substr
* substr
实现了字符串的截取,支持中文截取的完美截取,使用方法{{substr .Str 0 30}} 实现了字符串的截取,支持中文截取的完美截取,使用方法{{substr .Str 0 30}}
* html2str
* html2str
实现了把html转化为字符串剔除一些script、css之类的元素返回纯文本信息使用方法{{html2str .Htmlinfo}} 实现了把html转化为字符串剔除一些script、css之类的元素返回纯文本信息使用方法{{html2str .Htmlinfo}}
* str2html
* str2html
实现了把相应的字符串当作HTML来输出不转义使用方法{{str2html .Strhtml}} 实现了把相应的字符串当作HTML来输出不转义使用方法{{str2html .Strhtml}}
* htmlquote
* htmlquote
实现了基本的html字符转义使用方法{{htmlquote .quote}} 实现了基本的html字符转义使用方法{{htmlquote .quote}}
* htmlunquote
* htmlunquote
实现了基本的反转移字符,使用方法{{htmlunquote .unquote}} 实现了基本的反转移字符,使用方法{{htmlunquote .unquote}}
## request处理 ## request处理
我们经常需要获取用户传递的数据包括Get、POST等方式的请求beego里面会自动解析这些数据你可以通过如下方式获取数据 我们经常需要获取用户传递的数据包括Get、POST等方式的请求beego里面会自动解析这些数据你可以通过如下方式获取数据
- GetString(key string) string - GetString(key string) string
@ -425,16 +462,18 @@ beego支持用户定义模板函数但是必须在`beego.Run()`调用之前
func (this *MainController) Post() { func (this *MainController) Post() {
id := this.Input().Get("id") id := this.Input().Get("id")
intid, err := strconv.Atoi(id) intid, err := strconv.Atoi(id)
} }
更多其他的request的信息用户可以通过`this.Ctx.Request`获取信息,关于该对象的属性和方法参考手册[Request](http://golang.org/pkg/net/http/#Request) 更多其他的request的信息用户可以通过`this.Ctx.Request`获取信息,关于该对象的属性和方法参考手册[Request](http://golang.org/pkg/net/http/#Request)
### 文件上传 ### 文件上传
在beego中你可以很容易的处理文件上传就是别忘记在你的form表单中增加这个属性`enctype="multipart/form-data"`,否者你的浏览器不会传输你的上传文件。 在beego中你可以很容易的处理文件上传就是别忘记在你的form表单中增加这个属性`enctype="multipart/form-data"`,否者你的浏览器不会传输你的上传文件。
文件上传之后一般是放在系统的内存里面如果文件的size大于设置的缓存内存大小那么就放在临时文件中默认的缓存内存是64M你可以通过如下来调整这个缓存内存大小: 文件上传之后一般是放在系统的内存里面如果文件的size大于设置的缓存内存大小那么就放在临时文件中默认的缓存内存是64M你可以通过如下来调整这个缓存内存大小:
beego.MaxMemory = 1<<22 beego.MaxMemory = 1<<22
或者在配置文件中通过如下设置 或者在配置文件中通过如下设置
@ -445,42 +484,46 @@ beego提供了两个很方便的方法来处理文件上传
- GetFile(key string) (multipart.File, *multipart.FileHeader, error) - GetFile(key string) (multipart.File, *multipart.FileHeader, error)
该方法主要用于用户读取表单中的文件名`the_file`,然后返回相应的信息,用户根据这些变量来处理文件上传:过滤、保存文件等。 该方法主要用于用户读取表单中的文件名`the_file`,然后返回相应的信息,用户根据这些变量来处理文件上传:过滤、保存文件等。
- SaveToFile(fromfile, tofile string) error - SaveToFile(fromfile, tofile string) error
该方法是在GetFile的基础上实现了快速保存的功能 该方法是在GetFile的基础上实现了快速保存的功能
保存的代码例子如下: 保存的代码例子如下:
func (this *MainController) Post() { func (this *MainController) Post() {
this.SaveToFile("the_file","/var/www/uploads/uploaded_file.txt"") this.SaveToFile("the_file","/var/www/uploads/uploaded_file.txt"")
} }
### JSON和XML输出 ### JSON和XML输出
beego当初设计的时候就考虑了API功能的设计而我们在设计API的时候经常是输出JSON或者XML数据那么beego提供了这样的方式直接输出 beego当初设计的时候就考虑了API功能的设计而我们在设计API的时候经常是输出JSON或者XML数据那么beego提供了这样的方式直接输出
JSON数据直接输出设置`content-type`为`application/json` JSON数据直接输出设置`content-type`为`application/json`
func (this *AddController) Get() { func (this *AddController) Get() {
mystruct := { ... } mystruct := { ... }
this.Data["json"] = &mystruct this.Data["json"] = &mystruct
this.ServeJson() this.ServeJson()
} }
XML数据直接输出设置`content-type`为`application/xml` XML数据直接输出设置`content-type`为`application/xml`
func (this *AddController) Get() { func (this *AddController) Get() {
mystruct := { ... } mystruct := { ... }
this.Data["xml"]=&mystruct this.Data["xml"]=&mystruct
this.ServeXml() this.ServeXml()
} }
## 跳转和错误 ## 跳转和错误
我们在做Web开发的时候经常会遇到页面调整和错误处理beego这这方面也进行了考虑通过`Redirect`方法来进行跳转: 我们在做Web开发的时候经常会遇到页面调整和错误处理beego这这方面也进行了考虑通过`Redirect`方法来进行跳转:
func (this *AddController) Get() { func (this *AddController) Get() {
this.Redirect("/", 302) this.Redirect("/", 302)
} }
如何中止此次请求并抛出异常beego可以在控制器中这操作 如何中止此次请求并抛出异常beego可以在控制器中这操作
@ -494,12 +537,12 @@ XML数据直接输出设置`content-type`为`application/xml`
this.SetSession("asta", v.(int)+1) this.SetSession("asta", v.(int)+1)
this.Data["Email"] = v.(int) this.Data["Email"] = v.(int)
} }
this.TplNames = "index.tpl" this.TplNames = "index.tpl"
} }
这样`this.Abort("401")`之后的代码不会再执行,而且会默认显示给用户如下页面 这样`this.Abort("401")`之后的代码不会再执行,而且会默认显示给用户如下页面
![](images/401.png) ![](images/401.png)
beego框架默认支持404、401、403、500、503这几种错误的处理。用户可以自定义相应的错误处理例如下面重新定义404页面 beego框架默认支持404、401、403、500、503这几种错误的处理。用户可以自定义相应的错误处理例如下面重新定义404页面
@ -514,7 +557,7 @@ beego框架默认支持404、401、403、500、503这几种错误的处理。用
beego.Errorhandler("404",page_not_found) beego.Errorhandler("404",page_not_found)
beego.Router("/", &controllers.MainController{}) beego.Router("/", &controllers.MainController{})
beego.Run() beego.Run()
} }
我们可以通过自定义错误页面`404.html`来处理404错误。 我们可以通过自定义错误页面`404.html`来处理404错误。
@ -526,33 +569,37 @@ beego更加人性化的还有一个设计就是支持用户自定义字符串错
data["content"] = "database is now down" data["content"] = "database is now down"
t.Execute(rw, data) t.Execute(rw, data)
} }
func main() { func main() {
beego.Errorhandler("dbError",dbError) beego.Errorhandler("dbError",dbError)
beego.Router("/", &controllers.MainController{}) beego.Router("/", &controllers.MainController{})
beego.Run() beego.Run()
} }
一旦在入口注册该错误处理代码,那么你可以在任何你的逻辑中遇到数据库错误调用`this.Abort("dbError")`来进行异常页面处理。 一旦在入口注册该错误处理代码,那么你可以在任何你的逻辑中遇到数据库错误调用`this.Abort("dbError")`来进行异常页面处理。
## response处理 ## response处理
response可能会有集中情况 response可能会有集中情况
1. 模板输出 1. 模板输出
模板输出上面模板介绍里面已经介绍beego会在执行完相应的Controller里面的对应的Method之后输出到模板。 模板输出上面模板介绍里面已经介绍beego会在执行完相应的Controller里面的对应的Method之后输出到模板。
2. 跳转 2. 跳转
上一节介绍的跳转就是我们经常用到的页面之间的跳转 上一节介绍的跳转就是我们经常用到的页面之间的跳转
3. 字符串输出 3. 字符串输出
有些时候我们只是想输出相应的一个字符串,那么我们可以通过如下的代码实现 有些时候我们只是想输出相应的一个字符串,那么我们可以通过如下的代码实现
this.Ctx.WriteString("ok") this.Ctx.WriteString("ok")
## Sessions ## Sessions
beego内置了session模块目前session模块支持的后端引擎包括memory、file、mysql、redis四中用户也可以根据相应的interface实现自己的引擎。 beego内置了session模块目前session模块支持的后端引擎包括memory、file、mysql、redis四中用户也可以根据相应的interface实现自己的引擎。
beego中使用session相当方便只要在main入口函数中设置如下 beego中使用session相当方便只要在main入口函数中设置如下
@ -604,21 +651,21 @@ sess对象具有如下方法
- SessionOn - SessionOn
设置是否开启Session默认是false配置文件对应的参数名sessionon 设置是否开启Session默认是false配置文件对应的参数名sessionon
- SessionProvider - SessionProvider
设置Session的引擎默认是memory目前支持还有file、mysql、redis等配置文件对应的参数名sessionprovider 设置Session的引擎默认是memory目前支持还有file、mysql、redis等配置文件对应的参数名sessionprovider
- SessionName - SessionName
设置cookies的名字Session默认是保存在用户的浏览器cookies里面的默认名是beegosessionID配置文件对应的参数名是sessionname 设置cookies的名字Session默认是保存在用户的浏览器cookies里面的默认名是beegosessionID配置文件对应的参数名是sessionname
- SessionGCMaxLifetime - SessionGCMaxLifetime
设置Session过期的时间默认值是3600秒配置文件对应的参数sessiongcmaxlifetime 设置Session过期的时间默认值是3600秒配置文件对应的参数sessiongcmaxlifetime
- SessionSavePath - SessionSavePath
设置对应file、mysql、redis引擎的保存路径或者链接地址默认值是空配置文件对应的参数sessionsavepath 设置对应file、mysql、redis引擎的保存路径或者链接地址默认值是空配置文件对应的参数sessionsavepath
@ -631,13 +678,15 @@ sess对象具有如下方法
beego.SessionProvider = "mysql" beego.SessionProvider = "mysql"
beego.SessionSavePath = "username:password@protocol(address)/dbname?param=value" beego.SessionSavePath = "username:password@protocol(address)/dbname?param=value"
当SessionProvider为redis时SessionSavePath是redis的链接地址采用了[redigo](https://github.com/garyburd/redigo),如下所示: 当SessionProvider为redis时SessionSavePath是redis的链接地址采用了[redigo](https://github.com/garyburd/redigo),如下所示:
beego.SessionProvider = "redis" beego.SessionProvider = "redis"
beego.SessionSavePath = "127.0.0.1:6379" beego.SessionSavePath = "127.0.0.1:6379"
## Cache设置 ## Cache设置
beego内置了一个cache模块实现了类似memcache的功能缓存数据在内存中主要的使用方法如下 beego内置了一个cache模块实现了类似memcache的功能缓存数据在内存中主要的使用方法如下
var ( var (
@ -649,7 +698,7 @@ beego内置了一个cache模块实现了类似memcache的功能缓存数
urllist.Every = 0 //不过期 urllist.Every = 0 //不过期
urllist.Start() urllist.Start()
} }
func (this *ShortController) Post() { func (this *ShortController) Post() {
var result ShortResult var result ShortResult
longurl := this.Input().Get("longurl") longurl := this.Input().Get("longurl")
@ -672,8 +721,8 @@ beego内置了一个cache模块实现了类似memcache的功能缓存数
} }
this.Data["json"] = result this.Data["json"] = result
this.ServeJson() this.ServeJson()
} }
上面这个例子演示了如何使用beego的Cache模块主要是通过`beego.NewBeeCache`初始化一个对象,然后设置过期时间,开启过期检测,在业务逻辑中就可以通过如下的接口进行增删改的操作: 上面这个例子演示了如何使用beego的Cache模块主要是通过`beego.NewBeeCache`初始化一个对象,然后设置过期时间,开启过期检测,在业务逻辑中就可以通过如下的接口进行增删改的操作:
- Get(name string) interface{} - Get(name string) interface{}
@ -681,7 +730,9 @@ beego内置了一个cache模块实现了类似memcache的功能缓存数
- Delete(name string) (ok bool, err error) - Delete(name string) (ok bool, err error)
- IsExist(name string) bool - IsExist(name string) bool
## 安全的Map ## 安全的Map
我们知道在Go语言里面map是非线程安全的详细的[atomic_maps](http://golang.org/doc/faq#atomic_maps)。但是我们在平常的业务中经常需要用到线程安全的map特别是在goroutine的情况下所以beego内置了一个简单的线程安全的map 我们知道在Go语言里面map是非线程安全的详细的[atomic_maps](http://golang.org/doc/faq#atomic_maps)。但是我们在平常的业务中经常需要用到线程安全的map特别是在goroutine的情况下所以beego内置了一个简单的线程安全的map
bm := NewBeeMap() bm := NewBeeMap()
@ -691,16 +742,16 @@ beego内置了一个cache模块实现了类似memcache的功能缓存数
if !bm.Check("astaxie") { if !bm.Check("astaxie") {
t.Error("check err") t.Error("check err")
} }
if v := bm.Get("astaxie"); v.(int) != 1 { if v := bm.Get("astaxie"); v.(int) != 1 {
t.Error("get err") t.Error("get err")
} }
bm.Delete("astaxie") bm.Delete("astaxie")
if bm.Check("astaxie") { if bm.Check("astaxie") {
t.Error("delete err") t.Error("delete err")
} }
上面演示了如何使用线程安全的Map主要的接口有 上面演示了如何使用线程安全的Map主要的接口有
- Get(k interface{}) interface{} - Get(k interface{}) interface{}
@ -708,7 +759,9 @@ beego内置了一个cache模块实现了类似memcache的功能缓存数
- Check(k interface{}) bool - Check(k interface{}) bool
- Delete(k interface{}) - Delete(k interface{})
## 日志处理 ## 日志处理
beego默认有一个初始化的BeeLogger对象输出内容到stdout中你可以通过如下的方式设置自己的输出 beego默认有一个初始化的BeeLogger对象输出内容到stdout中你可以通过如下的方式设置自己的输出
beego.SetLogger(*log.Logger) beego.SetLogger(*log.Logger)
@ -717,11 +770,13 @@ beego默认有一个初始化的BeeLogger对象输出内容到stdout中你可
fd,err := os.OpenFile("/var/log/beeapp/beeapp.log", os.O_RDWR|os.O_APPEND, 0644) fd,err := os.OpenFile("/var/log/beeapp/beeapp.log", os.O_RDWR|os.O_APPEND, 0644)
if err != nil { if err != nil {
beego.Critical("openfile beeapp.log:", err) beego.Critical("openfile beeapp.log:", err)
return return
} }
lg := log.New(fd, "", log.Ldate|log.Ltime) lg := log.New(fd, "", log.Ldate|log.Ltime)
beego.SetLogger(lg) beego.SetLogger(lg)
### 不同级别的log日志函数 ### 不同级别的log日志函数
* Trace(v ...interface{}) * Trace(v ...interface{})
@ -734,84 +789,96 @@ beego默认有一个初始化的BeeLogger对象输出内容到stdout中你可
你可以通过下面的方式设置不同的日志分级: 你可以通过下面的方式设置不同的日志分级:
beego.SetLevel(beego.LevelError) beego.SetLevel(beego.LevelError)
当你代码中有很多日志输出之后如果想上线但是你不想输出Trace、Debug、Info等信息那么你可以设置如下 当你代码中有很多日志输出之后如果想上线但是你不想输出Trace、Debug、Info等信息那么你可以设置如下
beego.SetLevel(beego.LevelWarning) beego.SetLevel(beego.LevelWarning)
这样的话就不会输出小于这个level的日志日志的排序如下 这样的话就不会输出小于这个level的日志日志的排序如下
LevelTrace、LevelDebug、LevelInfo、LevelWarning、 LevelError、LevelCritical LevelTrace、LevelDebug、LevelInfo、LevelWarning、LevelError、LevelCritical
用户可以根据不同的级别输出不同的错误信息,如下例子所示: 用户可以根据不同的级别输出不同的错误信息,如下例子所示:
### Examples of log messages ### Examples of log messages
- Trace - Trace
* "Entered parse function validation block" * "Entered parse function validation block"
* "Validation: entered second 'if'" * "Validation: entered second 'if'"
* "Dictionary 'Dict' is empty. Using default value" * "Dictionary 'Dict' is empty. Using default value"
- Debug - Debug
* "Web page requested: http://somesite.com Params='...'" * "Web page requested: http://somesite.com Params='...'"
* "Response generated. Response size: 10000. Sending." * "Response generated. Response size: 10000. Sending."
* "New file received. Type:PNG Size:20000" * "New file received. Type:PNG Size:20000"
- Info - Info
* "Web server restarted" * "Web server restarted"
* "Hourly statistics: Requested pages: 12345 Errors: 123 ..." * "Hourly statistics: Requested pages: 12345 Errors: 123 ..."
* "Service paused. Waiting for 'resume' call" * "Service paused. Waiting for 'resume' call"
- Warn - Warn
* "Cache corrupted for file='test.file'. Reading from back-end" * "Cache corrupted for file='test.file'. Reading from back-end"
* "Database 192.168.0.7/DB not responding. Using backup 192.168.0.8/DB" * "Database 192.168.0.7/DB not responding. Using backup 192.168.0.8/DB"
* "No response from statistics server. Statistics not sent" * "No response from statistics server. Statistics not sent"
- Error - Error
* "Internal error. Cannot process request #12345 Error:...." * "Internal error. Cannot process request #12345 Error:...."
* "Cannot perform login: credentials DB not responding" * "Cannot perform login: credentials DB not responding"
- Critical - Critical
* "Critical panic received: .... Shutting down" * "Critical panic received: .... Shutting down"
* "Fatal error: ... App is shutting down to prevent data corruption or loss" * "Fatal error: ... App is shutting down to prevent data corruption or loss"
### Example ### Example
func internalCalculationFunc(x, y int) (result int, err error) { func internalCalculationFunc(x, y int) (result int, err error) {
beego.Debug("calculating z. x:",x," y:",y) beego.Debug("calculating z. x:", x, " y:", y)
z := y z := y
switch { switch {
case x == 3 : case x == 3:
beego.Trace("x == 3") beego.Trace("x == 3")
panic("Failure.") panic("Failure.")
case y == 1 : case y == 1:
beego.Trace("y == 1") beego.Trace("y == 1")
return 0, errors.New("Error!") return 0, errors.New("Error!")
case y == 2 : case y == 2:
beego.Trace("y == 2") beego.Trace("y == 2")
z = x z = x
default : default:
beego.Trace("default") beego.Trace("default")
z += x z += x
} }
retVal := z-3 retVal := z - 3
beego.Debug("Returning ", retVal) beego.Debug("Returning ", retVal)
return retVal, nil return retVal, nil
} }
func processInput(input inputData) { func processInput(input inputData) {
defer func() { defer func() {
if r := recover(); r != nil { if r := recover(); r != nil {
beego.Error("Unexpected error occurred: ", r) beego.Error("Unexpected error occurred: ", r)
outputs <- outputData{result : 0, error : true} outputs <- outputData{result: 0, error: true}
} }
}() }()
beego.Info("Received input signal. x:",input.x," y:", input.y) beego.Info("Received input signal. x:", input.x, " y:", input.y)
res, err := internalCalculationFunc(input.x, input.y) res, err := internalCalculationFunc(input.x, input.y)
if err != nil { if err != nil {
beego.Warn("Error in calculation:", err.Error()) beego.Warn("Error in calculation:", err.Error())
} }
beego.Info("Returning result: ",res," error: ",err) beego.Info("Returning result: ", res, " error: ", err)
outputs <- outputData{result : res, error : err != nil} outputs <- outputData{result: res, error: err != nil}
} }
func main() { func main() {
@ -828,16 +895,18 @@ LevelTrace、LevelDebug、LevelInfo、LevelWarning、 LevelError、LevelCritical
for { for {
select { select {
case input := <- inputs: case input := <-inputs:
processInput(input) processInput(input)
case <- criticalChan: case <-criticalChan:
beego.Critical("Caught value from criticalChan: Go shut down.") beego.Critical("Caught value from criticalChan: Go shut down.")
panic("Shut down due to critical fault.") panic("Shut down due to critical fault.")
} }
} }
} }
## 配置管理 ## 配置管理
beego支持解析ini文件, beego默认会解析当前应用下的`conf/app.conf`文件 beego支持解析ini文件, beego默认会解析当前应用下的`conf/app.conf`文件
通过这个文件你可以初始化很多beego的默认参数 通过这个文件你可以初始化很多beego的默认参数
@ -849,7 +918,7 @@ beego支持解析ini文件, beego默认会解析当前应用下的`conf/app.conf
autorender = false autorender = false
autorecover = false autorecover = false
viewspath = "myview" viewspath = "myview"
上面这些参数会替换beego默认的一些参数。 上面这些参数会替换beego默认的一些参数。
你可以在配置文件中配置应用需要用的一些配置信息,例如下面所示的数据库信息: 你可以在配置文件中配置应用需要用的一些配置信息,例如下面所示的数据库信息:
@ -858,7 +927,7 @@ beego支持解析ini文件, beego默认会解析当前应用下的`conf/app.conf
mysqlpass = "rootpass" mysqlpass = "rootpass"
mysqlurls = "127.0.0.1" mysqlurls = "127.0.0.1"
mysqldb = "beego" mysqldb = "beego"
那么你就可以通过如下的方式获取设置的配置信息: 那么你就可以通过如下的方式获取设置的配置信息:
beego.AppConfig.String("mysqluser") beego.AppConfig.String("mysqluser")
@ -874,45 +943,47 @@ AppConfig支持如下方法
- Float(key string) (float64, error) - Float(key string) (float64, error)
- String(key string) string - String(key string) string
## 系统默认参数 ## 系统默认参数
beego中带有很多可配置的参数我们来一一认识一下它们这样有利于我们在接下来的beego开发中可以充分的发挥他们的作用 beego中带有很多可配置的参数我们来一一认识一下它们这样有利于我们在接下来的beego开发中可以充分的发挥他们的作用
* BeeApp * BeeApp
beego默认启动的一个应用器入口在应用import beego的时候在init中已经初始化的。 beego默认启动的一个应用器入口在应用import beego的时候在init中已经初始化的。
* AppConfig * AppConfig
beego的配置文件解析之后的对象也是在init的时候初始化的里面保存有解析`conf/app.conf`下面所有的参数数据 beego的配置文件解析之后的对象也是在init的时候初始化的里面保存有解析`conf/app.conf`下面所有的参数数据
* AppConfigPath * AppConfigPath
配置文件所在的路径,默认是应用程序对应的目录下的`conf/app.conf`,用户可以修改该值配置自己的配置文件 配置文件所在的路径,默认是应用程序对应的目录下的`conf/app.conf`,用户可以修改该值配置自己的配置文件
* HttpAddr * HttpAddr
应用监听地址默认为空监听所有的网卡IP 应用监听地址默认为空监听所有的网卡IP
* HttpPort * HttpPort
应用监听端口默认为8080 应用监听端口默认为8080
* AppName * AppName
应用名称默认是beego 应用名称默认是beego
* RunMode * RunMode
应用的模式默认是dev为开发模式在开发模式下出错会提示友好的出错页面如前面错误描述中所述。 应用的模式默认是dev为开发模式在开发模式下出错会提示友好的出错页面如前面错误描述中所述。
* AutoRender * AutoRender
是否模板自动渲染默认值为true对于API类型的应用应用需要把该选项设置为false不需要渲染模板。 是否模板自动渲染默认值为true对于API类型的应用应用需要把该选项设置为false不需要渲染模板。
* RecoverPanic * RecoverPanic
是否异常恢复默认值为true即当应用出现异常的情况通过recover恢复回来而不会导致应用异常退出。 是否异常恢复默认值为true即当应用出现异常的情况通过recover恢复回来而不会导致应用异常退出。
* PprofOn * PprofOn
是否启用pprof默认是false当开启之后用户可以通过如下地址查看相应的goroutine执行情况 是否启用pprof默认是false当开启之后用户可以通过如下地址查看相应的goroutine执行情况
@ -922,48 +993,50 @@ beego中带有很多可配置的参数我们来一一认识一下它们
/debug/pprof/profile /debug/pprof/profile
/debug/pprof/symbol /debug/pprof/symbol
关于pprof的信息请参考官方的描述[pprof](http://golang.org/pkg/net/http/pprof/) 关于pprof的信息请参考官方的描述[pprof](http://golang.org/pkg/net/http/pprof/)
* ViewsPath * ViewsPath
模板路径默认值是views 模板路径默认值是views
* SessionOn * SessionOn
session是否开启默认是false session是否开启默认是false
* SessionProvider * SessionProvider
session的引擎默认是memory session的引擎默认是memory
* SessionName * SessionName
存在客户端的cookie名称默认值是beegosessionID 存在客户端的cookie名称默认值是beegosessionID
* SessionGCMaxLifetime * SessionGCMaxLifetime
session过期时间默认值是3600秒 session过期时间默认值是3600秒
* SessionSavePath * SessionSavePath
session保存路径默认是空 session保存路径默认是空
* UseFcgi * UseFcgi
是否启用fastcgi默认是false 是否启用fastcgi默认是false
* MaxMemory * MaxMemory
文件上传默认内存缓存大小,默认值是`1 << 26`(64M) 文件上传默认内存缓存大小,默认值是`1 << 26`(64M)
* EnableGzip * EnableGzip
是否开启gzip支持默认为false不支持gzip一旦开启了gzip那么在模板输出的内容会进行gzip或者zlib压缩根据用户的Accept-Encoding来判断。 是否开启gzip支持默认为false不支持gzip一旦开启了gzip那么在模板输出的内容会进行gzip或者zlib压缩根据用户的Accept-Encoding来判断。
## 第三方应用集成 ## 第三方应用集成
beego支持第三方应用的集成用户可以自定义`http.Handler`,用户可以通过如下方式进行注册路由: beego支持第三方应用的集成用户可以自定义`http.Handler`,用户可以通过如下方式进行注册路由:
beego.RouterHandler("/chat/:info(.*)", sockjshandler) beego.RouterHandler("/chat/:info(.*)", sockjshandler)
sockjshandler实现了接口`http.Handler`。 sockjshandler实现了接口`http.Handler`。
目前在beego的example中有支持sockjs的chat例子示例代码如下 目前在beego的example中有支持sockjs的chat例子示例代码如下
@ -982,7 +1055,7 @@ sockjshandler实现了接口`http.Handler`。
func chatHandler(s sockjs.Session) { func chatHandler(s sockjs.Session) {
users.Add(s) users.Add(s)
defer users.Remove(s) defer users.Remove(s)
for { for {
m := s.Receive() m := s.Receive()
if m == nil { if m == nil {
@ -1013,7 +1086,9 @@ sockjshandler实现了接口`http.Handler`。
通过上面的代码很简单的实现了一个多人的聊天室。上面这个只是一个sockjs的例子我想通过大家自定义`http.Handler`可以有很多种方式来进行扩展beego应用。 通过上面的代码很简单的实现了一个多人的聊天室。上面这个只是一个sockjs的例子我想通过大家自定义`http.Handler`可以有很多种方式来进行扩展beego应用。
## 部署编译应用 ## 部署编译应用
Go语言的应用最后编译之后是一个二进制文件你只需要copy这个应用到服务器上运行起来就行。beego由于带有几个静态文件、配置文件、模板文件三个目录所以用户部署的时候需要同时copy这三个目录到相应的部署应用之下下面以我实际的应用部署为例 Go语言的应用最后编译之后是一个二进制文件你只需要copy这个应用到服务器上运行起来就行。beego由于带有几个静态文件、配置文件、模板文件三个目录所以用户部署的时候需要同时copy这三个目录到相应的部署应用之下下面以我实际的应用部署为例
$ mkdir /opt/app/beepkg $ mkdir /opt/app/beepkg
@ -1021,7 +1096,7 @@ Go语言的应用最后编译之后是一个二进制文件你只需要copy
$ cp -fr views /opt/app/beepkg $ cp -fr views /opt/app/beepkg
$ cp -fr static /opt/app/beepkg $ cp -fr static /opt/app/beepkg
$ cp -fr conf /opt/app/beepkg $ cp -fr conf /opt/app/beepkg
这样在`/opt/app/beepkg`目录下面就会显示如下的目录结构: 这样在`/opt/app/beepkg`目录下面就会显示如下的目录结构:
. .
@ -1033,12 +1108,12 @@ Go语言的应用最后编译之后是一个二进制文件你只需要copy
│ └── js │ └── js
└── views └── views
└── index.tpl └── index.tpl
├── beepkg ├── beepkg
这样我们就已经把我们需要的应用搬到服务器了那么接下来就可以开始部署了我现在服务器端用两种方式来run 这样我们就已经把我们需要的应用搬到服务器了那么接下来就可以开始部署了我现在服务器端用两种方式来run
- Supervisord - Supervisord
安装和配置见[Supervisord](Supervisord.md) 安装和配置见[Supervisord](Supervisord.md)
- nohup方式 - nohup方式

View File

@ -18,22 +18,23 @@ beego是一个类似tornado的Go应用框架采用了RESTFul的方式来实
package main package main
import ( import (
"github.com/astaxie/beego" "github.com/astaxie/beego"
) )
type MainController struct { type MainController struct {
beego.Controller beego.Controller
} }
func (this *MainController) Get() { func (this *MainController) Get() {
this.Ctx.WriteString("hello world") this.Ctx.WriteString("hello world")
} }
func main() { func main() {
beego.Router("/", &MainController{}) beego.Router("/", &MainController{})
beego.Run() beego.Run()
} }
# beego 指南 # beego 指南
* [为什么设计beego](Why.md) * [为什么设计beego](Why.md)
@ -43,8 +44,9 @@ beego是一个类似tornado的Go应用框架采用了RESTFul的方式来实
* [beego案例](Application.md) * [beego案例](Application.md)
* [热升级](HotUpdate.md) * [热升级](HotUpdate.md)
# API接口 # API接口
API对于我们平时开发应用非常有用用于查询一些开发的函数godoc做的非常好了 API对于我们平时开发应用非常有用用于查询一些开发的函数godoc做的非常好了
[Go Walker](http://gowalker.org/github.com/astaxie/beego) [Go Walker](http://gowalker.org/github.com/astaxie/beego)

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1. setuptools安装 1. setuptools安装
wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg
sh setuptools-0.6c11-py2.7.egg sh setuptools-0.6c11-py2.7.egg
easy_install supervisor easy_install supervisor
echo_supervisord_conf >/etc/supervisord.conf echo_supervisord_conf >/etc/supervisord.conf
mkdir /etc/supervisord.conf.d mkdir /etc/supervisord.conf.d
2. 修改配置/etc/supervisord.conf 2. 修改配置/etc/supervisord.conf
[include] [include]
files = /etc/supervisord.conf.d/*.conf files = /etc/supervisord.conf.d/*.conf
3. 新建管理的应用 3. 新建管理的应用
cd /etc/supervisord.conf.d cd /etc/supervisord.conf.d
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startsecs = 5 startsecs = 5
user = root user = root
redirect_stderr = true redirect_stderr = true
stdout_logfile = /var/log/supervisord/beepkg.log stdout_logfile = /var/log/supervisord/beepkg.log

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# 一步一步跟我写博客 # 一步一步跟我写博客
## 创建项目 ## 创建项目
## 数据库结构设计 ## 数据库结构设计
## 控制器设计 ## 控制器设计
## 模板设计 ## 模板设计
## 用户登陆退出 ## 用户登陆退出
## 数据库操作
## 数据库操作

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整个的MVC逻辑中C是最重要的部分这一块采用了我上面说的接口方式M模块目前我还没想好怎么做但是大家可以参考我的另一个开源项目beedb来实现数据的管理V这一块目前采用了Go语言自带的模板引擎但是实现了很多方便的模板函数。这样一个简易的框架就完成了然后我就不断的完善周边的功能包括表单处理、session处理、日志处理、配置处理、自动化运行等功能。 整个的MVC逻辑中C是最重要的部分这一块采用了我上面说的接口方式M模块目前我还没想好怎么做但是大家可以参考我的另一个开源项目beedb来实现数据的管理V这一块目前采用了Go语言自带的模板引擎但是实现了很多方便的模板函数。这样一个简易的框架就完成了然后我就不断的完善周边的功能包括表单处理、session处理、日志处理、配置处理、自动化运行等功能。
- [beego介绍](README.md) - [beego介绍](README.md)
- [安装入门](Install.md) - [安装入门](Install.md)