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https://github.com/astaxie/beego.git
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new static file support code
This commit is contained in:
JessonChan
parent
82c50b972d
commit
d2c60619fa
228
staticfile.go
228
staticfile.go
@ -15,123 +15,173 @@
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package beego
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import (
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"bytes"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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"errors"
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"time"
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"github.com/astaxie/beego/acceptencoder"
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"github.com/astaxie/beego/context"
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"github.com/astaxie/beego/utils"
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)
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var notStaticRequestErr = errors.New("request not a static file request")
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func serverStaticRouter(ctx *context.Context) {
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if ctx.Input.Method() != "GET" && ctx.Input.Method() != "HEAD" {
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return
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}
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requestPath := filepath.Clean(ctx.Input.Request.URL.Path)
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forbidden, filePath, fileInfo, err := lookupFile(ctx)
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if err == notStaticRequestErr {
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return
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}
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if forbidden {
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exception("403", ctx)
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return
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}
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if filePath == "" || fileInfo == nil {
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if RunMode == "dev" {
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Warn("Can't find/open the file:", filePath, err)
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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}
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if fileInfo.IsDir() {
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//serveFile will list dir
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http.ServeFile(ctx.ResponseWriter, ctx.Request, filePath)
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return
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}
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var enableCompress = EnableGzip && isStaticCompress(filePath)
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var acceptEncoding string
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if enableCompress {
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acceptEncoding = context.ParseEncoding(ctx.Request)
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}
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b, n, sch, err := openFile(filePath, fileInfo, acceptEncoding)
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if err != nil {
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if RunMode == "dev" {
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Warn("Can't compress the file:", filePath, err)
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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}
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if b {
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ctx.Output.Header("Content-Encoding", n)
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} else {
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ctx.Output.Header("Content-Length", strconv.FormatInt(sch.size, 10))
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}
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http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, sch.modTime, sch)
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return
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}
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type serveContentHolder struct {
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*strings.Reader
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modTime time.Time
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size int64
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encoding string
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}
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var (
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staticFileMap = make(map[string]*serveContentHolder)
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mapLock sync.Mutex
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)
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func openFile(filePath string, fi os.FileInfo, acceptEncoding string) (bool, string, *serveContentHolder, error) {
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mapKey := acceptEncoding + ":" + filePath
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mapFile, ok := staticFileMap[mapKey]
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if ok {
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if mapFile.modTime == fi.ModTime() && mapFile.size == fi.Size() {
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return mapFile.encoding != "", mapFile.encoding, mapFile, nil
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}
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}
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mapLock.Lock()
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delete(staticFileMap, mapKey)
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defer mapLock.Unlock()
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if mapFile, ok = staticFileMap[mapKey]; !ok {
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file, err := os.Open(filePath)
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if err != nil {
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return false, "", nil, err
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}
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defer file.Close()
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var bufferWriter bytes.Buffer
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_, n, err := context.WriteFile(acceptEncoding, &bufferWriter, file)
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if err != nil {
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return false, "", nil, err
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}
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mapFile = &serveContentHolder{Reader: strings.NewReader(string(bufferWriter.Bytes())), modTime: fi.ModTime(), size: int64(bufferWriter.Len()), encoding: n}
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staticFileMap[mapKey] = mapFile
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}
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return mapFile.encoding != "", mapFile.encoding, mapFile, nil
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}
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func isStaticCompress(filePath string) bool {
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for _, statExtension := range StaticExtensionsToGzip {
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if strings.HasSuffix(strings.ToLower(filePath), strings.ToLower(statExtension)) {
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return true
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}
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}
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return false
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}
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func searchFile(ctx *context.Context) (string, os.FileInfo, error) {
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requestPath := filepath.Clean(ctx.Input.Request.URL.Path)
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// special processing : favicon.ico/robots.txt can be in any static dir
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if requestPath == "/favicon.ico" || requestPath == "/robots.txt" {
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file := path.Join(".", requestPath)
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if utils.FileExists(file) {
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http.ServeFile(ctx.ResponseWriter, ctx.Request, file)
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return
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if fi, _ := os.Stat(file); fi != nil {
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return file, fi, nil
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}
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for _, staticDir := range StaticDir {
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file := path.Join(staticDir, requestPath)
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if utils.FileExists(file) {
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http.ServeFile(ctx.ResponseWriter, ctx.Request, file)
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return
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filePath := path.Join(staticDir, requestPath)
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if fi, _ := os.Stat(filePath); fi != nil {
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return filePath, fi, nil
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}
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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return "", nil, errors.New(requestPath + " file not find")
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}
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for prefix, staticDir := range StaticDir {
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if len(prefix) == 0 {
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continue
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}
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if strings.HasPrefix(requestPath, prefix) {
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if len(requestPath) > len(prefix) && requestPath[len(prefix)] != '/' {
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continue
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}
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filePath := path.Join(staticDir, requestPath[len(prefix):])
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fileInfo, err := os.Stat(filePath)
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if err != nil {
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if RunMode == "dev" {
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Warn("Can't find the file:", filePath, err)
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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}
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//if the request is dir and DirectoryIndex is false then
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if fileInfo.IsDir() {
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if !DirectoryIndex {
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exception("403", ctx)
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return
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}
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if ctx.Input.Request.URL.Path[len(ctx.Input.Request.URL.Path)-1] != '/' {
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http.Redirect(ctx.ResponseWriter, ctx.Request, ctx.Input.Request.URL.Path+"/", 302)
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return
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}
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}
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if strings.HasSuffix(requestPath, "/index.html") {
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fileReader, err := os.Open(filePath)
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if err != nil {
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if RunMode == "dev" {
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Warn("Can't open the file:", filePath, err)
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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}
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defer fileReader.Close()
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http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, fileInfo.ModTime(), fileReader)
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return
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}
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isStaticFileToCompress := false
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for _, statExtension := range StaticExtensionsToGzip {
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if strings.HasSuffix(strings.ToLower(filePath), strings.ToLower(statExtension)) {
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isStaticFileToCompress = true
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break
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}
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}
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if !isStaticFileToCompress {
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http.ServeFile(ctx.ResponseWriter, ctx.Request, filePath)
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return
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}
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//to compress file
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var contentEncoding string
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if EnableGzip {
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contentEncoding = acceptencoder.ParseEncoding(ctx.Request)
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}
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memZipFile, err := openMemZipFile(filePath, contentEncoding)
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if err != nil {
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if RunMode == "dev" {
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Warn("Can't compress the file:", filePath, err)
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}
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http.NotFound(ctx.ResponseWriter, ctx.Request)
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return
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}
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if contentEncoding == "" {
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ctx.Output.Header("Content-Length", strconv.FormatInt(fileInfo.Size(), 10))
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} else {
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ctx.Output.Header("Content-Encoding", contentEncoding)
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}
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http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, fileInfo.ModTime(), memZipFile)
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return
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if !strings.Contains(requestPath, prefix) {
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continue
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}
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if len(requestPath) > len(prefix) && requestPath[len(prefix)] != '/' {
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continue
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}
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filePath := path.Join(staticDir, requestPath[len(prefix):])
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if fi, err := os.Stat(filePath); fi != nil {
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return filePath, fi, err
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}
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}
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return "", nil, notStaticRequestErr
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}
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func lookupFile(ctx *context.Context) (bool, string, os.FileInfo, error) {
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fp, fi, err := searchFile(ctx)
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if fp == "" || fi == nil {
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return false, "", nil, err
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}
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if !fi.IsDir() {
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return false, fp, fi, err
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}
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ifp := filepath.Join(fp, "index.html")
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if ifi, _ := os.Stat(ifp); ifi != nil && ifi.Mode().IsRegular() {
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return false, ifp, ifi, err
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}
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return !DirectoryIndex, fp, fi, err
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}
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