Merge pull request #1423 from JessonChan/fargo

fix the  accept encoding

context/acceptencoder.go

@@ -0,0 +1,133 @@
+// Copyright 2015 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package context
+
+import (
+	"bytes"
+	"compress/flate"
+	"compress/gzip"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+)
+
+type acceptEncoder struct {
+	name   string
+	encode func(io.Writer, int) (io.Writer, error)
+}
+
+var (
+	noneCompressEncoder    = acceptEncoder{"", func(wr io.Writer, level int) (io.Writer, error) { return wr, nil }}
+	gzipCompressEncoder    = acceptEncoder{"gzip", func(wr io.Writer, level int) (io.Writer, error) { return gzip.NewWriterLevel(wr, level) }}
+	deflateCompressEncoder = acceptEncoder{"deflate", func(wr io.Writer, level int) (io.Writer, error) { return flate.NewWriter(wr, level) }}
+)
+
+var (
+	encoderMap = map[string]acceptEncoder{ // all the other compress methods will ignore
+		"gzip":     gzipCompressEncoder,
+		"deflate":  deflateCompressEncoder,
+		"*":        gzipCompressEncoder, // * means any compress will accept,we prefer gzip
+		"identity": noneCompressEncoder, // identity means none-compress
+	}
+)
+
+// WriteFile reads from file and writes to writer by the specific encoding(gzip/deflate)
+func WriteFile(encoding string, writer io.Writer, file *os.File) (bool, string, error) {
+	return writeLevel(encoding, writer, file, flate.BestCompression)
+}
+
+// WriteBody reads  writes content to writer by the specific encoding(gzip/deflate)
+func WriteBody(encoding string, writer io.Writer, content []byte) (bool, string, error) {
+	return writeLevel(encoding, writer, bytes.NewReader(content), flate.BestSpeed)
+}
+
+// writeLevel reads from reader,writes to writer by specific encoding and compress level
+// the compress level is defined by deflate package
+func writeLevel(encoding string, writer io.Writer, reader io.Reader, level int) (bool, string, error) {
+	var outputWriter io.Writer
+	var err error
+	var ce = noneCompressEncoder
+
+	if cf, ok := encoderMap[encoding]; ok {
+		ce = cf
+	}
+	encoding = ce.name
+	outputWriter, err = ce.encode(writer, level)
+
+	if err != nil {
+		return false, "", err
+	}
+
+	_, err = io.Copy(outputWriter, reader)
+	if err != nil {
+		return false, "", err
+	}
+
+	switch outputWriter.(type) {
+	case io.WriteCloser:
+		outputWriter.(io.WriteCloser).Close()
+	}
+	return encoding != "", encoding, nil
+}
+
+// ParseEncoding will extract the right encoding for response
+// the Accept-Encoding's sec is here:
+// http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.3
+func ParseEncoding(r *http.Request) string {
+	if r == nil {
+		return ""
+	}
+	return parseEncoding(r)
+}
+
+type q struct {
+	name  string
+	value float64
+}
+
+func parseEncoding(r *http.Request) string {
+	acceptEncoding := r.Header.Get("Accept-Encoding")
+	if acceptEncoding == "" {
+		return ""
+	}
+	var lastQ q
+	for _, v := range strings.Split(acceptEncoding, ",") {
+		v = strings.TrimSpace(v)
+		if v == "" {
+			continue
+		}
+		vs := strings.Split(v, ";")
+		if len(vs) == 1 {
+			lastQ = q{vs[0], 1}
+			break
+		}
+		if len(vs) == 2 {
+			f, _ := strconv.ParseFloat(strings.Replace(vs[1], "q=", "", -1), 64)
+			if f == 0 {
+				continue
+			}
+			if f > lastQ.value {
+				lastQ = q{vs[0], f}
+			}
+		}
+	}
+	if cf, ok := encoderMap[lastQ.name]; ok {
+		return cf.name
+	} else {
+		return ""
+	}
+}

context/acceptencoder_test.go

@@ -0,0 +1,45 @@
+// Copyright 2015 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package context
+
+import (
+	"net/http"
+	"testing"
+)
+
+func Test_ExtractEncoding(t *testing.T) {
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"gzip,deflate"}}}) != "gzip" {
+		t.Fail()
+	}
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"deflate,gzip"}}}) != "deflate" {
+		t.Fail()
+	}
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"gzip;q=.5,deflate"}}}) != "deflate" {
+		t.Fail()
+	}
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"gzip;q=.5,deflate;q=0.3"}}}) != "gzip" {
+		t.Fail()
+	}
+
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"gzip;q=0,deflate"}}}) != "deflate" {
+		t.Fail()
+	}
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"deflate;q=0.5,gzip;q=0.5,identity"}}}) != "" {
+		t.Fail()
+	}
+	if parseEncoding(&http.Request{Header: map[string][]string{"Accept-Encoding": []string{"*"}}}) != "gzip" {
+		t.Fail()
+	}
+}

context/output.go

@@ -16,8 +16,6 @@ package context
 
 import (
 	"bytes"
-	"compress/flate"
-	"compress/gzip"
 	"encoding/json"
 	"encoding/xml"
 	"errors"
@@ -54,30 +52,16 @@ func (output *BeegoOutput) Header(key, val string) {
 // if EnableGzip, compress content string.
 // it sends out response body directly.
 func (output *BeegoOutput) Body(content []byte) {
-	outputWriter := output.Context.ResponseWriter.(io.Writer)
+	var encoding string
-	if output.EnableGzip == true && output.Context.Input.Header("Accept-Encoding") != "" {
+	var buf = &bytes.Buffer{}
-		splitted := strings.SplitN(output.Context.Input.Header("Accept-Encoding"), ",", -1)
+	if output.EnableGzip {
-		encodings := make([]string, len(splitted))
+		encoding = ParseEncoding(output.Context.Input.Request)
-
-		for i, val := range splitted {
-			encodings[i] = strings.TrimSpace(val)
-		}
-		for _, val := range encodings {
-			if val == "gzip" {
-				output.Header("Content-Encoding", "gzip")
-				outputWriter, _ = gzip.NewWriterLevel(output.Context.ResponseWriter, gzip.BestSpeed)
-
-				break
-			} else if val == "deflate" {
-				output.Header("Content-Encoding", "deflate")
-				outputWriter, _ = flate.NewWriter(output.Context.ResponseWriter, flate.BestSpeed)
-				break
-			}
 	}
+	if b, n, _ := WriteBody(encoding, buf, content); b {
+		output.Header("Content-Encoding", n)
 	} else {
 		output.Header("Content-Length", strconv.Itoa(len(content)))
 	}
-
 	// Write status code if it has been set manually
 	// Set it to 0 afterwards to prevent "multiple response.WriteHeader calls"
 	if output.Status != 0 {
@@ -85,13 +69,7 @@ func (output *BeegoOutput) Body(content []byte) {
 		output.Status = 0
 	}
 
-	outputWriter.Write(content)
+	io.Copy(output.Context.ResponseWriter, buf)
-	switch outputWriter.(type) {
-	case *gzip.Writer:
-		outputWriter.(*gzip.Writer).Close()
-	case *flate.Writer:
-		outputWriter.(*flate.Writer).Close()
-	}
 }
 
 // Cookie sets cookie value via given key.
@@ -102,25 +80,21 @@ func (output *BeegoOutput) Cookie(name string, value string, others ...interface
 
 	//fix cookie not work in IE
 	if len(others) > 0 {
+		var maxAge int64
+
 		switch v := others[0].(type) {
 		case int:
-			if v > 0 {
+			maxAge = int64(v)
-				fmt.Fprintf(&b, "; Expires=%s; Max-Age=%d", time.Now().Add(time.Duration(v)*time.Second).UTC().Format(time.RFC1123), v)
-			} else if v <= 0 {
-				fmt.Fprintf(&b, "; Max-Age=0")
-			}
-		case int64:
-			if v > 0 {
-				fmt.Fprintf(&b, "; Expires=%s; Max-Age=%d", time.Now().Add(time.Duration(v)*time.Second).UTC().Format(time.RFC1123), v)
-			} else if v <= 0 {
-				fmt.Fprintf(&b, "; Max-Age=0")
-			}
 		case int32:
-			if v > 0 {
+			maxAge = int64(v)
-				fmt.Fprintf(&b, "; Expires=%s; Max-Age=%d", time.Now().Add(time.Duration(v)*time.Second).UTC().Format(time.RFC1123), v)
+		case int64:
-			} else if v <= 0 {
+			maxAge = v
-				fmt.Fprintf(&b, "; Max-Age=0")
 		}
+
+		if maxAge > 0 {
+			fmt.Fprintf(&b, "; Expires=%s; Max-Age=%d", time.Now().Add(time.Duration(maxAge)*time.Second).UTC().Format(time.RFC1123), maxAge)
+		} else {
+			fmt.Fprintf(&b, "; Max-Age=0")
 		}
 	}
 

memzipfile.go

@@ -1,214 +0,0 @@
-// Copyright 2014 beego Author. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package beego
-
-import (
-	"bytes"
-	"compress/flate"
-	"compress/gzip"
-	"errors"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"strings"
-	"sync"
-	"time"
-)
-
-var (
-	menFileInfoMap = make(map[string]*memFileInfo)
-	lock           sync.RWMutex
-)
-
-// openMemZipFile returns MemFile object with a compressed static file.
-// it's used for serve static file if gzip enable.
-func openMemZipFile(path string, zip string) (*memFile, error) {
-	osFile, e := os.Open(path)
-	if e != nil {
-		return nil, e
-	}
-	defer osFile.Close()
-
-	osFileInfo, e := osFile.Stat()
-	if e != nil {
-		return nil, e
-	}
-
-	modTime := osFileInfo.ModTime()
-	fileSize := osFileInfo.Size()
-	lock.RLock()
-	cfi, ok := menFileInfoMap[zip+":"+path]
-	lock.RUnlock()
-	if !(ok && cfi.ModTime() == modTime && cfi.fileSize == fileSize) {
-		var content []byte
-		if zip == "gzip" {
-			var zipBuf bytes.Buffer
-			gzipWriter, e := gzip.NewWriterLevel(&zipBuf, gzip.BestCompression)
-			if e != nil {
-				return nil, e
-			}
-			_, e = io.Copy(gzipWriter, osFile)
-			gzipWriter.Close()
-			if e != nil {
-				return nil, e
-			}
-			content, e = ioutil.ReadAll(&zipBuf)
-			if e != nil {
-				return nil, e
-			}
-		} else if zip == "deflate" {
-			var zipBuf bytes.Buffer
-			deflateWriter, e := flate.NewWriter(&zipBuf, flate.BestCompression)
-			if e != nil {
-				return nil, e
-			}
-			_, e = io.Copy(deflateWriter, osFile)
-			deflateWriter.Close()
-			if e != nil {
-				return nil, e
-			}
-			content, e = ioutil.ReadAll(&zipBuf)
-			if e != nil {
-				return nil, e
-			}
-		} else {
-			content, e = ioutil.ReadAll(osFile)
-			if e != nil {
-				return nil, e
-			}
-		}
-
-		cfi = &memFileInfo{osFileInfo, modTime, content, int64(len(content)), fileSize}
-		lock.Lock()
-		defer lock.Unlock()
-		menFileInfoMap[zip+":"+path] = cfi
-	}
-	return &memFile{fi: cfi, offset: 0}, nil
-}
-
-// MemFileInfo contains a compressed file bytes and file information.
-// it implements os.FileInfo interface.
-type memFileInfo struct {
-	os.FileInfo
-	modTime     time.Time
-	content     []byte
-	contentSize int64
-	fileSize    int64
-}
-
-// Name returns the compressed filename.
-func (fi *memFileInfo) Name() string {
-	return fi.FileInfo.Name()
-}
-
-// Size returns the raw file content size, not compressed size.
-func (fi *memFileInfo) Size() int64 {
-	return fi.contentSize
-}
-
-// Mode returns file mode.
-func (fi *memFileInfo) Mode() os.FileMode {
-	return fi.FileInfo.Mode()
-}
-
-// ModTime returns the last modified time of raw file.
-func (fi *memFileInfo) ModTime() time.Time {
-	return fi.modTime
-}
-
-// IsDir returns the compressing file is a directory or not.
-func (fi *memFileInfo) IsDir() bool {
-	return fi.FileInfo.IsDir()
-}
-
-// return nil. implement the os.FileInfo interface method.
-func (fi *memFileInfo) Sys() interface{} {
-	return nil
-}
-
-// memFile contains MemFileInfo and bytes offset when reading.
-// it implements io.Reader,io.ReadCloser and io.Seeker.
-type memFile struct {
-	fi     *memFileInfo
-	offset int64
-}
-
-// Close memfile.
-func (f *memFile) Close() error {
-	return nil
-}
-
-// Get os.FileInfo of memfile.
-func (f *memFile) Stat() (os.FileInfo, error) {
-	return f.fi, nil
-}
-
-// read os.FileInfo of files in directory of memfile.
-// it returns empty slice.
-func (f *memFile) Readdir(count int) ([]os.FileInfo, error) {
-	infos := []os.FileInfo{}
-
-	return infos, nil
-}
-
-// Read bytes from the compressed file bytes.
-func (f *memFile) Read(p []byte) (n int, err error) {
-	if len(f.fi.content)-int(f.offset) >= len(p) {
-		n = len(p)
-	} else {
-		n = len(f.fi.content) - int(f.offset)
-		err = io.EOF
-	}
-	copy(p, f.fi.content[f.offset:f.offset+int64(n)])
-	f.offset += int64(n)
-	return
-}
-
-var errWhence = errors.New("Seek: invalid whence")
-var errOffset = errors.New("Seek: invalid offset")
-
-// Read bytes from the compressed file bytes by seeker.
-func (f *memFile) Seek(offset int64, whence int) (ret int64, err error) {
-	switch whence {
-	default:
-		return 0, errWhence
-	case os.SEEK_SET:
-	case os.SEEK_CUR:
-		offset += f.offset
-	case os.SEEK_END:
-		offset += int64(len(f.fi.content))
-	}
-	if offset < 0 || int(offset) > len(f.fi.content) {
-		return 0, errOffset
-	}
-	f.offset = offset
-	return f.offset, nil
-}
-
-// getAcceptEncodingZip returns accept encoding format in http header.
-// zip is first, then deflate if both accepted.
-// If no accepted, return empty string.
-func getAcceptEncodingZip(r *http.Request) string {
-	ss := r.Header.Get("Accept-Encoding")
-	ss = strings.ToLower(ss)
-	if strings.Contains(ss, "gzip") {
-		return "gzip"
-	} else if strings.Contains(ss, "deflate") {
-		return "deflate"
-	} else {
-		return ""
-	}
-}

router.go

@@ -717,18 +717,18 @@ func (p *ControllerRegister) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 		if doFilter(BeforeExec) {
 			goto Admin
 		}
-		isRunable := false
+		isRunnable := false
 		if routerInfo != nil {
 			if routerInfo.routerType == routerTypeRESTFul {
 				if _, ok := routerInfo.methods[r.Method]; ok {
-					isRunable = true
+					isRunnable = true
 					routerInfo.runFunction(context)
 				} else {
 					exception("405", context)
 					goto Admin
 				}
 			} else if routerInfo.routerType == routerTypeHandler {
-				isRunable = true
+				isRunnable = true
 				routerInfo.handler.ServeHTTP(rw, r)
 			} else {
 				runrouter = routerInfo.controllerType
@@ -750,7 +750,7 @@ func (p *ControllerRegister) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 		}
 
 		// also defined runrouter & runMethod from filter
-		if !isRunable {
+		if !isRunnable {
 			//Invoke the request handler
 			vc := reflect.New(runrouter)
 			execController, ok := vc.Interface().(ControllerInterface)

staticfile.go

@@ -15,106 +15,58 @@
 package beego
 
 import (
+	"bytes"
 	"net/http"
 	"os"
 	"path"
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync"
+
+	"errors"
+
+	"time"
 
 	"github.com/astaxie/beego/context"
-	"github.com/astaxie/beego/utils"
 )
 
+var notStaticRequestErr = errors.New("request not a static file request")
+
 func serverStaticRouter(ctx *context.Context) {
 	if ctx.Input.Method() != "GET" && ctx.Input.Method() != "HEAD" {
 		return
 	}
-	requestPath := filepath.Clean(ctx.Input.Request.URL.Path)
 
-	// special processing : favicon.ico/robots.txt  can be in any static dir
+	forbidden, filePath, fileInfo, err := lookupFile(ctx)
-	if requestPath == "/favicon.ico" || requestPath == "/robots.txt" {
+	if err == notStaticRequestErr {
-		file := path.Join(".", requestPath)
-		if utils.FileExists(file) {
-			http.ServeFile(ctx.ResponseWriter, ctx.Request, file)
 		return
 	}
 
-		for _, staticDir := range StaticDir {
+	if forbidden {
-			file := path.Join(staticDir, requestPath)
-			if utils.FileExists(file) {
-				http.ServeFile(ctx.ResponseWriter, ctx.Request, file)
-				return
-			}
-		}
-
-		http.NotFound(ctx.ResponseWriter, ctx.Request)
-		return
-	}
-
-	for prefix, staticDir := range StaticDir {
-		if len(prefix) == 0 {
-			continue
-		}
-		if strings.HasPrefix(requestPath, prefix) {
-			if len(requestPath) > len(prefix) && requestPath[len(prefix)] != '/' {
-				continue
-			}
-			filePath := path.Join(staticDir, requestPath[len(prefix):])
-			fileInfo, err := os.Stat(filePath)
-			if err != nil {
-				if RunMode == "dev" {
-					Warn("Can't find the file:", filePath, err)
-				}
-				http.NotFound(ctx.ResponseWriter, ctx.Request)
-				return
-			}
-			//if the request is dir and DirectoryIndex is false then
-			if fileInfo.IsDir() {
-				if !DirectoryIndex {
 		exception("403", ctx)
 		return
 	}
-				if ctx.Input.Request.URL.Path[len(ctx.Input.Request.URL.Path)-1] != '/' {
-					http.Redirect(ctx.ResponseWriter, ctx.Request, ctx.Input.Request.URL.Path+"/", 302)
-					return
-				}
-			}
 
-			if strings.HasSuffix(requestPath, "/index.html") {
+	if filePath == "" || fileInfo == nil {
-				fileReader, err := os.Open(filePath)
-				if err != nil {
 		if RunMode == "dev" {
-						Warn("Can't open the file:", filePath, err)
+			Warn("Can't find/open the file:", filePath, err)
 		}
 		http.NotFound(ctx.ResponseWriter, ctx.Request)
 		return
 	}
-				defer fileReader.Close()
+	if fileInfo.IsDir() {
-				http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, fileInfo.ModTime(), fileReader)
+		//serveFile will list dir
-				return
-			}
-
-			isStaticFileToCompress := false
-			for _, statExtension := range StaticExtensionsToGzip {
-				if strings.HasSuffix(strings.ToLower(filePath), strings.ToLower(statExtension)) {
-					isStaticFileToCompress = true
-					break
-				}
-			}
-
-			if !isStaticFileToCompress {
 		http.ServeFile(ctx.ResponseWriter, ctx.Request, filePath)
 		return
 	}
 
-			//to compress file
+	var enableCompress = EnableGzip && isStaticCompress(filePath)
-			var contentEncoding string
+	var acceptEncoding string
-			if EnableGzip {
+	if enableCompress {
-				contentEncoding = getAcceptEncodingZip(ctx.Request)
+		acceptEncoding = context.ParseEncoding(ctx.Request)
 	}
-
+	b, n, sch, err := openFile(filePath, fileInfo, acceptEncoding)
-			memZipFile, err := openMemZipFile(filePath, contentEncoding)
 	if err != nil {
 		if RunMode == "dev" {
 			Warn("Can't compress the file:", filePath, err)
@@ -123,16 +75,123 @@ func serverStaticRouter(ctx *context.Context) {
 		return
 	}
 
-			if contentEncoding == "gzip" {
+	if b {
-				ctx.Output.Header("Content-Encoding", "gzip")
+		ctx.Output.Header("Content-Encoding", n)
-			} else if contentEncoding == "deflate" {
-				ctx.Output.Header("Content-Encoding", "deflate")
 	} else {
-				ctx.Output.Header("Content-Length", strconv.FormatInt(fileInfo.Size(), 10))
+		ctx.Output.Header("Content-Length", strconv.FormatInt(sch.size, 10))
 	}
 
-			http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, fileInfo.ModTime(), memZipFile)
+	http.ServeContent(ctx.ResponseWriter, ctx.Request, filePath, sch.modTime, sch)
 	return
-		}
+
-	}
+}
+
+type serveContentHolder struct {
+	*bytes.Reader
+	modTime  time.Time
+	size     int64
+	encoding string
+}
+
+var (
+	staticFileMap = make(map[string]*serveContentHolder)
+	mapLock       sync.Mutex
+)
+
+func openFile(filePath string, fi os.FileInfo, acceptEncoding string) (bool, string, *serveContentHolder, error) {
+	mapKey := acceptEncoding + ":" + filePath
+	mapFile, _ := staticFileMap[mapKey]
+	if isOk(mapFile, fi) {
+		return mapFile.encoding != "", mapFile.encoding, mapFile, nil
+	}
+	mapLock.Lock()
+	defer mapLock.Unlock()
+	if mapFile, _ = staticFileMap[mapKey]; !isOk(mapFile, fi) {
+		file, err := os.Open(filePath)
+		if err != nil {
+			return false, "", nil, err
+		}
+		defer file.Close()
+		var bufferWriter bytes.Buffer
+		_, n, err := context.WriteFile(acceptEncoding, &bufferWriter, file)
+		if err != nil {
+			return false, "", nil, err
+		}
+		mapFile = &serveContentHolder{Reader: bytes.NewReader(bufferWriter.Bytes()), modTime: fi.ModTime(), size: int64(bufferWriter.Len()), encoding: n}
+		staticFileMap[mapKey] = mapFile
+	}
+
+	return mapFile.encoding != "", mapFile.encoding, mapFile, nil
+}
+
+func isOk(s *serveContentHolder, fi os.FileInfo) bool {
+	if s == nil {
+		return false
+	}
+	return s.modTime == fi.ModTime() && s.size == fi.Size()
+}
+
+// isStaticCompress detect static files
+func isStaticCompress(filePath string) bool {
+	for _, statExtension := range StaticExtensionsToGzip {
+		if strings.HasSuffix(strings.ToLower(filePath), strings.ToLower(statExtension)) {
+			return true
+		}
+	}
+	return false
+}
+
+// searchFile search the file by url path
+// if none the static file prefix matches ,return notStaticRequestErr
+func searchFile(ctx *context.Context) (string, os.FileInfo, error) {
+	requestPath := filepath.Clean(ctx.Input.Request.URL.Path)
+	// special processing : favicon.ico/robots.txt  can be in any static dir
+	if requestPath == "/favicon.ico" || requestPath == "/robots.txt" {
+		file := path.Join(".", requestPath)
+		if fi, _ := os.Stat(file); fi != nil {
+			return file, fi, nil
+		}
+		for _, staticDir := range StaticDir {
+			filePath := path.Join(staticDir, requestPath)
+			if fi, _ := os.Stat(filePath); fi != nil {
+				return filePath, fi, nil
+			}
+		}
+		return "", nil, errors.New(requestPath + " file not find")
+	}
+
+	for prefix, staticDir := range StaticDir {
+		if len(prefix) == 0 {
+			continue
+		}
+		if !strings.Contains(requestPath, prefix) {
+			continue
+		}
+		if len(requestPath) > len(prefix) && requestPath[len(prefix)] != '/' {
+			continue
+		}
+		filePath := path.Join(staticDir, requestPath[len(prefix):])
+		if fi, err := os.Stat(filePath); fi != nil {
+			return filePath, fi, err
+		}
+	}
+	return "", nil, notStaticRequestErr
+}
+
+// lookupFile find the file to serve
+// if the file is dir ,search the index.html as default file( MUST NOT A DIR also)
+// if the index.html not exist or is a dir, give a forbidden response depending on  DirectoryIndex
+func lookupFile(ctx *context.Context) (bool, string, os.FileInfo, error) {
+	fp, fi, err := searchFile(ctx)
+	if fp == "" || fi == nil {
+		return false, "", nil, err
+	}
+	if !fi.IsDir() {
+		return false, fp, fi, err
+	}
+	ifp := filepath.Join(fp, "index.html")
+	if ifi, _ := os.Stat(ifp); ifi != nil && ifi.Mode().IsRegular() {
+		return false, ifp, ifi, err
+	}
+	return !DirectoryIndex, fp, fi, err
 }

staticfile_test.go

@@ -0,0 +1,71 @@
+package beego
+
+import (
+	"bytes"
+	"compress/flate"
+	"compress/gzip"
+	"io"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+const licenseFile = "./LICENSE"
+
+func testOpenFile(encoding string, content []byte, t *testing.T) {
+	fi, _ := os.Stat(licenseFile)
+	b, n, sch, err := openFile(licenseFile, fi, encoding)
+	if err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+
+	t.Log("open static file encoding "+n, b)
+
+	assetOpenFileAndContent(sch, content, t)
+}
+func TestOpenStaticFile_1(t *testing.T) {
+	file, _ := os.Open(licenseFile)
+	content, _ := ioutil.ReadAll(file)
+	testOpenFile("", content, t)
+}
+
+func TestOpenStaticFileGzip_1(t *testing.T) {
+	file, _ := os.Open(licenseFile)
+	var zipBuf bytes.Buffer
+	fileWriter, _ := gzip.NewWriterLevel(&zipBuf, gzip.BestCompression)
+	io.Copy(fileWriter, file)
+	fileWriter.Close()
+	content, _ := ioutil.ReadAll(&zipBuf)
+
+	testOpenFile("gzip", content, t)
+}
+func TestOpenStaticFileDeflate_1(t *testing.T) {
+	file, _ := os.Open(licenseFile)
+	var zipBuf bytes.Buffer
+	fileWriter, _ := flate.NewWriter(&zipBuf, flate.BestCompression)
+	io.Copy(fileWriter, file)
+	fileWriter.Close()
+	content, _ := ioutil.ReadAll(&zipBuf)
+
+	testOpenFile("deflate", content, t)
+}
+
+func assetOpenFileAndContent(sch *serveContentHolder, content []byte, t *testing.T) {
+	t.Log(sch.size, len(content))
+	if sch.size != int64(len(content)) {
+		t.Log("static content file size not same")
+		t.Fail()
+	}
+	bs, _ := ioutil.ReadAll(sch)
+	for i, v := range content {
+		if v != bs[i] {
+			t.Log("content not same")
+			t.Fail()
+		}
+	}
+	if len(staticFileMap) == 0 {
+		t.Log("men map is empty")
+		t.Fail()
+	}
+}