/usr/share/gocode/src/gopkg.in/macaron.v1/static.go is in golang-gopkg-macaron.v1-dev 1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | // Copyright 2013 Martini Authors
// Copyright 2014 The Macaron Authors
//
// 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 macaron
import (
"log"
"net/http"
"path"
"path/filepath"
"strings"
"sync"
)
// StaticOptions is a struct for specifying configuration options for the macaron.Static middleware.
type StaticOptions struct {
// Prefix is the optional prefix used to serve the static directory content
Prefix string
// SkipLogging will disable [Static] log messages when a static file is served.
SkipLogging bool
// IndexFile defines which file to serve as index if it exists.
IndexFile string
// Expires defines which user-defined function to use for producing a HTTP Expires Header
// https://developers.google.com/speed/docs/insights/LeverageBrowserCaching
Expires func() string
// FileSystem is the interface for supporting any implmentation of file system.
FileSystem http.FileSystem
}
// FIXME: to be deleted.
type staticMap struct {
lock sync.RWMutex
data map[string]*http.Dir
}
func (sm *staticMap) Set(dir *http.Dir) {
sm.lock.Lock()
defer sm.lock.Unlock()
sm.data[string(*dir)] = dir
}
func (sm *staticMap) Get(name string) *http.Dir {
sm.lock.RLock()
defer sm.lock.RUnlock()
return sm.data[name]
}
func (sm *staticMap) Delete(name string) {
sm.lock.Lock()
defer sm.lock.Unlock()
delete(sm.data, name)
}
var statics = staticMap{sync.RWMutex{}, map[string]*http.Dir{}}
// staticFileSystem implements http.FileSystem interface.
type staticFileSystem struct {
dir *http.Dir
}
func newStaticFileSystem(directory string) staticFileSystem {
if !filepath.IsAbs(directory) {
directory = filepath.Join(Root, directory)
}
dir := http.Dir(directory)
statics.Set(&dir)
return staticFileSystem{&dir}
}
func (fs staticFileSystem) Open(name string) (http.File, error) {
return fs.dir.Open(name)
}
func prepareStaticOption(dir string, opt StaticOptions) StaticOptions {
// Defaults
if len(opt.IndexFile) == 0 {
opt.IndexFile = "index.html"
}
// Normalize the prefix if provided
if opt.Prefix != "" {
// Ensure we have a leading '/'
if opt.Prefix[0] != '/' {
opt.Prefix = "/" + opt.Prefix
}
// Remove any trailing '/'
opt.Prefix = strings.TrimRight(opt.Prefix, "/")
}
if opt.FileSystem == nil {
opt.FileSystem = newStaticFileSystem(dir)
}
return opt
}
func prepareStaticOptions(dir string, options []StaticOptions) StaticOptions {
var opt StaticOptions
if len(options) > 0 {
opt = options[0]
}
return prepareStaticOption(dir, opt)
}
func staticHandler(ctx *Context, log *log.Logger, opt StaticOptions) bool {
if ctx.Req.Method != "GET" && ctx.Req.Method != "HEAD" {
return false
}
file := ctx.Req.URL.Path
// if we have a prefix, filter requests by stripping the prefix
if opt.Prefix != "" {
if !strings.HasPrefix(file, opt.Prefix) {
return false
}
file = file[len(opt.Prefix):]
if file != "" && file[0] != '/' {
return false
}
}
f, err := opt.FileSystem.Open(file)
if err != nil {
return false
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return true // File exists but fail to open.
}
// Try to serve index file
if fi.IsDir() {
// Redirect if missing trailing slash.
if !strings.HasSuffix(ctx.Req.URL.Path, "/") {
http.Redirect(ctx.Resp, ctx.Req.Request, ctx.Req.URL.Path+"/", http.StatusFound)
return true
}
file = path.Join(file, opt.IndexFile)
f, err = opt.FileSystem.Open(file)
if err != nil {
return false // Discard error.
}
defer f.Close()
fi, err = f.Stat()
if err != nil || fi.IsDir() {
return true
}
}
if !opt.SkipLogging {
log.Println("[Static] Serving " + file)
}
// Add an Expires header to the static content
if opt.Expires != nil {
ctx.Resp.Header().Set("Expires", opt.Expires())
}
http.ServeContent(ctx.Resp, ctx.Req.Request, file, fi.ModTime(), f)
return true
}
// Static returns a middleware handler that serves static files in the given directory.
func Static(directory string, staticOpt ...StaticOptions) Handler {
opt := prepareStaticOptions(directory, staticOpt)
return func(ctx *Context, log *log.Logger) {
staticHandler(ctx, log, opt)
}
}
// Statics registers multiple static middleware handlers all at once.
func Statics(opt StaticOptions, dirs ...string) Handler {
if len(dirs) == 0 {
panic("no static directory is given")
}
opts := make([]StaticOptions, len(dirs))
for i := range dirs {
opts[i] = prepareStaticOption(dirs[i], opt)
}
return func(ctx *Context, log *log.Logger) {
for i := range opts {
if staticHandler(ctx, log, opts[i]) {
return
}
}
}
}
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