Add ETag header to avatars (#721)

vendor/gopkg.in/macaron.v1/macaron.go

@@ -32,7 +32,7 @@ import (
 	"github.com/go-macaron/inject"
 )
 
-const _VERSION = "1.1.8.0826"
+const _VERSION = "1.1.12.0122"
 
 func Version() string {
 	return _VERSION

vendor/gopkg.in/macaron.v1/render.go

@@ -21,6 +21,7 @@ import (
 	"encoding/xml"
 	"fmt"
 	"html/template"
+	"io"
 	"io/ioutil"
 	"net/http"
 	"os"
@@ -72,6 +73,7 @@ type (
 	// TemplateFileSystem represents a interface of template file system that able to list all files.
 	TemplateFileSystem interface {
 		ListFiles() []TemplateFile
+		Get(string) (io.Reader, error)
 	}
 
 	// Delims represents a set of Left and Right delimiters for HTML template rendering
@@ -246,6 +248,15 @@ func (fs TplFileSystem) ListFiles() []TemplateFile {
 	return fs.files
 }
 
+func (fs TplFileSystem) Get(name string) (io.Reader, error) {
+	for i := range fs.files {
+		if fs.files[i].Name()+fs.files[i].Ext() == name {
+			return bytes.NewReader(fs.files[i].Data()), nil
+		}
+	}
+	return nil, fmt.Errorf("file '%s' not found", name)
+}
+
 func PrepareCharset(charset string) string {
 	if len(charset) != 0 {
 		return "; charset=" + charset

vendor/gopkg.in/macaron.v1/router.go

@@ -258,7 +258,9 @@ func (r *Router) NotFound(handlers ...Handler) {
 	validateHandlers(handlers)
 	r.notFound = func(rw http.ResponseWriter, req *http.Request) {
 		c := r.m.createContext(rw, req)
-		c.handlers = append(r.m.handlers, handlers...)
+		c.handlers = make([]Handler, 0, len(r.m.handlers)+len(handlers))
+		c.handlers = append(c.handlers, r.m.handlers...)
+		c.handlers = append(c.handlers, handlers...)
 		c.run()
 	}
 }

vendor/gopkg.in/macaron.v1/static.go

@@ -16,6 +16,7 @@
 package macaron
 
 import (
+	"encoding/base64"
 	"log"
 	"net/http"
 	"path"
@@ -35,6 +36,9 @@ type StaticOptions struct {
 	// 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
+	// ETag defines if we should add an ETag header
+	// https://developers.google.com/web/fundamentals/performance/optimizing-content-efficiency/http-caching#validating-cached-responses-with-etags
+	ETag bool
 	// FileSystem is the interface for supporting any implmentation of file system.
 	FileSystem http.FileSystem
 }
@@ -172,10 +176,21 @@ func staticHandler(ctx *Context, log *log.Logger, opt StaticOptions) bool {
 		ctx.Resp.Header().Set("Expires", opt.Expires())
 	}
 
+	if opt.ETag {
+		tag := GenerateETag(string(fi.Size()), fi.Name(), fi.ModTime().UTC().Format(http.TimeFormat))
+		ctx.Resp.Header().Set("ETag", tag)
+	}
+
 	http.ServeContent(ctx.Resp, ctx.Req.Request, file, fi.ModTime(), f)
 	return true
 }
 
+// GenerateETag generates an ETag based on size, filename and file modification time
+func GenerateETag(fileSize, fileName, modTime string) string {
+	etag := fileSize + fileName + modTime
+	return base64.StdEncoding.EncodeToString([]byte(etag))
+}
+
 // Static returns a middleware handler that serves static files in the given directory.
 func Static(directory string, staticOpt ...StaticOptions) Handler {
 	opt := prepareStaticOptions(directory, staticOpt)