Add filer option to redirect instead of proxying to volume server on file GET requests.

go/weed/weed_server/filer_server.go

@@ -9,17 +9,23 @@ import (
 )
 
 type FilerServer struct {
-	port       string
-	master     string
-	collection string
-	filer      filer.Filer
+	port               string
+	master             string
+	collection         string
+	defaultReplication string
+	redirectOnRead     bool
+	filer              filer.Filer
 }
 
-func NewFilerServer(r *http.ServeMux, port int, master string, dir string, collection string) (fs *FilerServer, err error) {
+func NewFilerServer(r *http.ServeMux, port int, master string, dir string, collection string,
+	replication string, redirectOnRead bool,
+) (fs *FilerServer, err error) {
 	fs = &FilerServer{
-		master:     master,
-		collection: collection,
-		port:       ":" + strconv.Itoa(port),
+		master:             master,
+		collection:         collection,
+		defaultReplication: replication,
+		redirectOnRead:     redirectOnRead,
+		port:               ":" + strconv.Itoa(port),
 	}
 
 	if fs.filer, err = filer.NewFilerEmbedded(master, dir); err != nil {

go/weed/weed_server/filer_server_handlers.go

@@ -81,7 +81,11 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 		return
 	}
 	urlLocation := lookup.Locations[rand.Intn(len(lookup.Locations))].PublicUrl
-	u, _ := url.Parse("http://" + urlLocation + "/" + fileId)
+	urlString := "http://" + urlLocation + "/" + fileId
+	if fs.redirectOnRead {
+
+	}
+	u, _ := url.Parse(urlString)
 	request := &http.Request{
 		Method:        r.Method,
 		URL:           u,
@@ -110,7 +114,11 @@ func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request,
 
 func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
 	query := r.URL.Query()
-	assignResult, ae := operation.Assign(fs.master, 1, query.Get("replication"), fs.collection, query.Get("ttl"))
+	replication := query.Get("replication")
+	if replication == "" {
+		replication = fs.defaultReplication
+	}
+	assignResult, ae := operation.Assign(fs.master, 1, replication, fs.collection, query.Get("ttl"))
 	if ae != nil {
 		glog.V(0).Infoln("failing to assign a file id", ae.Error())
 		writeJsonError(w, r, ae)