directory structure change to work with glide

glide has its own requirements. My previous workaround caused me some
code checkin errors. Need to fix this.

weed/server/common.go

@@ -0,0 +1,179 @@
+package weed_server
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/stats"
+	"github.com/chrislusf/seaweedfs/weed/storage"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+var serverStats *stats.ServerStats
+var startTime = time.Now()
+
+func init() {
+	serverStats = stats.NewServerStats()
+	go serverStats.Start()
+
+}
+
+func writeJson(w http.ResponseWriter, r *http.Request, httpStatus int, obj interface{}) (err error) {
+	var bytes []byte
+	if r.FormValue("pretty") != "" {
+		bytes, err = json.MarshalIndent(obj, "", "  ")
+	} else {
+		bytes, err = json.Marshal(obj)
+	}
+	if err != nil {
+		return
+	}
+	callback := r.FormValue("callback")
+	if callback == "" {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(httpStatus)
+		_, err = w.Write(bytes)
+	} else {
+		w.Header().Set("Content-Type", "application/javascript")
+		w.WriteHeader(httpStatus)
+		if _, err = w.Write([]uint8(callback)); err != nil {
+			return
+		}
+		if _, err = w.Write([]uint8("(")); err != nil {
+			return
+		}
+		fmt.Fprint(w, string(bytes))
+		if _, err = w.Write([]uint8(")")); err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+// wrapper for writeJson - just logs errors
+func writeJsonQuiet(w http.ResponseWriter, r *http.Request, httpStatus int, obj interface{}) {
+	if err := writeJson(w, r, httpStatus, obj); err != nil {
+		glog.V(0).Infof("error writing JSON %s: %v", obj, err)
+	}
+}
+func writeJsonError(w http.ResponseWriter, r *http.Request, httpStatus int, err error) {
+	m := make(map[string]interface{})
+	m["error"] = err.Error()
+	writeJsonQuiet(w, r, httpStatus, m)
+}
+
+func debug(params ...interface{}) {
+	glog.V(4).Infoln(params)
+}
+
+func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
+	jwt := security.GetJwt(r)
+	m := make(map[string]interface{})
+	if r.Method != "POST" {
+		writeJsonError(w, r, http.StatusMethodNotAllowed, errors.New("Only submit via POST!"))
+		return
+	}
+
+	debug("parsing upload file...")
+	fname, data, mimeType, isGzipped, lastModified, _, _, pe := storage.ParseUpload(r)
+	if pe != nil {
+		writeJsonError(w, r, http.StatusBadRequest, pe)
+		return
+	}
+
+	debug("assigning file id for", fname)
+	r.ParseForm()
+	assignResult, ae := operation.Assign(masterUrl, 1, r.FormValue("replication"), r.FormValue("collection"), r.FormValue("ttl"))
+	if ae != nil {
+		writeJsonError(w, r, http.StatusInternalServerError, ae)
+		return
+	}
+
+	url := "http://" + assignResult.Url + "/" + assignResult.Fid
+	if lastModified != 0 {
+		url = url + "?ts=" + strconv.FormatUint(lastModified, 10)
+	}
+
+	debug("upload file to store", url)
+	uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType, jwt)
+	if err != nil {
+		writeJsonError(w, r, http.StatusInternalServerError, err)
+		return
+	}
+
+	m["fileName"] = fname
+	m["fid"] = assignResult.Fid
+	m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid
+	m["size"] = uploadResult.Size
+	writeJsonQuiet(w, r, http.StatusCreated, m)
+	return
+}
+
+func deleteForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
+	r.ParseForm()
+	fids := r.Form["fid"]
+	ret, err := operation.DeleteFiles(masterUrl, fids)
+	if err != nil {
+		writeJsonError(w, r, http.StatusInternalServerError, err)
+		return
+	}
+	writeJsonQuiet(w, r, http.StatusAccepted, ret)
+}
+
+func parseURLPath(path string) (vid, fid, filename, ext string, isVolumeIdOnly bool) {
+	switch strings.Count(path, "/") {
+	case 3:
+		parts := strings.Split(path, "/")
+		vid, fid, filename = parts[1], parts[2], parts[3]
+		ext = filepath.Ext(filename)
+	case 2:
+		parts := strings.Split(path, "/")
+		vid, fid = parts[1], parts[2]
+		dotIndex := strings.LastIndex(fid, ".")
+		if dotIndex > 0 {
+			ext = fid[dotIndex:]
+			fid = fid[0:dotIndex]
+		}
+	default:
+		sepIndex := strings.LastIndex(path, "/")
+		commaIndex := strings.LastIndex(path[sepIndex:], ",")
+		if commaIndex <= 0 {
+			vid, isVolumeIdOnly = path[sepIndex+1:], true
+			return
+		}
+		dotIndex := strings.LastIndex(path[sepIndex:], ".")
+		vid = path[sepIndex+1 : commaIndex]
+		fid = path[commaIndex+1:]
+		ext = ""
+		if dotIndex > 0 {
+			fid = path[commaIndex+1 : dotIndex]
+			ext = path[dotIndex:]
+		}
+	}
+	return
+}
+
+func statsCounterHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	m["Version"] = util.VERSION
+	m["Counters"] = serverStats
+	writeJsonQuiet(w, r, http.StatusOK, m)
+}
+
+func statsMemoryHandler(w http.ResponseWriter, r *http.Request) {
+	m := make(map[string]interface{})
+	m["Version"] = util.VERSION
+	m["Memory"] = stats.MemStat()
+	writeJsonQuiet(w, r, http.StatusOK, m)
+}