Added jquery file upload plugin: https://github.com/blueimp/jQuery-File-Upload

1 files changed, 361 insertions, 0 deletions

diff --git a/vendors/jquery-file-upload/server/gae-go/app/main.go b/vendors/jquery-file-upload/server/gae-go/app/main.go
new file mode 100644
index 000000000..01dc2f204
--- /dev/null
+++ b/vendors/jquery-file-upload/server/gae-go/app/main.go
@@ -0,0 +1,361 @@
+/*
+ * jQuery File Upload Plugin GAE Go Example 2.0
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * http://www.opensource.org/licenses/MIT
+ */
+
+package app
+
+import (
+	"appengine"
+	"appengine/blobstore"
+	"appengine/memcache"
+	"appengine/taskqueue"
+	"bytes"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"image"
+	"image/png"
+	"io"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"regexp"
+	"resize"
+	"strings"
+	"time"
+)
+
+import _ "image/gif"
+import _ "image/jpeg"
+
+const (
+	WEBSITE              = "http://blueimp.github.com/jQuery-File-Upload/"
+	MIN_FILE_SIZE        = 1       // bytes
+	MAX_FILE_SIZE        = 5000000 // bytes
+	IMAGE_TYPES          = "image/(gif|p?jpeg|(x-)?png)"
+	ACCEPT_FILE_TYPES    = IMAGE_TYPES
+	EXPIRATION_TIME      = 300 // seconds
+	THUMBNAIL_MAX_WIDTH  = 80
+	THUMBNAIL_MAX_HEIGHT = THUMBNAIL_MAX_WIDTH
+)
+
+var (
+	imageTypes      = regexp.MustCompile(IMAGE_TYPES)
+	acceptFileTypes = regexp.MustCompile(ACCEPT_FILE_TYPES)
+)
+
+type FileInfo struct {
+	Key          appengine.BlobKey `json:"-"`
+	Url          string            `json:"url,omitempty"`
+	ThumbnailUrl string            `json:"thumbnail_url,omitempty"`
+	Name         string            `json:"name"`
+	Type         string            `json:"type"`
+	Size         int64             `json:"size"`
+	Error        string            `json:"error,omitempty"`
+	DeleteUrl    string            `json:"delete_url,omitempty"`
+	DeleteType   string            `json:"delete_type,omitempty"`
+}
+
+func (fi *FileInfo) ValidateType() (valid bool) {
+	if acceptFileTypes.MatchString(fi.Type) {
+		return true
+	}
+	fi.Error = "acceptFileTypes"
+	return false
+}
+
+func (fi *FileInfo) ValidateSize() (valid bool) {
+	if fi.Size < MIN_FILE_SIZE {
+		fi.Error = "minFileSize"
+	} else if fi.Size > MAX_FILE_SIZE {
+		fi.Error = "maxFileSize"
+	} else {
+		return true
+	}
+	return false
+}
+
+func (fi *FileInfo) CreateUrls(r *http.Request, c appengine.Context) {
+	u := &url.URL{
+		Scheme: r.URL.Scheme,
+		Host:   appengine.DefaultVersionHostname(c),
+		Path:   "/",
+	}
+	uString := u.String()
+	fi.Url = uString + escape(string(fi.Key)) + "/" +
+		escape(string(fi.Name))
+	fi.DeleteUrl = fi.Url
+	fi.DeleteType = "DELETE"
+	if fi.ThumbnailUrl != "" && -1 == strings.Index(
+		r.Header.Get("Accept"),
+		"application/json",
+	) {
+		fi.ThumbnailUrl = uString + "thumbnails/" +
+			escape(string(fi.Key))
+	}
+}
+
+func (fi *FileInfo) CreateThumbnail(r io.Reader, c appengine.Context) (data []byte, err error) {
+	defer func() {
+		if rec := recover(); rec != nil {
+			log.Println(rec)
+			// 1x1 pixel transparent GIf, bas64 encoded:
+			s := "R0lGODlhAQABAIAAAP///////yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="
+			data, _ = base64.StdEncoding.DecodeString(s)
+			fi.ThumbnailUrl = "data:image/gif;base64," + s
+		}
+		memcache.Add(c, &memcache.Item{
+			Key:        string(fi.Key),
+			Value:      data,
+			Expiration: EXPIRATION_TIME,
+		})
+	}()
+	img, _, err := image.Decode(r)
+	check(err)
+	if bounds := img.Bounds(); bounds.Dx() > THUMBNAIL_MAX_WIDTH ||
+		bounds.Dy() > THUMBNAIL_MAX_HEIGHT {
+		w, h := THUMBNAIL_MAX_WIDTH, THUMBNAIL_MAX_HEIGHT
+		if bounds.Dx() > bounds.Dy() {
+			h = bounds.Dy() * h / bounds.Dx()
+		} else {
+			w = bounds.Dx() * w / bounds.Dy()
+		}
+		img = resize.Resize(img, img.Bounds(), w, h)
+	}
+	var b bytes.Buffer
+	err = png.Encode(&b, img)
+	check(err)
+	data = b.Bytes()
+	fi.ThumbnailUrl = "data:image/png;base64," +
+		base64.StdEncoding.EncodeToString(data)
+	return
+}
+
+func check(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+func escape(s string) string {
+	return strings.Replace(url.QueryEscape(s), "+", "%20", -1)
+}
+
+func delayedDelete(c appengine.Context, fi *FileInfo) {
+	if key := string(fi.Key); key != "" {
+		task := &taskqueue.Task{
+			Path:   "/" + escape(key) + "/-",
+			Method: "DELETE",
+			Delay:  time.Duration(EXPIRATION_TIME) * time.Second,
+		}
+		taskqueue.Add(c, task, "")
+	}
+}
+
+func handleUpload(r *http.Request, p *multipart.Part) (fi *FileInfo) {
+	fi = &FileInfo{
+		Name: p.FileName(),
+		Type: p.Header.Get("Content-Type"),
+	}
+	if !fi.ValidateType() {
+		return
+	}
+	defer func() {
+		if rec := recover(); rec != nil {
+			log.Println(rec)
+			fi.Error = rec.(error).Error()
+		}
+	}()
+	var b bytes.Buffer
+	lr := &io.LimitedReader{R: p, N: MAX_FILE_SIZE + 1}
+	context := appengine.NewContext(r)
+	w, err := blobstore.Create(context, fi.Type)
+	defer func() {
+		w.Close()
+		fi.Size = MAX_FILE_SIZE + 1 - lr.N
+		fi.Key, err = w.Key()
+		check(err)
+		if !fi.ValidateSize() {
+			err := blobstore.Delete(context, fi.Key)
+			check(err)
+			return
+		}
+		delayedDelete(context, fi)
+		if b.Len() > 0 {
+			fi.CreateThumbnail(&b, context)
+		}
+		fi.CreateUrls(r, context)
+	}()
+	check(err)
+	var wr io.Writer = w
+	if imageTypes.MatchString(fi.Type) {
+		wr = io.MultiWriter(&b, w)
+	}
+	_, err = io.Copy(wr, lr)
+	return
+}
+
+func getFormValue(p *multipart.Part) string {
+	var b bytes.Buffer
+	io.CopyN(&b, p, int64(1<<20)) // Copy max: 1 MiB
+	return b.String()
+}
+
+func handleUploads(r *http.Request) (fileInfos []*FileInfo) {
+	fileInfos = make([]*FileInfo, 0)
+	mr, err := r.MultipartReader()
+	check(err)
+	r.Form, err = url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	part, err := mr.NextPart()
+	for err == nil {
+		if name := part.FormName(); name != "" {
+			if part.FileName() != "" {
+				fileInfos = append(fileInfos, handleUpload(r, part))
+			} else {
+				r.Form[name] = append(r.Form[name], getFormValue(part))
+			}
+		}
+		part, err = mr.NextPart()
+	}
+	return
+}
+
+func get(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path == "/" {
+		http.Redirect(w, r, WEBSITE, http.StatusFound)
+		return
+	}
+	parts := strings.Split(r.URL.Path, "/")
+	if len(parts) == 3 {
+		if key := parts[1]; key != "" {
+			blobKey := appengine.BlobKey(key)
+			bi, err := blobstore.Stat(appengine.NewContext(r), blobKey)
+			if err == nil {
+				w.Header().Add(
+					"Cache-Control",
+					fmt.Sprintf("public,max-age=%d", EXPIRATION_TIME),
+				)
+				if imageTypes.MatchString(bi.ContentType) {
+					w.Header().Add("X-Content-Type-Options", "nosniff")
+				} else {
+					w.Header().Add("Content-Type", "application/octet-stream")
+					w.Header().Add(
+						"Content-Disposition:",
+						fmt.Sprintf("attachment; filename=%s;", parts[2]),
+					)
+				}
+				blobstore.Send(w, appengine.BlobKey(key))
+				return
+			}
+		}
+	}
+	http.Error(w, "404 Not Found", http.StatusNotFound)
+}
+
+func post(w http.ResponseWriter, r *http.Request) {
+	b, err := json.Marshal(handleUploads(r))
+	check(err)
+	if redirect := r.FormValue("redirect"); redirect != "" {
+		http.Redirect(w, r, fmt.Sprintf(
+			redirect,
+			escape(string(b)),
+		), http.StatusFound)
+		return
+	}
+	jsonType := "application/json"
+	if strings.Index(r.Header.Get("Accept"), jsonType) != -1 {
+		w.Header().Set("Content-Type", jsonType)
+	}
+	fmt.Fprintln(w, string(b))
+}
+
+func delete(w http.ResponseWriter, r *http.Request) {
+	parts := strings.Split(r.URL.Path, "/")
+	if len(parts) != 3 {
+		return
+	}
+	if key := parts[1]; key != "" {
+		c := appengine.NewContext(r)
+		blobstore.Delete(c, appengine.BlobKey(key))
+		memcache.Delete(c, key)
+	}
+}
+
+func serveThumbnail(w http.ResponseWriter, r *http.Request) {
+	parts := strings.Split(r.URL.Path, "/")
+	if len(parts) == 3 {
+		if key := parts[2]; key != "" {
+			var data []byte
+			c := appengine.NewContext(r)
+			item, err := memcache.Get(c, key)
+			if err == nil {
+				data = item.Value
+			} else {
+				blobKey := appengine.BlobKey(key)
+				if _, err = blobstore.Stat(c, blobKey); err == nil {
+					fi := FileInfo{Key: blobKey}
+					data, _ = fi.CreateThumbnail(
+						blobstore.NewReader(c, blobKey),
+						c,
+					)
+				}
+			}
+			if err == nil && len(data) > 3 {
+				w.Header().Add(
+					"Cache-Control",
+					fmt.Sprintf("public,max-age=%d", EXPIRATION_TIME),
+				)
+				contentType := "image/png"
+				if string(data[:3]) == "GIF" {
+					contentType = "image/gif"
+				} else if string(data[1:4]) != "PNG" {
+					contentType = "image/jpeg"
+				}
+				w.Header().Set("Content-Type", contentType)
+				fmt.Fprintln(w, string(data))
+				return
+			}
+		}
+	}
+	http.Error(w, "404 Not Found", http.StatusNotFound)
+}
+
+func handle(w http.ResponseWriter, r *http.Request) {
+	params, err := url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	w.Header().Add("Access-Control-Allow-Origin", "*")
+	w.Header().Add(
+		"Access-Control-Allow-Methods",
+		"OPTIONS, HEAD, GET, POST, PUT, DELETE",
+	)
+	switch r.Method {
+	case "OPTIONS":
+	case "HEAD":
+	case "GET":
+		get(w, r)
+	case "POST":
+		if len(params["_method"]) > 0 && params["_method"][0] == "DELETE" {
+			delete(w, r)
+		} else {
+			post(w, r)
+		}
+	case "DELETE":
+		delete(w, r)
+	default:
+		http.Error(w, "501 Not Implemented", http.StatusNotImplemented)
+	}
+}
+
+func init() {
+	http.HandleFunc("/", handle)
+	http.HandleFunc("/thumbnails/", serveThumbnail)
+}