diff options
Diffstat (limited to 'vendors/jquery-file-upload/server/gae-go/app/main.go')
-rw-r--r-- | vendors/jquery-file-upload/server/gae-go/app/main.go | 361 |
1 files changed, 0 insertions, 361 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 deleted file mode 100644 index 01dc2f204..000000000 --- a/vendors/jquery-file-upload/server/gae-go/app/main.go +++ /dev/null @@ -1,361 +0,0 @@ -/* - * 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) -} |