diff options
Diffstat (limited to 'vendor/blueimp/jquery-file-upload/server/gae-go')
3 files changed, 373 insertions, 0 deletions
diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml b/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml new file mode 100644 index 000000000..b5ac1a2e1 --- /dev/null +++ b/vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml @@ -0,0 +1,10 @@ +runtime: go +api_version: go1 + +handlers: +- url: /(favicon\.ico|robots\.txt) + static_files: static/\1 + upload: static/(.*) + expiration: '1d' +- url: /.* + script: _go_app diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/main.go b/vendor/blueimp/jquery-file-upload/server/gae-go/main.go new file mode 100644 index 000000000..a92d128c0 --- /dev/null +++ b/vendor/blueimp/jquery-file-upload/server/gae-go/main.go @@ -0,0 +1,361 @@ +/* + * jQuery File Upload Plugin GAE Go Example + * https://github.com/blueimp/jQuery-File-Upload + * + * Copyright 2011, Sebastian Tschan + * https://blueimp.net + * + * Licensed under the MIT license: + * https://opensource.org/licenses/MIT + */ + +package app + +import ( + "bufio" + "bytes" + "encoding/json" + "fmt" + "github.com/disintegration/gift" + "golang.org/x/net/context" + "google.golang.org/appengine" + "google.golang.org/appengine/memcache" + "hash/crc32" + "image" + "image/gif" + "image/jpeg" + "image/png" + "io" + "log" + "mime/multipart" + "net/http" + "net/url" + "path/filepath" + "regexp" + "strings" +) + +const ( + WEBSITE = "https://blueimp.github.io/jQuery-File-Upload/" + MIN_FILE_SIZE = 1 // bytes + // Max file size is memcache limit (1MB) minus key size minus overhead: + MAX_FILE_SIZE = 999000 // bytes + IMAGE_TYPES = "image/(gif|p?jpeg|(x-)?png)" + ACCEPT_FILE_TYPES = IMAGE_TYPES + THUMB_MAX_WIDTH = 80 + THUMB_MAX_HEIGHT = 80 + EXPIRATION_TIME = 300 // seconds + // If empty, only allow redirects to the referer protocol+host. + // Set to a regexp string for custom pattern matching: + REDIRECT_ALLOW_TARGET = "" +) + +var ( + imageTypes = regexp.MustCompile(IMAGE_TYPES) + acceptFileTypes = regexp.MustCompile(ACCEPT_FILE_TYPES) + thumbSuffix = "." + fmt.Sprint(THUMB_MAX_WIDTH) + "x" + + fmt.Sprint(THUMB_MAX_HEIGHT) +) + +func escape(s string) string { + return strings.Replace(url.QueryEscape(s), "+", "%20", -1) +} + +func extractKey(r *http.Request) string { + // Use RequestURI instead of r.URL.Path, as we need the encoded form: + path := strings.Split(r.RequestURI, "?")[0] + // Also adjust double encoded slashes: + return strings.Replace(path[1:], "%252F", "%2F", -1) +} + +func check(err error) { + if err != nil { + panic(err) + } +} + +type FileInfo struct { + Key string `json:"-"` + ThumbnailKey string `json:"-"` + Url string `json:"url,omitempty"` + ThumbnailUrl string `json:"thumbnailUrl,omitempty"` + Name string `json:"name"` + Type string `json:"type"` + Size int64 `json:"size"` + Error string `json:"error,omitempty"` + DeleteUrl string `json:"deleteUrl,omitempty"` + DeleteType string `json:"deleteType,omitempty"` +} + +func (fi *FileInfo) ValidateType() (valid bool) { + if acceptFileTypes.MatchString(fi.Type) { + return true + } + fi.Error = "Filetype not allowed" + return false +} + +func (fi *FileInfo) ValidateSize() (valid bool) { + if fi.Size < MIN_FILE_SIZE { + fi.Error = "File is too small" + } else if fi.Size > MAX_FILE_SIZE { + fi.Error = "File is too big" + } else { + return true + } + return false +} + +func (fi *FileInfo) CreateUrls(r *http.Request, c context.Context) { + u := &url.URL{ + Scheme: r.URL.Scheme, + Host: appengine.DefaultVersionHostname(c), + Path: "/", + } + uString := u.String() + fi.Url = uString + fi.Key + fi.DeleteUrl = fi.Url + fi.DeleteType = "DELETE" + if fi.ThumbnailKey != "" { + fi.ThumbnailUrl = uString + fi.ThumbnailKey + } +} + +func (fi *FileInfo) SetKey(checksum uint32) { + fi.Key = escape(string(fi.Type)) + "/" + + escape(fmt.Sprint(checksum)) + "/" + + escape(string(fi.Name)) +} + +func (fi *FileInfo) createThumb(buffer *bytes.Buffer, c context.Context) { + if imageTypes.MatchString(fi.Type) { + src, _, err := image.Decode(bytes.NewReader(buffer.Bytes())) + check(err) + filter := gift.New(gift.ResizeToFit( + THUMB_MAX_WIDTH, + THUMB_MAX_HEIGHT, + gift.LanczosResampling, + )) + dst := image.NewNRGBA(filter.Bounds(src.Bounds())) + filter.Draw(dst, src) + buffer.Reset() + bWriter := bufio.NewWriter(buffer) + switch fi.Type { + case "image/jpeg", "image/pjpeg": + err = jpeg.Encode(bWriter, dst, nil) + case "image/gif": + err = gif.Encode(bWriter, dst, nil) + default: + err = png.Encode(bWriter, dst) + } + check(err) + bWriter.Flush() + thumbnailKey := fi.Key + thumbSuffix + filepath.Ext(fi.Name) + item := &memcache.Item{ + Key: thumbnailKey, + Value: buffer.Bytes(), + } + err = memcache.Set(c, item) + check(err) + fi.ThumbnailKey = thumbnailKey + } +} + +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 buffer bytes.Buffer + hash := crc32.NewIEEE() + mw := io.MultiWriter(&buffer, hash) + lr := &io.LimitedReader{R: p, N: MAX_FILE_SIZE + 1} + _, err := io.Copy(mw, lr) + check(err) + fi.Size = MAX_FILE_SIZE + 1 - lr.N + if !fi.ValidateSize() { + return + } + fi.SetKey(hash.Sum32()) + item := &memcache.Item{ + Key: fi.Key, + Value: buffer.Bytes(), + } + context := appengine.NewContext(r) + err = memcache.Set(context, item) + check(err) + fi.createThumb(&buffer, context) + fi.CreateUrls(r, context) + 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 validateRedirect(r *http.Request, redirect string) bool { + if redirect != "" { + var redirectAllowTarget *regexp.Regexp + if REDIRECT_ALLOW_TARGET != "" { + redirectAllowTarget = regexp.MustCompile(REDIRECT_ALLOW_TARGET) + } else { + referer := r.Referer() + if referer == "" { + return false + } + refererUrl, err := url.Parse(referer) + if err != nil { + return false + } + redirectAllowTarget = regexp.MustCompile("^" + regexp.QuoteMeta( + refererUrl.Scheme+"://"+refererUrl.Host+"/", + )) + } + return redirectAllowTarget.MatchString(redirect) + } + return false +} + +func get(w http.ResponseWriter, r *http.Request) { + if r.URL.Path == "/" { + http.Redirect(w, r, WEBSITE, http.StatusFound) + return + } + // Use RequestURI instead of r.URL.Path, as we need the encoded form: + key := extractKey(r) + parts := strings.Split(key, "/") + if len(parts) == 3 { + context := appengine.NewContext(r) + item, err := memcache.Get(context, key) + if err == nil { + w.Header().Add("X-Content-Type-Options", "nosniff") + contentType, _ := url.QueryUnescape(parts[0]) + if !imageTypes.MatchString(contentType) { + contentType = "application/octet-stream" + } + w.Header().Add("Content-Type", contentType) + w.Header().Add( + "Cache-Control", + fmt.Sprintf("public,max-age=%d", EXPIRATION_TIME), + ) + w.Write(item.Value) + return + } + } + http.Error(w, "404 Not Found", http.StatusNotFound) +} + +func post(w http.ResponseWriter, r *http.Request) { + result := make(map[string][]*FileInfo, 1) + result["files"] = handleUploads(r) + b, err := json.Marshal(result) + check(err) + if redirect := r.FormValue("redirect"); validateRedirect(r, redirect) { + if strings.Contains(redirect, "%s") { + redirect = fmt.Sprintf( + redirect, + escape(string(b)), + ) + } + http.Redirect(w, r, redirect, http.StatusFound) + return + } + w.Header().Set("Cache-Control", "no-cache") + 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) { + key := extractKey(r) + parts := strings.Split(key, "/") + if len(parts) == 3 { + result := make(map[string]bool, 1) + context := appengine.NewContext(r) + err := memcache.Delete(context, key) + if err == nil { + result[key] = true + contentType, _ := url.QueryUnescape(parts[0]) + if imageTypes.MatchString(contentType) { + thumbnailKey := key + thumbSuffix + filepath.Ext(parts[2]) + err := memcache.Delete(context, thumbnailKey) + if err == nil { + result[thumbnailKey] = true + } + } + } + w.Header().Set("Content-Type", "application/json") + b, err := json.Marshal(result) + check(err) + fmt.Fprintln(w, string(b)) + } else { + http.Error(w, "405 Method not allowed", http.StatusMethodNotAllowed) + } +} + +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, DELETE", + ) + w.Header().Add( + "Access-Control-Allow-Headers", + "Content-Type, Content-Range, Content-Disposition", + ) + switch r.Method { + case "OPTIONS", "HEAD": + return + 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) +} diff --git a/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt b/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt new file mode 100644 index 000000000..eb0536286 --- /dev/null +++ b/vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt @@ -0,0 +1,2 @@ +User-agent: * +Disallow: |