func Upload(w http.ResponseWriter, r *http.Request, cfg config.Configuration, ctx model.Context) {
var err error
f := model.File{}
f.RemoteAddr = r.RemoteAddr
f.UserAgent = r.Header.Get("User-Agent")
// Extract the tag from the request
if r.Header.Get("tag") == "" {
tag := randomString(cfg.DefaultTagLength)
err = f.SetTag(tag)
ctx.Log.Println("Tag generated: " + f.Tag)
} else {
tag := r.Header.Get("tag")
err = f.SetTag(tag)
ctx.Log.Println("Tag specified: " + tag)
}
if err != nil {
ctx.Log.Println(err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
f.SetTagDir(cfg.Filedir)
ctx.Log.Println("Tag directory: " + f.TagDir)
// Write the request body to a temporary file
err = f.WriteTempfile(r.Body, cfg.Tempdir)
if err != nil {
ctx.Log.Println("Unable to write tempfile: ", err)
// Clean up by removing the tempfile
f.ClearTemp()
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
ctx.Log.Println("Tempfile: " + f.Tempfile)
ctx.Log.Println("Tempfile size: " + strconv.FormatInt(f.Bytes, 10) + " bytes")
// Do not accept files that are 0 bytes
if f.Bytes == 0 {
ctx.Log.Println("Empty files are not allowed. Aborting.")
// Clean up by removing the tempfile
f.ClearTemp()
http.Error(w, "No content. The file size must be more than "+
"0 bytes.", http.StatusBadRequest)
return
}
// Calculate and verify the checksum
checksum := r.Header.Get("content-sha256")
if checksum != "" {
ctx.Log.Println("Checksum specified: " + checksum)
}
err = f.VerifySHA256(checksum)
ctx.Log.Println("Checksum calculated: " + f.Checksum)
if err != nil {
ctx.Log.Println("The specified checksum did not match")
http.Error(w, "Checksum did not match", http.StatusConflict)
return
}
// Trigger new tag
t := model.Tag{}
t.SetTag(f.Tag)
t.SetTagDir(cfg.Filedir)
if !t.TagDirExists() {
if cfg.TriggerNewTag != "" {
ctx.Log.Println("Executing trigger: New tag")
triggerNewTagHandler(cfg.TriggerNewTag, f.Tag)
}
}
// Create the tag directory if it does not exist
err = f.EnsureTagDirectoryExists()
if err != nil {
ctx.Log.Println("Unable to create tag directory: ", f.TagDir)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
t.CalculateExpiration(cfg.Expiration)
expired, err := t.IsExpired(cfg.Expiration)
if err != nil {
ctx.Log.Println(err)
http.Error(w, "Internal server error", 500)
return
}
if expired {
ctx.Log.Println("The tag has expired. Aborting.")
http.Error(w, "This tag has expired.", 410)
return
}
// Extract the filename from the request
fname := r.Header.Get("filename")
if fname == "" {
ctx.Log.Println("Filename generated: " + f.Checksum)
f.SetFilename(f.Checksum)
} else {
ctx.Log.Println("Filename specified: " + fname)
err = f.SetFilename(fname)
if err != nil {
ctx.Log.Println(err)
http.Error(w, "Invalid filename specified. It contains illegal characters or is too short.",
http.StatusBadRequest)
return
}
}
if fname != f.Filename {
ctx.Log.Println("Filename sanitized: " + f.Filename)
}
err = f.DetectMIME()
if err != nil {
ctx.Log.Println("Unable to detect MIME: ", err)
} else {
ctx.Log.Println("MIME detected: " + f.MIME)
}
ctx.Log.Println("Media type: " + f.MediaType())
if f.MediaType() == "image" {
err = f.ParseExif()
if err != nil {
ctx.Log.Println(err)
}
// iOS devices provide only one filename even when uploading
// multiple images. Providing some workaround for this below.
// XXX: Refactoring needed.
if isWorkaroundNeeded(f.UserAgent) && !f.DateTime.IsZero() {
var fname string
dt := f.DateTime.Format("060102-150405")
// List of filenames to modify
if f.Filename == "image.jpeg" {
fname = "img-" + dt + ".jpeg"
}
if f.Filename == "image.gif" {
fname = "img-" + dt + ".gif"
}
if f.Filename == "image.png" {
fname = "img-" + dt + ".png"
}
if fname != "" {
ctx.Log.Println("Filename workaround triggered")
ctx.Log.Println("Filename modified: " + fname)
err = f.SetFilename(fname)
if err != nil {
ctx.Log.Println(err)
}
}
}
//err = f.GenerateThumbnail()
//if err != nil {
// ctx.Log.Println(err)
//}
//extra := make(map[string]string)
//if !f.DateTime.IsZero() {
// extra["DateTime"] = f.DateTime.String()
//}
//f.Extra = extra
}
// Promote file from tempdir to the published tagdir
f.Publish()
// Clean up by removing the tempfile
f.ClearTemp()
err = f.StatInfo()
if err != nil {
ctx.Log.Println(err)
http.Error(w, "Internal Server Error", 500)
return
}
f.GenerateLinks(cfg.Baseurl)
f.CreatedAt = time.Now().UTC()
//f.ExpiresAt = time.Now().UTC().Add(24 * 7 * 4 * time.Hour)
if cfg.TriggerUploadFile != "" {
ctx.Log.Println("Executing trigger: Uploaded file")
triggerUploadFileHandler(cfg.TriggerUploadFile, f.Tag, f.Filename)
}
// Purging any old content
if cfg.CacheInvalidation {
if err := f.Purge(); err != nil {
ctx.Log.Println(err)
}
}
ctx.WorkQueue <- f
w.Header().Set("Content-Type", "application/json")
var status = 201
output.JSONresponse(w, status, f, ctx)
}