// ---------------------------------------------------------------------------
// privates
//
func respondWithTemplate(ctx appengine.Context, w http.ResponseWriter, id string) {
filename := templateFile(id)
_, err := file.Stat(ctx, gcsFilesApiPath(bucket, filename))
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
location := gcsDirectPublicUrl(ctx, bucket, filename)
w.Header().Set("Location", location)
w.WriteHeader(http.StatusMovedPermanently)
}
// ---------------------------------------------------------------------------
// GET /meme/[id]/[top-text]/[bottom-text]
//
func MemeHandler(w http.ResponseWriter, r *http.Request) {
ctx := appengine.NewContext(r)
var id string
var topText string
var botText string
u, _ := url.Parse(r.RequestURI)
path := u.Path[1:]
if strings.LastIndex(path, ".jpg") == len(path)-4 {
path = path[:len(path)-4]
}
parts := strings.Split(path, "/")
if len(parts) > 1 {
id = parts[1]
if len(parts) > 2 {
topText = parts[2]
if len(parts) > 3 {
botText = parts[3]
}
}
}
topText = strings.Replace(topText, "_", " ", -1)
botText = strings.Replace(botText, "_", " ", -1)
filename := cacheFilename(id, topText, botText)
_, err := file.Stat(ctx, gcsFilesApiPath(bucket, filename))
if err != nil {
fileWriter, _, err := file.Create(ctx, filename, &file.CreateOptions{
MIMEType: "image/jpeg",
BucketName: bucket,
})
defer fileWriter.Close()
err = renderMeme(ctx, fileWriter, id, topText, botText)
if err != nil {
w.WriteHeader(http.StatusNotFound)
w.Write([]byte(err.Error()))
return
}
}
location := gcsDirectPublicUrl(ctx, bucket, filename)
w.Header().Set("Content-Type", "image/jpeg")
w.Header().Set("Location", location)
w.WriteHeader(http.StatusTemporaryRedirect)
}