func RequireValidImageParameters(w traffic.ResponseWriter, r *traffic.Request) {
width, err := strconv.Atoi(r.Param("width"))
if err != nil {
w.WriteHeader(http.StatusNotFound)
return
}
height, err := strconv.Atoi(r.Param("height"))
if err != nil {
height = width
}
if (width <= 2560 && width > 0) && (height <= 2560 && height > 0) {
w.SetVar("width", width)
w.SetVar("height", height)
// log latest greatest creation
if err := ioutil.WriteFile(filepath.Join(cache_folder, "/latest"), []byte(fmt.Sprintf("%d/%d", width, height)), 0644); err != nil {
// panic is trapped by Traffic and show us a nice stack trace in the browser
// a proper error handling should be provided, but in this simple example
// it's used to remind you to always check for errors
panic(err)
}
} else {
// bad request
w.WriteHeader(http.StatusBadRequest)
w.Render("400")
}
}
func pageHandler(w traffic.ResponseWriter, r *traffic.Request) {
pagePath := r.Param("page_path")
responseData := &ResponseData{
PagePath: pagePath,
}
w.Render("index", responseData)
}
func codesHandler(w traffic.ResponseWriter, r *traffic.Request) {
code := r.Param("code")
url := fmt.Sprintf("%s%s", baseUrl, code)
grid, err := qrencode.Encode(url, qrencode.ECLevelQ)
if err != nil {
panic(err)
}
w.Header().Set("Content-Type", "image/png")
png.Encode(w, grid.Image(8))
}
func (api *ImgServerApi) listHandler(w traffic.ResponseWriter, r *traffic.Request) {
age, err := strconv.Atoi(r.Param("age"))
if err != nil {
age = 0
}
files, err := api.imageDir.ListFiles(time.Duration(age) * time.Second)
if err != nil {
traffic.Logger().Print(err.Error())
w.WriteHeader(http.StatusInternalServerError)
} else {
w.WriteJSON(files)
}
}
func pageHandler(w traffic.ResponseWriter, r *traffic.Request) {
w.WriteText("Category ID: %s\n", r.Param("category_id"))
w.WriteText("Page ID: %s\n", r.Param("id"))
}
func checkPrivatePageApiKey(w traffic.ResponseWriter, r *traffic.Request) {
if r.Param("private_api_key") != "bar" {
w.WriteHeader(http.StatusUnauthorized)
w.WriteText("Not authorized\n")
}
}
func checkApiKey(w traffic.ResponseWriter, r *traffic.Request) {
if r.Param("api_key") != "foo" {
w.WriteHeader(http.StatusUnauthorized)
w.WriteText("Not authorized\n")
}
}