将图像表单clj-http请求保存到文件

Question

我正在尝试保存使用clj-http下载的文件

我有以下代码：

(def test-file
  (cl/get "http://placehold.it/350x150"))

(defn write-file []
   (with-open [w (clojure.java.io/writer  "test-file.gif" :append true)]
(.write w (:body test-file))))

当我试图把它变成一个字节数组时，我得到了一个异常：

       user=>     (def test-file
                    (cl/get "http://placehold.it/350x150" {:as :byte-array}))
       #'user/test-file
       user=> (write-file)
       IllegalArgumentException No matching method found: write for class java.io.BufferedWriter  clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:79)

帮助!

Answer 1

使用二进制输出。

(def test-file
  (client/get "http://placehold.it/350x150" {:as :byte-array}))

(defn write-file []
   (with-open [w (java.io.BufferedOutputStream. (java.io.FileOutputStream. "test-file.gif"))]
     (.write w (:body test-file))))

编辑：输出流更好：

(defn write-file []
   (with-open [w (clojure.java.io/output-stream "test-file.gif")]
     (.write w (:body test-file))))

更新：

优雅的方式：

(clojure.java.io/copy
 (:body (client/get "http://placehold.it/350x150" {:as :stream}))
 (java.io.File. "test-file.gif"))