如何下载文件并以Clojure从内存解压缩? [英] How to download a file and unzip it from memory in clojure?

问题描述

我正在使用clj-http发出GET请求，响应是一个zip文件.此zip的内容始终是一个CSV文件.我想将CSV文件保存到磁盘，但是我不知道如何保存.

I'm making a GET request using clj-http and the response is a zip file. The contents of this zip is always one CSV file. I want to save the CSV file to disk, but I can't figure out how.

如果我将文件放在磁盘上，那么Raynes/fs库中的(fs/unzip文件名目标位置)效果很好，但我不知道如何强制clj-http变成可以读取的内容.如果可能的话，我想直接将文件解压缩，而无需

If I have the file on disk, (fs/unzip filename destination) from the Raynes/fs library works great, but I can't figure out how I can coerce the response from clj-http into something this can read. If possible, I'd like to unzip the file directly without

距离我最近的地方(如果距离很近的话)将我带到BufferedInputStream，但是我从那里迷路了.

The closest I've gotten (if this is even close) gets me to a BufferedInputStream, but I'm lost from there.

(require '[clj-http.client :as client])
(require '[clojure.java.io :as io])

(->
  (client/get "http://localhost:8000/blah.zip" {:as :byte-array})
  (:body)
  (io/input-stream))

推荐答案

您可以使用纯

You can use the pure java java.util.zip.ZipInputStream or java.util.zip.GZIPInputStream. Depends how the content is zipped. This is the code that saves your file using java.util.zip.GZIPInputStream :

(->
  (client/get "http://localhost:8000/blah.zip" {:as :byte-array})
  (:body)
  (io/input-stream)
  (java.util.zip.GZIPInputStream.)
  (clojure.java.io/copy (clojure.java.io/file "/path/to/output/file")))

使用java.util.zip.ZipInputStream使其更加复杂:

Using java.util.zip.ZipInputStream makes it only a bit more complicated :

(let [stream (->
                (client/get "http://localhost:8000/blah.zip" {:as :byte-array})
                (:body)
                (io/input-stream)
                (java.util.zip.ZipInputStream.))]
      (.getNextEntry stream)
      (clojure.java.io/copy stream (clojure.java.io/file "/path/to/output/file")))

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