使用httplib2限制响应大小 [英] Limiting response size with httplib2

问题描述

是否可以使用httplib2限制响应大小？例如，如果它看到超过X字节的HTTP主体，则连接将关闭而不消耗更多带宽。或者也许只下载文件的前X个字节。

Is it possible to limit the response size with httplib2? For instance if it sees an HTTP body over X bytes the connection will just close without consuming more bandwidth. Or perhaps only download the first X bytes of a file.

推荐答案

假设服务器正在发送响应体大小 Content-Length 响应标题字段，你可以自己动手。

Assuming that the server is sending the response body size in the Content-Length response header field, you can do it yourself.

首先，调用 Http .request（method =HEAD）只检索标题而不是正文。然后检查响应的 Content-Length 字段，看它是否低于您的阈值。如果是，请使用正确的 GET 或 POST 方法发出第二个请求以检索正文;否则会产生错误。

First, call Http.request(method="HEAD") to retrieve only the headers and not the body. Then inspect the Content-Length field of the response to see if it is below your threshold. If it is, make a second request with the proper GET or POST method to retrieve the body; otherwise produce an error.

如果服务器没有给你Content-Length（或说谎的话），看起来就像是有办法在一些字节后切断下载。

If the server isn't giving you the Content-Length (or is lying about it), it doesn't look like there is a way to cut off the download after some number of bytes.

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