Python请求从POST中删除Content-Length标头 [英] Python requests remove the Content-Length header from POST

问题描述

我正在使用python请求模块对网站进行一些测试。

I'm using the python requests module to do some testing against a site.

请求模块允许您通过传入字典来删除某些标题。键设置为无。例如

The requests module allows you to remove certain headers by passing in a dictionary with the keys set to None. For example

headers = {u'User-Agent': None}

将确保没有用户代理与请求一起发送。

will ensure that no user agent is sent with the request.

然而，似乎当我发布数据，请求将为我计算正确的Content-Length，即使我指定None或不正确的值。例如。

However, it seems that when I post data, requests will calculate the correct Content-Length for me even if I specify None, or an incorrect value. Eg.

headers = {u'Content-Length': u'999'}
headers = {u'Content-Length': None}

我检查请求中使用的标头的响应（响应。 request.headers）我可以看到Content-Length已经重新添加了正确的值。到目前为止我看不到任何方法来禁用此行为

I check the response for the headers used in the request (response.request.headers) and I can see the the Content-Length has been re-added with the correct value. So Far I cannot see any way to disable this behaviour

CaseInsensitiveDict({'Content-Length': '39', 'Content-Type': 'application/x-www-form-urlencoded', 'Accept-Encoding': 'gzip, deflate, compress', 'Accept': '*/*', 'User-Agent': 'python-requests/2.2.1 CPython/2.7.6 Linux/3.13.0-36-generic'})

我真的很想继续使用请求模块来做这件事。这可能吗？

I'd REALLY like to remain with the requests module to do this. Is this possible?

推荐答案

你必须手动准备请求，然后删除生成的内容长度标题：

You'll have to prepare the request manually, then remove the generated content-length header:

from requests import Request, Session

s = Session()
req = Request('POST', url, data=data)
prepped = req.prepare()
del prepped.headers['content-length']
response = s.send(prepped)

请注意，大多数兼容的HTTP服务器可能会忽略您的帖子正文！

Do note that most compliant HTTP servers may then ignore your post body!

如果您打算使用分块传输编码（您不必发送内容长度） ），然后使用迭代器获取 data 参数。请参阅 Chunked-Encoded Requests 在文档中。在这种情况下，将设置 Content-Length 标头。

If you meant to use chunked transfer encoding (where you don't have to send a content length), then use a iterator for the data parameter. See Chunked-Encoded Requests in the documentation. No Content-Length header will be set in that case.

这篇关于Python请求从POST中删除Content-Length标头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！