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更新： 开发 Requests.py 的好心人正在处理此案。

我们正在与 HTTP 服务进行交互（测试），该服务在存在请求正文的情况下未提供Content-Length请求标头时响应 411（需要长度）状态代码；根据RFC 2616 ，这是可以预料的。

我们遇到的问题围绕请求 Python 模块（curl 按预期工作）。当发送一个格式错误的请求（在存在请求正文时缺少 Content-Length）时，服务会响应 411 并且连接被远程端点关闭（Connection: close）。这反过来会从 Requests Session.send 方法中引发异常，并且我们无法检索 HTTP 响应状态代码以进行验证。

是否可以在不更改 HTTP 服务的情况下停止这种情况（异常）并检索 HTTP 响应状态代码？

代码

from requests import Request, Session

endpoint = "http://api.corvusoft.co.uk/resources"
request_body = '{ "data": {"core-temperature": "1,430", "core-temperature-units": "celsius", ... } }'

request = Request('POST', endpoint, data=request_body, headers={"Connection": "close"})
prepared_request = request.prepare()
del prepared_request.headers['Content-Length']

session = Session()
response = session.send(prepared_request)

print response.status_code

堆栈跟踪

Scenario: HTTP PUT without Content-Length                                                                                               
    Given I have initialised the core sensors
    And I perform a HTTP "POST" request to "/readings" with headers "Content-Type: application/vnd.api+json; charset=utf-8, Accept: application/vnd.api+json":
      | """                                                   |
      | " { "data": {                                       " |
      | "     "id": "c0f22109-d258-4458-a3f5-0d16b2f55487", " |
      | "     "value": "acceptance-test"                    " |
      | "   }                                               " |
      | " }                                                 " |
      | """                                                   |
    When I perform a HTTP "PUT" request to "/queues/c0f22109-d258-4458-a3f5-0d16b2f55487" without header "Content-Length":
      | """                                                   |
      | " { "data": {                                       " |
      | "     "ttl": 30,                                    " |
      | "     "id": "c0f22109-d258-4458-a3f5-0d16b2f55487"  " |
      | "   }                                               " |
      | " }                                                 " |
      | """                                                   |
    Traceback (most recent call last):
      File "/Library/Python/2.7/site-packages/lettuce/core.py", line 144, in __call__
        ret = self.function(self.step, *args, **kw)
      File "/Users/Corvusoft/Development/test/acceptance/features/step_definitions/request.py", line 30, in i_perform_a_http_method_request_to_path_without_header_and_body
        i_perform_a_http_method_request_to_path_with_headers_and_body( step, method, path, "Accept: application/vnd.api+json, Content-Type: application/vnd.api+json; charset=utf-8", True )
      File "/Users/Corvusoft/Development/test/acceptance/features/step_definitions/request.py", line 91, in i_perform_a_http_method_request_to_path_with_headers_and_body
        response = session.send( request )
      File "/Library/Python/2.7/site-packages/requests/sessions.py", line 573, in send
        r = adapter.send(request, **kwargs)
      File "/Library/Python/2.7/site-packages/requests/adapters.py", line 415, in send
        raise ConnectionError(err, request=request)
    ConnectionError: [Errno 32] Broken pipe

要求

POST /resources HTTP/1.1
Host: api.corvusoft.co.uk
Connection: close
Content-Type: application/vnd.api+json; charset=utf-8
Accept: application/vnd.api+json
Accept-Charset: utf-8

{ "data": {"core-temperature": "1,430", "core-temperature-units": "celsius", ... } }

回复

HTTP/1.1 411 Length Required
Connection: close
Content-Type: application/vnd.api+json; charset=utf-8
Content-Length: 304

{"errors":[{"status":"411","title":"Content Length Required", "description": "The server refuses to accept the request without a defined Content-Length. The client MAY repeat the request if it adds a valid Content-Length header field containing the length of the message-body in the request message."}]}

环境

蟒蛇：2.7.5

要求：2.5.3

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