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当我在虚张声势(通过 request.session())中为 Web 服务编写处理程序时,我遇到了这个特殊性:

POST 请求在被重定向时会变成 GET 请求。导致我的 POST 被破坏,我无法让它工作。

编辑:实际的请求调用来自虚张声势,如下所述: 如何在 Bravado 中设置自定义 http 客户端?我需要设置额外的客户端证书。

因此,请求呼叫/会话本身被虚张声势所掩盖。

这个问题(请求的 post/get 转换)已经在其他线程中讨论过,根据规范考虑它,但仍然很奇怪。

最后,我只是侵入了 session.py 中以下部分的请求:

def rebuild_method(self, prepared_request, response):
    """When being redirected we may want to change the method of the request
    based on certain specs or browser behavior.
    """


    method = prepared_request.method

    # http://tools.ietf.org/html/rfc7231#section-6.4.4
    if response.status_code == codes.see_other and method != 'HEAD':
        method = 'GET'


    # Do what the browsers do, despite standards...
    # First, turn 302s into GETs.
    if response.status_code == codes.found and method != 'HEAD':
        if method == 'POST':
            #print ( '\n\nDeliberately not changing to GET\n\n' )
        else:
            method = 'GET'

    # Second, if a POST is responded to with a 301, turn it into a GET.
    # This bizarre behaviour is explained in Issue 1704.
    if response.status_code == codes.moved and method == 'POST':
        method = 'GET'


    prepared_request.method = method

我根本没有改变得到的地方。

还有这里:

def resolve_redirects(self, resp, req, stream=False, timeout=None,
                      verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):

我注释掉的地方:

##            # https://github.com/requests/requests/issues/1084
##            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
##                # https://github.com/requests/requests/issues/3490
##                print(prepared_request.headers)
##                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
##                for header in purged_headers:
##                    prepared_request.headers.pop(header, None)
##                prepared_request.body = None

当然这是丑陋的黑客,但我应该怎么做?希望有人对此有指导。

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1 回答 1

1

如果您不想更改请求库,则可以检查代码中的重定向,这是一个示例:

url = 'https://httpbin.org/redirect-to?url=http%3A%2F%2Fhttpbin.org%2Fpost'
data = {'name': 'Hello'}
while True:
    rep = requests.post(url, data=data, allow_redirects=False)
    if rep.status_code in [301, 302]:
        url = rep.headers.get('location')
        print 'redirect to', url
        continue
    break

print rep.text

当然,您必须处理无限循环的可能性和其他 http 状态代码

于 2017-11-24T22:25:13.303 回答