Flask中没有POST请求和内容类型“ application / json”的响应

Question

我在Flask视图中遇到问题，该视图应返回内容类型为“ application / json”的响应以响应POST请求。具体来说，如果我这样做：

curl -v -d 'foo=bar' http://example.org/jsonpost

对此视图：

@app.route('/jsonpost', methods=['GET', 'POST'])
def json_post():
    resp = make_response('{"test": "ok"}')
    resp.headers['Content-Type'] = "application/json"
    return resp

我得到某种连接重置：

* About to connect() to example.org port 80 (#0)
*   Trying xxx.xxx.xxx.xxx... connected
* Connected to example.org (xxx.xxx.xxx.xxx) port 80 (#0)
> POST /routing/jsonpost HTTP/1.1
> User-Agent: curl/7.19.7 (i486-pc-linux-gnu) libcurl/7.19.7 OpenSSL/0.9.8k zlib/1.2.3.3 libidn/1.15
> Host: example.org
> Accept: */*
> Content-Length: 7
> Content-Type: application/x-www-form-urlencoded
>
< HTTP/1.1 200 OK
< Server: nginx/1.2.4
< Date: Thu, 27 Dec 2012 14:07:59 GMT
< Content-Type: application/json
< Content-Length: 14
< Connection: keep-alive
< Set-Cookie: session="..."; Path=/; HttpOnly
< Cache-Control: public
<
* transfer closed with 14 bytes remaining to read
* Closing connection #0
curl: (18) transfer closed with 14 bytes remaining to read

如果相反，我这样做：

curl -d 'foo=bar' http://example.org/htmlpost

至：

@app.route('/htmlpost', methods=['GET', 'POST'])
def html_post():
    resp = make_response('{"test": "ok"}')
    resp.headers['Content-Type'] = "text/html"
    return resp

我得到了预期的全面答复（200 ok）

{"test": "ok"}

顺便说一句，如果我将GET请求发送到同一JSON路由：

curl http://example.org/jsonpost

我也得到了预期的答复。

Answer 1

感谢Audrius的评论，我找到了uWSGI和nginx之间交互的问题的可能根源：显然，如果您在请求中收到POST数据，则 必须先
读取它，然后再返回响应。

例如，这解决了我的问题。

@app.route('/jsonpost', methods=['GET', 'POST'])
def json_post():
    if request.method == 'POST':
        dummy = request.form
    resp = make_response('{"test": "ok"}')
    resp.headers['Content-Type'] = "application/json"
    return resp

如[uWSGI的作者Roberto DeIoris]--post-buffering1所述，一种不同的解决方案涉及传递给uWSGI。

我仍然不明白为什么问题不会在Content-Type设置为"text/html"