Question

我使用pyCurl脚本点击本地Django-Tastypie REST网络服务器时发现了一些非常奇怪的东西。

当我使用除pycurl（包括curl）之外的所有内容时，向服务器发出HTTP PUT请求成功，并在pycurl中失败并显示错误400.

经过大量的谷歌搜索和实验，我很难过。 这里有什么问题？

有效的卷曲调用：

curl --verbose -X PUT -H 'Content-Type: application/json' -d '{"first_name": "Gaius","id": 1,"last_name": "Balthazar","login": "gbalthazar"}' http://localhost:8000/api/person/1/

PyCurl调用不起作用（错误400）：

import pycurl
import StringIO
curl = pycurl.Curl()
url = 'http://localhost:8000/api/person/1/'
curl.setopt(pycurl.URL,url)
curl.setopt(pycurl.VERBOSE, 1)
body = '{"first_name": "Gaius","id": 1,"last_name": "Baltar","login": "gbaltar"}'
curl.setopt(pycurl.READFUNCTION, StringIO.StringIO(body).read)
curl.setopt(pycurl.UPLOAD, 1)
curl.setopt(pycurl.HTTPHEADER,['Content-Type: application/json','Expect:'])
curl.setopt(curl.TIMEOUT, 5)
curl.perform()

（我也尝试删除Expects标题，我在pycurl调用中看到标题设置为100-Continue，但结果相同。）

不幸的是，这个项目真的需要pycurl对HTTP时序统计的低级访问来衡量性能，所以我不能用另一个HTTP / REST库来做。

Curl Call的输出：

* About to connect() to localhost port 8000 (#0)
*   Trying 127.0.0.1...
* connected
* Connected to localhost (127.0.0.1) port 8000 (#0)
> PUT /api/person/1/ HTTP/1.1
> User-Agent: curl/7.27.0
> Host: localhost:8000
> Accept: */*
> Content-Type: application/json
> Content-Length: 78
> 
* upload completely sent off: 78 out of 78 bytes
* HTTP 1.0, assume close after body
< HTTP/1.0 200 OK
< Date: Thu, 05 Jun 2014 23:45:26 GMT
< Server: WSGIServer/0.1 Python/2.7.3
< Vary: Accept
< X-Frame-Options: SAMEORIGIN
< Content-Type: application/json
< 
* Closing connection #0
{"first_name": "Gaius", "id": 1, "last_name": "Balthazar", "login": "gbalthazar", "pk": "1", "resource_uri": "/api/person/1/"}

PyCurl Verbose Call的输出：

* About to connect() to localhost port 8000 (#0)
*   Trying 127.0.0.1...
* connected
* Connected to localhost (127.0.0.1) port 8000 (#0)
> PUT /api/person/1/ HTTP/1.1
User-Agent: PycURL/7.27.0
Host: localhost:8000
Accept: */*
Transfer-Encoding: chunked
Content-Type: application/json

* HTTP 1.0, assume close after body
< HTTP/1.0 400 BAD REQUEST
< Date: Thu, 05 Jun 2014 23:44:25 GMT
< Server: WSGIServer/0.1 Python/2.7.3
< X-Frame-Options: SAMEORIGIN
< Content-Type: application/json
< 
* Closing connection #0
{"error": ""}

我在这里缺少什么？

Answer 1

找到答案：它需要请求正文的长度才能正确处理

对于POST：

curl.setopt(pycurl.POSTFIELDSIZE, len(body))

对于PUT：

curl.setopt(pycurl.INFILESIZE, len(body))

（是的，对于不同的HTTP调用来说，这是一个不同的选项......那就是你的libcurl）

不完全确定是什么触发了这种行为，但上面修复了它并且测试现在正常工作。

编辑：从中添加详细的pycurl输出：

* About to connect() to localhost port 8000 (#0)
*   Trying 127.0.0.1...
* connected
* Connected to localhost (127.0.0.1) port 8000 (#0)
> PUT /api/person/1/ HTTP/1.1
User-Agent: PycURL/7.27.0
Host: localhost:8000
Accept: */*
Content-Type: application/json
Content-Length: 72

* We are completely uploaded and fine
* HTTP 1.0, assume close after body
< HTTP/1.0 200 OK
< Date: Fri, 06 Jun 2014 17:41:38 GMT
< Server: WSGIServer/0.1 Python/2.7.3
< Vary: Accept
< X-Frame-Options: SAMEORIGIN
< Content-Type: application/json
< 
* Closing connection #0
{"first_name": "Gaius", "id": 1, "last_name": "Baltar", "login": "gbaltar", "pk": "1", "resource_uri": "/api/person/1/"}

为什么我不能用pyCurl发布到Django？

1 个答案: