pycurl获取完整head信息

libcurl curl_easy_setopt()
中
CURLOPT_HEADERFUNCTION

函数指针: size_t function( void *ptr, size_t size, size_t nmemb, void *stream);

作用 :当libcurl收到header 数据, 会调用此函数处理.
当全部header的lines传递给回调函数后,此函数调用一次(为每个header), 可以使用此函数解析header


c中用法如

       curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
       curl_easy_setopt(curl, CURLOPT_READDATA, read_buff);        // or FILE*

       curl_easy_setopt(curl, CURLOPT_WRITEFUNCTIOIN, write_callback);
       curl_easy_setopt(curl, CURLOPT_WRITEDATA, write_buff);
// or FILE*

python用如,可以一个局部函数来保存到对应的c对象上

>>> def header(buf):
...     import sys
...     sys.stderr.write(buf)
...
>>>
>>> def body(buf):
...     pass
...
>>>
>>> import pycurl
>>>
>>> c = pycurl.Curl()
>>> c.setopt(pycurl.URL, "http://www.python.org/")
>>> c.setopt(pycurl.HEADERFUNCTION, header)
>>> c.setopt(pycurl.WRITEFUNCTION, body)
>>> c.perform()

HTTP/1.1 200 OK
Date: Sun, 12 Apr 2009 06:32:44 GMT
Server: Apache/2.2.9 (Debian) DAV/2 SVN/1.5.1 mod_ssl/2.2.9
OpenSSL/0.9.8g mod_wsgi/2.3 Python/2.5.2
Last-Modified: Sun, 12 Apr 2009 03:49:24 GMT
ETag: "105800d-42bb-467537bcfb900"
Accept-Ranges: bytes
Content-Length: 17083
Content-Type: text/html