php cURL操作在120308毫秒后超时，X收到-1个字节

Question

我在抓取脚本中偶尔会遇到此错误（请参阅标题）。

X是整数​​个字节＆gt; 0，webserver在响应中发送的实际字节数。我用Charles代理调试了这个问题，这就是我看到的

正如您所看到的，没有Content-Length：标头作为响应，代理仍在等待数据（因此cURL等待了2分钟并放弃了）

cURL错误代码为28.

以下是来自该请求的var_export'ed curl_getinfo（）的详细curl输出的一些调试信息：

* About to connect() to proxy 127.0.0.1 port 8888 (#584)
*   Trying 127.0.0.1...
* Adding handle: conn: 0x2f14d58
* Adding handle: send: 0
* Adding handle: recv: 0
* Curl_addHandleToPipeline: length: 1
* - Conn 584 (0x2f14d58) send_pipe: 1, recv_pipe: 0
* Connected to 127.0.0.1 (127.0.0.1) port 8888 (#584)
> GET http://bakersfield.craigslist.org/sof/3834062623.html HTTP/1.0
User-Agent: Firefox (WindowsXP) Ц Mozilla/5.1 (Windows; U; Windows NT 5.1; en-GB
; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6
Host: bakersfield.craigslist.org
Accept: */*
Referer: http://bakersfield.craigslist.org/sof/3834062623.html
Proxy-Connection: Keep-Alive

< HTTP/1.1 200 OK
< Cache-Control: max-age=300, public
< Last-Modified: Thu, 11 Jul 2013 21:50:17 GMT
< Date: Thu, 11 Jul 2013 21:50:17 GMT
< Vary: Accept-Encoding
< Content-Type: text/html; charset=iso-8859-1
< X-MCP-Cache-Control: max-age=2592000, public
< X-Frame-Options: SAMEORIGIN
* Server Apache is not blacklisted
< Server: Apache
< Expires: Thu, 11 Jul 2013 21:55:17 GMT
* HTTP/1.1 proxy connection set close!
< Proxy-Connection: Close
<
* Operation timed out after 120308 milliseconds with 4636 out of -1 bytes receiv
ed
* Closing connection 584
Curl error: 28 Operation timed out after 120308 milliseconds with 4636 out of -1
 bytes received http://bakersfield.craigslist.org/sof/3834062623.htmlarray (
  'url' => 'http://bakersfield.craigslist.org/sof/3834062623.html',
  'content_type' => 'text/html; charset=iso-8859-1',
  'http_code' => 200,
  'header_size' => 362,
  'request_size' => 337,
  'filetime' => -1,
  'ssl_verify_result' => 0,
  'redirect_count' => 0,
  'total_time' => 120.308,
  'namelookup_time' => 0,
  'connect_time' => 0,
  'pretransfer_time' => 0,
  'size_upload' => 0,
  'size_download' => 4636,
  'speed_download' => 38,
  'speed_upload' => 0,
  'download_content_length' => -1,
  'upload_content_length' => 0,
  'starttransfer_time' => 2.293,
  'redirect_time' => 0,
  'certinfo' =>
  array (
  ),
  'primary_ip' => '127.0.0.1',
  'primary_port' => 8888,
  'local_ip' => '127.0.0.1',
  'local_port' => 63024,
  'redirect_url' => '',
)

我可以执行类似添加卷曲选项以避免这些超时的操作。这不是连接超时，也不是数据等待超时 - 这两个设置都不起作用，因为curl实际连接成功并接收到一些数据，因此错误超时总是〜= 120000 ms。

Answer 1

我注意到你正试图解析Craigslist;它可能是他们的反洪水保护吗？ 如果您尝试解析其他网站，问题是否仍然存在？我曾尝试以递归方式映射FTP。

关于超时，如果您确定既不是连接超时也不是数据等待超时（CURLOPT_CONNECTTIMEOUT / CURLOPT_TIMEOUT），我会尝试增加PHP脚本本身的限制：

set_time_limit(0);

Answer 2

尝试在PHP配置文件default_socket_timeout（例如php.ini）中增加~/php.ini，例如

default_socket_timeout = 300

或在PHP代码中通过curl设置为：

curl_setopt($res, CURLOPT_TIMEOUT, 300);

其中$res是您现有的资源变量。