php cURL操作在120308毫秒后超时,X收到-1个字节

Question

我偶然在我的抓取脚本中遇到此错误(请参阅标题).

X是整数个字节数> 0,即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,这就是我所看到的

正如您所看到的,响应中没有Content-Length:标头,代理仍然等待数据(因此cURL等待2分钟并放弃)

cURL错误代码是28.

下面是来自verbose curl输出的一些调试信息,其中包含该请求的var_export'ed curl_getinfo():

* 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) ? 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' => '',
)

我可以做一些像添加卷曲选项以避免这些超时.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一些数据,因此错误超时总是〜= 120000 ms.

Answer 1

我注意到你正在尝试解析 Craigslist；难道是他们的防洪措施？如果您尝试解析其他网站，问题是否仍然存在？我曾经在尝试递归映射 FTP 时遇到过同样的问题。

关于超时，如果您确定这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);