抓取网页的问题

converse

试试这个,我也不太清楚:

The HEAD Method

A HEAD request is just like a GET request, except it asks the server to return the response headers only, and not the actual resource (i.e. no message body). This is useful to check characteristics of a resource without actually downloading it, thus saving bandwidth. Use HEAD when you don't actually need a file's contents.

The response to a HEAD request must never contain a message body, just the status line and headers.

http://jmarshall.com/easy/http/

converse

如果是这样的话,LZ的问题似乎就没办法解决了....期待更好的答案.