How to make a permanent http request with curl?

Question

How can I request multiple pages from the same web server on the same connection?

Thus, the client side needs to retrieve the response for each request, of course, this is the server’s job to make the answer in the same order as requested.

Does anyone know a trick?

Answer 1

I don’t know if you really meant “simultaneous”, but from the description, I believe that you just want to reuse the connection. If you just perform two requests on the same server, it should reuse the connection

persistant.c

 /* get the first document */ curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/"); res = curl_easy_perform(curl); /* get another document from the same server using the same connection */ curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/docs/"); res = curl_easy_perform(curl); 

Here are the output particles:

 * About to connect() to example.com port 80 (#0) * Trying 192.0.32.10... * connected * Connected to example.com (192.0.32.10) port 80 (#0) [...] * HTTP/1.0 connection set to keep alive! < Connection: Keep-Alive Connection: Keep-Alive [...] * Connection #0 to host example.com left intact * Re-using existing connection! (#0) with host example.com * Connected to example.com (192.0.32.10) port 80 (#0) 

EDIT In light of the comment

In this case, you need a multi interface. multi interafce says:

Enable multiple simultaneous transfers in the same thread without which complicates the application.

See multi-double.c ("Just upload two HTTP files!") For an example.