How to extract the Location: HTTP header field with libcurl?

Question

I m using libcurl as a http client in my application. I can send and receive http messages with libcurl.

I want to extract the location field from the received http message when I got a message with http 302 as indicated above.

HTTP/1.1 302 Found
Location: http://192.168.201.1
Content-Length: 0

How I can extract the location field when I got http 302 message?

@el.pescado Should I make redirect with libcurl to get the http url redirect info? because I do not want to. I just want to extract the info that's all. — MOHAMED
– MOHAMED, Commented Jan 4, 2016 at 10:58
Did you read the linked page? "receive the URL a redirect would take you to if you would enable CURLOPT_FOLLOWLOCATION". In other words it tells you where the redirect would go to if you were to follow it. In particular, if the redirect is a relative URL, it will take the original URL and figure out the absolute target URL. — Martin Bonner supports Monica
– Martin Bonner supports Monica, Commented Jan 4, 2016 at 11:34
@el.pescado it works. Thanks. Could you post your comment as answer and I will accept your answer (inchallah) — MOHAMED
– MOHAMED, Commented Jan 4, 2016 at 12:44
Based on this question, I've also added a getredirect example to the curl site showing how to use it: curl.haxx.se/libcurl/c/getredirect.html — Daniel Stenberg
– Daniel Stenberg, Commented Jan 4, 2016 at 14:14

Daniel Stenberg · Accepted Answer · 2016-01-04 14:52:32Z

3

If you need processed, absolute URL that you woult land on when following the redirect, use CURLINFO_REDIRECT_URL option. See also the getredirect example.

When you need raw value of Location header, you need to implement CURLOPT_HEADERFUNCTION callback and wait for the header to arrive.

edited Jan 4, 2016 at 14:52

Daniel Stenberg

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answered Jan 4, 2016 at 14:34

el.pescado - нет войне

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