Re: http post request with authentication

[Dan Fandrich]

On Mon, May 23, 2016 at 09:00:39PM +, Michael Pfeffer via curl-library 
wrote:
> At first i´m a newbie in using libcurl. I must login via http post (libcurl) 
> to http://earthexplorer.usgs.gov and collect images. I use the POSTFIELDS 
> data to set  search criteria but it doesnt seem to work. How can i  select a 
> option? How can i select a inputfield without name?
> I even don't know if i ask the right questions. I used some other sides with 
> get request, it worked fine.
> 
> curl_easy_setopt(curl,CURLOPT_URL,"http://earthexplorer.usgs.gov;);
> curl_easy_setopt(curl,CURLOPT_USERPWD,"login:password");
> curl_easy_setopt(curl,CURLOPT_POSTFIELDS,"typeAddress=WRS1=3$rowAddress=3");
> curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
> curl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,true);

It's unlikely the web site uses HTTP authentication for login. It more likely
uses a cookie that is set following a POST to some other URL which must then be
sent with the request. See
https://curl.haxx.se/docs/httpscripting.html#Some_login_tricks

>>> Dan
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Re: http post request with authentication

[Ralph Mitchell]

On Mon, May 23, 2016 at 5:00 PM, Michael Pfeffer via curl-library <
curl-library@cool.haxx.se> wrote:

> At first i´m a newbie in using libcurl. I must login via http post
> (libcurl) to http://earthexplorer.usgs.gov and collect images. I use the
> POSTFIELDS data to set  search criteria but it doesnt seem to work. How can
> i  select a option? How can i select a inputfield without name?
> I even don't know if i ask the right questions. I used some other sides
> with get request, it worked fine.
>
> curl_easy_setopt(curl,CURLOPT_URL,"http://earthexplorer.usgs.gov;);
> curl_easy_setopt(curl,CURLOPT_USERPWD,"login:password");
>
> curl_easy_setopt(curl,CURLOPT_POSTFIELDS,"typeAddress=WRS1=3$rowAddress=3");
>

Is that really supposed to be "$rowAddress=3" instead of "=3"

Ralph Mitchell
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