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POLogging into Stack Overflow with cURL
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  1. POLogging into Stack Overflow with cURL
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    copied!<p>I'm working on a project and I want to log into Stack Overflow via cURL.</p> <p>I use Google as my openID provider which means that I need to log into Google first via its API.</p> <p>Here is the code I have so far:</p> <pre><code>#!/bin/sh . ./params.sh #the script with $username and $password curl --silent https://www.google.com/accounts/ClientLogin \ -d Email=$username -d Passwd=$password \ -d accountType=GOOGLE \ -d source=localhost-test-1 \ -d service=lso \ -o tokens . ./tokens echo $Auth; #$Auth is correct here - I did not get a BadAuth error. endpoint="https://www.google.com/accounts/o8/id"; curl http://stackoverflow.com/users/authenticate \ -d "openid_identifier=$endpoint" \ -w %{redirect_url}&gt; ./google_url google_url=$(cat ./google_url); echo $google_url; echo; echo; echo; curl -L --silent --header "Authorization: GoogleLogin auth=$Auth" $google_url; </code></pre> <p>At this point I get a page from Google telling me that Stack Overflow wants information and I have to log in. According to <a href="http://code.google.com/apis/gdata/articles/using_cURL.html" rel="nofollow noreferrer">this page</a>, the <code>--header ... $Auth</code> part should count as a login and redirect me to Stack Overflow.</p> <p>Here is the form I get when I run this script:</p> <pre><code>&lt;form id="gaia_universallogin" action="https://www.google.com/accounts/ServiceLoginAuth?service=lso" method="post"&gt; &lt;input type="hidden" name="continue" id="continue" value="https://www.google.com/accounts/o8/ud?st=SOME_KEY" /&gt; &lt;input type="hidden" name="service" id="service" value="lso" /&gt; &lt;input type="hidden" name="dsh" id="dsh" value="SOME_NEG_NUMBER" /&gt; &lt;/form&gt; </code></pre> <p>When I try the answer below I get the following error:</p> <pre><code> Can't call method "attr" on an undefined value at - line 8. curl: (3) &lt;url&gt; malformed --&gt;&lt;/style&gt; </code></pre> <p>here is the output from <code>google2.html</code></p> <pre><code>&lt;form id="gaia_loginform" action="https://www.google.com/accounts/ServiceLoginAuth?service=lso" method="post" &gt; &lt;input type="hidden" name="continue" id="continue" value="https://www.google.com/accounts/o8/ud?st=RNADOM" /&gt; &lt;input type="hidden" name="service" id="service" value="lso" /&gt; &lt;input type="hidden" name="dsh" id="dsh" value="NEG_NUMEBER" /&gt; &lt;input type="hidden" name="GALX" value="ABCD" /&gt; &lt;input type="text" name="Email" id="Email" /&gt; &lt;input type="password" name="Passwd" id="Passwd" &gt; &lt;input type="checkbox" name="PersistentCookie" id="PersistentCookie" value="yes" &lt;input type="hidden" name='rmShown' value="1" /&gt; &lt;input type="submit" class="gaia le button" name="signIn" id="signIn" /&gt; &lt;input type="hidden" name="asts" &gt; &lt;/form&gt; </code></pre>
 

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