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POInvalid OAuth Signature returned while using Yammer Api
 

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  1. POInvalid OAuth Signature returned while using Yammer Api
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    <p>I am trying to write a small webapp that pulls data from Yammer. I have to go through Yammer's OAuth bridge to access their data. I tried using the <a href="http://oauth.googlecode.com/svn/code/php/" rel="nofollow noreferrer">Oauth php library</a> and do the 3 way handshake. But at the last step, I get an error stating I have an invalid OAuth Signature. </p> <p>Here are the series of steps:</p> <ol> <li><p>The first part involves getting the request Token URL and these are the query parameters that I pass.</p> <pre><code> [oauth_version] =&gt; 1.0 [oauth_nonce] =&gt; 4e495b6a5864f5a0a51fecbca9bf3c4b [oauth_timestamp] =&gt; 1256105827 [oauth_consumer_key] =&gt; my_consumer_key [oauth_signature_method] =&gt; HMAC-SHA1 [oauth_signature] =&gt; FML2eacPNH6HIGxJXnhwQUHPeOY= </code></pre></li> <li><p>Once this step is complete, I get the request Token as follows:</p> <p>[oauth_token] => 6aMcbRK5wMqHgZQsdfsd [oauth_token_secret] => ro8AJxZ67sUDoiOTk8sl4V3js0uyof1uPJVB14asdfs [oauth_callback_confirmed] => true</p></li> <li><p>I then try to authorize the given token and token secret by passing the parameters to the authorize url.It takes me to Yammer's authentication page where I have allow my app to talk to Yammer. </p></li> <li><p>Yammer then gives me a 4 digit code that I have to put back into my application which then tries to acquire the permanent access token. I pass the following information to the access token URL:</p> <pre><code> [oauth_version] =&gt; 1.0 [oauth_nonce] =&gt; 52b22495ecd9eba277c1ce6b97b00fdc [oauth_timestamp] =&gt; 1256106815 [oauth_consumer_key] =&gt; myconsumerkey [callback_token] =&gt; 61A7 [oauth_token] =&gt; 6aMcbRK5wMqHgZQsdfsd [oauth_token_secret] =&gt; ro8AJxZ67sUDoiOTk8sl4V3js0uyof1uPJVB14asdfs [oauth_callback_confirmed] =&gt; true [oauth_signature_method] =&gt; HMAC-SHA1 [oauth_signature] =&gt; V9YcMDq2rP7OiZTK1k5kb/otMzA= </code></pre></li> <li><p>Here I am supposed to receive the Oauth Permanent access token, but instead I get a <strong>Invalid Oauth signature</strong>. I dont know what I am doing wrong. I use the same signaures to sign the request. Should I sign the request using the new token and secret? I tried that as well but to no avail. I even tried implementing this in java using <a href="http://code.google.com/p/oauth-signpost/" rel="nofollow noreferrer">signpost library</a> and got stuck at the exact same place. Help Help!!</p></li> </ol>
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