Problem with posting the message using php

I have successfully come up to the access_token step along with final oauth_token and oauth_token_secret values.

Now I'm trying to access the Post method given by Yammer API with following request :

https://www.yammer.com/api/v1/messages/?
body=MyMessage&
oauth_consumer_key=Myconsumerkey&
oauth_nonce=1825bbc0f0a2875eb94bdb4d51c0638b&
oauth_signature=JzG4DCWxuP%2B7xT7u3tFZ2zCC8%2BI%3D&
oauth_signature_method=HMAC-SHA1&
oauth_timestamp=1257761059&
开发者_StackOverflowoauth_token=Myfinaloauthtoken&
oauth_version=1.0

But I'm getting "Invalid OAuth signature" error.

Can somebody help me in this.

Looks like you are missing %26 from the end of your signature. I realise this was an old post but did you manage to get a Yammer post message working?

You seem to have some strange characters in the oauth_signature:

JzG4DCWxuP %2B 7xT7u3tFZ2zCC8 %2B I %3D &

Check where those are coming from.

Tricky to say without seeing the code you're running, but check these things:

• are the post body parameters all included in the key/values use to generate the signature?
• are you including only the base URL in the signature base string? (i.e. the bit upto, but not including the '?')
• are you including the HTTP method (POST in this case) in the signature base string?