Signature_invalid error from oAuth while querying for Google Request Token in IOS

Question

I'm using oAuth to get request Token for unregistered installed app for "latitude" scope of google, i'm getting the response string as

signature_invalid
base_string:GET&https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthGetRequestToken&oauth_consumer_key%3Danonymous%26oauth_nonce%3D1D759072-DB2B-4E21-AA23-67CADF98C14A%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1306734462%26oauth_version%3D1.0%26scope%3Dhttps%253A%252F%252Fwww.googleapis.com%252Fauth%252Flatitude%26xoauth_displayname%3DTaj%2520Vivanta

The code i used to get request token is as follows

    OAConsumer *consumer = [[OAConsumer alloc] initWithKey:@"anonymous" secret:@"anonymous"]; 
    OAMutableURLRequest *request = [[[OAMutableURLRequest alloc] initWithURL:url consumer: consumer token:token realm:nil signatureProvider: nil] autorelease];
    if (!request) return;
    [request setOAuthParameterName:@"scope" withValue:[@"https://www.googleapis.com/auth/latitude" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    [request setOAuthParameterName:@"xoauth_displayname" withValue:@"Taj Vivanta"];
    [request setHTTPMethod: @"GET"];
    OADataFetcher *fetcher = [[[OADataFetcher alloc] init] autorelease];    
    [fetcher fetchDataWithRequest: request delegate: self didFinishSelector: success didFailSelector: fail];

Please help me to fix this, thank you

pradeepa pradeepa · Accepted Answer · 2011-05-30T07:44:52

As clearly suggested by google Document the scope and xoauth_displayname parameters should in the URL but in the above code i was placing these parameters in the request header.

Signature_invalid error from oAuth while querying for Google Request Token in IOS

1 Answers