another twitter oAuth cURL access token request that fails

Question

The following function gives a validation error instead of the token:

failed to validate oAuth signature and token

Answer 1

I faced same issue, what I was missing is passing header in to the curl request. As shown in this question, I was also sending the $header = array('Expect:'), which was the problem in my case. I started sending signature in header with other data as below and it solved the case for me.

$header = calculateHeader($parameters, 'https://api.twitter.com/oauth/request_token');

function calculateHeader(array $parameters, $url)
    {
        // redefine
        $url = (string) $url;

        // divide into parts
        $parts = parse_url($url);

        // init var
        $chunks = array();

        // process queries
        foreach($parameters as $key => $value) $chunks[] = str_replace('%25', '%', urlencode_rfc3986($key) . '="' . urlencode_rfc3986($value) . '"');

        // build return
        $return = 'Authorization: OAuth realm="' . $parts['scheme'] . '://' . $parts['host'] . $parts['path'] . '", ';
        $return .= implode(',', $chunks);

        // prepend name and OAuth part
        return $return;
    }

function urlencode_rfc3986($value)
    {
        if(is_array($value)) return array_map('urlencode_rfc3986', $value);
        else
        {
            $search = array('+', ' ', '%7E', '%');
            $replace = array('%20', '%20', '~', '%25');

            return str_replace($search, $replace, urlencode($value));
        }
    }