unable to add favourite recipe

[Ananda Krishna]

Hi,

I am using the following code to add a recipe to a particular user profile.

public static String computeHmac(String baseString, String key) throws Exception {

        SecretKeySpec secret = new SecretKeySpec(key.getBytes("UTF-8"), "HMAC-SHA1");

        Mac mac = Mac.getInstance("HmacSHA1");

        mac.init(secret);

        byte[] digest = mac.doFinal(baseString.getBytes("UTF-8"));

        return (new String(Base64.encodeBase64(digest)));

    }

    public static String encodeUrl(String web_url) throws Exception {

        String encodedReqUrl = URLEncoder.encode(web_url, "UTF-8");

        return (encodedReqUrl);

    }

    public static String randomString() {

        final String ALPHA_NUM = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

        StringBuilder sb = new StringBuilder(5);

        for (int i = 0; i < 5; i++) {

            int ndx = (int) (Math.random() * ALPHA_NUM.length());

            sb.append(ALPHA_NUM.charAt(ndx));

        }

        return (sb.toString());

    }

public static String addToFavouritesRecipeResultURL(String methodType, String token, long id, String Key) throws Exception {

        String outhSignature = "";

        String finalUrl = "";

        String parameters = "";

        String header = "GET";

        String encodedHeader = Hmac_signature.encodeUrl(header);

        String requestUrl = "http://platform.fatsecret.com/rest/server.api";

        String ecnodedUrl = Hmac_signature.encodeUrl(requestUrl);

        Long tstamp = System.currentTimeMillis() / 1000;

        int timestamp = tstamp.intValue();

        String nonce = Hmac_signature.randomString() + timestamp;

        parameters = "format=json&method=" + methodType + "&oauth_consumer_key=" + Key + "&oauth_nonce=" + nonce + "&oauth_signature_method=HMAC-SHA1&oauth_timestamp=" + timestamp + "&oauth_token=" + token + "&oauth_version=1.0&recipe_id=" + id;

        String encodedParm = Hmac_signature.encodeUrl(parameters.trim());

        String baseString = encodedHeader + "&" + ecnodedUrl + "&" + encodedParm;

        String consumerSecret = "xxxxxxx";

        String conkey = consumerSecret.concat("&");

        outhSignature = Hmac_signature.computeHmac(baseString, conkey);

        String encouthSignature = Hmac_signature.encodeUrl(outhSignature);

        String finalParam = "format=json&method=" + methodType + "&oauth_consumer_key=" + Key + "&oauth_nonce=" + nonce + "&oauth_signature=" + encouthSignature + "&oauth_signature_method=HMAC-SHA1&oauth_timestamp=" + timestamp + "&oauth_token=" + token + "&oauth_version=1.0&recipe_id=" + id;

        finalUrl = "http://platform.fatsecret.com/rest/server.api?" + finalParam;

        return (finalUrl);

    }

But i am getting invalid signature error .Kindly tell me where am i going wrong.

Regards,

Ananda Krishna S