this is my code to get yahoo contacts in android .
i m able to get upto access token but while making GET request for contacts im getting signature invalid error.
i searched a lot but i couldnt found what im doing wrong. so anyone give me a hand.
public class YahooContacts extends BaseActivity {
private final String TAG = "yahoo_auth";
private static final String CONSUMER_KEY = "My_consumer_key";
private static final String CONSUMER_SECRET = "my_consumer_secret";
private static final String CALLBACK_SCHEME = "http";
private static final String CALLBACK_HOST = "www.something_unique_here.com";
private static final String CALLBACK_URL = CALLBACK_SCHEME + "://"
+ CALLBACK_HOST;
private String AUTH_TOKEN = null;
private String AUTH_TOKEN_SECRET = null;
private String AUTH_URL = null;
private String USER_TOKEN = null;
private String ACCESS_TOKEN = null;
private String mUSER_GUID = null;
private WebView mWebview;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yahoo_layout);
mWebview = (WebView) findViewById(R.id.webview);
new getContactsTask().execute();
}
class getContactsTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
getAuthorizationToken();
getUserAutherization();
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}
private void getAuthorizationToken() {
String requestPath = "https://api.login.yahoo.com/oauth/v2/get_request_token?oauth_consumer_key="
+ CONSUMER_KEY
+ "&oauth_nonce="
+ System.currentTimeMillis()
+ "x"
+ "&oauth_signature_method=PLAINTEXT"
+ "&oauth_signature="
+ CONSUMER_SECRET
+ "%26"
+ "&oauth_timestamp="
+ System.currentTimeMillis()
+ "&oauth_version=1.0"
+ "&xoauth_lang_pref=en-us"
+ "&oauth_callback=" + CALLBACK_URL;
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(requestPath);
try {
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
String[] data = responseBody.split("&");
AUTH_TOKEN = data[0].replace("oauth_token=", "");
AUTH_TOKEN_SECRET = data[1].replace("oauth_token_secret=", "");
AUTH_URL = data[3].replace("xoauth_request_auth_url=", "");
VIPLogger.info(TAG, "authToken" + AUTH_TOKEN);
VIPLogger.info(TAG, "authToken secret" + AUTH_TOKEN_SECRET);
} catch (Exception e) {
e.printStackTrace();
}
}
private void getUserAutherization() {
mWebview.getSettings().setJavaScriptEnabled(true);
mWebview.setWebViewClient(lWebviewClient);
mWebview.loadUrl("https://api.login.yahoo.com/oauth/v2/request_auth?oauth_token="
+ AUTH_TOKEN);
}
private void getAccessToken() {
String requestPath = "https://api.login.yahoo.com/oauth/v2/get_token?oauth_consumer_key="
+ CONSUMER_KEY
+ "&oauth_nonce="
+ System.currentTimeMillis()
+ "x"
+ "&oauth_signature_method=PLAINTEXT"
+ "&oauth_signature="
+ CONSUMER_SECRET
+ "%26"
+ AUTH_TOKEN_SECRET
+ "&oauth_timestamp="
+ System.currentTimeMillis()
+ "&oauth_version=1.0"
+ "&oauth_token="
+ AUTH_TOKEN
+ "&oauth_verifier="
+ USER_TOKEN;
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(requestPath);
try {
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
String[] data = responseBody.split("&");
ACCESS_TOKEN = data[0].replace("oauth_token=", "");
mUSER_GUID = data[5].replace("xoauth_yahoo_guid=", "");
VIPLogger.info(TAG, "user guid: " + mUSER_GUID);
VIPLogger.info(TAG, "Access token: " + ACCESS_TOKEN);
getAllContacts();
} catch (Exception e) {
e.printStackTrace();
VIPLogger.error(TAG,
"error while fetching user guid and access token");
}
}
WebViewClient lWebviewClient = new WebViewClient() {
public void onPageStarted(WebView view, String url,
android.graphics.Bitmap favicon) {
if (url.contains("vipitservice")) {
mWebview.stopLoading();
int lastIndex = url.lastIndexOf("=") + 1;
VIPLogger.info(TAG, url.substring(lastIndex, url.length()));
USER_TOKEN = url.substring(lastIndex, url.length());
mWebview.setVisibility(View.GONE);
getAccessToken();
}
};
};
private void getAllContacts() {
HttpClient httpclient = new DefaultHttpClient();
String host_url = "http://social.yahooapis.com/v1/user/" + mUSER_GUID+ "/contacts";
String nonce = ""+System.currentTimeMillis();
String timeStamp = ""+(System.currentTimeMillis()/1000L);
try{
String params = "?realm=yahooapis.com"
+ "&oauth_consumer_key=" + CONSUMER_KEY
+ "&oauth_nonce="+nonce
+ "&oauth_signature_method="+"HMAC-SHA1"
+ "&oauth_timestamp="+timeStamp
+ "&oauth_token="+URLDecoder.decode(ACCESS_TOKEN,"utf-8")
+ "&oauth_version=1.0"
;
String baseString = "GET&"+encode(host_url)+encode(params);
String signingKey = encode(CONSUMER_SECRET)+"&"+encode(AUTH_TOKEN_SECRET);
VIPLogger.info(TAG, "base string: " + baseString);
String lSignature = computeHmac(baseString, signingKey);
VIPLogger.info(TAG, "signature: " + lSignature);
lSignature = encode(lSignature);
VIPLogger.info(TAG, "signature enacoded: " + lSignature);
String lRequestUrl = host_url
+ "?realm=yahooapis.com"
+ "&oauth_consumer_key="+CONSUMER_KEY
+ "&oauth_nonce="+nonce
+ "&oauth_signature_method=HMAC-SHA1"
+ "&oauth_timestamp="+timeStamp
+ "&oauth_token="+ACCESS_TOKEN
+ "&oauth_version=1.0"
+ "&oauth_signature="+lSignature
;
VIPLogger.info(TAG, lRequestUrl.substring(1202));
HttpGet httpget = new HttpGet(lRequestUrl);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
VIPLogger.info(TAG, "contacts response: " + responseBody);
}catch(Exception e){
e.printStackTrace();
VIPLogger.error(TAG, "error while fetching user contacts");
}
}
public String computeHmac(String baseString, String key) {
try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec signingKey = new SecretKeySpec(key.getBytes("UTF-8"),
"HMAC-SHA1");
mac.init(signingKey);
byte[] digest = mac.doFinal(baseString.getBytes());
String result = Base64.encodeToString(digest, Base64.URL_SAFE);
return result;
} catch (Exception e) {
e.printStackTrace();
VIPLogger.error(TAG, "error while generating sha");
}
return null;
}
public String encodeURIComponent(final String value) {
if (value == null) {
return "";
}
try {
return URLEncoder.encode(value, "utf-8")
// OAuth encodes some characters differently:
.replace("+", "%20").replace("*", "%2A")
.replace("%7E", "~");
// This could be done faster with more hand-crafted code.
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
public String encode(String input) {
StringBuilder resultStr = new StringBuilder();
for (char ch : input.toCharArray()) {
if (isUnsafe(ch)) {
resultStr.append('%');
resultStr.append(toHex(ch / 16));
resultStr.append(toHex(ch % 16));
} else {
resultStr.append(ch);
}
}
return resultStr.toString().trim();
}
private char toHex(int ch) {
return (char) (ch < 10 ? '0' + ch : 'A' + ch - 10);
}
private boolean isUnsafe(char ch) {
if (ch > 128 || ch < 0)
return true;
return " %$&+,/:;=?@<>#%".indexOf(ch) >= 0;
}
}
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