I am trying to use 3 legged sign with twitter for I am steps are as follows:
I am able to get request token:
private String getRequestToken() throws Exception {
String url = "https://api.twitter.com/oauth/request_token";
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
String get_or_post = "POST";
String oauth_signature_method = "HMAC-SHA1";
String uuid_string = UUID.randomUUID().toString();
uuid_string = uuid_string.replaceAll("-", "");
String oauth_nonce = uuid_string;
Calendar tempcal = Calendar.getInstance();
long ts = tempcal.getTimeInMillis();// get current time in milliseconds
String oauth_timestamp = (new Long(ts / 1000)).toString();
String parameter_string = "oauth_consumer_key=" + twitter_consumer_key + "&oauth_nonce=" + oauth_nonce
+ "&oauth_signature_method=" + oauth_signature_method + "&oauth_timestamp=" + oauth_timestamp
+ "&oauth_version=1.0";
System.out.println("parameter_string=" + parameter_string);
String twitter_endpoint = "https://api.twitter.com/oauth/request_token";
String signature_base_string = get_or_post + "&" + encode(twitter_endpoint) + "&" + encode(parameter_string);
String oauth_signature = "";
try {
oauth_signature = computeSignature(signature_base_string, twitter_consumer_secret + "&");
} catch (GeneralSecurityException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String authorization_header_string = "OAuth oauth_consumer_key=\"" + twitter_consumer_key
+ "\",oauth_signature_method=\"HMAC-SHA1\",oauth_timestamp=\"" + oauth_timestamp + "\",oauth_nonce=\""
+ oauth_nonce + "\",oauth_version=\"1.0\",oauth_signature=\"" + encode(oauth_signature) + "\"";
System.out.println("authorization_header_string=" + authorization_header_string);
// add reuqest header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
con.setRequestProperty("Authorization", authorization_header_string);
System.out.println("---------------------------------------");
System.out.println(authorization_header_string);
System.out.println("---------------------------------------");
// Send post request
con.setDoOutput(true);
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// print result
System.out.println(response.toString());
String[] twitterResponse = response.toString().split("&");
oauth_token = twitterResponse[0].substring(twitterResponse[0].indexOf("=") + 1);
oauth_token_secret = twitterResponse[1].substring(twitterResponse[1].indexOf("=") + 1);
oauth_callback_confirmed = twitterResponse[2].substring(twitterResponse[2].indexOf("=") + 1);
return response.toString();
}
its response is coming fine; 5th step is giving an extra information i.e. x_auth_expires=0 which means that the token received is expired. because of which my next is not working fine here is my code to fetch access_token
public String getAccessToken(HttpServletRequest req) throws Exception {
String url = "https://api.twitter.com/oauth/access_token";
String oauthToken = (String) req.getParameter("oauth_token");
String oauth_verifier = (String) req.getParameter("oauth_verifier");
System.out.println("oauthToken----------"+oauthToken);
System.out.println("oauth_verifier-----------"+oauth_verifier);
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
String get_or_post = "POST";
String oauth_signature_method = "HMAC-SHA1";
String uuid_string = UUID.randomUUID().toString();
uuid_string = uuid_string.replaceAll("-", "");
String oauth_nonce = uuid_string;
Calendar tempcal = Calendar.getInstance();
long ts = tempcal.getTimeInMillis();
String oauth_timestamp = (new Long(ts / 1000)).toString();
String parameter_string = "oauth_consumer_key=" + twitter_consumer_key + "&oauth_nonce=" + oauth_nonce
+ "&oauth_signature_method=" + oauth_signature_method + "&oauth_timestamp=" + oauth_timestamp
+ "&oauth_token=" + oauthToken + "&oauth_version=1.0";
System.out.println("parameter_string=" + parameter_string);
String twitter_endpoint = "https://api.twitter.com/oauth/request_token";
String signature_base_string = get_or_post + "&" + encode(twitter_endpoint) + "&" + encode(parameter_string);
String oauth_signature = "";
try {
oauth_signature = computeSignature(signature_base_string, twitter_consumer_secret + "&");
} catch (GeneralSecurityException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String authorization_header_string = "OAuth oauth_consumer_key=\"" + twitter_consumer_key
+ "\",oauth_signature_method=\"HMAC-SHA1\",oauth_timestamp=\"" + oauth_timestamp + "\",oauth_nonce=\""
+ oauth_nonce + "\",oauth_token=\"" + oauthToken + "\",oauth_version=\"1.0\",oauth_signature=\""
+ encode(oauth_signature) + "\"";
System.out.println("authorization_header_string=" + authorization_header_string);
String urlParameters = "oauth_verifier=" + oauth_verifier;
// add reuqest header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
con.setRequestProperty("Authorization", authorization_header_string);
System.out.println("---------------------------------------");
System.out.println(authorization_header_string);
System.out.println("---------------------------------------");
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// print result
System.out.println(response.toString());
String[] responseOauthToken=response.toString().split("&");
String oauth_token=responseOauthToken[0].substring(responseOauthToken[0].indexOf("=")+1);
String screenname=responseOauthToken[3].substring(responseOauthToken[3].indexOf("=")+1);
System.out.println("oauth_token---------"+oauth_token);
System.out.println("screenname---------"+screenname);
getProfile(oauth_token,screenname);
return "";
}
Code for verifying a profile:
public void getProfile(String oauthToken,String screenname) throws Exception {
String url = "https://api.twitter.com/1.1/account/verify_credentials.json";
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
String get_or_post = "GET";
String oauth_signature_method = "HMAC-SHA1";
String uuid_string = UUID.randomUUID().toString();
uuid_string = uuid_string.replaceAll("-", "");
String oauth_nonce = uuid_string;
Calendar tempcal = Calendar.getInstance();
long ts = tempcal.getTimeInMillis();
String oauth_timestamp = (new Long(ts / 1000)).toString();
String parameter_string = "oauth_consumer_key=" + twitter_consumer_key + "&oauth_nonce=" + oauth_nonce
+ "&oauth_signature_method=" + oauth_signature_method + "&oauth_timestamp=" + oauth_timestamp
+"&screen_name="+screenname+"&oauth_token="+oauthToken
+ "&oauth_version=1.0";
System.out.println("parameter_string=" + parameter_string);
String twitter_endpoint = "https://api.twitter.com/1.1/account/verify_credentials.json";
String signature_base_string = get_or_post + "&" + encode(twitter_endpoint) + "&" + encode(parameter_string);
String oauth_signature = "";
try {
oauth_signature = computeSignature(signature_base_string, twitter_consumer_secret + "&");
} catch (GeneralSecurityException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
String authorization_header_string = "OAuth oauth_consumer_key=\"" + twitter_consumer_key
+ "\",oauth_signature_method=\"HMAC-SHA1\",oauth_timestamp=\"" + oauth_timestamp + "\",oauth_nonce=\""
+ oauth_nonce +"\",oauth_token=\""+oauthToken+ "\",oauth_version=\"1.0\",oauth_signature=\"" + encode(oauth_signature) + "\"";
System.out.println("authorization_header_string=" + authorization_header_string);
// add reuqest header
con.setRequestMethod("GET");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
con.setRequestProperty("Authorization", authorization_header_string);
System.out.println("---------------------------------------");
System.out.println(authorization_header_string);
System.out.println("---------------------------------------");
// Send post request
con.setDoOutput(true);
int responseCode = con.getResponseCode();
System.out.println("\nSending '"+get_or_post+"' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// print result
System.out.println(response.toString());
}
When x_auth_expires is 0, it means that your access token doesn't have an expiration so I don't believe that is your problem.
Your problem (hopefully the only one) appears to be on this line in getProfile():
oauth_signature = computeSignature(signature_base_string, twitter_consumer_secret + "&");
You should be signing with the consumer secret plus the access token secret (joined by '&') but you are only using the consumer secret. It appears that you aren't even extracting oauth_token_secret when you receive and extract the access token (the access oauth_token_secret is not the same as the request oauth_token_secret).
I also note that you are currently extracting oauth_token and screen_name from the response by index. While the ordering of properties seems consistent, it would be safest to get them by name.
Actually I do see another issue. In getProfile(), screen_name should not be included in your parameter string because it is not a parameter, and if it were it would need to be in lexicographic order.