I am trying to read profile information of an twitter user withe the follwoing code
public String getUrl(){
String method = "GET";
String url = "https://api.twitter.com/1.1/users/lookup.json";
List<NameValuePair> urlParams = new ArrayList<NameValuePair>();
String screen_name="MyTailor";
urlParams.add( new NameValuePair("screen_name",screen_name));
String oAuthConsumerKey = "********";
String oAuthConsumerSecret = "**************"; //<--- DO NOT SHARE THIS VALUE
String oAuthAccessToken = "**********";/*"142334403-cw1jFc112rXzqWt3xwXr6LEDA8PxAIe9F4RSoOTR";*/
String oAuthAccessTokenSecret = "***********"; //<--DO NOT SHARE THIS VALUE
String oAuthNonce = String.valueOf(System.currentTimeMillis());
String oAuthSignatureMethod = "HMAC-SHA1";
String oAuthTimestamp =time();
String oAuthVersion = "1.0";
String signatureBaseString1 = method;
String signatureBaseString2 = url;
List<NameValuePair> allParams = new ArrayList<NameValuePair>();
allParams.add(new NameValuePair("oauth_consumer_key", oAuthConsumerKey));
allParams.add(new NameValuePair("oauth_nonce", oAuthNonce));
allParams.add(new NameValuePair("oauth_signature_method", oAuthSignatureMethod));
allParams.add(new NameValuePair("oauth_timestamp", oAuthTimestamp));
allParams.add(new NameValuePair("oauth_token", oAuthAccessToken));
allParams.add(new NameValuePair("oauth_version", oAuthVersion));
allParams.addAll(urlParams);
//
Collections.sort(allParams,new Comparator<NameValuePair>(){
public int compare(NameValuePair arg0, NameValuePair arg1) {
String name0 = arg0.getName();
String name1 = arg1.getName();
return name0.compareTo(name1);
}
});
StringBuffer signatureBaseString3 = new StringBuffer();
for(int i=0;i<allParams.size();i++)
{
NameValuePair nvp = allParams.get(i);
if (i>0) {
signatureBaseString3.append("&");
}
signatureBaseString3.append(nvp.getName() + "=" + nvp.getValue());
}
String signatureBaseStringTemplate = "%s&%s&%s";
String signatureBaseString = null;
try {
signatureBaseString = String.format(signatureBaseStringTemplate,
URLEncoder.encode(signatureBaseString1, "UTF-8"),
URLEncoder.encode(signatureBaseString2, "UTF-8"),
URLEncoder.encode(signatureBaseString3.toString(), "UTF-8"));
} catch (UnsupportedEncodingException ex) {
/*Logger.getLogger(TwitterOath.class.getName()).log(Level.SEVERE, null, ex);*/
}
System.out.println("signatureBaseString: "+signatureBaseString);
String compositeKey = null;
try {
compositeKey = URLEncoder.encode(oAuthConsumerSecret, "UTF-8") + "&" + URLEncoder.encode(oAuthAccessTokenSecret, "UTF-8");
} catch (UnsupportedEncodingException ex) {
}
String oAuthSignature = null;
try {
oAuthSignature = computeSignature(signatureBaseString, compositeKey);
} catch (GeneralSecurityException ex) {
} catch (UnsupportedEncodingException ex) {
} catch (Exception ex) {
}
System.out.println("oAuthSignature : "+oAuthSignature);
String oAuthSignatureEncoded = null;
try {
oAuthSignatureEncoded = URLEncoder.encode(oAuthSignature, "UTF-8");
} catch (UnsupportedEncodingException ex) {
}
String authorizationHeaderValueTempl = "OAuth oauth_consumer_key=\"%s\", oauth_nonce=\"%s\", oauth_signature=\"%s\", oauth_signature_method=\"%s\", oauth_timestamp=\"%s\", oauth_token=\"%s\", oauth_version=\"%s\"";
String authorizationHeaderValue = String.format(authorizationHeaderValueTempl,
oAuthConsumerKey,
oAuthNonce,
oAuthSignatureEncoded,
oAuthSignatureMethod,
oAuthTimestamp,
oAuthAccessToken,
oAuthVersion);
StringBuffer urlWithParams = new StringBuffer(url);
for(int i=0;i<urlParams.size();i++) {
if(i==0)
{
urlWithParams.append("?");
}
else
{
urlWithParams.append("&");
}
NameValuePair urlParam = urlParams.get(i);
urlWithParams.append(urlParam.getName() + "=" + urlParam.getValue());
}
System.out.println("urlWithParams: "+urlWithParams.toString());
System.out.println("authorizationHeaderValue:"+authorizationHeaderValue);
String[] code=new String[2];
code[0]=urlWithParams.toString();
code[1]=authorizationHeaderValue;
String finalUrl=urlWithParams.toString().concat(authorizationHeaderValue);
return finalUrl;
}
private String time() {
long millis = System.currentTimeMillis();
long secs = millis / 1000;
return String.valueOf( secs );
}
private static String computeSignature(String baseString, String keyString) throws GeneralSecurityException, UnsupportedEncodingException, Exception
{
SecretKey secretKey = null;
byte[] keyBytes = keyString.getBytes();
secretKey = new SecretKeySpec(keyBytes, "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(secretKey);
byte[] text = baseString.getBytes();
return new String(Base64.encodeBase64(mac.doFinal(text))).trim();
}
the result:
signatureBaseString: GET&https%3A%2F%2Fapi.twitter.com%2F1.1%2Fusers%2Flookup.json&oauth_consumer_key%3DEm8ihpf165mbFA8UBFJIHJUDs%26oauth_nonce%3D1424778603136%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1424778603%26oauth_token%3D142334403-cw1jFc112rXzqWt3xwXr6LEDA8PxAIe9F4RSoOTR%26oauth_version%3D1.0%26screen_name%3DMyTailor
oAuthSignature : mnL3xgLXA4krYVNn13V8+vIlv4A=
urlWithParams: https://api.twitter.com/1.1/users/lookup.json?screen_name=MyTailor
authorizationHeaderValue:OAuth oauth_consumer_key="EXXXXXXXXXXXXUDs", oauth_nonce="1424778603136", oauth_signature="mnL3xgLXA4krYVNn13V8%2BvIlv4A%3D", oauth_signature_method="HMAC-SHA1", oauth_timestamp="1424778603", oauth_token="142334403-cw1jFc112rXzqWt3xwXr6LEDA8PxAIe9F4RSoOTR", oauth_version="1.0"
Exception
java.net.UnknownHostException: www.api.twitter.com
Response:
{"errors":[{"code":215,"message":"Bad Authentication data."}]}
Help me, thanks in advance
