Вот мой код для Flickr OAuth. ВНИМАНИЕ: Я ссылался на логику из SignPost. Это действительно очень сложно сгенерировать подпись .... ОК. Это просто пример для генерации "oauth_signature"
package oauthflickr;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIUtils;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
/**
* a simple program to get flickr token and token secret.
*
* @author Mark Zang
*
*/
public class OAuthForFlickr {
private static String key = "_________________________";
private static String secret = "___________";
private static final String HMAC_SHA1 = "HmacSHA1";
private static final String ENC = "UTF-8";
private static Base64 base64 = new Base64();
/**
*
* @param url
* the url for "request_token" URLEncoded.
* @param params
* parameters string, URLEncoded.
* @return
* @throws UnsupportedEncodingException
* @throws NoSuchAlgorithmException
* @throws InvalidKeyException
*/
private static String getSignature(String url, String params)
throws UnsupportedEncodingException, NoSuchAlgorithmException,
InvalidKeyException {
/**
* base has three parts, they are connected by "&": 1) protocol 2) URL
* (need to be URLEncoded) 3) Parameter List (need to be URLEncoded).
*/
StringBuilder base = new StringBuilder();
base.append("GET&");
base.append(url);
base.append("&");
base.append(params);
System.out.println("Stirng for oauth_signature generation:" + base);
// yea, don't ask me why, it is needed to append a "&" to the end of
// secret key.
byte[] keyBytes = (secret + "&").getBytes(ENC);
SecretKey key = new SecretKeySpec(keyBytes, HMAC_SHA1);
Mac mac = Mac.getInstance(HMAC_SHA1);
mac.init(key);
// encode it, base64 it, change it to string and return.
return new String(base64.encode(mac.doFinal(base.toString().getBytes(
ENC))), ENC).trim();
}
/**
* @param args
* @throws IOException
* @throws ClientProtocolException
* @throws URISyntaxException
* @throws NoSuchAlgorithmException
* @throws InvalidKeyException
*/
public static void main(String[] args) throws ClientProtocolException,
IOException, URISyntaxException, InvalidKeyException,
NoSuchAlgorithmException {
HttpClient httpclient = new DefaultHttpClient();
List<NameValuePair> qparams = new ArrayList<NameValuePair>();
// These params should ordered in key
qparams.add(new BasicNameValuePair("oauth_callback", "oob"));
qparams.add(new BasicNameValuePair("oauth_consumer_key", key));
qparams.add(new BasicNameValuePair("oauth_nonce", ""
+ (int) (Math.random() * 100000000)));
qparams.add(new BasicNameValuePair("oauth_signature_method",
"HMAC-SHA1"));
qparams.add(new BasicNameValuePair("oauth_timestamp", ""
+ (System.currentTimeMillis() / 1000)));
qparams.add(new BasicNameValuePair("oauth_version", "1.0"));
// generate the oauth_signature
String signature = getSignature(URLEncoder.encode(
"http://www.flickr.com/services/oauth/request_token", ENC),
URLEncoder.encode(URLEncodedUtils.format(qparams, ENC), ENC));
// add it to params list
qparams.add(new BasicNameValuePair("oauth_signature", signature));
// generate URI which lead to access_token and token_secret.
URI uri = URIUtils.createURI("http", "www.flickr.com", -1,
"/services/oauth/request_token",
URLEncodedUtils.format(qparams, ENC), null);
System.out.println("Get Token and Token Secrect from:"
+ uri.toString());
HttpGet httpget = new HttpGet(uri);
// output the response content.
System.out.println("oken and Token Secrect:");
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
int len;
byte[] tmp = new byte[2048];
while ((len = instream.read(tmp)) != -1) {
System.out.println(new String(tmp, 0, len, ENC));
}
}
}
}