com.github.scribejava.apis.odnoklassniki.OdnoklassnikiOAuthService Maven / Gradle / Ivy

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package com.github.scribejava.apis.odnoklassniki;

import com.github.scribejava.apis.OdnoklassnikiApi;
import com.github.scribejava.core.httpclient.HttpClient;
import com.github.scribejava.core.httpclient.HttpClientConfig;
import com.github.scribejava.core.model.OAuthRequest;
import com.github.scribejava.core.model.Parameter;
import com.github.scribejava.core.model.ParameterList;
import com.github.scribejava.core.oauth.OAuth20Service;

import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.Formatter;
import java.util.List;

public class OdnoklassnikiOAuthService extends OAuth20Service {

    public OdnoklassnikiOAuthService(OdnoklassnikiApi api, String apiKey, String apiSecret, String callback,
            String defaultScope, String responseType, OutputStream debugStream, String userAgent,
            HttpClientConfig httpClientConfig, HttpClient httpClient) {
        super(api, apiKey, apiSecret, callback, defaultScope, responseType, debugStream, userAgent, httpClientConfig,
                httpClient);
    }

    @Override
    public void signRequest(String accessToken, OAuthRequest request) {
        //sig = lower(md5( sorted_request_params_composed_string + md5(access_token + application_secret_key)))
        try {
            final String tokenDigest = md5(accessToken + getApiSecret());

            final ParameterList queryParams = request.getQueryStringParams();
            queryParams.addAll(request.getBodyParams());
            final List allParams = queryParams.getParams();

            Collections.sort(allParams);

            final StringBuilder stringParams = new StringBuilder();
            for (Parameter param : allParams) {
                stringParams.append(param.getKey())
                        .append('=')
                        .append(param.getValue());
            }

            final String sigSource = URLDecoder.decode(stringParams.toString(), "UTF-8") + tokenDigest;
            request.addQuerystringParameter("sig", md5(sigSource).toLowerCase());

            super.signRequest(accessToken, request);
        } catch (UnsupportedEncodingException unex) {
            throw new IllegalStateException(unex);
        }
    }

    public static String md5(String orgString) {
        try {
            final MessageDigest md = MessageDigest.getInstance("MD5");
            final byte[] array = md.digest(orgString.getBytes(Charset.forName("UTF-8")));
            final Formatter builder = new Formatter();
            for (byte b : array) {
                builder.format("%02x", b);
            }
            return builder.toString();
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalStateException("MD5 is unsupported?", e);
        }
    }
}