org.opensocial.auth.OAuthScheme.java Source code

Introduction

Here is the source code for org.opensocial.auth.OAuthScheme.java

Source

/* Copyright (c) 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.opensocial.auth;

import net.oauth.OAuthAccessor;
import net.oauth.OAuthException;
import net.oauth.OAuthMessage;
import net.oauth.ParameterStyle;
import net.oauth.http.HttpMessage;

import org.apache.commons.codec.binary.Base64;
import org.opensocial.RequestException;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;

abstract class OAuthScheme implements Serializable {

    protected String consumerKey;
    protected String consumerSecret;

    protected OAuthScheme() {
    }

    public OAuthScheme(String consumerKey, String consumerSecret) {
        this.consumerKey = consumerKey;
        this.consumerSecret = consumerSecret;
    }

    public String getConsumerKey() {
        return consumerKey;
    }

    public String getConsumerSecret() {
        return consumerSecret;
    }

    protected InputStream byteArrayToStream(byte[] bytes) {
        InputStream stream = null;

        if (bytes != null) {
            stream = new ByteArrayInputStream(bytes);
        }

        return stream;
    }

    protected HttpMessage getHttpMessage(OAuthMessage message, OAuthAccessor accessor, byte[] body,
            boolean signBodyHash) throws IOException, RequestException {
        if (body != null) {
            if (signBodyHash) {
                try {
                    MessageDigest md = MessageDigest.getInstance("SHA-1");

                    byte[] hash = md.digest(body);
                    byte[] encodedHash = new Base64().encode(hash);

                    message.addParameter("oauth_body_hash", new String(encodedHash, "UTF-8"));
                } catch (java.security.NoSuchAlgorithmException e) {
                    // Ignore exception
                } catch (java.io.UnsupportedEncodingException e) {
                    // Ignore exception
                }
            } else if (message.getHeader(HttpMessage.CONTENT_TYPE).equals("application/x-www-form-urlencoded")) {
                message.addParameter(byteArrayToString(body), "");
            }
        }

        try {
            message.addRequiredParameters(accessor);
        } catch (OAuthException e) {
            throw new RequestException("OAuth error thrown while signing request " + e.getMessage());
        } catch (java.net.URISyntaxException e) {
            throw new RequestException("Malformed request URL " + message.URL + " could not be signed");
        }

        return HttpMessage.newRequest(message, ParameterStyle.QUERY_STRING);
    }

    private String byteArrayToString(byte[] bytes) {
        try {
            return new String(bytes, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            // Ignore
            return null;
        }
    }
}