com.magnet.max.android.rest.qos.internal.CacheUtils.java Source code

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Here is the source code for com.magnet.max.android.rest.qos.internal.CacheUtils.java

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/*
 * Copyright (c) 2015 Magnet Systems, 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 com.magnet.max.android.rest.qos.internal;

import android.util.Log;
import com.magnet.max.android.util.StringUtil;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.internal.Util;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import okio.Buffer;

public class CacheUtils {
    private static final String TAG = CacheUtils.class.getSimpleName();

    public static final int MAX_CONTENT_LENGTH_TO_HASH = 4 * 1024;

    public static String getRequestHash(Request request) {
        StringBuilder sb = new StringBuilder();
        //Method and URL
        sb.append(request.method()).append(request.urlString());
        //Headers
        if (null != request.headers()) {

        }
        //Body
        //Don't include body when it's multipart
        if (toHashBody(request)) {
            try {
                Buffer buffer = new Buffer();
                Request copy = request.newBuilder().build();
                copy.body().writeTo(buffer);
                sb.append(buffer.readUtf8());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return Util.md5Hex(sb.toString());
    }

    public static byte[] copyBody(Buffer buffer) {
        ByteArrayOutputStream os = null;
        try {
            os = new ByteArrayOutputStream();
            buffer.copyTo(os);
            return os.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != os) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return null;
    }

    private static boolean toHashBody(Request request) {
        if (null == request.body()) {
            return false;
        }

        if (null != request.body().contentType()) {
            String mediaType = request.body().contentType().type();
            if (StringUtil.isNotEmpty(mediaType)) {
                mediaType = mediaType.trim().toLowerCase();
                if ((mediaType.startsWith("multipart") || mediaType.startsWith("image")
                        || mediaType.startsWith("video") || mediaType.startsWith("audio"))) {
                    return false;
                }
            }
        }

        try {
            long length = request.body().contentLength();
            if (length > MAX_CONTENT_LENGTH_TO_HASH) {
                return false;
            }
        } catch (IOException e) {
            Log.e(TAG, "Failed to get body length", e);
            return false;
        }

        return true;
    }
}