src/com/android/dialer/lookup/LookupUtils.java


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/*
 * Copyright (C) 2014 The CyanogenMod Project
 *
 * 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.android.dialer.lookup;

import android.text.Html;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class LookupUtils {
    private static final String USER_AGENT =
            "Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0";

    public static String httpGet(HttpGet request) throws IOException {
        HttpClient client = new DefaultHttpClient();

        request.setHeader("User-Agent", USER_AGENT);

        HttpResponse response = client.execute(request);
        int status = response.getStatusLine().getStatusCode();

        // Android's org.apache.http doesn't have the RedirectStrategy class
        if (status == HttpStatus.SC_MOVED_PERMANENTLY
                || status == HttpStatus.SC_MOVED_TEMPORARILY) {
            Header[] headers = response.getHeaders("Location");

            if (headers != null && headers.length != 0) {
                HttpGet newGet = new HttpGet(headers[headers.length - 1].getValue());
                for (Header header : request.getAllHeaders()) {
                    newGet.addHeader(header);
                }
                return httpGet(newGet);
            } else {
                throw new IOException("Empty redirection header");
            }
        }

        if (status != HttpStatus.SC_OK) {
            throw new IOException("HTTP failure (status " + status + ")");
        }

        return EntityUtils.toString(response.getEntity());
    }

    public static String firstRegexResult(String input, String regex, boolean dotall) {
        if (input == null) {
            return null;
        }
        Pattern pattern = Pattern.compile(regex, dotall ? Pattern.DOTALL : 0);
        Matcher m = pattern.matcher(input);
        return m.find() ? m.group(1).trim() : null;
    }

    public static String fromHtml(String input) {
        if (input == null) {
            return null;
        }
        return Html.fromHtml(input).toString().trim();
    }
}