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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 java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.UnsupportedCharsetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
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:42.0) Gecko/20100101 Firefox/42.0";
private static HttpURLConnection prepareHttpConnection(String url, Map<String, String> headers)
throws IOException {
// open connection
HttpURLConnection urlConnection = (HttpURLConnection) new URL(url).openConnection();
// set user agent (default value is null)
urlConnection.setRequestProperty("User-Agent", USER_AGENT);
// set all other headers if not null
if (headers != null) {
for (Map.Entry<String, String> header : headers.entrySet()) {
urlConnection.setRequestProperty(header.getKey(), header.getValue());
}
}
return urlConnection;
}
private static byte[] httpFetch(HttpURLConnection urlConnection) throws IOException {
// query url, read and return buffered response body
// we want to make sure that the connection gets closed here
InputStream is = new BufferedInputStream(urlConnection.getInputStream());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] result = null;
try {
byte[] partial = new byte[4096];
int read;
while ((read = is.read(partial, 0, 4096)) != -1) {
baos.write(partial, 0, read);
}
result = baos.toByteArray();
} finally {
is.close();
baos.close();
}
return result;
}
private static Charset determineCharset(HttpURLConnection connection) {
String contentType = connection.getContentType();
if (contentType != null) {
String[] split = contentType.split(";");
for (int i = 0; i < split.length; i++) {
String trimmed = split[i].trim();
if (trimmed.startsWith("charset=")) {
try {
return Charset.forName(trimmed.substring(8));
} catch (IllegalCharsetNameException | UnsupportedCharsetException e) {
// we don't know about this charset -> ignore
}
}
}
}
return Charset.defaultCharset();
}
public static String httpGet(String url, Map<String, String> headers) throws IOException {
HttpURLConnection connection = prepareHttpConnection(url, headers);
try {
byte[] response = httpFetch(connection);
return new String(response, determineCharset(connection));
} finally {
connection.disconnect();
}
}
public static byte[] httpGetBytes(String url, Map<String, String> headers) throws IOException {
HttpURLConnection connection = prepareHttpConnection(url, headers);
try {
return httpFetch(connection);
} finally {
connection.disconnect();
}
}
public static String httpPost(String url, Map<String, String> headers, String postData)
throws IOException {
HttpURLConnection connection = prepareHttpConnection(url, headers);
try {
// write postData to buffered output stream
if (postData != null) {
connection.setDoOutput(true);
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
connection.getOutputStream()));
try {
bw.write(postData, 0, postData.length());
// close connection and re-throw exception
} finally {
bw.close();
}
}
byte[] response = httpFetch(connection);
return new String(response, determineCharset(connection));
} finally {
connection.disconnect();
}
}
public static List<String> allRegexResults(String input, String regex, boolean dotall) {
if (input == null) {
return null;
}
Pattern pattern = Pattern.compile(regex, dotall ? Pattern.DOTALL : 0);
Matcher matcher = pattern.matcher(input);
List<String> regexResults = new ArrayList<String>();
while (matcher.find()) {
regexResults.add(matcher.group(1).trim());
}
return regexResults;
}
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();
}
}
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