Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2011 ZXing authors
 *
 * 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.
 */

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;

import java.net.URLConnection;

public class Main {
    private static CharSequence consume(URLConnection connection, int maxChars) throws IOException {
        String encoding = getEncoding(connection);
        StringBuilder out = new StringBuilder();
        Reader in = null;
        try {
            in = new InputStreamReader(connection.getInputStream(), encoding);
            char[] buffer = new char[1024];
            int charsRead;
            while (out.length() < maxChars && (charsRead = in.read(buffer)) > 0) {
                out.append(buffer, 0, charsRead);
            }
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException ioe) {
                    // continue
                } catch (NullPointerException ioe) {
                    // continue
                }
            }
        }
        return out;
    }

    private static String getEncoding(URLConnection connection) {
        String contentTypeHeader = connection.getHeaderField("Content-Type");
        if (contentTypeHeader != null) {
            int charsetStart = contentTypeHeader.indexOf("charset=");
            if (charsetStart >= 0) {
                return contentTypeHeader.substring(charsetStart + "charset=".length());
            }
        }
        return "UTF-8";
    }
}