Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
 *
 * 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 org.apache.http.protocol.HTTP;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;

public class Main {
    /**
     * Decode/unescape www-url-form-encoded content.
     *
     * @param content the content to decode, will decode '+' as space
     * @param charset the charset to use
     * @return encoded string
     */
    private static String decodeFormFields(final String content, final String charset) {
        if (content == null) {
            return null;
        }
        return urldecode(content, charset != null ? Charset.forName(charset) : Charset.forName(HTTP.UTF_8), true);
    }

    /**
     * Decode/unescape www-url-form-encoded content.
     *
     * @param content the content to decode, will decode '+' as space
     * @param charset the charset to use
     * @return encoded string
     */
    private static String decodeFormFields(final String content, final Charset charset) {
        if (content == null) {
            return null;
        }
        return urldecode(content, charset != null ? charset : Charset.forName(HTTP.UTF_8), true);
    }

    /**
     * Decode/unescape a portion of a URL, to use with the query part ensure {@code plusAsBlank} is true.
     *
     * @param content     the portion to decode
     * @param charset     the charset to use
     * @param plusAsBlank if {@code true}, then convert '+' to space (e.g. for www-url-form-encoded content), otherwise leave as is.
     * @return encoded string
     */
    private static String urldecode(final String content, final Charset charset, final boolean plusAsBlank) {
        if (content == null) {
            return null;
        }
        ByteBuffer bb = ByteBuffer.allocate(content.length());
        CharBuffer cb = CharBuffer.wrap(content);
        while (cb.hasRemaining()) {
            char c = cb.get();
            if (c == '%' && cb.remaining() >= 2) {
                char uc = cb.get();
                char lc = cb.get();
                int u = Character.digit(uc, 16);
                int l = Character.digit(lc, 16);
                if (u != -1 && l != -1) {
                    bb.put((byte) ((u << 4) + l));
                } else {
                    bb.put((byte) '%');
                    bb.put((byte) uc);
                    bb.put((byte) lc);
                }
            } else if (plusAsBlank && c == '+') {
                bb.put((byte) ' ');
            } else {
                bb.put((byte) c);
            }
        }
        bb.flip();
        return charset.decode(bb).toString();
    }
}