Main.java Source code

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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.NameValuePair;

import org.apache.http.protocol.HTTP;

import java.nio.ByteBuffer;

import java.nio.charset.Charset;
import java.util.*;

public class Main {
    private static final String PARAMETER_SEPARATOR = "&";
    private static final String NAME_VALUE_SEPARATOR = "=";
    /**
     * Safe characters for x-www-form-urlencoded data, as per java.net.URLEncoder and browser behaviour,
     * i.e. alphanumeric plus {@code "-", "_", ".", "*"}
     */
    private static final BitSet URLENCODER = new BitSet(256);
    private static final int RADIX = 16;

    /**
     * Returns a String that is suitable for use as an <code>application/x-www-form-urlencoded</code>
     * list of parameters in an HTTP PUT or HTTP POST.
     *
     * @param parameters The parameters to include.
     * @param charset    The encoding to use.
     */
    public static String format(final List<? extends NameValuePair> parameters, final String charset) {
        final StringBuilder result = new StringBuilder();
        for (final NameValuePair parameter : parameters) {
            final String encodedName = encodeFormFields(parameter.getName(), charset);
            final String encodedValue = encodeFormFields(parameter.getValue(), charset);
            if (result.length() > 0) {
                result.append(PARAMETER_SEPARATOR);
            }
            result.append(encodedName);
            if (encodedValue != null) {
                result.append(NAME_VALUE_SEPARATOR);
                result.append(encodedValue);
            }
        }
        return result.toString();
    }

    /**
     * Returns a String that is suitable for use as an <code>application/x-www-form-urlencoded</code>
     * list of parameters in an HTTP PUT or HTTP POST.
     *
     * @param parameters The parameters to include.
     * @param charset    The encoding to use.
     * @since 4.2
     */
    public static String format(final Iterable<? extends NameValuePair> parameters, final Charset charset) {
        final StringBuilder result = new StringBuilder();
        for (final NameValuePair parameter : parameters) {
            final String encodedName = encodeFormFields(parameter.getName(), charset);
            final String encodedValue = encodeFormFields(parameter.getValue(), charset);
            if (result.length() > 0) {
                result.append(PARAMETER_SEPARATOR);
            }
            result.append(encodedName);
            if (encodedValue != null) {
                result.append(NAME_VALUE_SEPARATOR);
                result.append(encodedValue);
            }
        }
        return result.toString();
    }

    /**
     * Encode/escape www-url-form-encoded content.
     * <p/>
     * Uses the {@link #URLENCODER} set of characters, rather than
     * the set; this is for compatibilty with previous
     * releases, URLEncoder.encode() and most browsers.
     *
     * @param content the content to encode, will convert space to '+'
     * @param charset the charset to use
     * @return encoded string
     */
    private static String encodeFormFields(final String content, final String charset) {
        if (content == null) {
            return null;
        }
        return urlencode(content, charset != null ? Charset.forName(charset) : Charset.forName(HTTP.UTF_8),
                URLENCODER, true);
    }

    /**
     * Encode/escape www-url-form-encoded content.
     * <p/>
     * Uses the {@link #URLENCODER} set of characters, rather than
     * the set; this is for compatibilty with previous
     * releases, URLEncoder.encode() and most browsers.
     *
     * @param content the content to encode, will convert space to '+'
     * @param charset the charset to use
     * @return encoded string
     */
    private static String encodeFormFields(final String content, final Charset charset) {
        if (content == null) {
            return null;
        }
        return urlencode(content, charset != null ? charset : Charset.forName(HTTP.UTF_8), URLENCODER, true);
    }

    private static String urlencode(final String content, final Charset charset, final BitSet safechars,
            final boolean blankAsPlus) {
        if (content == null) {
            return null;
        }
        StringBuilder buf = new StringBuilder();
        ByteBuffer bb = charset.encode(content);
        while (bb.hasRemaining()) {
            int b = bb.get() & 0xff;
            if (safechars.get(b)) {
                buf.append((char) b);
            } else if (blankAsPlus && b == ' ') {
                buf.append('+');
            } else {
                buf.append("%");
                char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, RADIX));
                char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, RADIX));
                buf.append(hex1);
                buf.append(hex2);
            }
        }
        return buf.toString();
    }
}