Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2009-2011 Dropbox, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class Main {
    /**
     * Creates a URL for a request to the Dropbox API.
     *
     * @param host the Dropbox host (i.e., api server, content server, or web
     *         server).
     * @param apiVersion the API version to use. You should almost always use
     *         {@code DropboxAPI.VERSION} for this.
     * @param target the target path, staring with a '/'.
     * @param params any URL params in an array, with the even numbered
     *         elements the parameter names and odd numbered elements the
     *         values, e.g. <code>new String[] {"path", "/Public", "locale",
     *         "en"}</code>.
     *
     * @return a full URL for making a request.
     */
    public static String buildURL(String host, int apiVersion, String target, String[] params) {
        if (!target.startsWith("/")) {
            target = "/" + target;
        }

        try {
            // We have to encode the whole line, then remove + and / encoding
            // to get a good OAuth URL.
            target = URLEncoder.encode("/" + apiVersion + target, "UTF-8");
            target = target.replace("%2F", "/");

            if (params != null && params.length > 0) {
                target += "?" + urlencode(params);
            }

            // These substitutions must be made to keep OAuth happy.
            target = target.replace("+", "%20").replace("*", "%2A");
        } catch (UnsupportedEncodingException uce) {
            return null;
        }

        return "https://" + host + ":443" + target;
    }

    /**
     * URL encodes an array of parameters into a query string.
     */
    private static String urlencode(String[] params) {
        if (params.length % 2 != 0) {
            throw new IllegalArgumentException("Params must have an even number of elements.");
        }

        String result = "";
        try {
            boolean firstTime = true;
            for (int i = 0; i < params.length; i += 2) {
                if (params[i + 1] != null) {
                    if (firstTime) {
                        firstTime = false;
                    } else {
                        result += "&";
                    }
                    result += URLEncoder.encode(params[i], "UTF-8") + "="
                            + URLEncoder.encode(params[i + 1], "UTF-8");
                }
            }
            result.replace("*", "%2A");
        } catch (UnsupportedEncodingException e) {
            return null;
        }
        return result;
    }
}