Java HTTP Request doHttpRequest(String action, URL url, String body, String... args)

Description

_more_

License

Apache License

Parameter

Parameter	Description
action	_more_
url	_more_
body	_more_
args	_more_

Exception

Parameter	Description
Exception	_more_

Return

_more_

Declaration

public static String doHttpRequest(String action, URL url, String body, String... args) throws Exception 

Method Source Code

//package com.java2s;
/*/*from   w  w w .  j a v a  2s.co m*/
* Copyright (c) 2008-2018 Geode Systems LLC
*
* 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.*;
import java.io.*;

import java.net.*;

public class Main {
    /**
     * _more_
     *
     * @param action _more_
     * @param url _more_
     * @param body _more_
     * @param args _more_
     *
     * @return _more_
     *
     * @throws Exception _more_
     */
    public static String doHttpRequest(String action, URL url, String body, String... args) throws Exception {
        //        URL url = new URL(request); 
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.setInstanceFollowRedirects(false);
        connection.setRequestMethod(action);
        connection.setRequestProperty("charset", "utf-8");
        for (int i = 0; i < args.length; i += 2) {
            //            System.err.println(args[i]+":" + args[i+1]);
            connection.setRequestProperty(args[i], args[i + 1]);
        }
        if (body != null) {
            connection.setRequestProperty("Content-Length", Integer.toString(body.length()));

            connection.getOutputStream().write(body.getBytes());
        }
        try {
            return readString(new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8")));
        } catch (Exception exc) {
            System.err.println("Utils: error doing http request:" + action + "\nURL:" + url + "\nreturn code:"
                    + connection.getResponseCode() + "\nBody:" + body);
            System.err.println(readError(connection));
            System.err.println(connection.getHeaderFields());

            throw exc;
            //            System.err.println(connection.getContent());
        }
    }

    /**
     * _more_
     *
     * @param o _more_
     *
     * @return _more_
     */
    public static String toString(Object o) {
        if (o == null) {
            return "";
        }

        return o.toString();
    }

    /**
     * _more_
     *
     * @param input _more_
     *
     * @return _more_
     *
     * @throws Exception _more_
     */
    public static String readString(BufferedReader input) throws Exception {
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = input.readLine()) != null) {
            sb.append(line);
            sb.append("\n");
        }

        return sb.toString();
    }

    /**
     * _more_
     *
     * @param conn _more_
     *
     * @return _more_
     */
    public static String readError(HttpURLConnection conn) {
        try {
            return readString(new BufferedReader(new InputStreamReader(conn.getErrorStream(), "UTF-8")));

        } catch (Exception exc) {
            return "No error message";
        }
    }

    /**
     * _more_
     *
     * @param sb _more_
     * @param s _more_
     *
     * @return _more_
     */
    public static Appendable append(Appendable sb, String s) {
        try {
            sb.append(s);

            return sb;
        } catch (java.io.IOException ioe) {
            throw new RuntimeException(ioe);
        }
    }
}

Related

1. addRequestProperties(final Map requestProperties, final HttpURLConnection connection)
2. getContent(String requestUrl)
3. getDataFromRequestViaPost(String request, String urlParameters)
4. getOutputFromUrlConnection(String stringUrl, String requestProperty)
5. getRequest(String urlString)