eu.anynet.java.util.HttpClient.java Source code

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Here is the source code for eu.anynet.java.util.HttpClient.java

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package eu.anynet.java.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.io.Writer;
import org.apache.http.HttpVersion;
import org.apache.http.client.fluent.Content;
import org.apache.http.client.fluent.Form;
import org.apache.http.client.fluent.Request;
import org.apache.http.client.fluent.Response;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

/**
 *
 * @author sim
 */
public class HttpClient {

    private static final int DEFAULT_MAXDOWNLOADINKBYTE = 2048;

    /**
     * Add default properties to the fluent object
     * @param r The request
     * @return The modified request
     */
    private static Request defaults(Request r) {
        return r.userAgent(
                "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36")
                .connectTimeout(5000).socketTimeout(5000).version(HttpVersion.HTTP_1_1);
    }

    /**
     * Create GET request
     * @param url The URL
     * @return The request
     */
    public static Request Get(String url) {
        return defaults(Request.Get(url));
    }

    /**
     * Create POST request
     * @param url The URL
     * @param form Formdata
     * @return The request
     */
    public static Request Post(String url, Form form) {
        return defaults(Request.Post(url)).bodyForm(form.build());
    }

    /**
     * Request to string
     * @param request The request object
     * @param maxbyte Max bytes to fetch
     * @return The response string
     * @throws IOException
     */
    public static String toString(Request request, int maxbyte) throws IOException {
        return toString(request.execute(), maxbyte);
    }

    /**
     * Request to string
     * @param request The request object
     * @return The response string
     * @throws IOException
     */
    public static String toString(Request request) throws IOException {
        return toString(request.execute(), -1);
    }

    /**
     * Response to String
     * @param response -The response object
     * @param maxbyte Max bytes to fetch
     * @return The string
     * @throws IOException
     */
    public static String toString(Response response, int maxbyte) throws IOException {
        Content content = response.returnContent();
        return toString(content.asStream(), maxbyte);
    }

    /**
     * Read from inputstream and get the result as string
     * @param stream The stream
     * @param maxlength Max bytes to fetch, set <1 to disable max length
     * @return The string
     * @throws IOException
     */
    public static String toString(InputStream stream, int maxlength) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
        Writer resultbuffer = new StringWriter();

        char buffer[] = new char[1024];
        int totalReadSize = 0, currentRead = 0, writelength = 0;

        while ((currentRead = reader.read(buffer, 0, buffer.length)) != -1) {
            totalReadSize += currentRead;
            writelength = currentRead;
            if (maxlength > 0 && totalReadSize > maxlength) {
                writelength = maxlength - totalReadSize;
            }

            if (writelength > 0) {
                resultbuffer.write(buffer, 0, writelength);
            } else {
                break;
            }
        }

        reader.close();
        return resultbuffer.toString();
    }

    /**
     * Response to string
     * @param response The response object
     * @return The string
     * @throws IOException
     */
    public static String toString(Response response) throws IOException {
        return toString(response, -1);
    }

    /**
     * Request to JSONObject (max 2048 KB)
     * @param request The request object
     * @return The JSON Object
     * @throws IOException
     */
    public static JSONObject toJsonObject(Request request) throws IOException {
        String text = toString(request, DEFAULT_MAXDOWNLOADINKBYTE * 1024);
        JSONObject json = (JSONObject) JSONValue.parse(text);
        return json;
    }

    /**
     * Request to JSONArray (max 2048 KB)
     * @param request The request object
     * @return The JSON Array
     * @throws IOException
     */
    public static JSONArray toJsonArray(Request request) throws IOException {
        String text = toString(request, DEFAULT_MAXDOWNLOADINKBYTE * 1024);
        JSONArray json = (JSONArray) JSONValue.parse(text);
        return json;
    }

}