com.viaoa.util.OAHttpClient Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of oa-core Show documentation

Object Automation library

There is a newer version: 3.7.10

package com.viaoa.util;

import java.io.*;
import java.net.*;

// http://rest.elkstein.org/2008/02/using-rest-in-java.html

public class OAHttpClient {

    public static String httpGet(String urlStr) throws IOException {
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        if (conn.getResponseCode() != 200) {
            throw new IOException(conn.getResponseMessage());
        }

        // Buffer the result into a string
        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = rd.readLine()) != null) {
            sb.append(line);
        }
        rd.close();

        conn.disconnect();
        return sb.toString();
    }

    public static String httpPost(String urlStr, String[] paramName, String[] paramVal) throws Exception {
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        conn.setRequestMethod("POST");
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setUseCaches(false);
        conn.setAllowUserInteraction(false);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        // Create the form content
        OutputStream out = conn.getOutputStream();
        Writer writer = new OutputStreamWriter(out, "UTF-8");
        for (int i = 0; i < paramName.length; i++) {
            writer.write(paramName[i]);
            writer.write("=");
            writer.write(URLEncoder.encode(paramVal[i], "UTF-8"));
            writer.write("&");
        }
        writer.close();
        out.close();

        if (conn.getResponseCode() != 200) {
            throw new IOException(conn.getResponseMessage());
        }

        // Buffer the result into a string
        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = rd.readLine()) != null) {
            sb.append(line);
        }
        rd.close();

        conn.disconnect();
        return sb.toString();
    }

}