HttpClient.java
/*
* The contents of this file are subject to the OpenMRS Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://license.openmrs.org
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* Copyright (C) OpenMRS, LLC. All Rights Reserved.
*/
package org.openmrs.util;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URLEncoder;
import java.util.Map;
/**
* This class supports doing an HTTP post to a URL. (It replaces the OpenmrsUtil.postToUrl method, allowing us to
* mock http calls in unit tests.)
*/
public class HttpClient {
private static Log log = LogFactory.getLog(HttpClient.class);
private HttpUrl url;
public HttpClient(String url) throws MalformedURLException {
this(new HttpUrl(url));
}
public HttpClient(HttpUrl url) {
this.url = url;
}
public String post(Map<String, String> parameters) {
OutputStreamWriter wr = null;
BufferedReader rd = null;
String response = "";
StringBuffer data = new StringBuffer();
try {
// Construct data
for (Map.Entry<String, String> entry : parameters.entrySet()) {
// skip over invalid post variables
if (entry.getKey() == null || entry.getValue() == null)
continue;
data.append("&"); // only append this if its _not_ the first
// datum
// finally, setup the actual post string
data.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
data.append("=");
data.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
}
// Send the data
HttpURLConnection connection = url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Length", String.valueOf(data.length()));
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
wr = new OutputStreamWriter(connection.getOutputStream());
wr.write(data.toString());
wr.flush();
wr.close();
// Get the response
rd = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
response = String.format("%s%s\n", response, line);
}
}
catch (Exception e) {
log.warn("Exception while posting to : " + this.url, e);
log.warn("Reponse from server was: " + response);
}
finally {
if (wr != null)
try {
wr.close();
}
catch (Exception e) { /* pass */
}
if (rd != null)
try {
rd.close();
}
catch (Exception e) { /* pass */
}
}
return response;
}
}