Add proxy configuration in HttpURLConnectionClient

README.md

@@ -30,7 +30,22 @@ Add this dependency to your project's POM:
 ## Usage
 
 The code examples on using this library are located in the library section of the java-sample-code repository: https://github.com/adyen/adyen-java-sample-code
-
+
+## Proxy configuration
+
+You can configure a proxy connection by injecting your own HttpURLConnectionClient on your client instance.
+
+Example:
+```
+...
+HttpURLConnectionClient httpURLConnectionClientWithProxy = new HttpURLConnectionClient();
+
+Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("PROXY_HOST", PROXY_PORT));
+httpURLConnectionClientWithProxy.setProxy(proxy);
+
+client.setHttpClient(httpURLConnectionClientWithProxy);
+```
+
 ## Support
 
 If you have any problems, questions or suggestions, create an issue here or send your inquiry to support@adyen.com.

src/main/java/com/adyen/httpclient/HttpURLConnectionClient.java

@@ -25,6 +25,7 @@
 import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.HttpURLConnection;
+import java.net.Proxy;
 import java.net.URL;
 import java.net.URLEncoder;
 import java.util.Map;
@@ -35,6 +36,7 @@
 
 public class HttpURLConnectionClient implements ClientInterface {
     private static final String CHARSET = "UTF-8";
+    private Proxy proxy;
 
     /**
      * Does a POST request.
@@ -99,9 +101,14 @@ private String getQuery(Map<String, String> params) throws UnsupportedEncodingEx
      */
     private HttpURLConnection createRequest(String requestUrl, String applicationName) throws IOException {
         URL targetUrl = new URL(requestUrl);
+        HttpURLConnection httpConnection;
 
-        // set configurations
-        HttpURLConnection httpConnection = (HttpURLConnection) targetUrl.openConnection();
+        // Set proxy if configured
+        if (proxy != null) {
+            httpConnection = (HttpURLConnection) targetUrl.openConnection(proxy);
+        } else {
+            httpConnection = (HttpURLConnection) targetUrl.openConnection();
+        }
         httpConnection.setUseCaches(false);
         httpConnection.setDoOutput(true);
         httpConnection.setRequestMethod("POST");
@@ -163,4 +170,12 @@ private String doPostRequest(HttpURLConnection httpConnection, String requestBod
 
         return response;
     }
+
+    public Proxy getProxy() {
+        return proxy;
+    }
+
+    public void setProxy(Proxy proxy) {
+        this.proxy = proxy;
+    }
 }