android: Add support to POST data via SimpleFetcher

That's required for OCSP verification.

src/frontends/android/app/src/main/java/org/strongswan/android/logic/SimpleFetcher.java

@@ -17,16 +17,18 @@ package org.strongswan.android.logic;
 
 import android.support.annotation.Keep;
 
+import java.io.BufferedOutputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
 
 @Keep
 public class SimpleFetcher
 {
-	public static byte[] fetch(String uri) throws IOException
+	public static byte[] fetch(String uri, byte[] data, String contentType) throws IOException
 	{
 		URL url = new URL(uri);
 		HttpURLConnection conn = (HttpURLConnection)url.openConnection();
@@ -34,6 +36,18 @@ public class SimpleFetcher
 		conn.setReadTimeout(10000);
 		try
 		{
+			if (contentType != null)
+			{
+				conn.setRequestProperty("Content-Type", contentType);
+			}
+			if (data != null)
+			{
+				conn.setDoOutput(true);
+				conn.setFixedLengthStreamingMode(data.length);
+				OutputStream out = new BufferedOutputStream(conn.getOutputStream());
+				out.write(data);
+				out.close();
+			}
 			return streamToArray(conn.getInputStream());
 		}
 		finally
@@ -42,7 +56,7 @@ public class SimpleFetcher
 		}
 	}
 
-	private static byte[] streamToArray(InputStream in)
+	private static byte[] streamToArray(InputStream in) throws IOException
 	{
 		ByteArrayOutputStream out = new ByteArrayOutputStream();
 		byte[] buf = new byte[1024];
@@ -60,6 +74,10 @@ public class SimpleFetcher
 		{
 			e.printStackTrace();
 		}
+		finally
+		{
+			in.close();
+		}
 		return null;
 	}
 }

src/frontends/android/app/src/main/jni/libandroidbridge/backend/android_fetcher.c

@@ -31,6 +31,16 @@ struct android_fetcher_t {
 	 * Callback function
 	 */
 	fetcher_callback_t cb;
+
+	/**
+	 * Data to POST
+	 */
+	chunk_t data;
+
+	/**
+	 * Type of data to POST
+	 */
+	char *request_type;
 };
 
 METHOD(fetcher_t, fetch, status_t,
@@ -38,8 +48,8 @@ METHOD(fetcher_t, fetch, status_t,
 {
 	JNIEnv *env;
 	jmethodID method_id;
-	jobjectArray jdata;
+	jobjectArray jdata = NULL;
-	jstring juri;
+	jstring juri, jct = NULL;
 	chunk_t data;
 	status_t status = FAILED;
 
@@ -51,7 +61,7 @@ METHOD(fetcher_t, fetch, status_t,
 	androidjni_attach_thread(&env);
 	/* can't use FindClass here as this is not called by the main thread */
 	method_id = (*env)->GetStaticMethodID(env, android_simple_fetcher_class,
-										  "fetch", "(Ljava/lang/String;)[B");
+						"fetch", "(Ljava/lang/String;[BLjava/lang/String;)[B");
 	if (!method_id)
 	{
 		goto failed;
@@ -61,8 +71,24 @@ METHOD(fetcher_t, fetch, status_t,
 	{
 		goto failed;
 	}
+	if (this->request_type)
+	{
+		jct = (*env)->NewStringUTF(env, this->request_type);
+		if (!jct)
+		{
+			goto failed;
+		}
+	}
+	if (this->data.ptr)
+	{
+		jdata = byte_array_from_chunk(env, this->data);
+		if (!jdata)
+		{
+			goto failed;
+		}
+	}
 	jdata = (*env)->CallStaticObjectMethod(env, android_simple_fetcher_class,
-										   method_id, juri);
+										   method_id, juri, jdata, jct);
 	if (!jdata || androidjni_exception_occurred(env))
 	{
 		goto failed;
@@ -97,6 +123,16 @@ METHOD(fetcher_t, set_option, bool,
 			this->cb = va_arg(args, fetcher_callback_t);
 			break;
 		}
+		case FETCH_REQUEST_DATA:
+		{
+			this->data = chunk_clone(va_arg(args, chunk_t));
+			break;
+		}
+		case FETCH_REQUEST_TYPE:
+		{
+			this->request_type = strdup(va_arg(args, char*));
+			break;
+		}
 		default:
 			supported = FALSE;
 			break;
@@ -108,6 +144,8 @@ METHOD(fetcher_t, set_option, bool,
 METHOD(fetcher_t, destroy, void,
 	android_fetcher_t *this)
 {
+	chunk_clear(&this->data);
+	free(this->request_type);
 	free(this);
 }