Add authentication/http request related code to LatinIme

Bug: 17464068
Bug: 17464805
Change-Id: I533ae8821e0628fdf6591538a96ab50f805c0cdf

1 files changed, 99 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/network/BlockingHttpClient.java b/java/src/com/android/inputmethod/latin/network/BlockingHttpClient.java
new file mode 100644
index 000000000..0d0cbe169
--- /dev/null
+++ b/java/src/com/android/inputmethod/latin/network/BlockingHttpClient.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.latin.network;
+
+import com.android.inputmethod.annotations.UsedForTesting;
+
+import java.io.BufferedOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * A client for executing HTTP requests synchronously.
+ * This must never be called from the main thread.
+ *
+ * TODO: Remove @UsedForTesting after this is actually used.
+ */
+@UsedForTesting
+public class BlockingHttpClient {
+    private final HttpURLConnection mConnection;
+
+    /**
+     * Interface that handles processing the response for a request.
+     */
+    public interface ResponseProcessor {
+        /**
+         * Called when the HTTP request fails with an error.
+         *
+         * @param httpStatusCode The status code of the HTTP response.
+         * @param message The HTTP response message, if any, or null.
+         */
+        void onError(int httpStatusCode, @Nullable String message);
+
+        /**
+         * Called when the HTTP request finishes successfully.
+         * The {@link InputStream} is closed by the client after the method finishes,
+         * so any processing must be done in this method itself.
+         *
+         * @param response An input stream that can be used to read the HTTP response.
+         */
+        void onSuccess(InputStream response);
+    }
+
+    /**
+     * TODO: Remove @UsedForTesting after this is actually used.
+     */
+    @UsedForTesting
+    public BlockingHttpClient(HttpURLConnection connection) {
+        mConnection = connection;
+    }
+
+    /**
+     * Executes the request on the underlying {@link HttpURLConnection}.
+     *
+     * TODO: Remove @UsedForTesting after this is actually used.
+     *
+     * @param request The request payload, if any, or null.
+     * @param responeProcessor A processor for the HTTP response.
+     */
+    @UsedForTesting
+    public void execute(@Nullable byte[] request, @Nonnull ResponseProcessor responseProcessor)
+            throws IOException {
+        try {
+            if (request != null) {
+                OutputStream out = new BufferedOutputStream(mConnection.getOutputStream());
+                out.write(request);
+                out.flush();
+                out.close();
+            }
+
+            final int responseCode = mConnection.getResponseCode();
+            if (responseCode != HttpURLConnection.HTTP_OK) {
+                responseProcessor.onError(responseCode, mConnection.getResponseMessage());
+            } else {
+                responseProcessor.onSuccess(mConnection.getInputStream());
+            }
+        } finally {
+            mConnection.disconnect();
+        }
+    }
+}