98 lines
3.4 KiB
Java
98 lines
3.4 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.latin.network;
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import android.util.Log;
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import java.io.BufferedOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.HttpURLConnection;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* A client for executing HTTP requests synchronously.
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* This must never be called from the main thread.
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*/
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public class BlockingHttpClient {
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private static final boolean DEBUG = false;
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private static final String TAG = BlockingHttpClient.class.getSimpleName();
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private final HttpURLConnection mConnection;
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/**
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* Interface that handles processing the response for a request.
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*/
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public interface ResponseProcessor<T> {
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/**
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* Called when the HTTP request finishes successfully.
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* The {@link InputStream} is closed by the client after the method finishes,
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* so any processing must be done in this method itself.
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*
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* @param response An input stream that can be used to read the HTTP response.
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*/
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T onSuccess(InputStream response) throws IOException;
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}
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public BlockingHttpClient(HttpURLConnection connection) {
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mConnection = connection;
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}
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/**
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* Executes the request on the underlying {@link HttpURLConnection}.
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*
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* @param request The request payload, if any, or null.
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* @param responseProcessor A processor for the HTTP response.
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*/
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public <T> T execute(@Nullable byte[] request, @Nonnull ResponseProcessor<T> responseProcessor)
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throws IOException, AuthException, HttpException {
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if (DEBUG) {
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Log.d(TAG, "execute: " + mConnection.getURL());
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}
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try {
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if (request != null) {
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if (DEBUG) {
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Log.d(TAG, "request size: " + request.length);
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}
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OutputStream out = new BufferedOutputStream(mConnection.getOutputStream());
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out.write(request);
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out.flush();
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out.close();
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}
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final int responseCode = mConnection.getResponseCode();
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if (responseCode != HttpURLConnection.HTTP_OK) {
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Log.w(TAG, "Response error: " + responseCode + ", Message: "
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+ mConnection.getResponseMessage());
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if (responseCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
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throw new AuthException(mConnection.getResponseMessage());
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}
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throw new HttpException(responseCode);
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}
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if (DEBUG) {
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Log.d(TAG, "request executed successfully");
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}
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return responseProcessor.onSuccess(mConnection.getInputStream());
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} finally {
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mConnection.disconnect();
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}
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}
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}
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