100 lines
3.3 KiB
Java
100 lines
3.3 KiB
Java
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/*
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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 com.android.inputmethod.annotations.UsedForTesting;
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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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* TODO: Remove @UsedForTesting after this is actually used.
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*/
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@UsedForTesting
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public class BlockingHttpClient {
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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 {
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/**
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* Called when the HTTP request fails with an error.
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*
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* @param httpStatusCode The status code of the HTTP response.
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* @param message The HTTP response message, if any, or null.
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*/
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void onError(int httpStatusCode, @Nullable String message);
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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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void onSuccess(InputStream response);
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}
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/**
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* TODO: Remove @UsedForTesting after this is actually used.
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*/
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@UsedForTesting
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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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* TODO: Remove @UsedForTesting after this is actually used.
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*
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* @param request The request payload, if any, or null.
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* @param responeProcessor A processor for the HTTP response.
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*/
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@UsedForTesting
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public void execute(@Nullable byte[] request, @Nonnull ResponseProcessor responseProcessor)
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throws IOException {
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try {
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if (request != null) {
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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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responseProcessor.onError(responseCode, mConnection.getResponseMessage());
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} else {
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responseProcessor.onSuccess(mConnection.getInputStream());
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}
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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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