com.spotify.apollo.http.client.HttpClient.java Source code

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Here is the source code for com.spotify.apollo.http.client.HttpClient.java

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/*
 * -\-\-
 * Spotify Apollo okhttp Client Module
 * --
 * Copyright (C) 2013 - 2015 Spotify AB
 * --
 * 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.spotify.apollo.http.client;

import com.spotify.apollo.environment.IncomingRequestAwareClient;

import com.squareup.okhttp.Headers;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;

import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.TimeUnit;

import javax.inject.Inject;

import okio.ByteString;

class HttpClient implements IncomingRequestAwareClient {

    private static final MediaType DEFAULT_CONTENT_TYPE = MediaType.parse("application/octet-stream");
    private static final String AUTHORIZATION_HEADER = "Authorization";

    private final OkHttpClient client;

    @Inject
    HttpClient(OkHttpClient client) {
        this.client = client;
    }

    @Deprecated
    /** @deprecated use {@link #createUnconfigured()} instead. */
    public static HttpClient create() {
        return createUnconfigured();
    }

    /**
     * @return a HttpClient with the default configuration settings.
     */
    public static HttpClient createUnconfigured() {
        return new HttpClient(new OkHttpClient());
    }

    @Override
    public CompletionStage<com.spotify.apollo.Response<ByteString>> send(com.spotify.apollo.Request apolloRequest,
            Optional<com.spotify.apollo.Request> apolloIncomingRequest) {

        final Optional<RequestBody> requestBody = apolloRequest.payload().map(payload -> {
            final MediaType contentType = apolloRequest.header("Content-Type").map(MediaType::parse)
                    .orElse(DEFAULT_CONTENT_TYPE);
            return RequestBody.create(contentType, payload);
        });

        Headers.Builder headersBuilder = new Headers.Builder();
        apolloRequest.headers().asMap().forEach((k, v) -> headersBuilder.add(k, v));

        apolloIncomingRequest.flatMap(req -> req.header(AUTHORIZATION_HEADER))
                .ifPresent(header -> headersBuilder.add(AUTHORIZATION_HEADER, header));

        final Request request = new Request.Builder().method(apolloRequest.method(), requestBody.orElse(null))
                .url(apolloRequest.uri()).headers(headersBuilder.build()).build();

        final CompletableFuture<com.spotify.apollo.Response<ByteString>> result = new CompletableFuture<>();

        //https://github.com/square/okhttp/wiki/Recipes#per-call-configuration
        OkHttpClient finalClient = client;
        if (apolloRequest.ttl().isPresent() && client.getReadTimeout() != apolloRequest.ttl().get().toMillis()) {
            finalClient = client.clone();
            finalClient.setReadTimeout(apolloRequest.ttl().get().toMillis(), TimeUnit.MILLISECONDS);
        }

        finalClient.newCall(request).enqueue(TransformingCallback.create(result));

        return result;
    }
}