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OkHttpClient.java
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156 lines (135 loc) · 4.85 KB
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/*
* Copyright 2015 Netflix, Inc.
*
* 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 feign.okhttp;
import com.squareup.okhttp.Headers;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import feign.Client;
/**
* This module directs Feign's http requests to <a href="http://square.github.io/okhttp/">OkHttp</a>,
* which enables SPDY and better network control. Ex.
* <pre>
* GitHub github = Feign.builder().client(new OkHttpClient()).target(GitHub.class,
* "https://api.github.com");
*/
public final class OkHttpClient implements Client {
private final com.squareup.okhttp.OkHttpClient delegate;
public OkHttpClient() {
this(new com.squareup.okhttp.OkHttpClient());
}
public OkHttpClient(com.squareup.okhttp.OkHttpClient delegate) {
this.delegate = delegate;
}
static Request toOkHttpRequest(feign.Request input) {
Request.Builder requestBuilder = new Request.Builder();
requestBuilder.url(input.url());
MediaType mediaType = null;
boolean hasAcceptHeader = false;
for (String field : input.headers().keySet()) {
if (field.equalsIgnoreCase("Accept")) {
hasAcceptHeader = true;
}
for (String value : input.headers().get(field)) {
if (field.equalsIgnoreCase("Content-Type")) {
mediaType = MediaType.parse(value);
if (input.charset() != null) {
mediaType.charset(input.charset());
}
} else {
requestBuilder.addHeader(field, value);
}
}
}
// Some servers choke on the default accept string.
if (!hasAcceptHeader) {
requestBuilder.addHeader("Accept", "*/*");
}
RequestBody body = input.body() != null ? RequestBody.create(mediaType, input.body()) : null;
requestBuilder.method(input.method(), body);
return requestBuilder.build();
}
private static feign.Response toFeignResponse(Response input) {
return feign.Response
.create(input.code(), input.message(), toMap(input.headers()), toBody(input.body()));
}
private static Map<String, Collection<String>> toMap(Headers headers) {
Map<String, Collection<String>>
result =
new LinkedHashMap<String, Collection<String>>(headers.size());
for (String name : headers.names()) {
// TODO: this is very inefficient as headers.values iterate case insensitively.
result.put(name, headers.values(name));
}
return result;
}
private static feign.Response.Body toBody(final ResponseBody input) {
if (input == null || input.contentLength() == 0) {
return null;
}
if (input.contentLength() > Integer.MAX_VALUE) {
throw new UnsupportedOperationException("Length too long " + input.contentLength());
}
final Integer length = input.contentLength() != -1 ? (int) input.contentLength() : null;
return new feign.Response.Body() {
@Override
public void close() throws IOException {
input.close();
}
@Override
public Integer length() {
return length;
}
@Override
public boolean isRepeatable() {
return false;
}
@Override
public InputStream asInputStream() throws IOException {
return input.byteStream();
}
@Override
public Reader asReader() throws IOException {
return input.charStream();
}
};
}
@Override
public feign.Response execute(feign.Request input, feign.Request.Options options)
throws IOException {
com.squareup.okhttp.OkHttpClient requestScoped;
if (delegate.getConnectTimeout() != options.connectTimeoutMillis()
|| delegate.getReadTimeout() != options.readTimeoutMillis()) {
requestScoped = delegate.clone();
requestScoped.setConnectTimeout(options.connectTimeoutMillis(), TimeUnit.MILLISECONDS);
requestScoped.setReadTimeout(options.readTimeoutMillis(), TimeUnit.MILLISECONDS);
} else {
requestScoped = delegate;
}
Request request = toOkHttpRequest(input);
Response response = requestScoped.newCall(request).execute();
return toFeignResponse(response);
}
}