volley+okhttp

package com.github.obsessive.library.utils;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.toolbox.HttpStack;
import com.squareup.okhttp.Call;
import com.squareup.okhttp.Headers;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Protocol;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.ProtocolVersion;
import org.apache.http.StatusLine;
import org.apache.http.entity.BasicHttpEntity;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicHttpResponse;
import org.apache.http.message.BasicStatusLine;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
* Author:  Tau.Chen
* Email:   1076559197@qq.com | tchen0707@gmail.com
* Date:    15/8/17 10:01
* Description:
*/
public class OkHttpStack implements HttpStack {
private final OkHttpClient mClient;

public OkHttpStack(OkHttpClient client) {
this.mClient = client;
}

@Override
public HttpResponse performRequest(Request<?> request, Map<String, String> additionalHeaders)
throws IOException, AuthFailureError {

OkHttpClient client = mClient.clone();
int timeoutMs = request.getTimeoutMs();
client.setConnectTimeout(timeoutMs, TimeUnit.MILLISECONDS);
client.setReadTimeout(timeoutMs, TimeUnit.MILLISECONDS);
client.setWriteTimeout(timeoutMs, TimeUnit.MILLISECONDS);

com.squareup.okhttp.Request.Builder okHttpRequestBuilder = new com.squareup.okhttp.Request.Builder();
okHttpRequestBuilder.url(request.getUrl());

Map<String, String> headers = request.getHeaders();
for (final String name : headers.keySet()) {
okHttpRequestBuilder.addHeader(name, headers.get(name));
}
for (final String name : additionalHeaders.keySet()) {
okHttpRequestBuilder.addHeader(name, additionalHeaders.get(name));
}

setConnectionParametersForRequest(okHttpRequestBuilder, request);

com.squareup.okhttp.Request okHttpRequest = okHttpRequestBuilder.build();
Call okHttpCall = client.newCall(okHttpRequest);
Response okHttpResponse = okHttpCall.execute();

StatusLine responseStatus = new BasicStatusLine(parseProtocol(okHttpResponse.protocol()), okHttpResponse.code(), okHttpResponse.message());
BasicHttpResponse response = new BasicHttpResponse(responseStatus);
response.setEntity(entityFromOkHttpResponse(okHttpResponse));

Headers responseHeaders = okHttpResponse.headers();
for (int i = 0, len = responseHeaders.size(); i < len; i++) {
final String name = responseHeaders.name(i), value = responseHeaders.value(i);
if (name != null) {
response.addHeader(new BasicHeader(name, value));
}
}

return response;
}

private static HttpEntity entityFromOkHttpResponse(Response r) throws IOException {
BasicHttpEntity entity = new BasicHttpEntity();
ResponseBody body = r.body();

entity.setContent(body.byteStream());
entity.setContentLength(body.contentLength());
entity.setContentEncoding(r.header("Content-Encoding"));

if (body.contentType() != null) {
entity.setContentType(body.contentType().type());
}
return entity;
}

@SuppressWarnings("deprecation")
private static void setConnectionParametersForRequest(com.squareup.okhttp.Request.Builder builder, Request<?> request)
throws IOException, AuthFailureError {
switch (request.getMethod()) {
case Request.Method.DEPRECATED_GET_OR_POST:
// Ensure backwards compatibility.  Volley assumes a request with a null body is a GET.
byte[] postBody = request.getPostBody();
if (postBody != null) {
builder.post(RequestBody.create(MediaType.parse(request.getPostBodyContentType()), postBody));
}
break;
case Request.Method.GET:
builder.get();
break;
case Request.Method.DELETE:
builder.delete();
break;
case Request.Method.POST:
builder.post(createRequestBody(request));
break;
case Request.Method.PUT:
builder.put(createRequestBody(request));
break;
case Request.Method.HEAD:
builder.head();
break;
case Request.Method.OPTIONS:
builder.method("OPTIONS", null);
break;
case Request.Method.TRACE:
builder.method("TRACE", null);
break;
case Request.Method.PATCH:
builder.patch(createRequestBody(request));
break;
default:
throw new IllegalStateException("Unknown method type.");
}
}

private static ProtocolVersion parseProtocol(final Protocol p) {
switch (p) {
case HTTP_1_0:
return new ProtocolVersion("HTTP", 1, 0);
case HTTP_1_1:
return new ProtocolVersion("HTTP", 1, 1);
case SPDY_3:
return new ProtocolVersion("SPDY", 3, 1);
case HTTP_2:
return new ProtocolVersion("HTTP", 2, 0);
}

throw new IllegalAccessError("Unkwown protocol");
}

private static RequestBody createRequestBody(Request r) throws AuthFailureError {
final byte[] body = r.getBody();
if (body == null) return null;

return RequestBody.create(MediaType.parse(r.getBodyContentType()), body);
}
}