[英]Volley behind a proxy server
I am new to Volley Networking Library (of Android). 我是Volley Networking Library(Android版)的新手。 I have observed that the Request function takes URL as the parameter instead of server name and port.
我观察到Request函数将URL作为参数而不是服务器名称和端口。 Is there any way for making Volley request to go through a Proxy Server of my choice if I mention the server name and the port?
如果我提到服务器名称和端口,有没有办法让Volley请求通过我选择的代理服务器?
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
I know that we can make use of server and port info while building the URL but is there a way other than this to make sure that the requests go through a Proxy mentioned by us ? 我知道我们可以在构建URL时使用服务器和端口信息,但除此之外还有其他方法可以确保请求通过我们提到的代理吗?
For example: How do I make HttpURLConnection use a proxy? 例如: 如何使HttpURLConnection使用代理? Here is a method to ensure that HttpURLConnection uses a proxy.
这是一种确保HttpURLConnection使用代理的方法。 I am looking for similar answers for Volley.
我正在为Volley寻找类似的答案。
Volley doesn't offer any direct methods to set proxy but there is a way. Volley没有提供任何直接设置代理的方法,但有一种方法。
Create a custom class extending HurlStack, say ProxiedHurlStack 创建一个扩展HurlStack的自定义类,比如ProxiedHurlStack
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import com.android.volley.toolbox.HurlStack;
public class ProxiedHurlStack extends HurlStack {
@Override
protected HttpURLConnection createConnection(URL url) throws IOException {
// Start the connection by specifying a proxy server
Proxy proxy = new Proxy(Proxy.Type.HTTP,
InetSocketAddress.createUnresolved("192.168.1.11", 8118));//the proxy server(Can be your laptop ip or company proxy)
HttpURLConnection returnThis = (HttpURLConnection) url
.openConnection(proxy);
return returnThis;
}
}
Now initialize your queue using: 现在使用以下命令初始化队列:
mRequestQueue = Volley.newRequestQueue(context, new ProxiedHurlStack());
Courtesy: http://d.hatena.ne.jp/esmasui/20130613/1371126800 礼貌: http : //d.hatena.ne.jp/esmasui/20130613/1371126800
If users set up a proxy at the system level (eg proxy host for a wifi connection), then you won't explicitly know that inside your app. 如果用户在系统级别设置代理(例如,用于wifi连接的代理主机),那么您将不会在应用程序内明确知道。 To get around this, I also extended HurlStack to use the first provisioned proxy:
为了解决这个问题,我还扩展了HurlStack以使用第一个配置的代理:
public class ProxyHurlStack extends HurlStack {
@Override
protected HttpURLConnection createConnection(URL url) throws IOException {
final HttpURLConnection urlConnection;
Proxy proxy = null;
try {
proxy = ProxySelector.getDefault().select(url.toURI()).get(0);
} catch (Exception e) {
Ln.e(e, e.getMessage());
}
if (proxy == null) {
urlConnection = (HttpURLConnection) url.openConnection();
} else {
urlConnection = (HttpURLConnection) url.openConnection(proxy);
}
return urlConnection;
}
}
Justin Lee has the best Answer for that question. Justin Lee对这个问题有最好的答案。 Firstly I was afraid about ProxySelector returning more than one Proxy definition, but, actually, it returns only one, even though the return type is a List.
首先,我担心ProxySelector返回多个Proxy定义,但实际上,它只返回一个,即使返回类型是List。
@Override public List<Proxy> select(URI uri) {
return Collections.singletonList(selectOneProxy(uri));
}
private Proxy selectOneProxy(URI uri) {[...]
Secondly I think that using the user system wild set up would be a good practice. 其次我认为使用用户系统进行疯狂设置将是一个很好的做法。 For the sake of usability and dynamic proxy configuration.
为了可用性和动态代理配置。 See here for more information about the
select(java.net.URI)
method. 有关
select(java.net.URI)
方法的更多信息,请参见此处 。
Oh, by the way, if I was you, I would see HurlStack implementation of the createConnection(java.net.Url)
first. 哦,顺便说一句,如果我是你,我会首先看到
createConnection(java.net.Url)
HurlStack实现。 Here it is: 这里是:
/**
* Create an {@link HttpURLConnection} for the specified {@code url}.
*/
protected HttpURLConnection createConnection(URL url) throws IOException {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
// Workaround for the M release HttpURLConnection not observing the
// HttpURLConnection.setFollowRedirects() property.
// https://code.google.com/p/android/issues/detail?id=194495
connection.setInstanceFollowRedirects(HttpURLConnection.getFollowRedirects());
return connection;
}
Look those comments... 看那些评论......
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