PRDownloader Custom HTTP Client

發表於 更新於 分類於

In this article, I will show you how to customize a HttpClient for PrDownloader

Create a new class called EvilHostnameVerifier

1
2
3
4
5
6
7
8
9
import javax.net.ssl.HostnameVerifier
import javax.net.ssl.SSLSession

class EvilHostnameVerifier: HostnameVerifier {

    override fun verify(hostname: String?, sslString: SSLSession?): Boolean {
        return hostname == "example.com"
    }
}

Copy DefaultHttpClient from PRDownloader library, I name it the EvilHttpClient!

1
2
3
URLConnection
  ⎿ HttpURLConnection
    ⎿ HttpsURLConnection
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
public class EvilHttpClient implements HttpClient {

    // The original one:
    private URLConnection connection;
    
    // Change to this:
    private HttpsURLConnection connection;

    // Other implementations...
    
    @Override
    public void connect(DownloadRequest request) throws IOException {
        connection = (HttpsURLConnection) new URL(request.getUrl()).openConnection();
        connection.setReadTimeout(request.getReadTimeout());
        connection.setConnectTimeout(request.getConnectTimeout());
        final String range = String.format(Locale.ENGLISH,
                "bytes=%d-", request.getDownloadedBytes());
        connection.addRequestProperty(Constants.RANGE, range);
        connection.addRequestProperty(Constants.USER_AGENT, request.getUserAgent());
        addHeaders(request);
        
        // Add hostname verifier before connect
        connection.setHostnameVerifier(new EvilHostnameVerifier());
        
        connection.connect();
    }
    
    // Other implementations...

}

Then add the custom HttpClient when initialize PRDownloader.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
class MyApplication : Application() {

    // ...
    
    private fun setupPrDownloadManger() {
        val config = PRDownloaderConfig.newBuilder()
            .setHttpClient(EvilHttpClient())
            .setDatabaseEnabled(true)
            .setReadTimeout(30000)
            .setConnectTimeout(30000)
            .build()
        PRDownloader.initialize(applicationContext, config)
    }
}

There you go, no more “Hostname example.com was not verified”