含羞草 v2.1.6版本的 MD5 值为:6eb49dcd42f2b660ff6f51c70f543d8b
以下内容为反编译后的 Pinger.java 源代码,内容仅作参考
package com.danikula.videocache;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public class Pinger {
private static final String PING_REQUEST = "ping";
private static final String PING_RESPONSE = "ping ok";
private final String host;
private final ExecutorService pingExecutor = Executors.newSingleThreadExecutor();
private final int port;
Pinger(String str, int i) {
this.host = (String) Preconditions.checkNotNull(str);
this.port = i;
}
boolean ping(int i, int i2) {
Preconditions.checkArgument(i >= 1);
Preconditions.checkArgument(i2 > 0);
int i3 = 0;
while (i3 < i) {
try {
} catch (InterruptedException | ExecutionException unused) {
Logger.error("Error pinging server due to unexpected error");
} catch (TimeoutException unused2) {
Logger.warn("Error pinging server (attempt: " + i3 + ", timeout: " + i2 + "). ");
}
if (((Boolean) this.pingExecutor.submit(new PingCallable()).get(i2, TimeUnit.MILLISECONDS)).booleanValue()) {
return true;
}
i3++;
i2 *= 2;
}
Logger.error(String.format(Locale.US, "Error pinging server (attempts: %d, max timeout: %d). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: %s", Integer.valueOf(i3), Integer.valueOf(i2 / 2), getDefaultProxies()));
return false;
}
private List<Proxy> getDefaultProxies() {
try {
return ProxySelector.getDefault().select(new URI(getPingUrl()));
} catch (URISyntaxException e) {
throw new IllegalStateException(e);
}
}
boolean isPingRequest(String str) {
return PING_REQUEST.equals(str);
}
void responseToPing(Socket socket) throws IOException {
OutputStream outputStream = socket.getOutputStream();
outputStream.write("HTTP/1.1 200 OK\n\n".getBytes());
outputStream.write(PING_RESPONSE.getBytes());
}
public boolean pingServer() throws ProxyCacheException {
HttpUrlSource httpUrlSource = new HttpUrlSource(getPingUrl());
try {
byte[] bytes = PING_RESPONSE.getBytes();
httpUrlSource.open(0L);
byte[] bArr = new byte[bytes.length];
httpUrlSource.read(bArr);
boolean equals = Arrays.equals(bytes, bArr);
Logger.info("Ping response: `" + new String(bArr) + "`, pinged? " + equals);
return equals;
} catch (ProxyCacheException unused) {
Logger.error("Error reading ping response");
return false;
} finally {
httpUrlSource.close();
}
}
private String getPingUrl() {
return String.format(Locale.US, "http://%s:%d/%s", this.host, Integer.valueOf(this.port), PING_REQUEST);
}
private class PingCallable implements Callable<Boolean> {
private PingCallable() {
}
@Override
public Boolean call() throws Exception {
return Boolean.valueOf(Pinger.this.pingServer());
}
}
}