/** Prepares the socket addresses to attempt for the current proxy or host. */
private void resetNextInetSocketAddress(Proxy proxy) throws UnknownHostException {
// Clear the addresses. Necessary if getAllByName() below throws!
inetSocketAddresses = new ArrayList<>();
String socketHost;
int socketPort;
if (proxy.type() == Proxy.Type.DIRECT || proxy.type() == Proxy.Type.SOCKS) {
socketHost = address.getUriHost();
socketPort = getEffectivePort(uri);
} else {
SocketAddress proxyAddress = proxy.address();
if (!(proxyAddress instanceof InetSocketAddress)) {
throw new IllegalArgumentException(
"Proxy.address() is not an " + "InetSocketAddress: " + proxyAddress.getClass());
}
InetSocketAddress proxySocketAddress = (InetSocketAddress) proxyAddress;
socketHost = getHostString(proxySocketAddress);
socketPort = proxySocketAddress.getPort();
}
// Try each address for best behavior in mixed IPv4/IPv6 environments.
for (InetAddress inetAddress : network.resolveInetAddresses(socketHost)) {
inetSocketAddresses.add(new InetSocketAddress(inetAddress, socketPort));
}
nextInetSocketAddressIndex = 0;
}
/** Returns the next proxy to try. May be PROXY.NO_PROXY but never null. */
private Proxy nextProxy() throws IOException {
if (!hasNextProxy()) {
throw new SocketException(
"No route to " + address.getUriHost() + "; exhausted proxy configurations: " + proxies);
}
Proxy result = proxies.get(nextProxyIndex++);
resetNextInetSocketAddress(result);
return result;
}
/** Returns the next connection spec to try. */
private ConnectionSpec nextConnectionSpec() throws IOException {
if (!hasNextConnectionSpec()) {
throw new SocketException(
"No route to "
+ address.getUriHost()
+ "; exhausted connection specs: "
+ connectionSpecs);
}
return connectionSpecs.get(nextSpecIndex++);
}
/** Returns the next socket address to try. */
private InetSocketAddress nextInetSocketAddress() throws IOException {
if (!hasNextInetSocketAddress()) {
throw new SocketException(
"No route to "
+ address.getUriHost()
+ "; exhausted inet socket addresses: "
+ inetSocketAddresses);
}
InetSocketAddress result = inetSocketAddresses.get(nextInetSocketAddressIndex++);
resetConnectionSpecs();
return result;
}