Package com.github.nhenneaux.resilienthttpclient.singlehostclient

Class SingleHostHttpClientBuilder

java.lang.Object

com.github.nhenneaux.resilienthttpclient.singlehostclient.SingleHostHttpClientBuilder

public class SingleHostHttpClientBuilder
extends Object

Create an HttpClient to target a single host. It validates the certificate to authenticate the server in TLS communication with this single name. It can be used to target a single host using its IP address(es) instead of its hostname while keeping a high protection against Man-in-the-middle attack.

-Djdk.internal.httpclient.disableHostnameVerification is needed to use a custom TLS name matching based on the requested host instead of the one from the URL.

-Djdk.httpclient.allowRestrictedHeaders=Host is needed to customize the HTTP Host header.

Method Summary

Modifier and Type	Method	Description
HttpClient	build()
static SingleHostHttpClientBuilder	builder(String hostname, InetAddress hostAddress, HttpClient.Builder builder)	Build a single hostname client builder.
HttpClient	buildWithHostHeader()	Build a client with HTTP header host overridden in Java 13+
static HttpClient	newHttpClient(String hostname, InetAddress hostAddress)	Build a single hostname client with default configuration.
SingleHostHttpClientBuilder	withSni()
SingleHostHttpClientBuilder	withTlsNameMatching()
SingleHostHttpClientBuilder	withTlsNameMatching(KeyStore trustStore)
SingleHostHttpClientBuilder	withTlsNameMatching(KeyStore trustStore, SSLContext initialSslContext)
SingleHostHttpClientBuilder	withTlsNameMatching(SSLContext initialSslContext)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

newHttpClient

public static HttpClient newHttpClient(String hostname,
                                       InetAddress hostAddress)

Build a single hostname client with default configuration. It uses TLS matching based on the given hostname. It also provides the given hostname in SNI extension. The returned java.net.http.HttpClient is wrapped to force the HTTP header Host with the given hostname.

builder

public static SingleHostHttpClientBuilder builder(String hostname,
                                                  InetAddress hostAddress,
                                                  HttpClient.Builder builder)

Build a single hostname client builder. It could override the following elements of the builder.

• java.net.http.HttpClient.Builder#sslContext(javax.net.ssl.SSLContext) with a custom SSLContext using the given truststore disabling default name validation and using the given hostname
• java.net.http.HttpClient.Builder#sslParameters(javax.net.ssl.SSLParameters) to force the SNI server name expected

withSni

public SingleHostHttpClientBuilder withSni()

withTlsNameMatching

public SingleHostHttpClientBuilder withTlsNameMatching()

withTlsNameMatching

public SingleHostHttpClientBuilder withTlsNameMatching(KeyStore trustStore)

withTlsNameMatching

public SingleHostHttpClientBuilder withTlsNameMatching(SSLContext initialSslContext)

withTlsNameMatching

public SingleHostHttpClientBuilder withTlsNameMatching(KeyStore trustStore,
                                                       SSLContext initialSslContext)

buildWithHostHeader

public HttpClient buildWithHostHeader()

Build a client with HTTP header host overridden in Java 13+

build

public HttpClient build()