# Atrás de um Proxy { #behind-a-proxy }

Em muitas situações, você usaria um **proxy** como Traefik ou Nginx na frente da sua aplicação FastAPI.

Esses proxies podem lidar com certificados HTTPS e outras coisas.

## Headers Encaminhados pelo Proxy { #proxy-forwarded-headers }

    server.enqueue(MockResponse())

    // Make a first request without certificate pinning. Use it to collect certificates to pin.
    val request1 = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request1).execute()
    val certificatePinnerBuilder = CertificatePinner.Builder()
    for (certificate in response1.handshake!!.peerCertificates) {
      certificatePinnerBuilder.add(

        .addSubjectAlternativeName(server.hostName)
        .build()
    val serverHandshakeCertificates =
      HandshakeCertificates
        .Builder()
        .addTrustedCertificate(clientCa.certificate)
        .heldCertificate(serverCertificate)
        .build()
    server.useHttps(serverHandshakeCertificates.sslSocketFactory(), false)
    server.enqueue(MockResponse().setBody("abc"))
    server.requestClientAuth()

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Date;

import jcifs.smb.SID;

/**
 * Contains user logon information from a PAC (Privilege Attribute Certificate).
 * This class parses and provides access to user authentication and authorization
 * data from Kerberos tickets, including user identity, group memberships, and
 * logon metadata.
 */
public class PacLogonInfo {

- Fixed an issue where the `vsphere` cloud provider would not trust a certificate if:
  - The issuer of the certificate was unknown (`x509.UnknownAuthorityError`)
  - The requested name did not match the set of authorized names (`x509.HostnameError`)

 *   <li>COOKIES_PROPERTY: Cookie settings.</li>
 *   <li>AUTH_SCHEME_PROVIDERS_PROPERTY: Authentication scheme providers.</li>
 *   <li>IGNORE_SSL_CERTIFICATE_PROPERTY: Ignore SSL certificate validation.</li>
 *   <li>DEFAULT_MAX_CONNECTION_PER_ROUTE_PROPERTY: Default maximum connections per route.</li>
 *   <li>MAX_TOTAL_CONNECTION_PROPERTY: Maximum total connections.</li>

	public final fun check (Ljava/lang/String;[Ljava/security/cert/Certificate;)V
	public fun equals (Ljava/lang/Object;)Z
	public final fun findMatchingPins (Ljava/lang/String;)Ljava/util/List;
	public final fun getPins ()Ljava/util/Set;
	public fun hashCode ()I
	public static final fun pin (Ljava/security/cert/Certificate;)Ljava/lang/String;

        .addSubjectAlternativeName(server.hostName)
        .build()
    val serverHandshakeCertificates =
      HandshakeCertificates
        .Builder()
        .addTrustedCertificate(clientCa.certificate)
        .heldCertificate(serverCertificate)
        .build()
    server.useHttps(serverHandshakeCertificates.sslSocketFactory())
    server.enqueue(
      MockResponse
        .Builder()
        .body("abc")

            .rsa2048()
            .build()
        return@lazy HandshakeCertificates
          .Builder()
          .heldCertificate(heldCertificate)
          .addTrustedCertificate(heldCertificate.certificate)
          .build()
      }

      init {
        val platformSystemProperty = getPlatformSystemProperty()

        if (platformSystemProperty == JDK9_PROPERTY) {

first connect fails. This is necessary for IPv4+IPv6 and services hosted in redundant data
centers. OkHttp supports modern TLS features (TLS 1.3, ALPN, certificate pinning). It can be
configured to fall back for broad connectivity.

Using OkHttp is easy. Its request/response API is designed with fluent builders and immutability. It