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/*

* Copyright © 2012 The Feign Authors (feign@commonhaus.dev)

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package feign;

import static feign.Util.checkArgument;

import static feign.Util.checkNotNull;

import static feign.Util.isNotBlank;

import feign.Request.Options;

import java.io.IOException;

import java.net.HttpURLConnection;

import java.net.Proxy;

import java.net.URL;

import java.nio.charset.StandardCharsets;

import java.util.Base64;

import javax.net.ssl.HostnameVerifier;

import javax.net.ssl.SSLSocketFactory;

/** Submits HTTP {@link Request requests}. Implementations are expected to be thread-safe. */

public interface Client {

/**

* Executes a request against its {@link Request#url() url} and returns a response.

*

* @param request safe to replay.

* @param options options to apply to this request.

* @return connected response, {@link Response.Body} is absent or unread.

* @throws IOException on a network error connecting to {@link Request#url()}.

*/

Response execute(Request request, Options options) throws IOException;

/**

* @deprecated use {@link DefaultClient} instead.

*/

@Deprecated

class Default extends DefaultClient {

public Default(SSLSocketFactory sslContextFactory, HostnameVerifier hostnameVerifier) {

super(sslContextFactory, hostnameVerifier);

}

public Default(

SSLSocketFactory sslContextFactory,

HostnameVerifier hostnameVerifier,

boolean disableRequestBuffering) {

super(sslContextFactory, hostnameVerifier, disableRequestBuffering);

}

}

/** Client that supports a {@link java.net.Proxy}. */

class Proxied extends Default {

public static final String PROXY_AUTHORIZATION = "Proxy-Authorization";

private final Proxy proxy;

private String credentials;

public Proxied(

SSLSocketFactory sslContextFactory, HostnameVerifier hostnameVerifier, Proxy proxy) {

super(sslContextFactory, hostnameVerifier);

checkNotNull(proxy, "a proxy is required.");

this.proxy = proxy;

}

public Proxied(

SSLSocketFactory sslContextFactory,

HostnameVerifier hostnameVerifier,

Proxy proxy,

String proxyUser,

String proxyPassword) {

this(sslContextFactory, hostnameVerifier, proxy);

checkArgument(isNotBlank(proxyUser), "proxy user is required.");

checkArgument(isNotBlank(proxyPassword), "proxy password is required.");

this.credentials = basic(proxyUser, proxyPassword);

}

@Override

public HttpURLConnection getConnection(URL url) throws IOException {

HttpURLConnection connection = (HttpURLConnection) url.openConnection(this.proxy);

if (isNotBlank(this.credentials)) {

connection.addRequestProperty(PROXY_AUTHORIZATION, this.credentials);

}

return connection;

}

public String getCredentials() {

return this.credentials;

}

private String basic(String username, String password) {

String token = username + ":" + password;

byte[] bytes = token.getBytes(StandardCharsets.ISO_8859_1);

String encoded = Base64.getEncoder().encodeToString(bytes);

return "Basic " + encoded;

}

}

}