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Client.java
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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;
}
}
}