【发布时间】:2018-09-07 13:49:24
【问题描述】:
说明
我正在尝试通过需要身份验证的代理连接到使用 https 的 Web 服务器,但它不起作用。
HttpsURLConnection 类正在发送第一个打开隧道的请求,即使是强制的,也没有 « Proxy-Authorization » 标头。
在这种情况下,服务器将返回 « 407 Proxy Authentication Required »。
重现问题的代码
public class TestProxy {
@Test
public void testOne() throws IOException {
final String PROXY_USERNAME = "username";
final String PROXY_PASSWORD = "password";
final String PROXY_HOSTNAME = "hostname";
final int PROXY_PORT = 8080;
Authenticator.setDefault(
new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(PROXY_USERNAME, PROXY_PASSWORD.toCharArray());
}
});
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(PROXY_HOSTNAME, PROXY_PORT));
URL url = new URL("https://www.google.com");
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection(proxy);
assertNotEquals(407, connection.getResponseCode());
}
@Test
public void testTwo() throws IOException {
final String PROXY_USERNAME = "username";
final String PROXY_PASSWORD = "password";
final String PROXY_HOSTNAME = "hostname";
final int PROXY_PORT = 8080;
Authenticator.setDefault(
new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(PROXY_USERNAME, PROXY_PASSWORD.toCharArray());
}
});
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(PROXY_HOSTNAME, PROXY_PORT));
URL url = new URL("https://www.google.com");
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection(proxy);
String userCredentials = PROXY_USERNAME + ":" + PROXY_PASSWORD;
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userCredentials.getBytes()));
connection.setRequestProperty("Proxy-Authorization", basicAuth);
assertNotEquals(407, connection.getResponseCode());
}
}
发送的请求
CONNECT www.google.com:443 HTTP/1.1
User-Agent: Java/1.8.0_162
Host: www.google.com
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Proxy-Connection: keep-alive
可能的原因
我认为这种行为是由方法sun.net.www.protocol.http.HttpURLConnection.sendCONNECTRequest()引起的
它创建一个新的“连接请求”而不添加“代理授权”标头。
解决方法
解决方法是首先连接到一个 http 地址,这样代理服务器将注册用户代理并授权连接而不添加 Proxy-Authorization 标头
jdk版本为1.8.0_181-b13。
【问题讨论】:
标签: java https proxy httpurlconnection