我试图通过代理发送HTTPS请求,该代理需要使用Apache HttpClient 4.3.1进行抢先认证 .
当我没有在第一个请求中直接验证自己时,我的代理会阻止与我的IP连接几分钟 .
我对普通的HTTP请求没有任何问题,我只是手动将“代理授权”标头添加到请求中 .
但是当尝试加载HTTPS页面时,HttpClient似乎使用HTTP隧道,因此第一个请求是“CONNECT”命令,之后我的实际请求被发送 . 使用request.setHeader(...)方法不会影响CONNECT请求的标头,从而导致“HTTP / 1.0 407需要代理身份验证”响应并关闭我的连接 . 之后,HttpClient再次连接,这次使用我的凭据添加“Proxy-Authorization”头字段 .
连接成功( Build 了HTTP / 1.0 200连接)并且正在执行我的实际GET请求 . 但是当我在那之后再次运行我的程序时,我会得到一个IOException:
信息:处理请求时捕获的I / O异常(java.net.SocketException):连接重置
在Wireshark中,我可以看到,代理不再响应我的"CONNECT"请求(不包含凭据) . 所以我尝试了几种方法让HttpClient在第一个CONNECT请求中发送凭据:我改编了这个example来使用代理并为代理创建了AuthCache,但它没有用 . 我还尝试将HttpRequestInterceptor添加到我的客户端:
static class PreemptiveAuth implements HttpRequestInterceptor {
@Override
public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
request.setHeader("Proxy-Authorization", "Basic <base64credentials>");
}
}
但这也不会影响“CONNECT”请求 . 这是我的其余代码:
public class ClientProxyAuthentication {
public static void main(String[] args) throws IOException, InterruptedException {
HttpHost targetHost = new HttpHost("www.google.com", 443, "https");
HttpHost proxy = new HttpHost("<proxy-ip>", 21265, "http");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(
new AuthScope("<proxy-ip>", 21265),
new UsernamePasswordCredentials("username", "pass"));
CloseableHttpClient httpclient = HttpClients.custom()
.addInterceptorFirst(new PreemptiveAuth())
.setProxy(proxy)
.setProxyAuthenticationStrategy(new ProxyAuthenticationStrategy())
.setDefaultCredentialsProvider(credsProvider).build();
try {
HttpGet httpget = new HttpGet("/");
httpget.setHeader("Proxy-Authorization", "Basic <base64credentials>");
System.out.println("executing request: " + httpget.getRequestLine());
System.out.println("via proxy: " + proxy);
System.out.println("to target: " + targetHost);
CloseableHttpResponse response = httpclient.execute(targetHost, httpget);
try {
HttpEntity entity = response.getEntity();
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println("Response content length: " + entity.getContentLength());
}
String html = EntityUtils.toString(entity, "UTF-8");
System.out.println(html);
EntityUtils.consume(entity);
} finally {
response.close();
}
} finally {
httpclient.close();
}
}
1 回答
我怀疑你没有正确初始化auth缓存 . 请试试这个 .