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28 package org.apache.hc.core5.http.protocol;
29
30 import java.io.IOException;
31
32 import org.apache.hc.core5.annotation.Contract;
33 import org.apache.hc.core5.annotation.ThreadingBehavior;
34 import org.apache.hc.core5.http.EntityDetails;
35 import org.apache.hc.core5.http.HttpException;
36 import org.apache.hc.core5.http.HttpHeaders;
37 import org.apache.hc.core5.http.HttpRequest;
38 import org.apache.hc.core5.http.HttpRequestInterceptor;
39 import org.apache.hc.core5.http.HttpVersion;
40 import org.apache.hc.core5.http.Method;
41 import org.apache.hc.core5.http.ProtocolException;
42 import org.apache.hc.core5.http.ProtocolVersion;
43 import org.apache.hc.core5.net.URIAuthority;
44 import org.apache.hc.core5.util.Args;
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52 @Contract(threading = ThreadingBehavior.IMMUTABLE)
53 public class RequestTargetHost implements HttpRequestInterceptor {
54
55 public RequestTargetHost() {
56 super();
57 }
58
59 @Override
60 public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context)
61 throws HttpException, IOException {
62 Args.notNull(request, "HTTP request");
63 Args.notNull(context, "HTTP context");
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65 final ProtocolVersion ver = context.getProtocolVersion();
66 final String method = request.getMethod();
67 if (Method.CONNECT.isSame(method) && ver.lessEquals(HttpVersion.HTTP_1_0)) {
68 return;
69 }
70
71 if (!request.containsHeader(HttpHeaders.HOST)) {
72 URIAuthority authority = request.getAuthority();
73 if (authority == null) {
74 if (ver.lessEquals(HttpVersion.HTTP_1_0)) {
75 return;
76 }
77 throw new ProtocolException("Target host is unknown");
78 }
79 if (authority.getUserInfo() != null) {
80 authority = new URIAuthority(authority.getHostName(), authority.getPort());
81 }
82 request.addHeader(HttpHeaders.HOST, authority);
83 }
84 }
85
86 }