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28 package org.apache.hc.core5.http.protocol;
29
30 import java.io.IOException;
31 import java.net.URISyntaxException;
32
33 import org.apache.hc.core5.annotation.Contract;
34 import org.apache.hc.core5.annotation.ThreadingBehavior;
35 import org.apache.hc.core5.http.EntityDetails;
36 import org.apache.hc.core5.http.Header;
37 import org.apache.hc.core5.http.HttpException;
38 import org.apache.hc.core5.http.HttpHeaders;
39 import org.apache.hc.core5.http.HttpRequest;
40 import org.apache.hc.core5.http.HttpRequestInterceptor;
41 import org.apache.hc.core5.http.HttpVersion;
42 import org.apache.hc.core5.http.ProtocolException;
43 import org.apache.hc.core5.http.ProtocolVersion;
44 import org.apache.hc.core5.net.URIAuthority;
45 import org.apache.hc.core5.util.Args;
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54 @Contract(threading = ThreadingBehavior.IMMUTABLE)
55 public class RequestValidateHost implements HttpRequestInterceptor {
56
57 public RequestValidateHost() {
58 super();
59 }
60
61 @Override
62 public void process(final HttpRequest request, final EntityDetails entity, final HttpContext context)
63 throws HttpException, IOException {
64 Args.notNull(request, "HTTP request");
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66 final Header header = request.getHeader(HttpHeaders.HOST);
67 if (header != null) {
68 final URIAuthority authority;
69 try {
70 authority = URIAuthority.create(header.getValue());
71 } catch (final URISyntaxException ex) {
72 throw new ProtocolException(ex.getMessage(), ex);
73 }
74 request.setAuthority(authority);
75 } else {
76 final ProtocolVersion version = request.getVersion() != null ? request.getVersion() : HttpVersion.HTTP_1_1;
77 if (version.greaterEquals(HttpVersion.HTTP_1_1)) {
78 throw new ProtocolException("Host header is absent");
79 }
80 }
81 }
82
83 }