1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package ch.boye.httpclientandroidlib.impl.execchain;
import java.io.IOException;
import java.net.URI;
import java.util.List;
import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;
/* LogFactory removed by HttpClient for Android script. */
import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest;
import ch.boye.httpclientandroidlib.HttpException;
import ch.boye.httpclientandroidlib.HttpHost;
import ch.boye.httpclientandroidlib.HttpRequest;
import ch.boye.httpclientandroidlib.ProtocolException;
import ch.boye.httpclientandroidlib.annotation.ThreadSafe;
import ch.boye.httpclientandroidlib.auth.AuthScheme;
import ch.boye.httpclientandroidlib.auth.AuthState;
import ch.boye.httpclientandroidlib.client.RedirectException;
import ch.boye.httpclientandroidlib.client.RedirectStrategy;
import ch.boye.httpclientandroidlib.client.config.RequestConfig;
import ch.boye.httpclientandroidlib.client.methods.CloseableHttpResponse;
import ch.boye.httpclientandroidlib.client.methods.HttpExecutionAware;
import ch.boye.httpclientandroidlib.client.methods.HttpRequestWrapper;
import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
import ch.boye.httpclientandroidlib.client.utils.URIUtils;
import ch.boye.httpclientandroidlib.conn.routing.HttpRoute;
import ch.boye.httpclientandroidlib.conn.routing.HttpRoutePlanner;
import ch.boye.httpclientandroidlib.util.Args;
import ch.boye.httpclientandroidlib.util.EntityUtils;
/**
* Request executor in the request execution chain that is responsible
* for handling of request redirects.
* <p/>
* Further responsibilities such as communication with the opposite
* endpoint is delegated to the next executor in the request execution
* chain.
*
* @since 4.3
*/
@ThreadSafe
public class RedirectExec implements ClientExecChain {
public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());
private final ClientExecChain requestExecutor;
private final RedirectStrategy redirectStrategy;
private final HttpRoutePlanner routePlanner;
public RedirectExec(
final ClientExecChain requestExecutor,
final HttpRoutePlanner routePlanner,
final RedirectStrategy redirectStrategy) {
super();
Args.notNull(requestExecutor, "HTTP client request executor");
Args.notNull(routePlanner, "HTTP route planner");
Args.notNull(redirectStrategy, "HTTP redirect strategy");
this.requestExecutor = requestExecutor;
this.routePlanner = routePlanner;
this.redirectStrategy = redirectStrategy;
}
public CloseableHttpResponse execute(
final HttpRoute route,
final HttpRequestWrapper request,
final HttpClientContext context,
final HttpExecutionAware execAware) throws IOException, HttpException {
Args.notNull(route, "HTTP route");
Args.notNull(request, "HTTP request");
Args.notNull(context, "HTTP context");
final List<URI> redirectLocations = context.getRedirectLocations();
if (redirectLocations != null) {
redirectLocations.clear();
}
final RequestConfig config = context.getRequestConfig();
final int maxRedirects = config.getMaxRedirects() > 0 ? config.getMaxRedirects() : 50;
HttpRoute currentRoute = route;
HttpRequestWrapper currentRequest = request;
for (int redirectCount = 0;;) {
final CloseableHttpResponse response = requestExecutor.execute(
currentRoute, currentRequest, context, execAware);
try {
if (config.isRedirectsEnabled() &&
this.redirectStrategy.isRedirected(currentRequest, response, context)) {
if (redirectCount >= maxRedirects) {
throw new RedirectException("Maximum redirects ("+ maxRedirects + ") exceeded");
}
redirectCount++;
final HttpRequest redirect = this.redirectStrategy.getRedirect(
currentRequest, response, context);
if (!redirect.headerIterator().hasNext()) {
final HttpRequest original = request.getOriginal();
redirect.setHeaders(original.getAllHeaders());
}
currentRequest = HttpRequestWrapper.wrap(redirect);
if (currentRequest instanceof HttpEntityEnclosingRequest) {
RequestEntityProxy.enhance((HttpEntityEnclosingRequest) currentRequest);
}
final URI uri = currentRequest.getURI();
final HttpHost newTarget = URIUtils.extractHost(uri);
if (newTarget == null) {
throw new ProtocolException("Redirect URI does not specify a valid host name: " +
uri);
}
// Reset virtual host and auth states if redirecting to another host
if (!currentRoute.getTargetHost().equals(newTarget)) {
final AuthState targetAuthState = context.getTargetAuthState();
if (targetAuthState != null) {
this.log.debug("Resetting target auth state");
targetAuthState.reset();
}
final AuthState proxyAuthState = context.getProxyAuthState();
if (proxyAuthState != null) {
final AuthScheme authScheme = proxyAuthState.getAuthScheme();
if (authScheme != null && authScheme.isConnectionBased()) {
this.log.debug("Resetting proxy auth state");
proxyAuthState.reset();
}
}
}
currentRoute = this.routePlanner.determineRoute(newTarget, currentRequest, context);
if (this.log.isDebugEnabled()) {
this.log.debug("Redirecting to '" + uri + "' via " + currentRoute);
}
EntityUtils.consume(response.getEntity());
response.close();
} else {
return response;
}
} catch (final RuntimeException ex) {
response.close();
throw ex;
} catch (final IOException ex) {
response.close();
throw ex;
} catch (final HttpException ex) {
// Protocol exception related to a direct.
// The underlying connection may still be salvaged.
try {
EntityUtils.consume(response.getEntity());
} catch (final IOException ioex) {
this.log.debug("I/O error while releasing connection", ioex);
} finally {
response.close();
}
throw ex;
}
}
}
}
|
