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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.server.jetty;
import com.yahoo.container.logging.AccessLogEntry;
import com.yahoo.jdisc.Metric.Context;
import com.yahoo.jdisc.References;
import com.yahoo.jdisc.ResourceReference;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.handler.BindingNotFoundException;
import com.yahoo.jdisc.handler.ContentChannel;
import com.yahoo.jdisc.handler.OverloadException;
import com.yahoo.jdisc.handler.RequestHandler;
import com.yahoo.jdisc.http.HttpHeaders;
import com.yahoo.jdisc.http.HttpRequest;
import org.eclipse.jetty.server.HttpConnection;
import javax.servlet.AsyncContext;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.logging.Level;
import java.util.logging.Logger;
import static com.yahoo.jdisc.http.HttpHeaders.Values.APPLICATION_X_WWW_FORM_URLENCODED;
import static com.yahoo.jdisc.http.server.jetty.Exceptions.throwUnchecked;
/**
* @author Simon Thoresen Hult
*/
class HttpRequestDispatch {
private static final Logger log = Logger.getLogger(HttpRequestDispatch.class.getName());
private final static String CHARSET_ANNOTATION = ";charset=";
private final JDiscContext jDiscContext;
private final AsyncContext async;
private final HttpServletRequest servletRequest;
private final ServletResponseController servletResponseController;
private final RequestHandler requestHandler;
private final MetricReporter metricReporter;
public HttpRequestDispatch(JDiscContext jDiscContext,
AccessLogEntry accessLogEntry,
Context metricContext,
HttpServletRequest servletRequest,
HttpServletResponse servletResponse) throws IOException {
this.jDiscContext = jDiscContext;
requestHandler = newRequestHandler(jDiscContext, accessLogEntry, servletRequest);
this.metricReporter = new MetricReporter(jDiscContext.metric, metricContext,
((org.eclipse.jetty.server.Request) servletRequest).getTimeStamp());
this.servletRequest = servletRequest;
honourMaxKeepAliveRequests();
this.servletResponseController = new ServletResponseController(
servletRequest,
servletResponse,
jDiscContext.janitor,
metricReporter,
jDiscContext.developerMode());
this.async = servletRequest.startAsync();
async.setTimeout(0);
}
public void dispatch() throws IOException {
ServletRequestReader servletRequestReader;
try {
servletRequestReader = handleRequest();
} catch (Throwable throwable) {
servletResponseController.trySendError(throwable);
servletResponseController.finishedFuture().whenComplete((result, exception) ->
completeRequestCallback.accept(null, throwable));
return;
}
try {
onError(servletRequestReader.finishedFuture,
servletResponseController::trySendError);
onError(servletResponseController.finishedFuture(),
servletRequestReader::onError);
CompletableFuture.allOf(servletRequestReader.finishedFuture, servletResponseController.finishedFuture())
.whenComplete(completeRequestCallback);
} catch (Throwable throwable) {
log.log(Level.WARNING, "Failed registering finished listeners.", throwable);
}
}
private void honourMaxKeepAliveRequests() {
if (jDiscContext.serverConfig.maxKeepAliveRequests() > 0) {
HttpConnection connection = JDiscHttpServlet.getConnection(servletRequest);
if (connection.getMessagesIn() >= jDiscContext.serverConfig.maxKeepAliveRequests()) {
connection.getGenerator().setPersistent(false);
}
}
}
private BiConsumer<Void, Throwable> completeRequestCallback;
{
AtomicBoolean completeRequestCalled = new AtomicBoolean(false);
HttpRequestDispatch parent = this; //used to avoid binding uninitialized variables
completeRequestCallback = (result, error) -> {
boolean alreadyCalled = completeRequestCalled.getAndSet(true);
if (alreadyCalled) {
AssertionError e = new AssertionError("completeRequest called more than once");
log.log(Level.WARNING, "Assertion failed.", e);
throw e;
}
boolean reportedError = false;
if (error != null) {
if (!(error instanceof OverloadException || error instanceof BindingNotFoundException)) {
log.log(Level.WARNING, "Request failed: " + parent.servletRequest.getRequestURI(), error);
}
reportedError = true;
parent.metricReporter.failedResponse();
} else {
parent.metricReporter.successfulResponse();
}
try {
parent.async.complete();
log.finest(() -> "Request completed successfully: " + parent.servletRequest.getRequestURI());
} catch (Throwable throwable) {
Level level = reportedError ? Level.FINE: Level.WARNING;
log.log(level, "async.complete failed", throwable);
}
};
}
@SuppressWarnings("try")
private ServletRequestReader handleRequest() throws IOException {
HttpRequest jdiscRequest = HttpRequestFactory.newJDiscRequest(jDiscContext.container, servletRequest);
ContentChannel requestContentChannel;
try (ResourceReference ref = References.fromResource(jdiscRequest)) {
HttpRequestFactory.copyHeaders(servletRequest, jdiscRequest);
requestContentChannel = requestHandler.handleRequest(jdiscRequest, servletResponseController.responseHandler);
}
ServletInputStream servletInputStream = servletRequest.getInputStream();
ServletRequestReader servletRequestReader =
new ServletRequestReader(
servletInputStream,
requestContentChannel,
jDiscContext.janitor,
metricReporter);
servletInputStream.setReadListener(servletRequestReader);
return servletRequestReader;
}
private static void onError(CompletableFuture<?> future, Consumer<Throwable> errorHandler) {
future.whenComplete((result, exception) -> {
if (exception != null) {
errorHandler.accept(exception);
}
});
}
ContentChannel handleRequestFilterResponse(Response response) {
try {
servletRequest.getInputStream().close();
ContentChannel responseContentChannel = servletResponseController.responseHandler.handleResponse(response);
servletResponseController.finishedFuture().whenComplete(completeRequestCallback);
return responseContentChannel;
} catch (IOException e) {
throw throwUnchecked(e);
}
}
private static RequestHandler newRequestHandler(JDiscContext context,
AccessLogEntry accessLogEntry,
HttpServletRequest servletRequest) {
RequestHandler requestHandler = wrapHandlerIfFormPost(
new FilteringRequestHandler(context.requestFilters, context.responseFilters),
servletRequest, context.serverConfig.removeRawPostBodyForWwwUrlEncodedPost());
return new AccessLoggingRequestHandler(requestHandler, accessLogEntry);
}
private static RequestHandler wrapHandlerIfFormPost(RequestHandler requestHandler,
HttpServletRequest servletRequest,
boolean removeBodyForFormPost) {
if (!servletRequest.getMethod().equals("POST")) {
return requestHandler;
}
String contentType = servletRequest.getHeader(HttpHeaders.Names.CONTENT_TYPE);
if (contentType == null) {
return requestHandler;
}
if (!contentType.startsWith(APPLICATION_X_WWW_FORM_URLENCODED)) {
return requestHandler;
}
return new FormPostRequestHandler(requestHandler, getCharsetName(contentType), removeBodyForFormPost);
}
private static String getCharsetName(String contentType) {
if (!contentType.startsWith(CHARSET_ANNOTATION, APPLICATION_X_WWW_FORM_URLENCODED.length())) {
return StandardCharsets.UTF_8.name();
}
return contentType.substring(APPLICATION_X_WWW_FORM_URLENCODED.length() + CHARSET_ANNOTATION.length());
}
}
|
