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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | |
2 // for details. All rights reserved. Use of this source code is governed by a | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 | |
5 library safe_http_server; | |
6 | |
7 import 'dart:async'; | |
8 import 'dart:io'; | |
9 import 'dart:uri'; | |
10 | |
11 // TODO(nweiz): remove this when issue 9140 is fixed. | |
12 /// A wrapper around [HttpServer] that swallows errors caused by requests | |
13 /// behaving badly. This provides the following guarantees: | |
14 /// | |
15 /// * The [SafeHttpServer.listen] onError callback will only emit server-wide | |
16 /// errors. It will not emit errors for requests that were unparseable or | |
17 /// where the connection was closed too soon. | |
18 /// * [HttpResponse.done] will emit no errors. | |
19 /// | |
20 /// The [HttpRequest] data stream can still emit errors. | |
21 class SafeHttpServer extends StreamView<HttpRequest> implements HttpServer { | |
22 final HttpServer _inner; | |
23 | |
24 static Future<SafeHttpServer> bind([String host = "127.0.0.1", | |
25 int port = 0, int backlog = 0]) { | |
26 return HttpServer.bind(host, port, backlog) | |
27 .then((server) => new SafeHttpServer(server)); | |
28 } | |
29 | |
30 SafeHttpServer(HttpServer server) | |
31 : super(server), | |
32 _inner = server; | |
33 | |
34 void close() => _inner.close(); | |
35 | |
36 int get port => _inner.port; | |
37 | |
38 set sessionTimeout(int timeout) { | |
39 _inner.sessionTimeout = timeout; | |
40 } | |
41 | |
42 HttpConnectionsInfo connectionsInfo() => _inner.connectionsInfo(); | |
43 | |
44 StreamSubscription<HttpRequest> listen(void onData(HttpRequest value), | |
45 {void onError(error), void onDone(), | |
46 bool cancelOnError: false}) { | |
47 var subscription; | |
48 subscription = super.listen((request) { | |
49 onData(new _HttpRequestWrapper(request)); | |
50 }, onError: (error) { | |
51 // Ignore socket error 104, which is caused by a request being cancelled | |
52 // before it writes any headers. There's no reason to care about such | |
53 // requests. | |
54 if (error is SocketIOException && error.osError.errorCode == 104) return; | |
55 // Ignore any parsing errors, which come from malformed requests. | |
56 if (error is HttpParserException) return; | |
57 // Manually handle cancelOnError so the above (ignored) errors don't | |
58 // cause unsubscription. | |
59 if (cancelOnError) subscription.cancel(); | |
60 if (onError != null) onError(error); | |
61 }, onDone: onDone); | |
62 return subscription; | |
63 } | |
64 } | |
65 | |
66 /// A wrapper around [HttpRequest] for the sole purpose of swallowing errors on | |
67 /// [HttpResponse.done]. | |
68 class _HttpRequestWrapper extends StreamView<List<int>> implements HttpRequest { | |
69 final HttpRequest _inner; | |
70 final HttpResponse response; | |
71 | |
72 _HttpRequestWrapper(HttpRequest inner) | |
73 : super(inner), | |
74 _inner = inner, | |
75 response = new _HttpResponseWrapper(inner.response); | |
76 | |
77 int get contentLength => _inner.contentLength; | |
78 String get method => _inner.method; | |
79 Uri get uri => _inner.uri; | |
80 Map<String, String> get queryParameters => _inner.queryParameters; | |
81 HttpHeaders get headers => _inner.headers; | |
82 List<Cookie> get cookies => _inner.cookies; | |
83 bool get persistentConnection => _inner.persistentConnection; | |
84 X509Certificate get certificate => _inner.certificate; | |
85 HttpSession get session => _inner.session; | |
86 String get protocolVersion => _inner.protocolVersion; | |
87 HttpConnectionInfo get connectionInfo => _inner.connectionInfo; | |
88 } | |
89 | |
90 /// A wrapper around [HttpResponse] for the sole purpose of swallowing errors on | |
91 /// [done]. | |
92 class _HttpResponseWrapper implements HttpResponse { | |
93 final HttpResponse _inner; | |
94 Future<HttpResponse> _done; | |
95 | |
96 _HttpResponseWrapper(this._inner); | |
97 | |
98 /// Swallows all errors from writing to the response. | |
99 Future<HttpResponse> get done { | |
100 if (_done == null) _done = _inner.done.catchError((_) {}); | |
101 return _done; | |
102 } | |
103 | |
104 int get contentLength => _inner.contentLength; | |
105 set contentLength(int value) { | |
106 _inner.contentLength = value; | |
107 } | |
108 | |
109 int get statusCode => _inner.statusCode; | |
110 set statusCode(int value) { | |
111 _inner.statusCode = value; | |
112 } | |
113 | |
114 String get reasonPhrase => _inner.reasonPhrase; | |
115 set reasonPhrase(String value) { | |
116 _inner.reasonPhrase = value; | |
117 } | |
118 | |
119 bool get persistentConnection => _inner.persistentConnection; | |
120 set persistentConnection(bool value) { | |
121 _inner.persistentConnection = value; | |
122 } | |
123 | |
124 Encoding get encoding => _inner.encoding; | |
125 set encoding(Encoding value) { | |
126 _inner.encoding = value; | |
127 } | |
128 | |
129 HttpHeaders get headers => _inner.headers; | |
130 List<Cookie> get cookies => _inner.cookies; | |
131 Future<Socket> detachSocket() => _inner.detachSocket(); | |
132 HttpConnectionInfo get connectionInfo => _inner.connectionInfo; | |
133 void add(List<int> data) => _inner.add(data); | |
134 Future<HttpResponse> addStream(Stream<List<int>> stream) => | |
135 _inner.addStream(stream); | |
136 Future close() => _inner.close(); | |
137 void write(Object obj) => _inner.write(obj); | |
138 void writeAll(Iterable objects, [String separator = ""]) => | |
139 _inner.writeAll(objects, separator); | |
140 void writeCharCode(int charCode) => _inner.writeCharCode(charCode); | |
141 void writeln([Object obj = ""]) => _inner.writeln(obj); | |
142 void addError(error) => _inner.addError(error); | |
143 } | |
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