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1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 * Use of this source code is governed by a BSD-style license that can be | |
3 * found in the LICENSE file. | |
4 */ | |
5 | |
6 /** | |
7 * This file defines the <code>PPB_WebSocket_Dev</code> interface. | |
8 */ | |
9 label Chrome { | |
10 M17 = 0.1 | |
11 }; | |
12 | |
13 | |
14 /** | |
15 * This enumeration contains the types representing the WebSocket ready state | |
16 * and these states are based on the JavaScript WebSocket API specification. | |
17 * GetReadyState() returns one of these states. | |
18 */ | |
19 [assert_size(4)] | |
20 enum PP_WebSocketReadyState_Dev { | |
21 /** | |
22 * Ready state is queried on an invalid resource. | |
23 */ | |
24 PP_WEBSOCKETREADYSTATE_INVALID_DEV = -1, | |
25 /** | |
26 * Ready state that the connection has not yet been established. | |
27 */ | |
28 PP_WEBSOCKETREADYSTATE_CONNECTING_DEV = 0, | |
29 | |
30 /** | |
31 * Ready state that the WebSocket connection is established and communication | |
32 * is possible. | |
33 */ | |
34 PP_WEBSOCKETREADYSTATE_OPEN_DEV = 1, | |
35 | |
36 /** | |
37 * Ready state that the connection is going through the closing handshake. | |
38 */ | |
39 PP_WEBSOCKETREADYSTATE_CLOSING_DEV = 2, | |
40 | |
41 /** | |
42 * Ready state that the connection has been closed or could not be opened. | |
43 */ | |
44 PP_WEBSOCKETREADYSTATE_CLOSED_DEV = 3 | |
45 }; | |
46 | |
47 interface PPB_WebSocket_Dev { | |
48 /** | |
49 * Create() creates a WebSocket instance. | |
50 * | |
51 * @param[in] instance A <code>PP_Instance</code> identifying the instance | |
52 * with the WebSocket. | |
53 * | |
54 * @return A <code>PP_Resource</code> corresponding to a WebSocket if | |
55 * successful. | |
56 */ | |
57 PP_Resource Create([in] PP_Instance instance); | |
58 | |
59 /** | |
60 * IsWebSocket() determines if the provided <code>resource</code> is a | |
61 * WebSocket instance. | |
62 * | |
63 * @param[in] resource A <code>PP_Resource</code> corresponding to a | |
64 * WebSocket. | |
65 * | |
66 * @return Returns <code>PP_TRUE</code> if <code>resource</code> is a | |
67 * <code>PPB_WebSocket_Dev</code>, <code>PP_FALSE</code> if the | |
68 * <code>resource</code> is invalid or some type other than | |
69 * <code>PPB_WebSocket_Dev</code>. | |
70 */ | |
71 PP_Bool IsWebSocket([in] PP_Resource resource); | |
72 | |
73 /** | |
74 * Connect() connects to the specified WebSocket server. Caller can call this | |
75 * method at most once for a <code>web_socket</code>. | |
76 * | |
77 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
78 * WebSocket. | |
79 * | |
80 * @param[in] url A <code>PP_Var</code> representing a WebSocket server URL. | |
81 * The <code>PP_VarType</code> must be <code>PP_VARTYPE_STRING</code>. | |
82 * | |
83 * @param[in] protocols A pointer to an array of <code>PP_Var</code> | |
84 * specifying sub-protocols. Each <code>PP_Var</code> represents one | |
85 * sub-protocol and its <code>PP_VarType</code> must be | |
86 * <code>PP_VARTYPE_STRING</code>. This argument can be null only if | |
87 * <code>protocol_count</code> is 0. | |
88 * | |
89 * @param[in] protocol_count The number of sub-protocols in | |
90 * <code>protocols</code>. | |
91 * | |
92 * @param[in] callback A <code>PP_CompletionCallback</code> which is called | |
93 * when a connection is established or an error occurs in establishing | |
94 * connection. | |
95 * | |
96 * @return An int32_t containing an error code from <code>pp_errors.h</code>. | |
97 * Returns <code>PP_ERROR_BADARGUMENT</code> if specified <code>url</code>, | |
98 * or <code>protocols</code> contains invalid string as | |
99 * <code>The WebSocket API specification</code> defines. It corresponds to | |
100 * SyntaxError of the specification. | |
101 * Returns <code>PP_ERROR_NOACCESS</code> if the protocol specified in the | |
102 * <code>url</code> is not a secure protocol, but the origin of the caller | |
103 * has a secure scheme. Also returns it if the port specified in the | |
104 * <code>url</code> is a port to which the user agent is configured to block | |
105 * access because the port is a well-known port like SMTP. It corresponds to | |
106 * SecurityError of the specification. | |
107 * Returns <code>PP_ERROR_INPROGRESS</code> if the call is not the first | |
108 * time. | |
109 */ | |
110 int32_t Connect([in] PP_Resource web_socket, | |
111 [in] PP_Var url, | |
112 [in, size_as=protocol_count] PP_Var[] protocols, | |
113 [in] uint32_t protocol_count, | |
114 [in] PP_CompletionCallback callback); | |
115 | |
116 /** | |
117 * Close() closes the specified WebSocket connection by specifying | |
118 * <code>code</code> and <code>reason</code>. | |
119 * | |
120 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
121 * WebSocket. | |
122 * | |
123 * @param[in] code The WebSocket close code. Ignored if it is 0. | |
124 * | |
125 * @param[in] reason A <code>PP_Var</code> which represents the WebSocket | |
126 * close reason. Ignored if it is <code>PP_VARTYPE_UNDEFINED</code>. | |
127 * Otherwise, its <code>PP_VarType</code> must be | |
128 * <code>PP_VARTYPE_STRING</code>. | |
129 * | |
130 * @param[in] callback A <code>PP_CompletionCallback</code> which is called | |
131 * when the connection is closed or an error occurs in closing the | |
132 * connection. | |
133 * | |
134 * @return An int32_t containing an error code from <code>pp_errors.h</code>. | |
135 * Returns <code>PP_ERROR_BADARGUMENT</code> if <code>reason</code> contains | |
136 * an invalid character as a UTF-8 string, or longer than 123 bytes. It | |
137 * corresponds to JavaScript SyntaxError of the specification. | |
138 * Returns <code>PP_ERROR_NOACCESS</code> if the code is not an integer | |
139 * equal to 1000 or in the range 3000 to 4999. It corresponds to | |
140 * InvalidAccessError of the specification. Returns | |
141 * <code>PP_ERROR_INPROGRESS</code> if the call is not the first time. | |
142 */ | |
143 int32_t Close([in] PP_Resource web_socket, | |
144 [in] uint16_t code, | |
145 [in] PP_Var reason, | |
146 [in] PP_CompletionCallback callback); | |
147 | |
148 /** | |
149 * ReceiveMessage() receives a message from the WebSocket server. | |
150 * This interface only returns a single message. That is, this interface must | |
151 * be called at least N times to receive N messages, no matter how small each | |
152 * message is. | |
153 * | |
154 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
155 * WebSocket. | |
156 * | |
157 * @param[out] message The received message is copied to provided | |
158 * <code>message</code>. The <code>message</code> must remain valid until | |
159 * the ReceiveMessage operation completes. Its <code>PP_VarType</code> | |
160 * will be <code>PP_VARTYPE_STRING</code> or | |
161 * <code>PP_VARTYPE_ARRAY_BYFFER</code> on receiving. | |
162 * | |
163 * @param[in] callback A <code>PP_CompletionCallback</code> which is called | |
164 * when the receiving message is completed. It is ignored if ReceiveMessage | |
165 * completes synchronously and returns <code>PP_OK</code>. | |
166 * | |
167 * @return An int32_t containing an error code from <code>pp_errors.h</code>. | |
168 * If an error is detected or connection is closed, returns | |
169 * <code>PP_ERROR_FAILED</code> after all buffered messages are received. | |
170 * Until buffered message become empty, continues to returns | |
171 * <code>PP_OK</code> as if connection is still established without errors. | |
172 */ | |
173 int32_t ReceiveMessage([in] PP_Resource web_socket, | |
174 [out] PP_Var message, | |
175 [in] PP_CompletionCallback callback); | |
176 | |
177 /** | |
178 * SendMessage() sends a message to the WebSocket server. | |
179 * | |
180 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
181 * WebSocket. | |
182 * | |
183 * @param[in] message A message to send. The message is copied to internal | |
184 * buffer. So caller can free <code>message</code> safely after returning | |
185 * from the function. Its <code>PP_VarType</code> must be | |
186 * <code>PP_VARTYPE_STRING</code> or <code>PP_VARTYPE_ARRAY_BUFFER</code>. | |
187 * | |
188 * @return An int32_t containing an error code from <code>pp_errors.h</code>. | |
189 * Returns <code>PP_ERROR_FAILED</code> if the ReadyState is | |
190 * <code>PP_WEBSOCKETREADYSTATE_CONNECTING_DEV</code>. It corresponds | |
191 * JavaScript InvalidStateError of the specification. | |
192 * Returns <code>PP_ERROR_BADARGUMENT</code> if provided <code>message</code> | |
193 * of string type contains an invalid character as a UTF-8 string. It | |
194 * corresponds to JavaScript SyntaxError of the specification. | |
195 * Otherwise, returns <code>PP_OK</code>, but it doesn't necessarily mean | |
196 * that the server received the message. | |
197 */ | |
198 int32_t SendMessage([in] PP_Resource web_socket, | |
199 [in] PP_Var message); | |
200 | |
201 /** | |
202 * GetBufferedAmount() returns the number of bytes of text and binary | |
203 * messages that have been queued for the WebSocket connection to send but | |
204 * have not been transmitted to the network yet. | |
205 * | |
206 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
207 * WebSocket. | |
208 * | |
209 * @return Returns the number of bytes. | |
210 */ | |
211 uint64_t GetBufferedAmount([in] PP_Resource web_socket); | |
212 | |
213 /** | |
214 * GetCloseCode() returns the connection close code for the WebSocket | |
215 * connection. | |
216 * | |
217 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
218 * WebSocket. | |
219 * | |
220 * @return Returns 0 if called before the close code is set. | |
221 */ | |
222 uint16_t GetCloseCode([in] PP_Resource web_socket); | |
223 | |
224 /** | |
225 * GetCloseReason() returns the connection close reason for the WebSocket | |
226 * connection. | |
227 * | |
228 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
229 * WebSocket. | |
230 * | |
231 * @return Returns a <code>PP_VARTYPE_STRING</code> var. If called before the | |
232 * close reason is set, it contains an empty string. Returns a | |
233 * <code>PP_VARTYPE_UNDEFINED</code> if called on an invalid resource. | |
234 */ | |
235 PP_Var GetCloseReason([in] PP_Resource web_socket); | |
236 | |
237 /** | |
238 * GetCloseWasClean() returns if the connection was closed cleanly for the | |
239 * specified WebSocket connection. | |
240 * | |
241 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
242 * WebSocket. | |
243 * | |
244 * @return Returns <code>PP_FALSE</code> if called before the connection is | |
245 * closed, or called on an invalid resource. Otherwise, returns | |
246 * <code>PP_TRUE</code> if the connection was closed cleanly, or returns | |
247 * <code>PP_FALSE</code> if the connection was closed for abnormal reasons. | |
248 */ | |
249 PP_Bool GetCloseWasClean([in] PP_Resource web_socket); | |
250 | |
251 /** | |
252 * GetExtensions() returns the extensions selected by the server for the | |
253 * specified WebSocket connection. | |
254 * | |
255 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
256 * WebSocket. | |
257 * | |
258 * @return Returns a <code>PP_VARTYPE_STRING</code> var. If called before the | |
259 * connection is established, its data is an empty string. Returns a | |
260 * <code>PP_VARTYPE_UNDEFINED</code> if called on an invalid resource. | |
261 * Currently its data for valid resources are always an empty string. | |
262 */ | |
263 PP_Var GetExtensions([in] PP_Resource web_socket); | |
264 | |
265 /** | |
266 * GetProtocol() returns the sub-protocol chosen by the server for the | |
267 * specified WebSocket connection. | |
268 * | |
269 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
270 * WebSocket. | |
271 * | |
272 * @return Returns a <code>PP_VARTYPE_STRING</code> var. If called before the | |
273 * connection is established, it contains the empty string. Returns a | |
274 * <code>PP_VARTYPE_UNDEFINED</code> if called on an invalid resource. | |
275 */ | |
276 PP_Var GetProtocol([in] PP_Resource web_socket); | |
277 | |
278 /** | |
279 * GetReadyState() returns the ready state of the specified WebSocket | |
280 * connection. | |
281 * | |
282 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
283 * WebSocket. | |
284 * | |
285 * @return Returns <code>PP_WEBSOCKETREADYSTATE_INVALID_DEV</code> if called | |
286 * before connect() is called, or called on an invalid resource. | |
287 */ | |
288 PP_WebSocketReadyState_Dev GetReadyState([in] PP_Resource web_socket); | |
289 | |
290 /** | |
291 * GetURL() returns the URL associated with specified WebSocket connection. | |
292 * | |
293 * @param[in] web_socket A <code>PP_Resource</code> corresponding to a | |
294 * WebSocket. | |
295 * | |
296 * @return Returns a <code>PP_VARTYPE_STRING</code> var. If called before the | |
297 * connection is established, it contains the empty string. Return a | |
298 * <code>PP_VARTYPE_UNDEFINED</code> if called on an invalid resource. | |
299 */ | |
300 PP_Var GetURL([in] PP_Resource web_socket); | |
301 }; | |
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