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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/***************************************************************************
webengine.c
Handle MAME internal web server.
****************************************************************************
Copyright Miodrag Milanovic
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY MIODRAG MILANOVIC ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL MIODRAG MILANOVIC BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#include "emu.h"
#include "emuopts.h"
#include "webengine.h"
#include "web/mongoose.h"
#include "web/json/json.h"
//**************************************************************************
// WEB ENGINE
//**************************************************************************
void web_engine::websocket_ready_handler(struct mg_connection *conn) {
static const char *message = "update_machine";
mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, message, strlen(message));
m_websockets.append(*global_alloc(simple_list_wrapper<mg_connection>(conn)));
}
// Arguments:
// flags: first byte of websocket frame, see websocket RFC,
// http://tools.ietf.org/html/rfc6455, section 5.2
// data, data_len: payload data. Mask, if any, is already applied.
int web_engine::websocket_data_handler(struct mg_connection *conn, int flags,
char *data, size_t data_len)
{
// just Echo example for now
if ((flags & 0x0f) == WEBSOCKET_OPCODE_TEXT)
mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, data, data_len);
// Returning zero means stoping websocket conversation.
// Close the conversation if client has sent us "exit" string.
return memcmp(data, "exit", 4);
}
// This function will be called by mongoose on every new request.
int web_engine::begin_request_handler(struct mg_connection *conn)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
if (!strncmp(request_info->uri, "/json/",6))
{
if (!strcmp(request_info->uri, "/json/game"))
{
Json::Value data;
data["name"] = m_machine->system().name;
data["description"] = m_machine->system().description;
data["year"] = m_machine->system().year;
data["manufacturer"] = m_machine->system().manufacturer;
data["parent"] = m_machine->system().parent;
data["source_file"] = m_machine->system().source_file;
data["flags"] = m_machine->system().flags;
Json::FastWriter writer;
const char *json = writer.write(data).c_str();
// Send HTTP reply to the client
mg_printf(conn,
"HTTP/1.1 200 OK\r\n"
"Content-Type: application/json\r\n"
"Content-Length: %d\r\n" // Always set Content-Length
"\r\n"
"%s",
(int)strlen(json), json);
// Returning non-zero tells mongoose that our function has replied to
// the client, and mongoose should not send client any more data.
return 1;
}
}
if (!strncmp(request_info->uri, "/screenshot.png",15))
{
screen_device_iterator iter(m_machine->root_device());
screen_device *screen = iter.first();
if (screen == NULL)
{
return 0;
}
astring fname("screenshot.png");
emu_file file(m_machine->options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
file_error filerr = file.open(fname);
if (filerr != FILERR_NONE)
{
return 0;
}
m_machine->video().save_snapshot(screen, file);
astring fullpath(file.fullpath());
file.close();
mg_send_file(conn,fullpath);
return 1;
}
return 0;
}
void *web_engine::websocket_keepalive()
{
while(!m_exiting_core)
{
osd_ticks_t curtime = osd_ticks();
if ((curtime - m_lastupdatetime) > osd_ticks_per_second() * 5)
{
m_lastupdatetime = curtime;
for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next())
{
int status = mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_PING, NULL, 0);
if (status==0) m_websockets.detach(*curitem); // remove inactive clients
}
}
osd_sleep(osd_ticks_per_second()/5);
}
return NULL;
}
//-------------------------------------------------
// static callbacks
//-------------------------------------------------
static void websocket_ready_handler_static(struct mg_connection *conn)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
web_engine *engine = static_cast<web_engine *>(request_info->user_data);
engine->websocket_ready_handler(conn);
}
static int websocket_data_handler_static(struct mg_connection *conn, int flags,
char *data, size_t data_len)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
web_engine *engine = static_cast<web_engine *>(request_info->user_data);
return engine->websocket_data_handler(conn, flags, data, data_len);
}
static int begin_request_handler_static(struct mg_connection *conn)
{
const struct mg_request_info *request_info = mg_get_request_info(conn);
web_engine *engine = static_cast<web_engine *>(request_info->user_data);
return engine->begin_request_handler(conn);
}
static void *websocket_keepalive_static(void *thread_func_param)
{
web_engine *engine = static_cast<web_engine *>(thread_func_param);
return engine->websocket_keepalive();
}
//-------------------------------------------------
// web_engine - constructor
//-------------------------------------------------
web_engine::web_engine(emu_options &options)
: m_options(options),
m_machine(NULL),
m_ctx(NULL),
m_lastupdatetime(0),
m_exiting_core(false)
{
struct mg_callbacks callbacks;
// List of options. Last element must be NULL.
const char *web_options[] = {
"listening_ports", options.http_port(),
"document_root", options.http_path(),
NULL
};
// Prepare callbacks structure.
memset(&callbacks, 0, sizeof(callbacks));
callbacks.begin_request = begin_request_handler_static;
callbacks.websocket_ready = websocket_ready_handler_static;
callbacks.websocket_data = websocket_data_handler_static;
// Start the web server.
if (m_options.http()) {
m_ctx = mg_start(&callbacks, this, web_options);
mg_start_thread(websocket_keepalive_static, this);
}
}
//-------------------------------------------------
// ~web_engine - destructor
//-------------------------------------------------
web_engine::~web_engine()
{
if (m_options.http())
close();
}
//-------------------------------------------------
// close - close and cleanup of lua engine
//-------------------------------------------------
void web_engine::close()
{
m_exiting_core = 1;
osd_sleep(osd_ticks_per_second()/5);
for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next())
{
mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_CONNECTION_CLOSE, NULL, 0);
}
// Stop the server.
mg_stop(m_ctx);
}
void web_engine::push_message(const char *message)
{
for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next())
{
int status = mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_TEXT, message, strlen(message));
if (status==0) m_websockets.detach(*curitem); // remove inactive clients
}
}
|