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1 | <?php | |
2 | include "../inc/common.php"; | |
3 | ||
4 | if(session_status() !== PHP_SESSION_ACTIVE) session_start(); | |
5 | ||
6 | if (!isset($_SESSION['id'])) | |
7 | die("Access denied"); | |
8 | ||
9 | // Close the session now, otherwise other pages block | |
10 | session_write_close(); | |
11 | ||
12 | // Only now make the connection (this can take a short while) | |
13 | include "../inc/connection.php"; | |
14 | ||
15 | // Server Side Events | |
16 | header('Content-Type: text/event-stream'); | |
17 | ||
18 | // Explicitly disable caching so Varnish and other upstreams won't cache. | |
19 | header("Cache-Control: no-cache, must-revalidate"); | |
20 | ||
21 | // Setting this header instructs Nginx to disable fastcgi_buffering and disable | |
22 | // gzip for this request. | |
23 | header('X-Accel-Buffering: no'); | |
24 | ||
25 | // No time limit | |
26 | set_time_limit(0); | |
27 | ||
28 | // Send content immediately | |
29 | ob_implicit_flush(1); | |
30 | ||
31 | // Eh.. yeah... | |
32 | ob_end_flush(); | |
33 | ||
34 | // If we use fastcgi, then finish the request now (UNTESTED) | |
35 | if (function_exists('fastcgi_finish_request')) | |
36 | fastcgi_finish_request(); | |
37 | ||
38 | /* Send server-sent events (SSE) message */ | |
39 | function send_sse($json) | |
40 | { | |
41 | echo "data: ".json_encode($json)."\n\n"; | |
42 | } | |
43 | ||
44 | function api_log_loop($sources) | |
45 | { | |
46 | GLOBAL $rpc; | |
47 | ||
48 | $rpc->log()->subscribe($sources); | |
49 | if ($rpc->error) | |
50 | { | |
51 | echo $rpc->error; | |
52 | die; | |
53 | } | |
54 | ||
55 | for(;;) | |
56 | { | |
57 | $res = $rpc->eventloop(); | |
58 | if (!$res) | |
59 | { | |
60 | /* Output at least something every timeout (10) seconds, | |
61 | * otherwise PHP may not | |
62 | * notice when the webclient is gone. | |
63 | */ | |
64 | echo "\n"; | |
65 | continue; | |
66 | } | |
67 | send_sse($res); | |
68 | } | |
69 | } | |
70 | ||
71 | function api_timer_loop(int $every_msec, string $method, array|null $params = null) | |
72 | { | |
73 | GLOBAL $rpc; | |
74 | ||
75 | $rpc->rpc()->add_timer("timer", $every_msec, $method, $params); | |
76 | if ($rpc->error) | |
77 | { | |
78 | /* Have to resort to old style: client-side timer */ | |
79 | while(1) | |
80 | { | |
81 | $res = $rpc->query($method, $params); | |
82 | if (!$res) | |
83 | die; | |
84 | send_sse($res); | |
85 | usleep($every_msec * 1000); | |
86 | } | |
87 | } | |
88 | ||
89 | /* New style: use server-side timers */ | |
90 | for(;;) | |
91 | { | |
92 | $res = $rpc->eventloop(); | |
93 | if (!$res) | |
94 | { | |
95 | /* Output at least something every timeout (10) seconds, | |
96 | * otherwise PHP may not | |
97 | * notice when the webclient is gone. | |
98 | */ | |
99 | echo "\n"; | |
100 | continue; | |
101 | } | |
102 | send_sse($res); | |
103 | } | |
104 | } |