File size: 2,622 Bytes
a2c64e7 | 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 | 'use strict';
// Node-only: relies on the built-in `http2` module. Browser/react-native
// builds replace `lib/adapters/http.js` (the sole importer) with `lib/helpers/null.js`
// via the `browser` package.json field, so this module is never reached in
// those environments. Do not import it from any browser-reachable code path.
import http2 from 'http2';
import util from 'util';
class Http2Sessions {
constructor() {
this.sessions = Object.create(null);
}
getSession(authority, options) {
options = Object.assign(
{
sessionTimeout: 1000,
},
options
);
let authoritySessions = this.sessions[authority];
if (authoritySessions) {
let len = authoritySessions.length;
for (let i = 0; i < len; i++) {
const [sessionHandle, sessionOptions] = authoritySessions[i];
if (
!sessionHandle.destroyed &&
!sessionHandle.closed &&
util.isDeepStrictEqual(sessionOptions, options)
) {
return sessionHandle;
}
}
}
const session = http2.connect(authority, options);
let removed;
let timer;
const removeSession = () => {
if (removed) {
return;
}
removed = true;
if (timer) {
clearTimeout(timer);
timer = null;
}
let entries = authoritySessions,
len = entries.length,
i = len;
while (i--) {
if (entries[i][0] === session) {
if (len === 1) {
delete this.sessions[authority];
} else {
entries.splice(i, 1);
}
if (!session.closed) {
session.close();
}
return;
}
}
};
const originalRequestFn = session.request;
const { sessionTimeout } = options;
if (sessionTimeout != null) {
let streamsCount = 0;
session.request = function () {
const stream = originalRequestFn.apply(this, arguments);
streamsCount++;
if (timer) {
clearTimeout(timer);
timer = null;
}
stream.once('close', () => {
if (!--streamsCount) {
timer = setTimeout(() => {
timer = null;
removeSession();
}, sessionTimeout);
}
});
return stream;
};
}
session.once('close', removeSession);
let entry = [session, options];
authoritySessions
? authoritySessions.push(entry)
: (authoritySessions = this.sessions[authority] = [entry]);
return session;
}
}
export default Http2Sessions;
|