111
This commit is contained in:
zhangzheng
413
WebApp/src/class/httphandler.ts
Normal file
413
WebApp/src/class/httphandler.ts
Normal file
@@ -0,0 +1,413 @@
|
||||
import { Request, Response } from 'express';
|
||||
import Offer from './offer';
|
||||
import Answer from './answer';
|
||||
import Candidate from './candidate';
|
||||
import { v4 as uuid } from 'uuid';
|
||||
|
||||
class Disconnection {
|
||||
id: string;
|
||||
datetime: number;
|
||||
constructor(id: string, datetime: number) {
|
||||
this.id = id;
|
||||
this.datetime = datetime;
|
||||
}
|
||||
}
|
||||
|
||||
const TimeoutRequestedTime = 10000; // 10sec
|
||||
|
||||
let isPrivate: boolean;
|
||||
|
||||
// [{sessonId:[connectionId,...]}]
|
||||
const clients: Map<string, Set<string>> = new Map<string, Set<string>>();
|
||||
|
||||
// [{sessonId:Date}]
|
||||
const lastRequestedTime: Map<string, number> = new Map<string, number>();
|
||||
|
||||
// [{connectionId:[sessionId1, sessionId2]}]
|
||||
const connectionPair: Map<string, [string, string]> = new Map<string, [string, string]>(); // key = connectionId
|
||||
|
||||
// [{sessionId:[{connectionId:Offer},...]}]
|
||||
const offers: Map<string, Map<string, Offer>> = new Map<string, Map<string, Offer>>(); // key = sessionId
|
||||
|
||||
// [{sessionId:[{connectionId:Answer},...]}]
|
||||
const answers: Map<string, Map<string, Answer>> = new Map<string, Map<string, Answer>>(); // key = sessionId
|
||||
|
||||
// [{sessionId:[{connectionId:Candidate},...]}]
|
||||
const candidates: Map<string, Map<string, Candidate[]>> = new Map<string, Map<string, Candidate[]>>(); // key = sessionId
|
||||
|
||||
// [{sessionId:[Disconnection,...]}]
|
||||
const disconnections: Map<string, Disconnection[]> = new Map<string, Disconnection[]>(); // key = sessionId
|
||||
|
||||
function getOrCreateConnectionIds(sessionId: string): Set<string> {
|
||||
let connectionIds = null;
|
||||
if (!clients.has(sessionId)) {
|
||||
connectionIds = new Set<string>();
|
||||
clients.set(sessionId, connectionIds);
|
||||
}
|
||||
connectionIds = clients.get(sessionId);
|
||||
return connectionIds;
|
||||
}
|
||||
|
||||
function reset(mode: string): void {
|
||||
isPrivate = mode == "private";
|
||||
clients.clear();
|
||||
connectionPair.clear();
|
||||
offers.clear();
|
||||
answers.clear();
|
||||
candidates.clear();
|
||||
disconnections.clear();
|
||||
}
|
||||
|
||||
function checkSessionId(req: Request, res: Response, next): void {
|
||||
if (req.url === '/') {
|
||||
next();
|
||||
return;
|
||||
}
|
||||
const id: string = req.header('session-id');
|
||||
if (!clients.has(id)) {
|
||||
res.sendStatus(404);
|
||||
return;
|
||||
}
|
||||
lastRequestedTime.set(id, Date.now());
|
||||
next();
|
||||
}
|
||||
|
||||
function _deleteConnection(sessionId:string, connectionId:string, datetime:number) {
|
||||
clients.get(sessionId).delete(connectionId);
|
||||
|
||||
if(isPrivate) {
|
||||
if (connectionPair.has(connectionId)) {
|
||||
const pair = connectionPair.get(connectionId);
|
||||
const otherSessionId = pair[0] == sessionId ? pair[1] : pair[0];
|
||||
if (otherSessionId) {
|
||||
if (clients.has(otherSessionId)) {
|
||||
clients.get(otherSessionId).delete(connectionId);
|
||||
const array1 = disconnections.get(otherSessionId);
|
||||
array1.push(new Disconnection(connectionId, datetime));
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
disconnections.forEach((array, id) => {
|
||||
if (id == sessionId)
|
||||
return;
|
||||
array.push(new Disconnection(connectionId, datetime));
|
||||
});
|
||||
}
|
||||
|
||||
connectionPair.delete(connectionId);
|
||||
offers.get(sessionId).delete(connectionId);
|
||||
answers.get(sessionId).delete(connectionId);
|
||||
candidates.get(sessionId).delete(connectionId);
|
||||
|
||||
const array2 = disconnections.get(sessionId);
|
||||
array2.push(new Disconnection(connectionId, datetime));
|
||||
}
|
||||
|
||||
function _deleteSession(sessionId: string) {
|
||||
if(clients.has(sessionId)) {
|
||||
for(const connectionId of Array.from(clients.get(sessionId))) {
|
||||
_deleteConnection(sessionId, connectionId, Date.now());
|
||||
}
|
||||
}
|
||||
offers.delete(sessionId);
|
||||
answers.delete(sessionId);
|
||||
candidates.delete(sessionId);
|
||||
clients.delete(sessionId);
|
||||
disconnections.delete(sessionId);
|
||||
}
|
||||
|
||||
function _checkForTimedOutSessions(): void {
|
||||
for (const sessionId of Array.from(clients.keys()))
|
||||
{
|
||||
if(!lastRequestedTime.has(sessionId))
|
||||
continue;
|
||||
if(lastRequestedTime.get(sessionId) > Date.now() - TimeoutRequestedTime)
|
||||
continue;
|
||||
_deleteSession(sessionId);
|
||||
console.log(`deleted sessionId:${sessionId} by timeout.`);
|
||||
}
|
||||
}
|
||||
|
||||
function _getConnection(sessionId: string): string[] {
|
||||
_checkForTimedOutSessions();
|
||||
return Array.from(clients.get(sessionId));
|
||||
}
|
||||
|
||||
function _getDisconnection(sessionId: string, fromTime: number): Disconnection[] {
|
||||
_checkForTimedOutSessions();
|
||||
let arrayDisconnections: Disconnection[] = [];
|
||||
if (disconnections.size != 0 && disconnections.has(sessionId)) {
|
||||
arrayDisconnections = disconnections.get(sessionId);
|
||||
}
|
||||
|
||||
if (fromTime > 0) {
|
||||
arrayDisconnections = arrayDisconnections.filter((v) => v.datetime >= fromTime);
|
||||
}
|
||||
return arrayDisconnections;
|
||||
}
|
||||
|
||||
function _getOffer(sessionId: string, fromTime: number): [string, Offer][] {
|
||||
let arrayOffers: [string, Offer][] = [];
|
||||
|
||||
if (offers.size != 0) {
|
||||
if (isPrivate) {
|
||||
if (offers.has(sessionId)) {
|
||||
arrayOffers = Array.from(offers.get(sessionId));
|
||||
}
|
||||
} else {
|
||||
const otherSessionMap = Array.from(offers).filter(x => x[0] != sessionId);
|
||||
arrayOffers = [].concat(...Array.from(otherSessionMap, x => Array.from(x[1], y => [y[0], y[1]])));
|
||||
}
|
||||
}
|
||||
|
||||
if (fromTime > 0) {
|
||||
arrayOffers = arrayOffers.filter((v) => v[1].datetime >= fromTime);
|
||||
}
|
||||
return arrayOffers;
|
||||
}
|
||||
|
||||
function _getAnswer(sessionId: string, fromTime: number): [string, Answer][] {
|
||||
let arrayAnswers: [string, Answer][] = [];
|
||||
|
||||
if (answers.size != 0 && answers.has(sessionId)) {
|
||||
arrayAnswers = Array.from(answers.get(sessionId));
|
||||
}
|
||||
|
||||
if (fromTime > 0) {
|
||||
arrayAnswers = arrayAnswers.filter((v) => v[1].datetime >= fromTime);
|
||||
}
|
||||
return arrayAnswers;
|
||||
}
|
||||
|
||||
function _getCandidate(sessionId: string, fromTime: number): [string, Candidate][] {
|
||||
const connectionIds = Array.from(clients.get(sessionId));
|
||||
const arr: [string, Candidate][] = [];
|
||||
for (const connectionId of connectionIds) {
|
||||
const pair = connectionPair.get(connectionId);
|
||||
if (pair == null) {
|
||||
continue;
|
||||
}
|
||||
const otherSessionId = sessionId === pair[0] ? pair[1] : pair[0];
|
||||
if (!candidates.get(otherSessionId) || !candidates.get(otherSessionId).get(connectionId)) {
|
||||
continue;
|
||||
}
|
||||
const arrayCandidates = candidates.get(otherSessionId).get(connectionId)
|
||||
.filter((v) => v.datetime >= fromTime);
|
||||
if (arrayCandidates.length === 0) {
|
||||
continue;
|
||||
}
|
||||
for (const candidate of arrayCandidates) {
|
||||
arr.push([connectionId, candidate]);
|
||||
}
|
||||
}
|
||||
return arr;
|
||||
}
|
||||
|
||||
function getAnswer(req: Request, res: Response): void {
|
||||
// get `fromtime` parameter from request query
|
||||
const fromTime: number = req.query.fromtime ? Number(req.query.fromtime) : 0;
|
||||
const sessionId: string = req.header('session-id');
|
||||
const answers: [string, Answer][] = _getAnswer(sessionId, fromTime);
|
||||
res.json({ answers: answers.map((v) => ({ connectionId: v[0], sdp: v[1].sdp, type: "answer", datetime: v[1].datetime })) });
|
||||
}
|
||||
|
||||
function getConnection(req: Request, res: Response): void {
|
||||
// get `fromtime` parameter from request query
|
||||
const sessionId: string = req.header('session-id');
|
||||
const connections = _getConnection(sessionId);
|
||||
res.json({ connections: connections.map((v) => ({ connectionId: v, type: "connect", datetime: Date.now() })) });
|
||||
}
|
||||
|
||||
function getOffer(req: Request, res: Response): void {
|
||||
// get `fromtime` parameter from request query
|
||||
const fromTime: number = req.query.fromtime ? Number(req.query.fromtime) : 0;
|
||||
const sessionId: string = req.header('session-id');
|
||||
const offers = _getOffer(sessionId, fromTime);
|
||||
res.json({ offers: offers.map((v) => ({ connectionId: v[0], sdp: v[1].sdp, polite: v[1].polite, type: "offer", datetime: v[1].datetime })) });
|
||||
}
|
||||
|
||||
function getCandidate(req: Request, res: Response): void {
|
||||
// get `fromtime` parameter from request query
|
||||
const fromTime: number = req.query.fromtime ? Number(req.query.fromtime) : 0;
|
||||
const sessionId: string = req.header('session-id');
|
||||
const candidates = _getCandidate(sessionId, fromTime);
|
||||
res.json({ candidates: candidates.map((v) => ({ connectionId: v[0], candidate: v[1].candidate, sdpMLineIndex: v[1].sdpMLineIndex, sdpMid: v[1].sdpMid, type: "candidate", datetime: v[1].datetime })) });
|
||||
}
|
||||
|
||||
function getAll(req: Request, res: Response): void {
|
||||
const fromTime: number = req.query.fromtime ? Number(req.query.fromtime) : 0;
|
||||
const sessionId: string = req.header('session-id');
|
||||
const connections = _getConnection(sessionId);
|
||||
const offers = _getOffer(sessionId, fromTime);
|
||||
const answers: [string, Answer][] = _getAnswer(sessionId, fromTime);
|
||||
const candidates: [string, Candidate][] = _getCandidate(sessionId, fromTime);
|
||||
const disconnections: Disconnection[] = _getDisconnection(sessionId, fromTime);
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
|
||||
let array: any[] = [];
|
||||
|
||||
array = array.concat(connections.map((v) => ({ connectionId: v, type: "connect", datetime: datetime })));
|
||||
array = array.concat(offers.map((v) => ({ connectionId: v[0], sdp: v[1].sdp, polite: v[1].polite, type: "offer", datetime: v[1].datetime })));
|
||||
array = array.concat(answers.map((v) => ({ connectionId: v[0], sdp: v[1].sdp, type: "answer", datetime: v[1].datetime })));
|
||||
array = array.concat(candidates.map((v) => ({ connectionId: v[0], candidate: v[1].candidate, sdpMLineIndex: v[1].sdpMLineIndex, sdpMid: v[1].sdpMid, type: "candidate", datetime: v[1].datetime })));
|
||||
array = array.concat(disconnections.map((v) => ({ connectionId: v.id, type: "disconnect", datetime: v.datetime })));
|
||||
|
||||
array.sort((a, b) => a.datetime - b.datetime);
|
||||
res.json({ messages: array, datetime: datetime });
|
||||
}
|
||||
|
||||
function createSession(sessionId: string, res: Response): void;
|
||||
function createSession(req: Request, res: Response): void;
|
||||
|
||||
function createSession(req: string | Request, res: Response): void {
|
||||
const sessionId: string = typeof req === "string" ? req : uuid();
|
||||
clients.set(sessionId, new Set<string>());
|
||||
offers.set(sessionId, new Map<string, Offer>());
|
||||
answers.set(sessionId, new Map<string, Answer>());
|
||||
candidates.set(sessionId, new Map<string, Candidate[]>());
|
||||
disconnections.set(sessionId, []);
|
||||
res.json({ sessionId: sessionId });
|
||||
}
|
||||
|
||||
function deleteSession(req: Request, res: Response): void {
|
||||
const id: string = req.header('session-id');
|
||||
_deleteSession(id);
|
||||
res.sendStatus(200);
|
||||
}
|
||||
|
||||
function createConnection(req: Request, res: Response): void {
|
||||
const sessionId: string = req.header('session-id');
|
||||
const { connectionId } = req.body;
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
|
||||
if (connectionId == null) {
|
||||
res.status(400).send({ error: new Error(`connectionId is required`) });
|
||||
return;
|
||||
}
|
||||
let polite = true;
|
||||
if (isPrivate) {
|
||||
if (connectionPair.has(connectionId)) {
|
||||
const pair = connectionPair.get(connectionId);
|
||||
|
||||
if (pair[0] != null && pair[1] != null) {
|
||||
const err = new Error(`${connectionId}: This connection id is already used.`);
|
||||
console.log(err);
|
||||
res.status(400).send({ error: err });
|
||||
return;
|
||||
} else if (pair[0] != null) {
|
||||
connectionPair.set(connectionId, [pair[0], sessionId]);
|
||||
const map = getOrCreateConnectionIds(pair[0]);
|
||||
map.add(connectionId);
|
||||
}
|
||||
} else {
|
||||
connectionPair.set(connectionId, [sessionId, null]);
|
||||
polite = false;
|
||||
}
|
||||
}
|
||||
|
||||
const connectionIds = getOrCreateConnectionIds(sessionId);
|
||||
connectionIds.add(connectionId);
|
||||
res.json({ connectionId: connectionId, polite: polite, type: "connect", datetime: datetime });
|
||||
}
|
||||
|
||||
function deleteConnection(req: Request, res: Response): void {
|
||||
const sessionId: string = req.header('session-id');
|
||||
const { connectionId } = req.body;
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
|
||||
_deleteConnection(sessionId, connectionId, datetime);
|
||||
|
||||
res.json({ connectionId: connectionId });
|
||||
}
|
||||
|
||||
function postOffer(req: Request, res: Response): void {
|
||||
const sessionId: string = req.header('session-id');
|
||||
const { connectionId } = req.body;
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
let keySessionId = null;
|
||||
let polite = false;
|
||||
|
||||
if (isPrivate) {
|
||||
if (connectionPair.has(connectionId)) {
|
||||
const pair = connectionPair.get(connectionId);
|
||||
keySessionId = pair[0] == sessionId ? pair[1] : pair[0];
|
||||
if (keySessionId != null) {
|
||||
polite = true;
|
||||
const map = offers.get(keySessionId);
|
||||
map.set(connectionId, new Offer(req.body.sdp, datetime, polite));
|
||||
}
|
||||
}
|
||||
res.sendStatus(200);
|
||||
return;
|
||||
}
|
||||
|
||||
if(!connectionPair.has(connectionId))
|
||||
{
|
||||
connectionPair.set(connectionId, [sessionId, null]);
|
||||
}
|
||||
|
||||
keySessionId = sessionId;
|
||||
const map = offers.get(keySessionId);
|
||||
map.set(connectionId, new Offer(req.body.sdp, datetime, polite));
|
||||
|
||||
res.sendStatus(200);
|
||||
}
|
||||
|
||||
function postAnswer(req: Request, res: Response): void {
|
||||
const sessionId: string = req.header('session-id');
|
||||
const { connectionId } = req.body;
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
const connectionIds = getOrCreateConnectionIds(sessionId);
|
||||
connectionIds.add(connectionId);
|
||||
|
||||
if (!connectionPair.has(connectionId)) {
|
||||
res.sendStatus(200);
|
||||
return;
|
||||
}
|
||||
|
||||
// add connectionPair
|
||||
const pair = connectionPair.get(connectionId);
|
||||
const otherSessionId = pair[0] == sessionId ? pair[1] : pair[0];
|
||||
if (!clients.has(otherSessionId)) {
|
||||
// already deleted
|
||||
res.sendStatus(200);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!isPrivate) {
|
||||
connectionPair.set(connectionId, [otherSessionId, sessionId]);
|
||||
}
|
||||
|
||||
const map = answers.get(otherSessionId);
|
||||
map.set(connectionId, new Answer(req.body.sdp, datetime));
|
||||
|
||||
// update datetime for candidates
|
||||
const mapCandidates = candidates.get(otherSessionId);
|
||||
if (mapCandidates) {
|
||||
const arrayCandidates = mapCandidates.get(connectionId);
|
||||
if (arrayCandidates) {
|
||||
for (const candidate of arrayCandidates) {
|
||||
candidate.datetime = datetime;
|
||||
}
|
||||
}
|
||||
}
|
||||
res.sendStatus(200);
|
||||
}
|
||||
|
||||
function postCandidate(req: Request, res: Response): void {
|
||||
const sessionId: string = req.header('session-id');
|
||||
const { connectionId } = req.body;
|
||||
const datetime = lastRequestedTime.get(sessionId);
|
||||
|
||||
const map = candidates.get(sessionId);
|
||||
if (!map.has(connectionId)) {
|
||||
map.set(connectionId, []);
|
||||
}
|
||||
const arr = map.get(connectionId);
|
||||
const candidate = new Candidate(req.body.candidate, req.body.sdpMLineIndex, req.body.sdpMid, datetime);
|
||||
arr.push(candidate);
|
||||
res.sendStatus(200);
|
||||
}
|
||||
|
||||
export { reset, checkSessionId, getAll, getConnection, getOffer, getAnswer, getCandidate, createSession, deleteSession, createConnection, deleteConnection, postOffer, postAnswer, postCandidate };
|
||||
Reference in New Issue
Block a user