添加SSE订阅字段过滤参数

src/main/modules/openApi/index.ts

@@ -1,4 +1,5 @@
 import http from 'node:http'
+import querystring from 'node:querystring'
 import type { Socket } from 'node:net'
 
 let status: LX.OpenAPI.Status = {
@@ -7,14 +8,42 @@ let status: LX.OpenAPI.Status = {
   address: '',
 }
 
+type SubscribeKeys = keyof LX.Player.Status
+
 let httpServer: http.Server
 let sockets = new Set<Socket>()
-let responses = new Set<http.ServerResponse<http.IncomingMessage>>()
+let responses = new Map<http.ServerResponse<http.IncomingMessage>, SubscribeKeys[]>()
+
+const parseFilter = (filter: any) => {
+  const keys = Object.keys(global.lx.player_status) as SubscribeKeys[]
+  if (typeof filter != 'string') return keys
+  filter = filter.split(',')
+  const subKeys = keys.filter(k => filter.includes(k))
+  return subKeys.length ? subKeys : keys
+}
+const handleSubscribePlayerStatus = (req: http.IncomingMessage, res: http.ServerResponse<http.IncomingMessage>, query?: string) => {
+  res.writeHead(200, {
+    'Content-Type': 'text/event-stream',
+    Connection: 'keep-alive',
+    'Cache-Control': 'no-cache',
+  })
+  req.socket.setTimeout(0)
+  req.on('close', () => {
+    res.end('OK')
+    responses.delete(res)
+  })
+  const keys = parseFilter(querystring.parse(query ?? '').filter)
+  responses.set(res, keys)
+  for (const [k, v] of Object.entries(global.lx.player_status)) {
+    if (!keys.includes(k as SubscribeKeys)) continue
+    res.write(`event: ${k}\n`)
+    res.write(`data: ${JSON.stringify(v)}\n\n`)
+  }
+}
 
 const handleStartServer = async(port = 9000, ip = '127.0.0.1') => new Promise<void>((resolve, reject) => {
-  httpServer = http.createServer((req, res) => {
-    // console.log(req.url)
-    const endUrl = `/${req.url?.split('/').at(-1) ?? ''}`
+  httpServer = http.createServer((req, res): void => {
+    const [endUrl, query] = `/${req.url?.split('/').at(-1) ?? ''}`.split('?')
     let code
     let msg
     switch (endUrl) {
@@ -83,22 +112,15 @@ const handleStartServer = async(port = 9000, ip = '127.0.0.1') => new Promise<vo
         msg = global.lx.player_status.lyric
         break
       case '/subscribe-player-status':
-        res.writeHead(200, {
-          'Content-Type': 'text/event-stream',
-          Connection: 'keep-alive',
-          'Cache-Control': 'no-cache',
-        })
-        req.socket.setTimeout(0)
-        req.on('close', () => {
-          res.end('OK')
-          responses.delete(res)
-        })
-        for (const [k, v] of Object.entries(global.lx.player_status)) {
-          res.write(`event: ${k}\n`)
-          res.write(`data: ${JSON.stringify(v)}\n\n`)
+        try {
+          handleSubscribePlayerStatus(req, res, query)
+          return
+        } catch (err) {
+          console.log(err)
+          code = 500
+          msg = 'Error'
         }
-        responses.add(res)
-        return
+        break
       default:
         code = 401
         msg = 'Forbidden'
@@ -149,8 +171,9 @@ const handleStopServer = async() => new Promise<void>((resolve, reject) => {
 
 const sendStatus = (status: Partial<LX.Player.Status>) => {
   if (!responses.size) return
-  for (const [k, v] of Object.entries(status)) {
-    for (const resp of responses) {
+  for (const [resp, keys] of responses) {
+    for (const [k, v] of Object.entries(status)) {
+      if (!keys.includes(k as SubscribeKeys)) continue
       resp.write(`event: ${k}\n`)
       resp.write(`data: ${JSON.stringify(v)}\n\n`)
     }