initial commit
This commit is contained in:
peter
@@ -0,0 +1,75 @@
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import { parseSubResponse, parseResponse } from "frontblock-generic/Service";
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var bsock = require('bsock')
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/**
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* Dynamic library to communicate with FrontblockService remotely
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*
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* This will be automatically injected into the webpages served by FrontblockService
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* Will ask it's service for available RPCs and parse them into methods of this object
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* for convenient access.
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*/
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export class FrontblockConfigLib{
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private socket
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constructor(){
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this.socket = bsock.connect(20000, 'localhost', false/*tls*/)
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this.init()
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}
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// need this-context for eval-magic below
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// DO NOT REMOVE. They're not really unused
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private parseSubResponse = parseSubResponse
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private parseResponse = parseResponse
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private async init(){
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const info = await this.info()
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for (const i of info) {
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let f: any
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switch (i.info.type) {
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case 'call':
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f = this.callGenerator(i.name, i.args)
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break
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case 'hook':
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f = this.hookGenerator(i.name, i.args)
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break
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case 'unhook':
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f = this.unhookGenerator(i.name, i.args)
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break
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}
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this[i.name] = f
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this[i.name].bind(this)
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}
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}
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async info(){
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return await this.socket.call('info')
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}
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private callGenerator(fnName, fnArgs): Function{
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return eval( '( () => async ('+fnArgs+') => { return await this.socket.call("'+fnName+'", '+fnArgs+')} )()' )
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}
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private hookGenerator(fnName, fnArgs): Function{
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return eval( `( () => async (`+fnArgs+(fnArgs.length!==0?",":"")+` callback) => {
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const r = await this.socket.call("`+fnName+`", `+fnArgs+`)
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const res = await this.parseSubResponse(r);
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if(res.uid != null){
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this.socket.hook(res.uid, callback)
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}
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return res
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} )()` )
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}
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private unhookGenerator(fnName, fnArgs): Function{
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return eval( `( () => async (`+fnArgs+`) => {
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const r = await this.socket.call("`+fnName+`", `+fnArgs+`)
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const res = await this.parseResponse(r)
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if(res.uid != null)
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this.socket.unhook(res.uid)
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return res
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} )()` )
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}
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}
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window['fb'] = new FrontblockConfigLib()
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@@ -0,0 +1,222 @@
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'use strict'
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import * as Logger from 'log4js'
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import { Plugin, socketioRPC } from 'frontblock-generic/Plugin';
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import { ErrorResponse, SuccessResponse } from 'frontblock-generic/Service';
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const pluginList = [
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'../../paymentmanager/static/Plugin',
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'frontblock/FrontblockLib'
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]
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const express = require('express')
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const http = require('http')
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const bsock = require('bsock')
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const kfs = require("key-file-storage")('conf') //'conf' is a directory that will be generated if it doesn't exist
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const logger = Logger.getLogger() // logs to STDOUT
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logger.level = 'debug'
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type hookRpc = { type: 'hook', generator: (socket) => Function, unhook:(uid:string)=>Promise<ErrorResponse|SuccessResponse>}
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type unhookRPC = { type: 'unhook', fn: Function}
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type callRPC = { type: 'call', fn: Function}
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export type rpcInfo = {
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name: string,
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args: string,
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info: hookRpc | unhookRPC | callRPC
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}
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/**
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* FrontblockAdmin
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*
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* The customer-facing dynamic component of the customer backend
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* Supports (un)loading plugins which will be communicated to its library component (See FrontblockLib.ts and the info() RPC)
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*
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* The list of available plugins is published via the frontblock API and downloaded via gitea-releases
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*/
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export class FrontblockAdmin{
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private plugins: Plugin[]
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private express
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private httpServer
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private io = bsock.createServer()
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private wsServer = http.createServer()
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constructor(){
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if(!('FrontblockService' in kfs)){
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logger.warn('No config file found! Generating one')
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kfs.FrontblockService = { httpPort: 8080 }
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}
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this.initialize()
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}
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private async initialize(){
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await this.loadPlugins()
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this.plugins.forEach(plugin => plugin.start())
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this.startWebsocket()
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this.startWebserver()
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}
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private async loadPlugins(){
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const promises = pluginList.map(path => {
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return import(path)
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})
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const pluginsClasses = await Promise.all(promises)
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this.plugins = pluginsClasses.map(clazz => new clazz.default())
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}
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private initApis(socket){
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const rpcInfos:rpcInfo[] = [
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{
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name: 'restartWebserver',
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args: 'port',
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info:{
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type:'call',
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fn: (port:number) => { this.restartWebserver(port) }
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}
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},{
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name: 'info',
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args: '',
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info:{
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type:'call',
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fn: () => { return rpcInfos }
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}
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}
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]
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this.plugins.forEach(plugin => {
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plugin.exportRPCs().forEach(rpc => rpcInfos.push(this.rpcToRpcInfo(rpc)))
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})
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for(const api of rpcInfos){
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switch(api.info.type){
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case 'call':
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socket.hook(api.name, api.info.fn)
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break
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case 'hook':
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const hook = api.info.generator(socket)
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hook.bind(this)
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socket.hook(api.name, hook)
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break
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case 'unhook':
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socket.hook(api.name, api.info.fn)
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break
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}
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}
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socket.on('close', () => {
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logger.info("Client disconnected")
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rpcInfos.forEach(rpc => {
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socket.unhook(rpc.name)
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})
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})
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}
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private startWebserver(){
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if(this.httpServer != null || this.express != null){
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logger.warn("Webserver is already running")
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return
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}
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let port:number = kfs.FrontblockService.httpPort
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this.express = express()
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this.express.use(express.static('static'))
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this.httpServer = http.Server(this.express)
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this.httpServer.listen(port, () => {
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logger.info('listening on *'+port)
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})
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}
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private stopWebserver(){
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if(this.httpServer == null || this.express == null){
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logger.warn("Webserver is not running")
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return
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}
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this.httpServer.close()
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this.httpServer = null
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this.express = null
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logger.info("Webserver stopped")
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}
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private restartWebserver(port:number){
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this.stopWebserver()
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kfs.FrontblockService = { httpPort: port }
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this.startWebserver()
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}
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private startWebsocket(){
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try{
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this.io.attach(this.wsServer)
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this.io.on('socket', (socket) => {
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logger.info("New Websocket connection on port", socket.port)
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const handleError = (e: any) => {
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logger.info("Websocket closing", String(e))
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socket.close()
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}
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socket.on('error', handleError)
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this.initApis(socket)
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})
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logger.info('websocket listening on *20000')
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this.wsServer.listen(20000)
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}catch(e){
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logger.error(String(e))
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}
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}
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private rpcToRpcInfo(rpc:socketioRPC):rpcInfo{
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switch(rpc.type){
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case 'hook':
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let f = this.hookGenerator(rpc)
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return {name: rpc.name, args: this.extractArgs(f(null)), info: { type: 'hook', generator: f, unhook: rpc.unhook } }
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case 'unhook':
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return {name: rpc.name, args: this.extractArgs(rpc.rpc), info: { type: 'unhook', fn: rpc.rpc } }
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case 'call':
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return {name: rpc.name, args: this.extractArgs(rpc.rpc), info: { type: 'call', fn: rpc.rpc } }
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}
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}
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/**
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* Generates RPC hooks which support a callback.
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*
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* Note callbacks *need* to accept a singular argument and they have to be the last parameter!
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*
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* TODO: Maybe kill open callbacks when socket closes? See rpc.info.unhook for the appropriate function to call.
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*/
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hookGenerator = (rpc) => {
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const argsArr = this.extractArgs(rpc.rpc).split(',')
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argsArr.pop()
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const args = argsArr.join(',')
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return eval(`(socket) => async (`+args+`) => {
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const res = await rpc.rpc(`+args+(args.length!==0?',':'')+` (x) => {
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if(res.uid != null){
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console.log("calling "+res.uid)
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socket.call(res.uid, x).catch(e => {
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rpc.unhook(res.uid)
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})
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}
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})
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return res
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}`)
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}
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private extractArgs(f:Function):string{
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let fn = String(f)
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let args = fn.substr(0, fn.indexOf(")"))
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args = args.substr(fn.indexOf("(")+1)
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return args
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}
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}
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(async() => {
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new FrontblockAdmin()
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})()
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@@ -0,0 +1,4 @@
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import { Greeter } from '../index';
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test('My Greeter', () => {
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expect(Greeter('Carl')).toBe('Hello Carl');
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});
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Reference in New Issue
Block a user