repl.it
@MrEconomical/

repl-chat-database-source

Nodejs

code for the database

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Files
  • index.js
  • data
  • config.js
  • config.json
  • methods.js
  • util.js
  • Packager files
  • package-lock.json
  • package.json
index.js
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// Files

console.log("Importing files...")
const config = require("./config.js").config
const util = require("./util.js")
const methods = require("./methods.js")

// Startup

util.log("Starting repl chat database...")

// Modules

util.log("Importing modules...")
const http = require("http")

// HTTP server

const server = http.createServer((req, res) => {
    // Access-Control-Allow-Origin

    if (req.headers.origin) {
        res.setHeader("Access-Control-Allow-Origin", req.headers.origin)
    } else {
        res.setHeader("Access-Control-Allow-Origin", "*")
    }

    // Handle requests

    if (req.method == "GET") {
        // Generic response

        res.writeHead(200)
        res.write("repl chat database")
        res.end()
    } else if (req.method == "POST") {
        // Check origin

        if ((req.headers.origin && check_origin(req.headers.origin)) || (req.headers["repl-chat-key"] && req.headers["repl-chat-key"] == config.replChatKey)) {
            // Collect data

            let data = ""
            req.on("data", chunk => {
                data += chunk.toString()
                if (data.length > config.reqByteLimit) {
                    // Request too large

                    res.writeHead(400)
                    res.write("ERROR: REQUEST TOO LARGE")
                    res.end()
                }
            })

            // Data collected

            req.on("end", () => {
                // Parse data

                const request = data.substr(0, data.indexOf("|"))
                const content = data.substr(data.indexOf("|") + 1)

                // Check origin and repl-chat-key for auth requests

                if (request == "auth") {
                    if (req.origin || !req.headers["repl-chat-key"] || req.headers["repl-chat-key"] != config.replChatKey) {
                        // Invalid request

                        res.writeHead(403)
                        res.write("REJECTED: INVALID")
                        res.end()
                        
                        return
                    }
                }

                // Process data

                if (request && content) {
                    methods.process_req(request, content).then(result => {
                        // Send response

                        res.writeHead(200)
                        res.write(result)
                        res.end()
                    }).catch(error => {
                        // Internal error

                        res.writeHead(500)
                        res.write("ERROR: INTERNAL ERROR")
                        res.end()

                        // Log error

                        util.log(`ERROR: ${error}`, true)
                    })
                } else {
                    // Invalid data

                    res.writeHead(400)
                    res.write("ERROR: INVALID REQUEST DATA")
                    res.end()
                }
            })
        } else {
            // Invalid

            res.writeHead(403)
            res.write("REJECTED: INVALID")
            res.end()
        }
    } else {
        // Invalid request type

        res.writeHead(400)
        res.write("ERROR: INVALID REQUEST TYPE")
        res.end()
    }
}).listen(config.port)

function check_origin(origin) {
    // Check request origin

    for (let o = 0; o < config.origins.length; o ++) {
        if (origin.startsWith(config.origins[o])) {
            return true
        }
    }

    return false
}

server.on("listening", () => {
    util.log(`HTTP server listening on port ${config.port}`)
})

// Sessions update interval

setInterval(() => {
    methods.update_sessions()
}, config.sessionInterval)
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