Question

如果我不使用包装代码的以下功能，则发布的代码将起作用：

watcher.on('add', function (path) { 
});

但是如果运行下面的代码。在path.join不是函数的情况下，我确实收到此错误。如所见，我一直想在添加文件后一直在watcher.on内运行代码。添加文件时，代码确实会做出反应，但同样，我总是收到以下错误消息。我是将watcher.on代码设置为错误还是导致错误的原因？

文件C：\ myproject \ instances \ b53pd4574z8pe9x793go \ New Text Document.txt已添加（节点：14360）UnhandledPromiseRejectionWarning：TypeError：path.join不是函数

完整代码：

'use strict';
const ccxt = require('ccxt');
const fs = require('fs');
const path = require('path');
var chokidar = require('chokidar');
var watcher = chokidar.watch('C:/myproject/instances/b53pd4574z8pe9x793go', { ignored: /^\./, persistent: true });


var i;
const exchangename = "binance";
const exchange = new ccxt.binance({
    'enableRateLimit': false
});



watcher.on('add', function (path) {
(async () => {
    console.log('File', path, 'has been added')
    const start = Date.now()


    var orderbookPromises = []
    var symbols = ['ETH/BTC']
    for (i = 0; i < symbols.length; i++) {

        const symbol = symbols[i]
        
        try {
                let tickerProcessing = new Promise(async (resolve) => {
                    const orderbook = await exchange.fetchOrderBook(symbol, 5)

                    const exchangename2 = exchangename + '#' + symbol.replace("/", "")
                    const dumpFile = path.join(__dirname, 'orderbooks', `${exchangename2}Orderbook.txt`)
                await fs.promises.writeFile(dumpFile, JSON.stringify(orderbook))
                resolve()
            })
            orderbookPromises.push(tickerProcessing)

        } catch (e) {
            console.error(e)
        }
    }

    // wait for all of them to execute or fail
    await Promise.all(orderbookPromises)


    const end = Date.now()
    console.log(`Done in ${(end - start) / 1000} seconds`)
    })()
});

TypeError：path.join不是函数

0 个答案: