fs

问题 I am getting data from a get request. The data (in the body of the response) looks something like this: ... ÿÀ���"�ÿÄ��������������ÿÄ�N��!1"AQa2q¡#BR±ð3brS²ÁÂÑá$ñCDTst¢³&45dÃÒÿÄ������������ÿÄ�-������!1A"Qa¡ðq±ÁÑ2áÿÚ���?�û." """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """ """R1º#ª¥7Jíî½M6îNö ]·!]=Fv­ß`7~qÆee²%·JokkZüCbìþ<ù{ã9öùË®´(%A,Ià�2I?t×bn6wÆù¥V 2SÀ><k5ºÙØ92EhÎçü¨/aÝ!ã|ñþ¥ñßT}U«¦ÒÚµ«xuÕfƳ KØ {ù{ð$·DúBMZÆcp}´R|Mä2ó8üg)·ùôfõ$zXiRÞü}óÆ>,êÚûíR5ý:\

问题 How to reset nodejs stream? How to read stream again in nodejs? Thanks in advance! var fs = require('fs'); var lineReader = require('line-reader'); // proxy.txt = only 3 lines var readStream = fs.createReadStream('proxy.txt'); lineReader.open(readStream, function (err, reader) { for(var i=0; i<6; i++) { reader.nextLine(function(err, line) { if(err) { readStream.reset(); // ??? } else { console.log(line); } }); } }); 回答1: There are two ways of solving your problem, as someone commented before

问题 How to reset nodejs stream? How to read stream again in nodejs? Thanks in advance! var fs = require('fs'); var lineReader = require('line-reader'); // proxy.txt = only 3 lines var readStream = fs.createReadStream('proxy.txt'); lineReader.open(readStream, function (err, reader) { for(var i=0; i<6; i++) { reader.nextLine(function(err, line) { if(err) { readStream.reset(); // ??? } else { console.log(line); } }); } }); 回答1: There are two ways of solving your problem, as someone commented before

问题 I want to create a simple Log System, which prints a line before the past line into a txt file by using Node.js, but i dont know how the File System from Node.js works. Can someone explain it ? 回答1: Inserting data into the middle of a text file is not a simple task. If possible, you should append it to the end of your file. The easiest way to append data some text file is to use build-in fs.appendFile(filename, data[, options], callback) function from fs module: var fs = require('fs') fs

问题 I want to create a simple Log System, which prints a line before the past line into a txt file by using Node.js, but i dont know how the File System from Node.js works. Can someone explain it ? 回答1: Inserting data into the middle of a text file is not a simple task. If possible, you should append it to the end of your file. The easiest way to append data some text file is to use build-in fs.appendFile(filename, data[, options], callback) function from fs module: var fs = require('fs') fs

问题 I have tried this code to send response zip in header, but something is missing from my side. In this I am getting response as shown in screenshot Here is my code.. const zipPath - './test.zip'; // I have a zip with 2 files inside it (password protected) const stat = fs.statSync(zipPath); res.setHeader('Content-Disposition', 'attachment; filename=devices.zip'); res.setHeader('Content-Type', 'application/octet-stream'); res.setHeader('Content-Length', stat.size); res.writeHead(200, { 'Content

问题 I have been trying to write a NodeJS script that downloads a PDF file then attaches it in an email. The attachment that comes in the email is blank and says it can't be open. I have tried to follow the directions offered here request-promise download pdf file, but I still can't seem to get the right PDF to attach correctly. I have confirmed the pdfurl is valid and the file is not corrupt. This is what I have..Any help is much appreaciated var pdfpath = "/tmp/test.pdf"; const options = { uri:

问题 I am attempting to make a file explorer using the 'fs' module of Node.js. I wrote the following function which takes in a path and stores the contents of that path(files/folders) in an array and just sends it back using the callback. listDir: function (path, myCallback) { var resultObj = []; fs.readdir(path, function (err, data) { console.log('In listDir'); if (err) { return myCallback(err, null); } else { data.forEach(function (value) { fs.lstat(path + '/' + value, function (err, stats) { if

问题 I am trying to upload chunks of base64 to node js server and save those chunks into one file let chunks = []; app.post('/api', (req, res) => { let {blob} = req.body; //converting chunks of base64 to buffer chunks.push(Buffer.from(blob, 'base64')); res.json({gotit:true}) }); app.post('/finish', (req, res) => { let buf = Buffer.concat(chunks); fs.writeFile('finalvideo.webm', buf, (err) => { console.log('Ahh....', err) }); console.log('SAVED') res.json({save:true}) }); Problem with the above

问题 I tried to use Node.js to process a 500MB Apache log file, converting its syntax from ip.ip.ip.ip - - [02/Aug/2012:05:01:17 -0600] "GET /path/of/access/ HTTP/1.1" 302 26 to ip.ip.ip.ip - - 02/Aug/2012:05:01:17 GET /path/of/access/ HTTP/1.1 302 26 , then write to another text file. For better memory control and performance, I used fs.createReadStream and fs.createWriteStream , but only managed to write the first line into output.txt , because the script ends with an error: { [Error: EBADF,