const file = event.target.files[0]; const reader = new FileReader(); reader.onload = function (e) { console.log(e.target.result); }; reader.readAsText(file); }); 4、使用 stream API Node.js v10.10+ 引入了基于流的 API,称为 stream API,这种方法允许我们更高效地处理大型文件,因为它可以...
} else { var reader = new FileReader(); reader.readAsDataURL(data); // 转换为base64,可以直接放入a表情href reader.onload = function(e) { // 转换完成,创建一个a标签用于下载 var a = document.createElement('a'); a.download = fileName; a.href = e.target.result; $("body").append(a);...
var EventEmitter = require("events").EventEmitter; var util = require("util"); var fs = require("fs"); function FileReader(fileName) { var _self = this; EventEmitter.call(_self); _self.on("stats", function() { fs.stat(fileName, function(error, stats) { if (!error && stats.isFi...
const hashFile = (file) => { return new Promise((resolve, reject) => { const chunks = Math.ceil(file.size / chunkSize); let currentChunk = 0; const spark = new SparkMD5.ArrayBuffer(); const fileReader = new FileReader(); function loadNext() { const start = currentChunk * chunkSize...
reader =newFileReader(); if(files && files[0]){ reader.onload =function(ev) { $('img').attr('src', ev.target.result); } reader.readAsDataURL(files[0]); } }) }(jQuery)) 服务器端: varexpress = require('express');varrouter =express.Router();varmulter = require('multer');...
functionpreviewFiles(){varpreview=document.querySelector('#preview');varfiles=document.querySelector('input[type=file]').files;functionreadAndPreview(file){// 支持的图片类型(可自定义)if(/\.(jpe?g|png|gif)$/i.test(file.name)){varreader=newFileReader();reader.addEventListener("load",function...
functionbase(blob) {varread =newFileReader() read.readAsDataURL(blob) read.onload=function(x) {console.log(x.target.result)varbody =document.bodyvara =document.createElement('a') a.setAttribute('download','1.pdf') a.setAttribute('href', x.target.result) ...
postFiles:function(){var$self=this;if(this.files.size>50*1024*1024){varfileReader=newFileReader(),spark=newSparkMD5.ArrayBuffer();fileReader.onload=function(e){spark.append(e.target.result);$self.hash=spark.end();window.__hash__=$self.hash;varstored=localStorage.getItem('fileUploadInfos');...
var fileReader = new FileReader(); fileReader.readAsDataURL(audioBlob); fileReader.onloadend = function () { var base64String = fileReader.result; socket.emit("audioStream", base64String); }; madiaRecorder.start(); setTimeout(function () { ...
var reader = new FileReader(); reader.readAsDataURL(document.getElementById("product-img-input").files.item(0)); reader.onload = function () {var productImgBase64 = this.result; $.ajax({url: "/ProductAdd", type: "POST", dataType: 'json', ...