我是nodejs的新手。需要你的帮助。从nodejs终端,我想下载一个excel文件并将其转换为csv(比如mocha online.js
)。注意:我不想通过浏览器这样做。
下面是我正在下载并转换为csv的脚本。没有错误也没有预期的结果:
online.js
if (typeof require !== 'undefined') XLSX = require('xlsx');
var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
/* set up XMLHttpRequest */
var url = "http://oss.sheetjs.com/js-xlsx/test_files/formula_stress_test_ajax.xlsx";
var xhr = new XMLHttpRequest();
xhr.open("GET", url, true);
xhr.responseType = "arraybuffer";
describe('suite', function () {
it('case', function () {
var arraybuffer = xhr.response;
/* convert data to binary string */
var data = new Uint8Array(arraybuffer);
var arr = new Array();
for (var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");
/* Call XLSX */
var sheetName = 'Database';
var workbook = XLSX.read(bstr, { type: "binary" });
var worksheet = workbook.Sheets[sheetName];
var csv = XLSX.utils.sheet_to_csv(worksheet);
console.log(csv);
xhr.send();
//.... perform validations here using the csv data
});
})}
答案 0 :(得分:0)
我实际上在3个月前遇到了同样的问题:这就是我做的!
我没有找到任何完全符合我想要的nodeJS模块,所以我用in2csv(一个python shell程序)来转换数据; t选项是使用制表作为分隔符
1)步骤1:使用in2csv将xlsx文件转换为csv 此代码获取当前目录中的所有xlsx文件,将它们转换为csv文件并将它们放在另一个目录中
var shelljs = require('shelljs/global')
var dir = pwd().stdout.split('/')
dir = dir[dir.length - 1].replace(/\s/g, '\\ ')
mkdir('../'+ dir + 'CSV')
ls('*.xlsx').forEach(function(file) {
// below are the two lines you need
let string = 'in2csv -t ' + file.replace(/\s/g, '\\ ') + ' > ../'+ dir + 'CSV/' + file.replace('xlsx','csv').replace(/\s/g, '\\ ')
exec(string, {silent:true}, function(code, stdout, stderr){
console.log('new file : ' + file.replace('xlsx','csv'))
if(stderr){
console.log(string)
console.log('Program stderr:', stderr)
}
})
});
步骤2:在nodejs程序中加载数据:
我的剧本很长,但主要的两行是:
const args = fileContent.split('\n')[0].split(',')
const content = fileContent.split('\n').slice(1).map(e => e.split(','))
答案 1 :(得分:0)
我尝试使用此代码,似乎它正常工作,唯一的事情是我花了15分钟试图理解为什么我的开放式办公室不会打开文件,我最终明白他们发送了一个zip文件。 ..这里是完整的代码,http get函数的文档在这里http.get
您可以使用request模块,但它不是原生的,但请求更容易。
享受!
const url = 'http://oss.sheetjs.com/js-xlsx/test_files/formula_stress_test_ajax.xlsx'
const http = require('http')
const fs = require('fs')
http.get(url, (res) => {
debugger
const {
statusCode
} = res;
const contentType = res.headers['content-type'];
console.log(`The type of the file is : ${contentType}`)
let error;
if (statusCode !== 200) {
error = new Error(`Request Failed.\n` +
`Status Code: ${statusCode}`);
}
if (error) {
console.error(error.message);
// consume response data to free up memory
res.resume();
return;
}
res.setEncoding('binary');
let rawData = '';
res.on('data', (chunk) => {
rawData += chunk;
});
res.on('end', () => {
try {
const parsedData = xlsxToCSVFunction(rawData);
// And / Or just put it in a file
fs.writeFileSync('fileName.zip', rawData, 'binary')
// console.log(parsedData);
} catch (e) {
console.error(e.message);
}
});
}).on('error', (e) => {
console.error(`Got error: ${e.message}`);
});
function xlsxToCSVFunction(rawData) {
return rawData //you should return the csv file here whatever your tools are
}
答案 2 :(得分:0)
为了像我这样的求职者的利益...... here is a solution using mocha, request and xlsx
var request = require('request');
var XLSX = require('xlsx');
describe('suite', function () {
it('case', function (done) {
var url = "http://oss.sheetjs.com/js-xlsx/test_files/formula_stress_test_ajax.xlsx";
var options = {
url: url,
headers: {
'Content-Type': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
},
encoding: null
};
request.get(options, function (err, res, body){
var arraybuffer = body;
/* convert data to binary string */
var data = arraybuffer;
//var data = new Uint8Array(arraybuffer);
var arr = new Array();
for (var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");
/* Call XLSX */
var sheetName = 'Database';
var workbook = XLSX.read(bstr, { type: "binary" });
var worksheet = workbook.Sheets[sheetName];
var csv = XLSX.utils.sheet_to_csv(worksheet);
console.log(csv);
done();
});
});
});