[英]How to download a file with chai-http?
Here is my problem: I have to test a route which enriches files and makes them downloadable.这是我的问题:我必须测试一个丰富文件并使它们可下载的路由。 The problem I have is that I cannot get the enriched file during my test.我遇到的问题是我在测试期间无法获得丰富的文件。
I manage to recover this file with Axios (for a terminal command) but I have to use chai-http for the tests.我设法使用 Axios (用于终端命令)恢复此文件,但我必须使用 chai-http 进行测试。
router.js路由器.js
const router = require('express').Router();
const path = require('path');
const { enrichmentFileJSON } = require('../services/enrich/json');
router.post('/enrich/json', async (req, res) => {
let { args } = req.query;
await enrichmentFileJSON(req, args);
return res.status(200).download(path.resolve(tmpDir, 'enriched.jsonl'));
});
testEnrichment.js testEnrichment.js
const chai = require('chai');
const chaiHttp = require('chai-http');
const fs = require('fs-extra');
const path = require('path');
chai.should();
chai.use(chaiHttp);
const url = 'http://localhost:8080';
describe('/enrich/json enrich a jsonl file', () => {
it('should return the enriched file', async () => {
const response = await chai.request(url)
.post('/enrich/json')
.attach('fileField', path.resolve(__dirname, 'enrichment', 'file.jsonl'), 'file.jsonl')
.set('Access-Control-Allow-Origin', '*')
.set('Content-Type', 'multipart/form-data')
// i want to use something like this
const writer = fs.createWriteStream(path.resolve(__dirname, 'tmp', 'enriched.jsonl'));
response.data.pipe(writer);
});
});
Thank you in advance !先感谢您 !
For "chai-http": "^4.3.0"
, Call .buffer()
and .parse()
methods on response
object to get the buffer of the downloaded file.对于"chai-http": "^4.3.0"
,在response
object 上调用.buffer()
和.parse()
方法来获取下载文件的缓冲区。
Then, use Readable.from(buffer)
of stream
module to convert the buffer to a readable stream.然后,使用stream
模块的Readable.from(buffer)
将缓冲区转换为可读的 stream。
Eg例如
index.js
: index.js
:
const express = require('express');
const multer = require('multer');
const path = require('path');
const app = express();
var upload = multer({ dest: path.resolve(__dirname, 'uploads/') });
app.post('/enrich/json', upload.single('fileField'), async (req, res) => {
return res.status(200).download(path.resolve(__dirname, 'file.jsonl'));
});
module.exports = app;
index.test.js
: index.test.js
:
const chai = require('chai');
const chaiHttp = require('chai-http');
const fs = require('fs');
const path = require('path');
const { Readable } = require('stream');
const app = require('./');
chai.use(chaiHttp);
const binaryParser = function (res, cb) {
res.setEncoding('binary');
res.data = '';
res.on('data', function (chunk) {
res.data += chunk;
});
res.on('end', function () {
cb(null, Buffer.from(res.data, 'binary'));
});
};
describe('66245355', () => {
it('should pass', async () => {
const response = await chai
.request(app)
.post('/enrich/json')
.attach('fileField', path.resolve(__dirname, 'file.jsonl'), 'file.jsonl')
.set('Content-Type', 'multipart/form-data')
.buffer()
.parse(binaryParser);
const writer = fs.createWriteStream(path.resolve(__dirname, 'enriched.jsonl'));
Readable.from(response.body.toString()).pipe(writer);
});
});
file.jsonl
, the file you try to upload: file.jsonl
,您尝试上传的文件:
{
'ok': true
}
enriched.jsonl
, the file you enriched and downloaded: enriched.jsonl
的.jsonl ,您丰富和下载的文件:
{
'ok': true
}
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