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[英]TypeError [ERR_INVALID_ARG_TYPE]: The "chunk" argument must be of type string or an instance of Buffer or Uint8Array
[英]The "chunk" argument must be of type string or an instance of Buffer
我正在运行以下代码,但失败并出现以下错误。
用于列出 bucker 内所有对象的 AWS 代码
const http = require('http');
const host = '127.0.0.1';
const port = 5000;
const path = require('path')
const url = require('url')
const fs = require('fs')
var AWS = require('aws-sdk');
const laptopDate = JSON.parse(fs.readFileSync(`${__dirname}/data/data.json`, `utf-8`))
AWS.config.update({accessKeyId: '***', secretAccessKey: '***', region: 'ap-south-1'});
s3 = new AWS.S3({apiVersion: '2006-03-01'});
var params = {
Bucket: 'bucket-name'
}
const server = http.createServer(function(req, res){
const path = url.parse(req.url, true).pathname
const id = url.parse(req.url, true).query.id
if (path === 'bucket' || path === '/')
s3.listObjects(params, function (err, data) {
if(err) throw err;
res.writeHead(200, { 'Content-Type': 'text/html' });
//const output = JSON.parse(data)
console.log(data)
res.end(data)
});
});
server.listen(port, host, function(req, res) {
console.log(`Server is listening on ${host} and ${port}`)
第一个 output 是 console.log 会按预期显示所有内容。 但是,将 output 渲染到屏幕的 res.end 失败并出现以下错误。
The "chunk" argument must be of type string or an instance of Buffer. Received an instance of Object
at ServerResponse.end (_http_outgoing.js:752:13)
at Response.<anonymous> (D:\js\Extra\starter\index.js:30:13)
at Request.<anonymous> (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:364:18)
at Request.callListeners (D:\js\Extra\starter\node_modules\aws-sdk\lib\sequential_executor.js:106:20)
at Request.emit (D:\js\Extra\starter\node_modules\aws-sdk\lib\sequential_executor.js:78:10)
at Request.emit (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:683:14)
at Request.transition (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:22:10)
at AcceptorStateMachine.runTo (D:\js\Extra\starter\node_modules\aws-sdk\lib\state_machine.js:14:12)
at D:\js\Extra\starter\node_modules\aws-sdk\lib\state_machine.js:26:10
at Request.<anonymous> (D:\js\Extra\starter\node_modules\aws-sdk\lib\request.js:38:9) {
message: 'The "chunk" argument must be of type string or an instance of Buffer. Received an instance of Object',
code: 'ERR_INVALID_ARG_TYPE',
time: 2020-05-18T08:39:24.916Z
}
删除这个res.writeHead(200, { 'Content-Type': 'text/html' });
而不是res.end(data)
使用res.send(data)
或更好的res.send({ data })
。
编辑我没有注意到你没有使用快递,试试这个:
res.writeHead(200, { 'Content-Type': 'application/json' });
res.write(JSON.stringify(data));
res.end();
万一这可能对某人有所帮助,我使用的数据类型不是String
,确切地说是Number
,所以我将其更改为String
以解决此错误
如果这可能对某人有所帮助,请尝试使用 objectMode 属性。
类似的东西
const t = new Transform({
objectMode: true, // set this one to true
transform(data, _, done) {
//...your code
}
});
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