英文:
Nodejs: Uploading a stream to form-data results in 411 'Length-required'
问题
我正在尝试将文件上传到Storyblock API。这在幕后使用S3。本地文件上传可行，但尝试从外部URL获取文件时出现411错误。
这段代码可行：
import { createReadStream } from 'fs'
import FormData from 'form-data'
const form = new FormData()
form.append('file', createReadStream('./local-file.jpg))
form.submit(...)
但是，尝试对同一文件使用外部URL时不行：
import FormData from 'form-data'
import got, { type Got } from 'got'
const form = new FormData()
form.append('file', got.stream(externalUrl, {decompress: false})
form.submit(...)
响应：
statusCode: 411,
statusMessage: 'Length Required',
这表明，一些原因使得 got.stream() 输出的流与 createReadStream() 不同。
英文:
I'm trying to upload a file to the storyblock API. This uses S3 behind the scenes. Local file uploads work, but when trying to fetch a file from an external URL I get a 411 error.
This works:
import { createReadStream } from 'fs'
import FormData from 'form-data'
const form = new FormData()
form.append('file', createReadStream('./local-file.jpg))
form.submit(...)
But when trying an external URL for the same file it doesn't:
import FormData from 'form-data'
import got, { type Got } from 'got'
const form = new FormData()
form.append('file', got.stream(externalUrl, {decompress: false})
form.submit(...)
Response:
statusCode: 411,
statusMessage: 'Length Required',
Which indicates that somehow got.stream() gives a different stream output than createReadStream()
答案1
得分: 1
Content-Length 头部缺失，这就是为什么会返回 411。需要确定要上传的文件大小，然后在请求中包括 Content-Length 头部。在提交之前添加以下代码：
// 获取文件大小
const { headers } = await got.head(externalUrl);
const contentLength = headers['content-length'];
// 使用正确的内容长度将文件附加到表单中
form.append('file', stream, { knownLength: contentLength });
英文:
Content-Length header is missing that is why it's giving you 411. The size of file being uploaded needs be determined and then include the Content-Length header in the request. Add this before submit.
// Get the file size
const { headers } = await got.head(externalUrl);
const contentLength = headers['content-length'];
// Append the file to the form with the correct content length
form.append('file', stream, { knownLength: contentLength });
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