Node.js: create a txt file without writing to the device

user_15113647 0
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I have a problem. In my project I get a text and send this text to remote API in .txt file. Now the program does this: getting a text, saving a text in a .txt file in filesystem, uploading a .txt file to remote API. Unfortunately, remote API accepts only files, I can't send plain text in request.

//get the wallPost with the field text
fs.writeFileSync(`./tmp/${wallPostId}.txt`, wallPost.text)

remoteAPI.uploadFileFromStorage(
  `${wallPostPath}/${wallPostId}.txt`,
  `./tmp/${wallPostId}.txt`
)

UPD: In function uploadFileFromStorage, I made a PUT request to remote api with writing a file. Remote API is API of cloud storage which can save only files.

const uploadFileFromStorage = (path, filePath) =>{
let pathEncoded = encodeURIComponent(path)
const requestUrl = `https://cloud-api.yandex.net/v1/disk/resources/upload?&path=%2F${pathEncoded}`
const options = {
  headers: headers
}

axios.get(requestUrl, options)

.then((response) => {
  const uploadUrl = response.data.href
  const headersUpload = {
    'Content-Type': 'text/plain',
    'Accept': 'application/json',
    'Authorization': `${auth_type} ${access_token}`
  }
  const uploadOptions = {
    headers: headersUpload
  }
  axios.put(
    uploadUrl,
    fs.createReadStream(filePath),
    uploadOptions
  ).then(response =>
    console.log('uploadingFile: data  '+response.status+" "+response.statusText)
  ).catch((error) =>
    console.log('error uploadFileFromStorage '+ +error.status+" "+error.statusText)
  )
})

But i guess in the future such a process will be slow. I want to create and upload a .txt file in RAM memory (without writing on drive). Thanks for your time.

yandex-api fs node.js javascript
1 Answers

You're using the Yandex Disk API, which expects files because that's what it's for: it explicitly stores files on a remote disk.

So, if you look at that code, the part that supplies the file content is supplied via fs.createReadStream(filePath), which is a Stream. The function doesn't care what builds that stream, it just cares that it is a stream, so build your own from your in-memory data:

const { Readable } = require("stream");

...

const streamContent = [wallPost.text];
const pretendFileStream = Readable.from(streamContent);

...

axios.put(
  uploadUrl,
  pretendFileStream,
  uploadOptions
).then(response =>
  console.log('uploadingFile: data  '+response.status+" "+response.statusText)
)

Although I don't see anything in your code that tells the Yandex Disk API what the filename is supposed to be, but I'm sure that's just because you edited the post for brevity.

user_7405530
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