Can not upload file, getting "'file' is a required property" error

[sinful ridge]

pazhukhjob
15h

Hey there, I try to upload file using REST API but I get the same error over and over.

async function uploadFile() {
const config = {
method: 'POST',
headers: {
'Authorization': Bearer ${apiKey},
'Content-Type': 'multipart/form-data'
},
body : JSON.stringify({
file: fs.createReadStream('content.txt'),
purpose: 'assistants'
})
};

let response = await fetch('https://api.openai.com/v1/files', config);
let result = await response.json();
console.log(result);
}

uploadFile();

Error below

{
error: {
message: "'file' is a required property",
type: 'invalid_request_error',
param: null,
code: null
}
}

According to the documentation 3 request body should has two parameters: file and purpose and that is exactly what I do.

Could someone please point me what I do wrong or give me hint how I can solve it?

[native fossil]

Hi @sinful ridge. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

---

Based on the information provided in the extracts, it seems like you're trying to upload a file to OpenAI's API. However, the error message suggests that the 'file' property is not being recognized in your request.

The issue might be due to the way you're sending the file data in your request. In your current setup, you're stringifying the entire body, which includes the file stream. This could be causing the issue because the file stream might not be correctly converted into a string format that the API can understand.

In the extract from the OpenAI Python API library issue (https://github.com/openai/openai-python/issues/727), the user is uploading a file using the openai.files.create() method, which takes a file object and a purpose as parameters. The file object is created using the open() function with the file path and the 'rb' (read binary) mode. This suggests that the file data should be sent as a binary stream, not as a string.

Unfortunately, the extracts do not provide a direct solution or example code for your specific issue in JavaScript. However, you might want to try sending the file data as a binary stream without stringifying it. You could also consider using a library or package that supports sending multipart/form-data in a POST request, as this is the content type you're specifying in your headers.

Remember to always check the official OpenAI documentation or seek help from the OpenAI community for more accurate and detailed information.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

@sinful ridge kapa.ai is still learning and improving, please let us know how it did by reacting below

[sinful ridge]

@native fossil isn't 'Content-Type': 'multipart/form-data' wrong?

[native fossil]

Let me check the knowledge base for you. One moment! :books:

---

Based on the information provided in the extracts, it's not clear whether the 'Content-Type': 'multipart/form-data' is incorrect. The 'multipart/form-data' content type is typically used when sending binary data in the body of a request, such as a file.

However, in the extract from the OpenAI Python API library issue (https://github.com/openai/openai-python/issues/333), the user is sending a POST request with 'Content-Type': 'multipart/form-data' in the headers, and they're appending the file data to a FormData object. This suggests that 'multipart/form-data' could be the correct content type for uploading a file.

That being said, the exact requirements might depend on the specific API endpoint you're using. It's always a good idea to check the official OpenAI API documentation for the correct usage and requirements of each endpoint.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

@sinful ridge kapa.ai is still learning and improving, please let us know how it did by reacting below

[sinful ridge]

@native fossil check the API docs maybe perhaps

[native fossil]

Let me check the knowledge base for you. One moment! :books:

---

I'm sorry for any confusion, but as an AI model, I don't have real-time access to the internet or external databases, including the OpenAI API documentation. The information I provide is based on the training data I was trained on. For the most accurate and up-to-date information, please refer to the official OpenAI API documentation (https://platform.openai.com/docs/).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

@sinful ridge kapa.ai is still learning and improving, please let us know how it did by reacting below

[sinful ridge]

@native fossil The issue you're encountering is related to how the file data is being included in the request body. When using multipart/form-data for file uploads, the body of the request should not be a JSON string. Instead, it should be a FormData object that contains the file stream and other fields.

In your current code, you're using JSON.stringify which is not suitable for multipart/form-data. This is likely why the server is not recognizing the 'file' field in your request.

Here's how you can modify your function to correctly upload the file:

async function uploadFile() {
  const formData = new FormData();
  formData.append('file', fs.createReadStream('content.txt'));
  formData.append('purpose', 'assistants');

  const config = {
    method: 'POST',
    headers: { 
      'Authorization': `Bearer ${apiKey}`
      // Do not set 'Content-Type' here. Let the browser set it.
    },
    body : formData
  };

  let response = await fetch('https://api.openai.com/v1/files', config);
  let result = await response.json();
  console.log(result);
}

uploadFile();

Key Changes:

1. Removed 'Content-Type': 'multipart/form-data' from headers. When using FormData, the browser will automatically set the correct Content-Type header including the boundary.
2. Replaced JSON.stringify with FormData. This correctly formats the request body for file uploads.

This should resolve the error you are facing.

[native fossil]

Let me check the knowledge base for you. One moment! :books:

---

The issue you're encountering is related to how the file data is being included in the request body. When using multipart/form-data for file uploads, the body of the request should not be a JSON string. Instead, it should be a FormData object that contains the file stream and other fields.

In your current code, you're using JSON.stringify which is not suitable for multipart/form-data. This is likely why the server is not recognizing the 'file' field in your request.

Here's how you can modify your function to correctly upload the file:

async function uploadFile() {
  const formData = new FormData();
  formData.append('file', fs.createReadStream('content.txt'));
  formData.append('purpose', 'assistants');

  const config = {
    method: 'POST',
    headers: { 
      'Authorization': `Bearer ${apiKey}`
      // Do not set 'Content-Type' here. Let the browser set it.
    },
    body : formData
  };

  let response = await fetch('<https://api.openai.com/v1/files',> config);
  let result = await response.json();
  console.log(result);
}

uploadFile();

Key Changes:

1. Removed 'Content-Type': 'multipart/form-data' from headers. When using FormData, the browser will automatically set the correct Content-Type header including the boundary.
2. Replaced JSON.stringify with FormData. This correctly formats the request body for file uploads.

This should resolve the error you are facing.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: