Invalid upload file - Githubissues

jiegod commented 1 month ago

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Dify version

0.8.0

Cloud or Self Hosted

Self Hosted (Source)

Steps to reproduce

i use upload api upload file then use file id post chat-message,return Invalid upload file

✔️ Expected Behavior

return success

❌ Actual Behavior

{ "code": "invalid_param", "message": "Invalid upload file", "status": 400 }

dosubot[bot] commented 1 month ago

I found a similar issue and discussions that might be relevant to your problem:

Why this not work - Unsolved ^[1].
I can't upload the image on dify workflow via api - Unsolved ^[2].
知识库上传文件报错 - Unsolved ^[3].
api request error - Closed ^[4].

The error you're encountering, "Invalid upload file," with a 400 status code, is likely due to the create_chat_message method in the ChatClient class sending the file IDs as part of the JSON payload, while the API expects the files to be uploaded as multipart/form-data.

To resolve this, ensure that the files are uploaded correctly using the file_upload method and then use the returned file IDs in the create_chat_message method. Here is an example of how you can do this:

Upload the files using the file_upload method:

<?php

require 'vendor/autoload.php';

use GuzzleHttp\Client;

class DifyClient {
    // ... (existing code)

    public function file_upload($user, $files) {
        $data = ['user' => $user];
        $options = [
            'multipart' => $this->prepareMultipart($data, $files)
        ];

        return $this->file_client->request('POST', 'files/upload', $options);
    }

    protected function prepareMultipart($data, $files) {
        $multipart = [];
        foreach ($data as $key => $value) {
            $multipart[] = [
                'name' => $key,
                'contents' => $value
            ];
        }

        foreach ($files as $file) {
            $multipart[] = [
                'name' => 'file',
                'contents' => fopen($file['tmp_name'], 'r'),
                'filename' => $file['name']
            ];
        }

        return $multipart;
    }
}

class ChatClient extends DifyClient {
    public function create_chat_message($inputs, $query, $user, $response_mode = 'blocking', $conversation_id = null, $files = null) {
        $data = [
            'inputs' => $inputs,
            'query' => $query,
            'user' => $user,
            'response_mode' => $response_mode,
        ];
        if ($conversation_id) {
            $data['conversation_id'] = $conversation_id;
        }
        if ($files) {
            $data['files'] = $files;
        }

        return $this->send_request('POST', 'chat-messages', $data, null, $response_mode === 'streaming');
    }
}

// Usage example
$api_key = 'your_api_key';
$base_url = 'https://api.dify.ai/v1/';
$user = 'your_user_id';
$files = [
    ['tmp_name' => '/path/to/file1.txt', 'name' => 'file1.txt'],
    ['tmp_name' => '/path/to/file2.txt', 'name' => 'file2.txt']
];

$client = new ChatClient($api_key, $base_url);

// Step 1: Upload files
$response = $client->file_upload($user, $files);
$file_ids = json_decode($response->getBody(), true)['file_ids'];

// Step 2: Create chat message with file IDs
$inputs = ['input1' => 'value1'];
$query = 'Your query here';
$response_mode = 'blocking';
$conversation_id = null;

$response = $client->create_chat_message($inputs, $query, $user, $response_mode, $conversation_id, $file_ids);
echo $response->getBody();

Ensure the files being uploaded are of the correct type and format as expected by the Dify API. The supported image formats are png, jpg, jpeg, webp, and gif ^[5]^[6]^[7]^[8].
Set the transfer_method parameter to local_file when using the uploaded file ID in the create_chat_message method. This ensures that the API correctly interprets the file ID as a locally uploaded file ^[9].