"Failed to fetch localhost manifest" error even though I can manually pull it up

GPT builders Plugins / Actions builders
10

The method mentioned above was fine until we had to register the plugin, but some modifications to the header were necessary when the plugin was executed.

  • Header
    • ‘Access-Control-Allow-Credentials’: ‘false’,
    • ‘Access-Control-Allow-Headers’: ‘Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id’,
    • ‘Cache-Control’: ‘no-store, max-age=0’,

Final Code

const http = require('http');
const fs = require('fs');
const path = require('path');

const mimeTypes = {
    '.html': 'text/html',
    '.js': 'text/javascript',
    '.css': 'text/css',
    '.json': 'application/json',
    '.png': 'image/png',
    '.jpg': 'image/jpeg',
    '.gif': 'image/gif'
};

const server = http.createServer((req, res) => {

    const filePath = `.${req.url}`;
    const extname = String(path.extname(filePath)).toLowerCase();

    const contentType = mimeTypes[extname] || 'application/octet-stream';

    console.log(req.url)

    // Preflight request. Reply successfully:
    if (req.method === 'OPTIONS') {
        res.writeHead(200, {
            'Access-Control-Allow-Origin': 'https://chat.openai.com',
            'Access-Control-Allow-Methods': 'GET, POST',
            'Access-Control-Allow-Headers': 'Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id',
            'Access-Control-Allow-Credentials': 'false',
            'Cache-Control': 'no-store, max-age=0',
        });
        res.end();
        return;
    }

    
    if (fs.existsSync(filePath)) {

        // ファイルを読み込んでJSONとして解析します
        fs.readFile(filePath, (err, data) => {
            if (err) {
                // エラーが発生した場合は404 Not Foundを返します
                res.writeHead(404, {
                    'Access-Control-Allow-Origin': 'https://chat.openai.com',
                    'Access-Control-Allow-Credentials': 'false',
                    'Access-Control-Allow-Headers': 'Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id',
                    'Cache-Control': 'no-store, max-age=0',
                });
                res.end();
            } else {
                // JSONを返します
                res.writeHead(200, {
                    'Content-Type': contentType,
                    'Access-Control-Allow-Origin': 'https://chat.openai.com',
                    'Access-Control-Allow-Credentials': 'false',
                    'Access-Control-Allow-Headers': 'Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id',
                    'Cache-Control': 'no-store, max-age=0',
                });
                res.end(data);
            }
        });

    } else {

        // その他のリクエストには404 Not Foundを返します
        res.writeHead(404, {
            'Content-Type': 'text/html',
            'Access-Control-Allow-Origin': 'https://chat.openai.com',
            'Access-Control-Allow-Credentials': 'false',
            'Access-Control-Allow-Headers': 'Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id',
            'Cache-Control': 'no-store, max-age=0',
        });
        res.end("404 Not Found");
    }
});

const port = 3333;
server.listen(port, () => {
    console.log(`Server running at http://localhost:${port}/`);
});

To call the TODO, add the following code:

if ("/todos" === req.url) {

        console.log("OK")

        // JSONを返します
        res.writeHead(200, {
            'Content-Type': "application/json",
            'Access-Control-Allow-Origin': 'https://chat.openai.com',
            'Access-Control-Allow-Credentials': 'false',
            'Access-Control-Allow-Headers': 'Content-Type, Authorization, openai-conversation-id, openai-ephemeral-user-id',
            'Cache-Control': 'no-store, max-age=0',
        });
        res.end(JSON.stringify({
            todos: [
                "any task..."
            ]
        }));
        return;
    }

    if (fs.existsSync(filePath)) {
...