up.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>File Upload Test</title>
</head>
<body>
    <h1>Upload a File</h1>
    <form id="uploadForm" enctype="multipart/form-data" method="post">
        <label for="file">Choose a file:</label>
        <input type="file" id="file" name="file" required>
        <button type="submit">Upload</button>
    </form>
    <p id="responseMessage"></p>

    <script>
        document.getElementById('uploadForm').addEventListener('submit', async (event) => {
            event.preventDefault();

            const formData = new FormData();
            const fileInput = document.getElementById('file');
            formData.append('file', fileInput.files[0]);

            try {
                const response = await fetch('http://localhost:3000/upload', {
                    method: 'POST',
                    body: formData
                });

                const result = await response.json();
                if (response.ok) {
                    document.getElementById('responseMessage').textContent = `File uploaded successfully! Hash: ${result.hash}`;
                } else {
                    document.getElementById('responseMessage').textContent = `Error: ${result.message}`;
                }
            } catch (error) {
                document.getElementById('responseMessage').textContent = `Error: ${error.message}`;
            }
        });
    </script>
</body>
</html>