test_mcp_server.js•2.81 kB
// Test MCP server with image analysis
import { promises as fs } from 'fs';
import path from 'path';
// Path to test image
const IMAGE_PATH = process.argv[2] || 'test.png';
// Function to convert image to base64
async function imageToBase64(imagePath) {
try {
// Read the file
const imageBuffer = await fs.readFile(imagePath);
// Determine MIME type based on file extension
const fileExt = path.extname(imagePath).toLowerCase();
let mimeType = 'application/octet-stream';
switch (fileExt) {
case '.png':
mimeType = 'image/png';
break;
case '.jpg':
case '.jpeg':
mimeType = 'image/jpeg';
break;
case '.webp':
mimeType = 'image/webp';
break;
default:
mimeType = 'image/png'; // Default to PNG
}
// Convert to base64 and add the data URI prefix
const base64 = imageBuffer.toString('base64');
return `data:${mimeType};base64,${base64}`;
} catch (error) {
console.error('Error converting image to base64:', error);
throw error;
}
}
// Main function to test the MCP server
async function main() {
try {
console.log(`Converting image: ${IMAGE_PATH}`);
// Check if the image file exists
try {
await fs.access(IMAGE_PATH);
console.log(`Image file exists: ${IMAGE_PATH}`);
} catch (err) {
console.error(`Error: Image file does not exist: ${IMAGE_PATH}`);
return;
}
// Convert the image to base64
const base64Image = await imageToBase64(IMAGE_PATH);
console.log('Image converted to base64 successfully.');
console.log(`Base64 length: ${base64Image.length} characters`);
// Create the request for analyze_image
const analyzeImageRequest = {
jsonrpc: '2.0',
id: '1',
method: 'mcp/call_tool',
params: {
tool: 'mcp_openrouter_analyze_image',
arguments: {
image_path: base64Image,
question: "What's in this image?",
model: 'qwen/qwen2.5-vl-32b-instruct:free'
}
}
};
// Send the request to the MCP server's stdin
console.log('Sending request to MCP server...');
process.stdout.write(JSON.stringify(analyzeImageRequest) + '\n');
// The MCP server will write the response to stdout, which we can read
console.log('Waiting for response...');
// In a real application, you would read from the server's stdout stream
// Here we just wait for input to be processed by the MCP server
console.log('Request sent to MCP server. Check the server logs for the response.');
} catch (error) {
console.error('Error in main function:', error);
}
}
// Run the main function
main().catch(error => {
console.error("Unhandled error in main:", error);
});
