// json-sanitizer.js
// JSON compliance utility for MCP server responses
// Removes emojis and ensures valid JSON structure for Claude Desktop compatibility
/**
* Sanitizes text content to ensure JSON compliance
* Removes all emoji characters that cause JSON parsing failures in Claude Desktop
* @param {string|object} content - Content to sanitize
* @returns {string} - Sanitized content safe for JSON responses
*/
function sanitizeForJSON(content) {
// For non-string types (objects, arrays, numbers, booleans), return as-is
// They are already JSON-safe and don't need emoji sanitization
if (typeof content !== 'string') {
if (content !== null && typeof content === 'object') {
return content;
}
content = String(content);
}
return content
// Remove emoji characters that break JSON parsing
.replace(/β οΈ|π―|ποΈ|βοΈ|π|π|β
|β|π|π§ |β‘|γβ½ά«βΌγ/g, '')
// Remove extra whitespace from emoji removal
.replace(/\s+/g, ' ')
// Clean up multiple newlines
.replace(/\n\s*\n/g, '\n')
// Trim leading/trailing whitespace
.trim();
}
/**
* Creates MCP-compliant response object with sanitized content
* @param {string} content - Response content
* @param {boolean} isError - Whether this is an error response
* @returns {object} - MCP-compliant response object
*/
function createMCPResponse(content, isError = false) {
const sanitized = sanitizeForJSON(content);
if (isError) {
return {
content: [{
type: "text",
text: `Error: ${sanitized}`
}],
isError: true
};
}
return {
content: [{
type: "text",
text: sanitized
}]
};
}
/**
* Validates that a response object is JSON-compliant
* @param {object} response - Response object to validate
* @returns {boolean} - True if JSON-compliant
*/
function validateJSONResponse(response) {
try {
JSON.stringify(response);
return true;
} catch (error) {
console.error('JSON validation failed:', error.message);
return false;
}
}
export {
sanitizeForJSON,
createMCPResponse,
validateJSONResponse
};
