openai-assistants-mcp
Version:
OpenAI Assistants MCP Server - A Model Context Protocol server providing OpenAI Assistants API tools and resources. Features comprehensive assistant management, thread operations, message handling, and run execution with seamless stdio transport for Claud
84 lines • 2.89 kB
JavaScript
/**
* Base Prompt Handler - Abstract class for MCP prompt handlers
*
* This class provides the foundation for handling MCP prompts protocol requests.
* Unlike tool handlers, prompt handlers deal with prompts/list and prompts/get methods.
*/
import { MCPError, ErrorCodes } from '../../types/index.js';
/**
* Abstract base class for prompt handlers
*/
export class BasePromptHandler {
context;
constructor(context) {
this.context = context;
}
/**
* Template method that orchestrates validation and execution
*/
async handle(params) {
try {
// Step 1: Validate input parameters
const validationResult = this.validate(params);
if (!validationResult.isValid) {
throw validationResult.error;
}
// Step 2: Execute the prompt operation
const result = await this.execute(params);
// Step 3: Return successful result
return result;
}
catch (error) {
// Centralized error handling
this.logError(error, params);
throw error;
}
}
/**
* Centralized error logging
*/
logError(error, params) {
const errorInfo = {
method: this.getMethodName(),
requestId: this.context.requestId,
error: error instanceof Error ? error.message : 'Unknown error',
params: this.sanitizeParamsForLogging(params),
timestamp: new Date().toISOString()
};
console.error('[PromptHandler Error]', errorInfo);
}
/**
* Sanitize parameters for logging (remove sensitive data)
*/
sanitizeParamsForLogging(params) {
if (!params || typeof params !== 'object') {
return params;
}
const sanitized = { ...params };
// Remove or mask sensitive fields
const sensitiveFields = ['api_key', 'token', 'password', 'secret'];
for (const field of sensitiveFields) {
if (sanitized[field]) {
sanitized[field] = '[REDACTED]';
}
}
return sanitized;
}
/**
* Helper method to create validation errors
*/
createValidationError(message, paramName) {
const fullMessage = paramName
? `[${this.getMethodName()}] Parameter '${paramName}': ${message}`
: `[${this.getMethodName()}] ${message}`;
return new MCPError(ErrorCodes.INVALID_PARAMS, fullMessage);
}
/**
* Helper method to create execution errors
*/
createExecutionError(message, originalError) {
const fullMessage = `[${this.getMethodName()}] Execution failed: ${message}`;
return new MCPError(ErrorCodes.INTERNAL_ERROR, fullMessage, originalError ? { originalError } : undefined);
}
}
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