Mcp-Swagger-Server

import { Injectable, Logger } from '@nestjs/common'; import { parseFromString, ValidationError, ValidationWarning } from 'mcp-swagger-parser'; // Keep local interface for backward compatibility export interface LocalValidationResult { valid: boolean; errors: string[]; warnings: string[]; } @Injectable() export class ValidatorService { private readonly logger = new Logger(ValidatorService.name); async validateSpecification(spec: any): Promise<LocalValidationResult> { try { this.logger.log('Starting OpenAPI specification validation'); // Use mcp-swagger-parser's parseFromString functionality (consistent with server package) const dataString = typeof spec === 'string' ? spec : JSON.stringify(spec); const parseResult = await parseFromString(dataString, { strictMode: false, resolveReferences: true, validateSchema: true }); this.logger.log(`OpenAPI validation completed: ${parseResult.validation.valid ? 'valid' : 'invalid'} with ${parseResult.validation.errors.length} errors and ${parseResult.validation.warnings.length} warnings`); // Convert ValidationError[] and ValidationWarning[] to string[] for compatibility return { valid: parseResult.validation.valid, errors: parseResult.validation.errors.map((err: ValidationError) => err.message), warnings: parseResult.validation.warnings.map((warn: ValidationWarning) => warn.message) }; } catch (error) { this.logger.error(`Error during OpenAPI validation: ${error.message}`, error.stack); return { valid: false, errors: [`Validation error: ${error.message}`], warnings: [] }; } } /** * Legacy validation method for backward compatibility */ async validateSpecificationLegacy(spec: any): Promise<LocalValidationResult> { const result = await this.validateSpecification(spec); return { valid: result.valid, errors: result.errors, warnings: result.warnings }; } }