Encoding MCP Server

Instructions

Implementation Reference

• encoding_mcp/file_operations.py:253-321 (handler)

  Core handler function that executes the file encoding conversion: validates inputs, detects current encoding, optionally creates backup, reads file content, rewrites with target encoding, handles errors and provides detailed result message.
  def convert_file_encoding(file_path: str, target_encoding: str, backup: bool = False) -> str: """ Convert file encoding. Args: file_path: File path target_encoding: Target encoding backup: Whether to create backup Returns: str: Result message """ try: # Check if file exists if not os.path.exists(file_path): return f"File not found: {file_path}" # Validate encoding if not validate_encoding(target_encoding): supported = ", ".join(SUPPORTED_ENCODINGS.keys()) return f"Unsupported encoding: {target_encoding}. Supported: {supported}" # Detect current encoding (using separate module) from .encoding_detector import detect_file_encoding current_info = detect_file_encoding(file_path) if "error" in current_info: return f"Failed to detect file encoding: {current_info['error']}" current_encoding = current_info['encoding'] # Already in target encoding if current_encoding == target_encoding: return f"File is already in {target_encoding} encoding: {file_path}" # Create backup backup_path = None if backup: backup_path = file_path + ".backup" try: shutil.copy2(file_path, backup_path) except Exception as e: return f"Backup creation failed: {str(e)}" # Read file content content, read_result = read_file_with_encoding(file_path, current_encoding) if not content and "successfully" not in read_result.lower(): return f"File read failed: {read_result}" # Save with new encoding write_result = write_file_with_content(file_path, content, target_encoding) if "successfully" not in write_result.lower(): # Restore backup on failure if backup_path and os.path.exists(backup_path): shutil.copy2(backup_path, file_path) return f"File write failed: {write_result}" backup_msg = f"\nBackup file: {backup_path}" if backup_path else "\nNo backup" current_info_obj = get_encoding_info(current_encoding) target_info_obj = get_encoding_info(target_encoding) current_name = current_info_obj['name'] if current_info_obj else current_encoding target_name = target_info_obj['name'] if target_info_obj else target_encoding return f"File encoding conversion completed!\nConversion: {current_name} → {target_name}{backup_msg}" except Exception as e: return f"Error during file conversion: {str(e)}"
• encoding_mcp/server.py:179-207 (schema)

  JSON schema definition for the tool input parameters including file_name, directory_path, target_encoding (enum), and optional backup boolean.
  Tool( name="convert_file_encoding", description="Convert file to specified encoding. Automatic backup support.", inputSchema={ "type": "object", "properties": { "file_name": { "type": "string", "description": "File name to convert (e.g., hello.cpp, test.h)" }, "directory_path": { "type": "string", "description": "Absolute path of directory containing the file" }, "target_encoding": { "type": "string", "description": "Target encoding", "enum": ["utf-8-bom", "utf-8", "cp949", "euc-kr", "ascii"], "default": "utf-8-bom" }, "backup": { "type": "boolean", "description": "Whether to backup original file", "default": False } }, "required": ["file_name", "directory_path"] } ),
• encoding_mcp/server.py:274-298 (registration)

  MCP server tool dispatcher: extracts arguments, constructs full file path, invokes the convert_file_encoding handler, formats response with icon and result message.
  elif name == "convert_file_encoding": file_name = arguments.get("file_name", "") directory_path = arguments.get("directory_path", "") target_encoding = arguments.get("target_encoding", "utf-8-bom") backup = arguments.get("backup", False) # Combine file name and directory path file_path = os.path.join(directory_path, file_name) result = convert_file_encoding(file_path, target_encoding, backup) # Select icon based on result if "completed" in result.lower() or "complete" in result.lower(): icon = "✅" elif "failed" in result.lower() or "error" in result.lower(): icon = "❌" else: icon = "ℹ️" return [ types.TextContent( type="text", text=f"{icon} Encoding conversion\n\n{result}" ) ]
• encoding_mcp/server.py:126-217 (registration)

  Server decorator and function that lists all available tools, including the convert_file_encoding tool registration via Tool object.
  @app.list_tools() async def list_tools(): """Return list of available tools.""" return [ Tool( name="create_empty_file", description="Create an empty file with specified encoding. Creates only an empty file so Agent can fill in content.", inputSchema={ "type": "object", "properties": { "file_name": { "type": "string", "description": "File name to create (e.g., hello.cpp, test.h)" }, "directory_path": { "type": "string", "description": "Absolute path of directory to create file in" }, "encoding": { "type": "string", "description": "File encoding", "enum": ["utf-8-bom", "utf-8", "cp949", "euc-kr", "ascii"], "default": "utf-8-bom" } }, "required": ["file_name", "directory_path"] } ), Tool( name="detect_file_encoding", description="Accurately detect file encoding using professional libraries.", inputSchema={ "type": "object", "properties": { "file_name": { "type": "string", "description": "File name to check (e.g., hello.cpp, test.h)" }, "directory_path": { "type": "string", "description": "Absolute path of directory containing the file" }, "max_bytes": { "type": "integer", "description": "Maximum bytes to analyze (default: 8192)", "default": 8192, "minimum": 512, "maximum": 65536 } }, "required": ["file_name", "directory_path"] } ), Tool( name="convert_file_encoding", description="Convert file to specified encoding. Automatic backup support.", inputSchema={ "type": "object", "properties": { "file_name": { "type": "string", "description": "File name to convert (e.g., hello.cpp, test.h)" }, "directory_path": { "type": "string", "description": "Absolute path of directory containing the file" }, "target_encoding": { "type": "string", "description": "Target encoding", "enum": ["utf-8-bom", "utf-8", "cp949", "euc-kr", "ascii"], "default": "utf-8-bom" }, "backup": { "type": "boolean", "description": "Whether to backup original file", "default": False } }, "required": ["file_name", "directory_path"] } ), Tool( name="get_system_info", description="Check Encoding MCP system information. Shows available libraries and supported encodings.", inputSchema={ "type": "object", "properties": {}, "required": [] } ) ]