Simple Document Processing MCP Server

Instructions

Implementation Reference

• src/tools/htmlTools.ts:113-162 (handler)

  Core handler function implementing the html_cleaner tool logic: loads HTML with JSDOM, removes unwanted tags (script, style, etc.) and attributes (onclick, etc.), serializes cleaned HTML, saves to unique filename in output directory.

  export async function cleanHtml(inputPath: string, outputDir: string) {
    try {
      console.error(`Starting HTML cleaning...`);
      console.error(`Input file: ${inputPath}`);
      console.error(`Output directory: ${outputDir}`);
  
      // 確保輸出目錄存在
      try {
        await fs.access(outputDir);
        console.error(`Output directory exists: ${outputDir}`);
      } catch {
        console.error(`Creating output directory: ${outputDir}`);
        await fs.mkdir(outputDir, { recursive: true });
        console.error(`Created output directory: ${outputDir}`);
      }
  
      const uniqueId = generateUniqueId();
      const htmlContent = await fs.readFile(inputPath, "utf-8");
      const dom = new JSDOM(htmlContent);
      const { document } = dom.window;
  
      // 移除不必要的標籤和屬性
      const unwantedTags = ["script", "style", "iframe", "noscript"];
      const unwantedAttrs = ["onclick", "onload", "onerror", "style"];
  
      unwantedTags.forEach((tag) => {
        document.querySelectorAll(tag).forEach((el) => el.remove());
      });
  
      document.querySelectorAll("*").forEach((el) => {
        unwantedAttrs.forEach((attr) => el.removeAttribute(attr));
      });
  
      const cleanedHtml = dom.serialize();
      const outputPath = path.join(outputDir, `cleaned_${uniqueId}.html`);
      await fs.writeFile(outputPath, cleanedHtml);
      console.error(`Written cleaned HTML to ${outputPath}`);
  
      return {
        success: true,
        data: `Successfully cleaned HTML and saved to ${outputPath}`,
      };
    } catch (error) {
      console.error(`Error in cleanHtml:`, error);
      return {
        success: false,
        error: error instanceof Error ? error.message : "Unknown error",
      };
    }
  }

• src/tools/htmlTools.ts:13-30 (schema)

  Schema definition for the html_cleaner tool, specifying name, description, and input parameters (inputPath and outputDir).

  export const HTML_CLEAN_TOOL: Tool = {
    name: "html_cleaner",
    description: "Clean HTML by removing unnecessary tags and attributes",
    inputSchema: {
      type: "object",
      properties: {
        inputPath: {
          type: "string",
          description: "Path to the input HTML file",
        },
        outputDir: {
          type: "string",
          description: "Directory where cleaned HTML should be saved",
        },
      },
      required: ["inputPath", "outputDir"],
    },
  };

• src/tools/_index.ts:5-9 (registration)

  Registers the html_cleaner tool (as HTML_CLEAN_TOOL) in the central tools array used for listing available tools in MCP server.

  import { HTML_CLEAN_TOOL, HTML_EXTRACT_RESOURCES_TOOL, HTML_FORMAT_TOOL, HTML_TO_MARKDOWN_TOOL, HTML_TO_TEXT_TOOL } from "./htmlTools.js";
  import { PDF_MERGE_TOOL, PDF_SPLIT_TOOL } from "./pdfTools.js";
  import { TEXT_DIFF_TOOL, TEXT_ENCODING_CONVERT_TOOL, TEXT_FORMAT_TOOL, TEXT_SPLIT_TOOL } from "./txtTools.js";
  
  export const tools = [DOCUMENT_READER_TOOL, PDF_MERGE_TOOL, PDF_SPLIT_TOOL, DOCX_TO_PDF_TOOL, DOCX_TO_HTML_TOOL, HTML_CLEAN_TOOL, HTML_TO_TEXT_TOOL, HTML_TO_MARKDOWN_TOOL, HTML_EXTRACT_RESOURCES_TOOL, HTML_FORMAT_TOOL, TEXT_DIFF_TOOL, TEXT_SPLIT_TOOL, TEXT_FORMAT_TOOL, TEXT_ENCODING_CONVERT_TOOL, EXCEL_READ_TOOL, FORMAT_CONVERTER_TOOL];

• src/index.ts:150-166 (handler)

  MCP server request handler that dispatches calls to 'html_cleaner' by invoking cleanHtml function and formatting the response.

  if (name === "html_cleaner") {
    const { inputPath, outputDir } = args as {
      inputPath: string;
      outputDir: string;
    };
    const result = await cleanHtml(inputPath, outputDir);
    if (!result.success) {
      return {
        content: [{ type: "text", text: `Error: ${result.error}` }],
        isError: true,
      };
    }
    return {
      content: [{ type: "text", text: fileOperationResponse(result.data) }],
      isError: false,
    };
  }

• src/tools/htmlTools.ts:8-10 (helper)

  Helper utility to generate unique hexadecimal IDs for output filenames used in html_cleaner.

  function generateUniqueId(): string {
    return randomBytes(9).toString("hex");
  }