BairdyB
Deno•3y ago
Bairdy

Parsing Apache mime.types into dictionary Record<string, string>

This code parses the official Apache mime.types from GitHub and creates a dictionary Record<string, string> of all lines that have not been commented out. Perhaps it may help someone learning and using Deno serve so I wanted to share.

/**
 * Run command:
 * deno run --allow-net --check apache_getmime.ts
 * 
 * Output example:
 * 
 *  const MIME_TYPES: Record<string, string> = {
 *    ".ext1": "type/subtype",
 *    ".ext2": "type/subtype",
 *    ".ext3": "type/subtype",
 *  };
 * 
 */
// Declare an empty dictionary object called MIME_TYPES
const MIME_TYPES: Record<string, string> = {};

// Define an async function to fetch and parse MIME types from a remote server
async function parseApacheMimeTypes(): Promise<void> {
  // Fetch the MIME types file from the remote server
  const response = await fetch("https://raw.githubusercontent.com/apache/httpd/trunk/docs/conf/mime.types");
  // Extract the text content of the MIME types file
  const text = await response.text();
  // Split the text content into an array of individual lines
  const lines = text.split("\n");
  // Loop through each line in the array
  for (const line of lines) {
    // Skip lines that are commented out
    if (line.startsWith("#")) {
      continue;
    }
    // Extract the media type and extensions from the active line
    const [mediaType, ...extensions] = line.trim().split(/\s+/);
    // Loop through each extension and add it to the MIME_TYPES dictionary with the corresponding media type
    for (const extension of extensions) {
      MIME_TYPES["." + extension] = mediaType;
    }
  }  
  // Output the completed MIME_TYPES dictionary to the console
  console.info(MIME_TYPES);
}

// Call the async function to retrieve and parse the MIME types
await parseApacheMimeTypes();
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