```bash
~ mc admin config get myminio compression
compression extensions=".txt,.log,.csv,.json,.tar,.xml,.bin" mime_types="text/*,application/json,application/xml"
```

Default config includes most common highly compressible content extensions and mime-types.

```bash
~ mc admin config set myminio compression extensions=".pdf" mime_types="application/pdf"
```

To show help on setting compression config values.

```bash

ome":{"_":[{"key":"enable","value":"off"},{"key":"frequency","value":"24h"}]},"compression":{"_":[{"key":"enable","value":"off"},{"key":"allow_encryption","value":"off"},{"key":"extensions","value":".txt,.log,.csv,.json,.tar,.xml,.bin"},{"key":"mime_types","value":"text/*,application/json,application/xml,binary/octet-stream"}]},"crawler":{"_":null},"credentials":{"_":null},"drive":{"_":[{"key":"max_timeout","value":""}]},"etcd":{"_":[{"key":"endpoints","value":""},{"key":"path_prefix","value":""...

    default boolean isHtmlMimetypeForCache(final String mimetype) {
        final String[] mimetypes = getCrawlerDocumentCacheHtmlMimetypes().split(",");
        if (mimetypes.length == 1 && StringUtil.isBlank(mimetypes[0])) {
            return true;
        }
        return stream(mimetypes).get(stream -> stream.anyMatch(s -> s.equalsIgnoreCase(mimetype)));
    }

    String getCrawlerDocumentCacheSupportedMimetypes();

        final String mimeType;
        if (response instanceof HtmlResponse) {
            mimeType = "text/html";
        } else if (response instanceof JsonResponse) {
            mimeType = "application/json";
        } else if (response instanceof XmlResponse) {
            mimeType = "text/xml";
        } else if (response instanceof StreamResponse) {
            mimeType = "application/octet-stream";

        for (String mimeType : supportedTypes) {
            Map<String, Object> docMap = new HashMap<>();
            docMap.put("mimetype", mimeType);
            assertTrue("Should support " + mimeType, thumbnailGenerator.isTarget(docMap));
        }

        for (String mimeType : unsupportedTypes) {
            Map<String, Object> docMap = new HashMap<>();

        assertArgumentNotEmpty("path", path);

        final InputStream is = ResourceUtil.getResourceAsStream(path);
        try {
            final String mimetype = URLConnection.guessContentTypeFromStream(is);
            if (mimetype != null) {
                return mimetype;
            }
            return URLConnection.guessContentTypeFromName(path);
        } catch (final IOException e) {
            throw new IORuntimeException(e);

     *
     * @param mimetype the MIME type to map (e.g., "application/pdf")
     * @param filetype the file type classification (e.g., "pdf")
     */
    public void add(final String mimetype, final String filetype) {
        mimetypeMap.put(mimetype, filetype);
    }

    /**
     * Retrieves the file type for a given MIME type.
     *
     * @param mimetype the MIME type to look up

        final String mimeType = responseData.getMimeType();
        if (logger.isDebugEnabled()) {
            logger.debug("mimeType: {}", mimeType);
        }
        if (mimeType == null) {
            response.contentTypeOctetStream();
            return;
        }
        if (mimeType.startsWith("text/")) {
            final String charset = responseData.getCharSet();

}

private fun Main.mediaType(): MediaType? {
  val mimeType =
    headers?.let {
      for (header in it) {
        val parts = header.split(':', limit = 2)
        if ("Content-Type".equals(parts[0], ignoreCase = true)) {
          return@let parts[1].trim()
        }
      }
      return@let null
    } ?: "application/x-www-form-urlencoded"

  return mimeType.toMediaTypeOrNull()
}

index.field.created=created
# Field name for timestamp in the index.
index.field.timestamp=timestamp
# Field name for label in the index.
index.field.label=label
# Field name for MIME type in the index.
index.field.mimetype=mimetype
# Field name for parent ID in the index.
index.field.parent_id=parent_id
# Field name for important content in the index.
index.field.important_content=important_content
# Field name for content in the index.