During crawling and indexing, Fess:

1. Detects language from document content using Apache Tika
2. Validates against `supported.languages` list
3. Creates language-specific fields (e.g., `content_ja`, `title_en`, `content_sv`)
4. Applies language-specific analyzers for better search results

Configured in `fess_config.properties`:
```properties
indexer.language.fields=content,important_content,title
```

    ]
    filename: Annotated[Optional[str], Doc("The original file name.")]
    size: Annotated[Optional[int], Doc("The size of the file in bytes.")]
    headers: Annotated[Headers, Doc("The headers of the request.")]
    content_type: Annotated[
        Optional[str], Doc("The content type of the request, from the headers.")
    ]

    async def write(
        self,
        data: Annotated[
            bytes,
            Doc(

### `UploadFile` { #uploadfile }

`UploadFile` hat die folgenden Attribute:

* `filename`: Ein `str` mit dem ursprünglichen Namen der hochgeladenen Datei (z. B. `meinbild.jpg`).
* `content_type`: Ein `str` mit dem Inhaltstyp (MIME-Typ / Medientyp) (z. B. `image/jpeg`).

### `UploadFile` { #uploadfile }

`UploadFile` имеет следующие атрибуты:

* `filename`: Строка `str` с исходным именем файла, который был загружен (например, `myimage.jpg`).
* `content_type`: Строка `str` с типом содержимого (MIME type / media type) (например, `image/jpeg`).

        // Test with Japanese characters
        String word = "日本語テスト";
        float boost = 2.0f;
        List<String> readings = Arrays.asList("ニホンゴテスト");
        List<String> fields = Arrays.asList("content_ja");
        List<String> tags = Arrays.asList("japanese");
        List<String> roles = Arrays.asList("admin");

        elevateWord = new ElevateWord(word, boost, readings, fields, tags, roles);

        final Map<String, String> params = new HashMap<>(crawlingConfig.getConfigParameterMap(ConfigName.CONFIG));
        params.put(ExtractData.RESOURCE_NAME_KEY, getResourceName(responseData));
        params.put(ExtractData.CONTENT_TYPE, responseData.getMimeType());
        params.put(ExtractData.CONTENT_ENCODING, responseData.getCharSet());
        params.put(ExtractData.URL, responseData.getUrl());

# Meta prefix for GSA queries.
query.gsa.meta.prefix=MT_
# Charset field for GSA index queries.
query.gsa.index.field.charset=charset
# Content type field for GSA index queries.
query.gsa.index.field.content_type.=content_type
# Maximum concurrent group results for collapse queries.
query.collapse.max.concurrent.group.results=4
# Inner hits name for collapse queries.
query.collapse.inner.hits.name=similar_docs

* 📝 Fix code consistency in examples for Tutorial - User Guide - Path Parameters. PR [#2158](https://github.com/tiangolo/fastapi/pull/2158) by [@nukopy](https://github.com/nukopy).
* 📝 Fix renamed parameter `content_type` typo. PR [#2135](https://github.com/tiangolo/fastapi/pull/2135) by [@TeoZosa](https://github.com/TeoZosa).