**FastAPI**'s `UploadFile` inherits directly from **Starlette**'s `UploadFile`, but adds some necessary parts to make it compatible with **Pydantic** and the other parts of FastAPI.

///

## What is "Form Data" { #what-is-form-data }

The way HTML forms (`<form></form>`) sends the data to the server normally uses a "special" encoding for that data, it's different from JSON.

**FastAPI** will make sure to read that data from the right place instead of JSON.

    @UriType(protocolType = ProtocolType.FILE)
    @CustomSize(maxKey = "form.admin.max.input.size")
    public String paths;

    /** The paths to include during crawling (pattern-based). */
    @CustomSize(maxKey = "form.admin.max.input.size")
    public String includedPaths;

    /** The paths to exclude during crawling (pattern-based). */
    @CustomSize(maxKey = "form.admin.max.input.size")
    public String excludedPaths;

                                        <la:text styleId="hostname" property="hostname" styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="port" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.webauth_port"/></label>

                                        <la:text styleId="name" property="name" styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="value" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.reqheader_value"/></label>

                                        <la:text styleId="hostname" property="hostname" styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="port" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.file_auth_port"/></label>

                                    <div class="form-inline col-sm-9">
                                        <la:errors property="popularWord"/>
                                        <div class="form-check">
                                            <la:checkbox styleId="popularWord" styleClass="form-check-input" property="popularWord"/>
                                            <label for="popularWord" class="form-check-label">

                                        <la:text styleId="name" property="name" styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="handlerName" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.handler_name"/></label>

        validate(form, messages -> {}, () -> asListHtml(form.dictId));
        charMappingService.getCharMappingItem(form.dictId, form.id).ifPresent(entity -> {
            form.inputs = entity.getInputsValue();
            form.output = entity.getOutput();
        }).orElse(() -> {
            throwValidationError(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, form.getDisplayId()),

Wenn Sie Felder aus Formularen statt JSON empfangen müssen, können Sie `Form` verwenden.

/// info

Um Formulare zu verwenden, installieren Sie zuerst <a href="https://andrew-d.github.io/python-multipart/" class="external-link" target="_blank">`python-multipart`</a>.

Z. B. `pip install python-multipart`.

///

## `Form` importieren

Importieren Sie `Form` von `fastapi`:

Bạn cũng có thể trả về Pydantic model (bạn sẽ thấy nhiều hơn về nó sau).

Có nhiều object và model khác nhau sẽ được tự động chuyển đổi sang JSON (bao gồm cả ORM,...). Thử sử dụng loại ưa thích của bạn, nó có khả năng cao đã được hỗ trợ.

## Tóm lại

* Import `FastAPI`.
* Tạo một `app` instance.
* Viết một **decorator cho đường dẫn toán tử** (giống như `@app.get("/")`).