import jakarta.validation.constraints.Size;

/**
 * The create form for Request Header.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }

    /**
     * The CRUD mode for the form.
     */
    @ValidateTypeFailure
    public Integer crudMode;

    /**

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: FormData = Form()):

from fastapi import FastAPI, File, Form, UploadFile

app = FastAPI()


@app.post("/files/")
async def create_file(
    file: bytes = File(), fileb: UploadFile = File(), token: str = Form()
):
    return {
        "file_size": len(file),
        "token": token,
        "fileb_content_type": fileb.content_type,

from typing import Annotated

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;

/**
 * Action class for handling help page requests in the Fess search application.
 * This class extends FessSearchAction to provide help functionality including
 * authentication checks and form parameter setup for the help interface.
 */
public class HelpAction extends FessSearchAction {

                                            <la:form action="/admin/backup/upload/" enctype="multipart/form-data"
                                                     styleClass="form-inline">
                                                <label for="bulkFile" class="mb-2 mr-2"><la:message
                                                        key="labels.backup_bulk_file"/></label>

///

## 什么是 「表单数据」

与 JSON 不同，HTML 表单（`<form></form>`）向服务器发送数据通常使用「特殊」的编码。

**FastAPI** 要确保从正确的位置读取数据，而不是读取 JSON。

/// note | 技术细节

不包含文件时，表单数据一般用 `application/x-www-form-urlencoded`「媒体类型」编码。

但表单包含文件时，编码为 `multipart/form-data`。使用了 `File`，**FastAPI** 就知道要从请求体的正确位置获取文件。

     *
     * @param dictId the dictionary ID
     * @param form the upload form containing the dictionary file
     * @return JSON response with result status
     */
    // PUT /api/admin/dict/synonym/upload/{dictId}
    @Execute
    public JsonResponse<ApiResult> put$upload(final String dictId, final UploadForm form) {
        form.dictId = dictId;
        validateApi(form, messages -> {});

     * Excludes sensitive information like LDAP security credentials from the response.
     *
     * @return JSON response containing the general settings configuration
     */
    @Execute
    public JsonResponse<ApiResult> get$index() {
        final EditBody form = new EditBody();
        AdminGeneralAction.updateForm(fessConfig, form);
        form.ldapAdminSecurityCredentials = null;

import jakarta.validation.constraints.Size;

/**
 * The create form for File Authentication.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
        // Default constructor
    }

    /** The CRUD operation mode for this form. */
    @ValidateTypeFailure
    public Integer crudMode;