使用HarmonyOS Next开发端云一体化项目，如何实现用户自定义题目上传功能？需设计云端数据校验规则与敏感词

import { Component, State } from '@ohos.app.ability.UI';

@Component
struct UploadQuestionPage {
    @State question: string = '';

    build() {
        Column() {
            TextField({
                text: this.question,
                placeholder: '请输入题目',
                onChange: (value) => {
                    this.question = value;
                }
            })
           .width('90%')
           .height(40)
           .margin({ top: 20 })

            Button('上传题目')
           .width('90%')
           .height(40)
           .margin({ top: 20 })
           .onClick(() => {
                // 调用上传函数
                this.uploadQuestion();
            })
        }
       .width('100%')
       .height('100%')
       .padding(20)
    }

    async uploadQuestion() {
        // 这里使用@ohos.net.http模块发送请求到云端
        import http from '@ohos.net.http';
        const request = {
            url: 'https://your-cloud-server.com/upload-question',
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            data: JSON.stringify({ question: this.question })
        };

        try {
            const response = await http.request(request);
            if (response.statusCode === 200) {
                console.info('题目上传成功');
            } else {
                console.error('题目上传失败，状态码:', response.statusCode);
            }
        } catch (error) {
            console.error('上传过程中发生错误:', error);
        }
    }
}

const express = require('express');
const Joi = require('joi');
const app = express();
app.use(express.json());

// 定义题目数据校验规则
const questionSchema = Joi.object({
    question: Joi.string()
      .min(1) // 题目长度至少为1
      .max(200) // 题目长度最多为200
      .required() // 题目为必填项
});

app.post('/upload-question', async (req, res) => {
    const { error } = questionSchema.validate(req.body);
    if (error) {
        return res.status(400).json({ error: error.details[0].message });
    }
    // 数据校验通过，继续进行敏感词过滤
    //...
});

const port = process.env.PORT || 3000;
app.listen(port, () => {
    console.log(`Server running on port ${port}`);
});

// 假设的敏感词库
const sensitiveWords = ['敏感词1', '敏感词2', '敏感词3'];

app.post('/upload-question', async (req, res) => {
    const { error } = questionSchema.validate(req.body);
    if (error) {
        return res.status(400).json({ error: error.details[0].message });
    }

    const question = req.body.question;
    const hasSensitiveWord = sensitiveWords.some(word => question.includes(word));
    if (hasSensitiveWord) {
        return res.status(403).json({ error: '题目包含敏感词' });
    }

    // 数据校验和敏感词过滤都通过，存储题目数据
    // 这里假设使用mongoose操作MongoDB存储数据
    //...

    res.status(200).json({ message: '题目上传成功' });
});