如何在Swift中向使用Combine发出的HTTP GET请求添加正文？

import Combine
import Foundation

guard let url = URL(string: "https://example.com/api/endpoint") else {
    fatalError("Invalid URL")
}

var request = URLRequest(url: url)
request.httpMethod = "GET"

let bodyData = "Hello, World!".data(using: .utf8)!
let bodyPublisher = Just(bodyData)

request.httpBody = try? bodyPublisher.collect().first().get()

URLSession.shared.dataTaskPublisher(for: request)
    .tryMap { data, response in
        // 处理响应数据
        return data
    }
    .decode(type: YourResponseType.self, decoder: JSONDecoder())
    .sink(receiveCompletion: { completion in
        // 处理请求完成事件
    }, receiveValue: { value in
        // 处理请求成功的响应数据
    })
    .store(in: &cancellables)