Unity 基础 之 UnityWebRequest Post 的简单封装使用

一、简单介绍

Unity中的一些知识点整理。

本节简单介绍在Unity开发中的，使用 UnityWebRequest，进行 Post 请求，值得注意的是，根据不同的请求头，注意传入不同的数据格式就好，如果你有新的方式也可以留言，多谢。

具体可参见 Unity 官网 UnityWebRequest 介绍

Unity - Manual: UnityWebRequest

二、实现原理

1、UnityWebRequest(url, "POST") 进行 Post 请求

2、UnityWebRequest.uploadHandler = new UploadHandlerRaw(postBytes); //添加数据
      UnityWebRequest.downloadHandler = new DownloadHandlerBuffer(); // 数据Buffer
      UnityWebRequest.SetRequestHeader("Content-Type", requestHeaderStr);// 请求头设置

三、注意事项

1、注意请求头设置不同，传入的数据格式会有所区别

2、注意字符串转为字节数组

四、效果预览

五、实现步骤

1、打开Unity，新建工程

2、编写脚本，实现 UnityWebRequest  Post 功能

3、把 测试脚本挂载场景中

4、运行场景，效果如上

六、关键代码

1、TestUnityWebRequestPostSimpleWrapper

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace XANUtils.TestSpace
{ 

	public class TestUnityWebRequestPostSimpleWrapper : MonoBehaviour
	{
		// Start is called before the first frame update
		void Start()
		{
			Test();
		}

		void Test() {
			UnityWebRequestPostSimpleWrapper postSimpleWrapper = new UnityWebRequestPostSimpleWrapper(this);

			//请求头 Form 表单格式 Post
			postSimpleWrapper.StartUnityWebRequestPost("你的网址",
				"你的类似格式数据：password=12345",                       // 更加请求头不同，Post Data 数据不同
				"application/x-www-form-urlencoded",    // form 格式
				(isNotError,responseStr)=> {
					if (isNotError)
					{
						Debug.Log(GetType() + "/Test()/ responseStr : " + responseStr);
						Debug.Log(GetType() + "/Test()/ 解析 responseStr ... " );
					}
					else {
						Debug.Log(GetType() + "/Test()/ error : " + responseStr);
						Debug.Log(GetType() + "/Test()/ 针对报错，检查处理 ... ");
					}
				});

			//请求头 Json 表单格式 Post
			postSimpleWrapper.StartUnityWebRequestPost("你的网址",
				"你的类似格式数据：{\"password\":\"12345\"}", // 更加请求头不同，Post Data 数据不同
				"application/json",			// json 格式
				(isNotError, responseStr) => {
					if (isNotError)
					{
						Debug.Log(GetType() + "/Test()/ responseStr : " + responseStr);
						Debug.Log(GetType() + "/Test()/ 解析 responseStr ... ");
					}
					else
					{
						Debug.Log(GetType() + "/Test()/ error : " + responseStr);
						Debug.Log(GetType() + "/Test()/ 针对报错，检查处理 ... ");
					}
				});
		}
	}
}

2、UnityWebRequestPostSimpleWrapper

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

namespace XANUtils { 

	public class UnityWebRequestPostSimpleWrapper 
	{
		private MonoBehaviour mMono;
		public UnityWebRequestPostSimpleWrapper(MonoBehaviour mono) {
			mMono = mono;
		}

		public Coroutine StartUnityWebRequestPost(string url, string postData, string requestHeaderStr, Action<bool, string> onPostCallback) {
            if (mMono==null)
            {
				Debug.LogError(GetType()+ "/StartUnityWebRequestPost()/ mMono can not be null");
				return null;
            }

			return mMono.StartCoroutine(UnityWebRequestPost(url, postData, requestHeaderStr, onPostCallback));
		}

		IEnumerator UnityWebRequestPost(string url, string postData,string requestHeaderStr, Action<bool,string> onPostCallback)
		{
			
			using (UnityWebRequest webRequest = new UnityWebRequest(url, "POST"))
			{
				Debug.Log(GetType() + "/UnityWebRequestPost()/ url : " + webRequest.url);
				Debug.Log(GetType() + "/UnityWebRequestPost()/ postData : " + postData);

				byte[] postBytes = System.Text.Encoding.UTF8.GetBytes(postData);
				webRequest.uploadHandler = new UploadHandlerRaw(postBytes);
				webRequest.downloadHandler = new DownloadHandlerBuffer();
				webRequest.SetRequestHeader("Content-Type", requestHeaderStr); 

				yield return webRequest.SendWebRequest();
				string response = null;
				if (webRequest.isNetworkError || webRequest.isHttpError )
				{
					response = webRequest.error;
					Debug.LogError(GetType() + "/UnityWebRequestPost()/ error : " + webRequest.error);

					if (onPostCallback != null)
					{
						onPostCallback.Invoke(false, response);

					}
				}
				else
				{

					response = webRequest.downloadHandler.text;
					
					Debug.Log(GetType() + "/UnityWebRequestPost()/ success : " + response);

					if (onPostCallback != null)
					{
						onPostCallback.Invoke(true, response);

					}
				}
			}

		}
	}
}