封装Unity的网络请求中常用功能

public class WebManager : MonoBehaviour
    {
        
        # region 单例模式控制web请求相关
        private static WebManager _mgr = null;
        float startTime = 0;
        public static WebManager _instance
        {
            get
            {
                if (_mgr == null)
                {
                    GameObject mgrGo = new GameObject("WebManager");
                    _mgr = mgrGo.AddComponent<WebManager>();
                }
                return _mgr;
            }

            set
            {
                _mgr = value;
            }
        }
        #endregion


        //UnityWebRequest请求方式   common
        public void SendRequest(string url,byte[]postData,Dictionary<string,string> headerDic,Action<UnityWebRequest> callback)
        {
            startTime = Time.realtimeSinceStartup;
            StartCoroutine(CoroutineRequest(AppConst.BaseUrl+url, postData, headerDic, callback));
        }
        //postData为空的时候是Get请求，反之则为Post请求
        IEnumerator CoroutineRequest(string url, byte[] postData, Dictionary<string, string> headerDic, Action<UnityWebRequest> callback)
        {
            var verb = postData == null ? UnityWebRequest.kHttpVerbGET : UnityWebRequest.kHttpVerbPOST;
            UnityWebRequest uwr = new UnityWebRequest(url,verb);
            uwr.chunkedTransfer = false;
            UploadHandler formUploadHandler = new UploadHandlerRaw(postData);
            formUploadHandler.contentType = "application/json";
            uwr.uploadHandler = formUploadHandler;
            uwr.downloadHandler = new DownloadHandlerBuffer();
            foreach (var header in headerDic)
            {
                uwr.SetRequestHeader(header.Key,header.Value);
            }
            yield return uwr.SendWebRequest();
            CommonMethod(uwr,callback);
          
        }

        #region 分开的 get Post 请求
        #region get  请求 获取字符串类型
        public void SendGetRquest(string url, Dictionary<string, string> headerDic, Action<UnityWebRequest> callBack)
        {

            StartCoroutine(GetRequest(AppConst.BaseUrl+ url, headerDic, callBack));

        }
        private IEnumerator GetRequest(string url, Dictionary<string, string> headerDic, Action<UnityWebRequest> callback)
        {
            using (UnityWebRequest uwr = UnityWebRequest.Get(url))
            {
                foreach (var key in headerDic.Keys)
                {
                    uwr.SetRequestHeader(key, headerDic[key]);
                }
                yield return uwr.SendWebRequest();
                CommonMethod(uwr, callback);
            }
        }
        #endregion
        #region Post请求方式

        public void SendPostRequest(string url, WWWForm form, Dictionary<string, string> headerDic, Action<UnityWebRequest> callback)
        {
            StartCoroutine(PostRequest(AppConst.BaseUrl + url, form, headerDic, callback));
        }
        IEnumerator PostRequest(string url, WWWForm form, Dictionary<string, string> headerDic, Action<UnityWebRequest> callback)
        {
            UnityWebRequest uwr = UnityWebRequest.Post(url, form);
            foreach (var key in headerDic.Keys)
            {
                uwr.SetRequestHeader(key, headerDic[key]);
            }
            yield return uwr.SendWebRequest();
            CommonMethod(uwr, callback);

        }

        #endregion
        #endregion


        #region 获取Texture
        public void RequestTexture(string url, Action<Texture2D> callback)
        {
            startTime = Time.realtimeSinceStartup;
            StartCoroutine(GetTexture(url, callback));
        }
        IEnumerator GetTexture(string url, Action<Texture2D> callback)
        {
            UnityWebRequest uwr =UnityWebRequest.Get(url);
            DownloadHandlerTexture downloadTexture = new DownloadHandlerTexture(true);
            uwr.downloadHandler = downloadTexture;
            yield return uwr.SendWebRequest();
            Texture2D t = null;
            if (!(uwr.isNetworkError || uwr.isHttpError))
            {
                t = downloadTexture.texture;
            }
            else
            {
                Debug.Log("download Texture Error");
            }

            if (callback != null)
             {
                Debug.Log("请求消耗时间：" + (Time.realtimeSinceStartup - startTime));
                callback(t);
            }
           
          
        }
        #endregion

        #region 获取视频

        //public void RequestVideo(string url,Action<MovieTexture> callback)
        //{
        //    StartCoroutine(GetVideo(baseUrl+url, callback));
        //}
        //IEnumerator GetVideo(string url,Action<MovieTexture> callbcak)
        //{
        //    using(var uwr= UnityWebRequestMultimedia.GetMovieTexture(url))
        //    {
        //        yield return uwr.SendWebRequest();
        //        if(!(uwr.isNetworkError||uwr.isHttpError))
        //        {
        //            if(callbcak!=null)
        //            {
        //                callbcak(DownloadHandlerMovieTexture.GetContent(uwr));
        //            }
        //        }
        //    }
        //}
        #endregion
        #region 获取音频
        public void RequestAudio(string url, Action<AudioClip> callback, AudioType audioType = AudioType.WAV)
        {
            StartCoroutine(GetAudioClip(AppConst.BaseUrl + url, callback, audioType));
        }
        IEnumerator GetAudioClip(string url, Action<AudioClip> callback, AudioType audioType = AudioType.WAV)
        {
            using (var uwr = UnityWebRequestMultimedia.GetAudioClip(url, audioType))
            {
                yield return uwr.SendWebRequest();
                if (!(uwr.isNetworkError || uwr.isHttpError))
                {
                    if (callback != null)
                    {
                        callback(DownloadHandlerAudioClip.GetContent(uwr));
                    }
                }
            }
        }
        #endregion

      

        #region 下载AssetBundle 

        public void RequestAB(string url,Action<AssetBundle> callbcak)
        {
            StartCoroutine(GetAssetBundle(AppConst.BaseUrl + url, callbcak));
        }
        IEnumerator GetAssetBundle(string url, Action<AssetBundle> callbcak)
        {
            UnityWebRequest request = new UnityWebRequest(url);
            DownloadHandlerAssetBundle handler = new DownloadHandlerAssetBundle(request.url, uint.MaxValue);
            request.downloadHandler = handler;
            yield return request.SendWebRequest();
            if (!(request.isHttpError || request.isNetworkError))
            {
                if (callbcak != null)
                {
                    callbcak(handler.assetBundle);
                }
            }
        }

        #endregion

        #region  文件上传相关

        public void UploadFile(string url, byte[] contentBytes, Action<bool> callback)
        {
            StartCoroutine(UploadByPut(AppConst.BaseUrl + url, contentBytes, callback));
        }
        // 可以结合WebUtility中的Formatter方法将对象转化为byte数组传递给服务端
        IEnumerator UploadByPut(string url, byte[] contentBytes, Action<bool> callback, string contentType = "application/octet-stream")
        {
            UnityWebRequest uwr = new UnityWebRequest(url);
            UploadHandler uploader = new UploadHandlerRaw(contentBytes);
            uploader.contentType = contentType;

            uwr.uploadHandler = uploader;

            yield return uwr.SendWebRequest();

            bool isUploadSuccess = true;
            if (uwr.isNetworkError || uwr.isHttpError)
            {
                isUploadSuccess = false;
            }
            if (callback != null)
            {
                callback(isUploadSuccess);  //isUploadSuccess参数表示是否上传成功
            }
        }
        #endregion


        //HttpWebRequest Get请求
        public void HttpRequest(string url,Action<string> callback)
        {
            startTime = Time.realtimeSinceStartup;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppConst.BaseUrl + url);
            request.Method = "GET";
            request.ContentType = "application/json";
            request.UserAgent = null;
            request.Timeout = 10000; //这里设置了十秒超时时间
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream resStream= response.GetResponseStream();
            StreamReader streamReader = new StreamReader(resStream, Encoding.UTF8);
            string readerStr = streamReader.ReadToEnd();
            streamReader.Close();
            resStream.Close();
            if(callback!=null)
            {
                Debug.Log("请求消耗时间："+(Time.realtimeSinceStartup- startTime));
                callback(readerStr);
            }
        }

        //HttpWebRequest Post请求
        public void HttpRequest(string url,string postData,Dictionary<string,string> headerDic,Action<string> callback)
        {
            startTime = Time.realtimeSinceStartup;
            byte[] data = Encoding.UTF8.GetBytes(postData);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(AppConst.BaseUrl + url);
            request.Method = "POST";
            request.ContentType = "application/json";
            request.UserAgent = null;
            request.Timeout = 100000; //这里设置了十秒超时时间
            foreach (var key in headerDic.Keys)
            {
                request.Headers.Add(key, headerDic[key]);
            }

            request.ContentLength = data.Length;

            using (Stream newStream = request.GetRequestStream())
            {
                //// Send the data.
                newStream.Write(data, 0, data.Length);
            }

            // Get response
            HttpWebResponse myResponse = (HttpWebResponse)request.GetResponse();
            StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
            string content = reader.ReadToEnd();
            if(callback!=null)
            {
                Debug.Log("请求消耗时间：" + (Time.realtimeSinceStartup - startTime));
                callback(content);
            }
        }
        void CommonMethod(UnityWebRequest uwr, Action<UnityWebRequest> callback)
        {
            switch (uwr.responseCode)
            {
                case 200:
                   if(callback!=null)
                    {
                        callback(uwr);
                    }
                    break;
                case 404:
                default:
                    //此处UI提示
                    //{"timestamp":1562662472679,"status":404,"error":"Not Found","message":"No message available","path":"/game/v1/user/%7B2175b2265eb37c3242c1ed258839b650%7D/login"}
                    Debug.Log("404 Not Found");
                    UIManager.HideAll();
                    UIManager.Show("UILoading");
                    break;
            }
        }
       
    }