前言

昨天因為小程序功能要獲取小程序程序碼，看了微信文檔爬了好多坑。（留一下記錄以防後面被坑）

操作

因為我獲取到了微信那裏的圖片的圖片流一直不知道怎麽處理，今天總算找到相關文檔，解決了。因為數據流不能直接傳給前端，只好把buffer流轉成圖片保存在服務器上，沒辦法啊~

廢話不多說上代碼

        public static string Api_Post(string postUrl, string postData, WebHeaderCollection header = null,bool isPic=false)
　　　　　{
            Stream outstream 
 
= null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = Encoding.UTF8;
            byte[] data = encoding.GetBytes(postData);
            // 準備請求...
            try
 

            {
                // 設置參數
                request = WebRequest.Create(postUrl) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                request.AllowAutoRedirect = true;
                request.Method 
 
= "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                if (header != null) request.Headers = header;
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();
                outstream.Write(data, 0, data.Length);
                outstream.Close();
                //發送請求並獲取相應回應數據
                response = request.GetResponse() as HttpWebResponse;
                //直到request.GetResponse()程序才開始向目標網頁發送Post請求
                instream = response.GetResponseStream();

                if (isPic)
                {
                    byte[] tt = StreamToBytes(instream);//將數據流轉為byte[]
                    System.IO.File.WriteAllBytes(HttpContext.Current.Server.MapPath("~/WxCode.jpg"), tt);
                    WxQRCodeModel model = new WxQRCodeModel();
                    model.data = "192.168.1.216:80/WxCode.jpg";
                    model.errcode = 0;
                    string content = Config.js.Serialize(model);
                    string err = string.Empty;
                    return content;
                }
                else
                {
                    sr = new StreamReader(instream, encoding);
                    //返回結果網頁（html）代碼
                    string content = sr.ReadToEnd();
                    string err = string.Empty;
                    return content;
                }

            }
            catch (Exception ex)
            {
                if (isPic)
                {
                    sr = new StreamReader(instream, encoding);
                    //返回結果網頁（html）代碼
                    string content = sr.ReadToEnd();
                    string err = string.Empty;
                    return content;
                }
                else
                {
                    string err = ex.Message;
                    return string.Empty;
                }
            }
        }

因為是instream接受到微信接口那裏發送過來的數據流，就在instream那裏處理，把數據流轉換為byte[]數組，然後依靠File的WriteAllBytes方法把轉換OK的byte[]數組轉換為圖片存放在服務器上，然後把圖片路徑交給model。

       ///將數據流轉為byte[]
        public static byte[] StreamToBytes(Stream stream)
        {
            List<byte> bytes = new List<byte>();
            int temp = stream.ReadByte();
            while (temp != -1)
            {
                bytes.Add((byte)temp);
                temp = stream.ReadByte();
            }
            return bytes.ToArray();
        }

結尾

最近才接觸到微信小程序開發，emmmm。覺得自己摸魚摸得好厲害，不過終於把坑爬出來，特別開心。哈哈哈~以後要多多寫開發記錄。上班期間碼得很隨意

關於微信小程序獲取小程序碼並接受buffer流保存為圖片