前言

  昨天因为小程序功能要获取小程序程序码，看了微信文档爬了好多坑。（留一下记录以防后面被坑）

操作

  因为我获取到了微信那里的图片的图片流一直不知道怎么处理，今天总算找到相关文档，解决了。因为数据流不能直接传给前端，只好把buffer流转成图片保存在服务器上，没办法啊~

废话不多说上代码 

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);            // 准备请求...            try            {                // 设置参数                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();                //发送请求并获取相应回应数据                response = request.GetResponse() as HttpWebResponse;                //直到request.GetResponse()程序才开始向目标网页发送Post请求                instream = response.GetResponseStream(); if (isPic)                {                    byte[] tt = StreamToBytes(instream);//将数据流转为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);                    //返回结果网页（html）代码                    string content = sr.ReadToEnd();                    string err = string.Empty;                    return content;                }            }            catch (Exception ex)            {                if (isPic)                {                    sr = new StreamReader(instream, encoding);                    //返回结果网页（html）代码                    string content = sr.ReadToEnd();                    string err = string.Empty;                    return content;                }                else                {                    string err = ex.Message;                    return string.Empty;                }            }        }

因为是instream接受到微信接口那里发送过来的数据流，就在instream那里处理，把数据流转换为byte[]数组，然后依靠File的WriteAllBytes方法把转换OK的byte[]数组转换为图片存放在服务器上，然后把图片路径交给model。

///将数据流转为byte[]        public static byte[] StreamToBytes(Stream stream)        {            List
     
       bytes = new List
      
       ();            int temp = stream.ReadByte();            while (temp != -1)            {                bytes.Add((byte)temp);                temp = stream.ReadByte();            }            return bytes.ToArray();        }
      
     

结尾

最近才接触到微信小程序开发，emmmm。觉得自己摸鱼摸得好厉害，不过终于把坑爬出来，特别开心。哈哈哈~以后要多多写开发记录。上班期间码得很随意