2. Weixin Recording Upload and Download

If you want to download the specified path, you need to upload the recording to the Wechat server first, and then download the interface provided by Wechat to your target path according to the returned serverId (that is, downloaded MEDIA_ID). If the Wechat test environment is not a problem, it will be basically OK, but debugging and other troublesome things can only be checked by writing a log. Wechat also provides an interface for testing, input parameters, and access to error information.

/// <SUMMARY> 
        /// Download and save multimedia files,Return to Multimedia Save Path 
        /// </SUMMARY> 
        /// <PARAM name="ACCESS_TOKEN"></PARAM> 
        /// <PARAM name="MEDIA_ID"></PARAM> 
        /// <RETURNS></RETURNS> 
        public string GetMultimedia(string ACCESS_TOKEN, string MEDIA_ID)
        {
            string file = string.Empty;
            string strpath = string.Empty;
            string stUrl = Common.TextHelper.WXUploadMediaUrl+"?access_token=" + ACCESS_TOKEN + "&media_id=" + MEDIA_ID;

            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(stUrl);

            req.Method = "GET";
            using (WebResponse wr = req.GetResponse())
            {
                HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse();

                strpath = myResponse.ResponseUri.ToString();

                WebClient mywebclient = new WebClient();
                string basePath = AppDomain.CurrentDomain.BaseDirectory + "Attachment";//Attachment temporary storage path
                string amrFile = DateTime.Now.ToString("yyyyMMddhhmmssms")+".amr";
                string mp3File= DateTime.Now.ToString("yyyyMMddhhmmssms")+".mp3";
                try
                {
                    mywebclient.DownloadFile(strpath, Path.Combine(basePath, amrFile));
                    ConvertToMp3(Path.Combine(basePath, amrFile), Path.Combine(basePath, mp3File));
                    file = mp3File;
                    //file = amrFile;
                }
                catch (Exception ex)
                {
                    //savepath = ex.ToString();
                }

            }
            return file ;
        }

 

Reference documents: http://www.cnblogs.com/zhangs1986/p/3636234.html

3. Voice Recording Format Conversion

amr format files, web pages can not play, so need to be converted to MP3 format, many viewers choose to use the third-party tool ffmpeg. When we first started using it, we encountered the embarrassing situation that MP3 can be converted to wav format, but amr format can not be converted to mp3. It took a long time before the amr file used for testing was found to be corrupted. This story tells us that we must be careful, and don't panic when we encounter problems. Take a deep breath and check it from scratch. Maybe we will get some results.

public string ConvertToMp3(string pathBefore, string pathLater)
         {
             string c = System.Web.HttpContext.Current.Server.MapPath("/ffmpeg/") + @"ffmpeg.exe -i " + pathBefore + " " + pathLater;
             log.WriteLine(c);
             string str = RunCmd(c);
             return str;
         }

        /// <summary>
        /// implement Cmd command
        /// </summary>
        private string RunCmd(string c)
        {
            try
            {
                ProcessStartInfo info = new ProcessStartInfo("cmd.exe");
                info.RedirectStandardOutput = false;
                info.UseShellExecute = false;
                Process p = Process.Start(info);
                p.StartInfo.UseShellExecute = false;
                p.StartInfo.RedirectStandardInput = true;
                p.StartInfo.RedirectStandardOutput = true;
                p.StartInfo.RedirectStandardError = true;
                p.Start();
                p.StandardInput.WriteLine(c);
                p.StandardInput.AutoFlush = true;
                Thread.Sleep(1000);
                p.StandardInput.WriteLine("exit");
                p.WaitForExit();
                string outStr = p.StandardOutput.ReadToEnd();
                p.Close();

                return outStr;
            }
            catch (Exception ex)
            {
                return "error" + ex.Message;
            }
        }

Reference documents: http://www.cnblogs.com/LittleBai/p/5924416.html

 

 

4. The path is correct, but the attachment is not available (iis mine type configuration)

The information submitted by the public number includes pictures, audio and video, which are all placed in the same folder after uploading to the server, but when the web page is displayed, pictures can be accessed, but audio and video hints can not be accessed. Ask the boss before you know that the mine type on iis needs to be configured. Because what I have done before is not web development, or even c # development, so many pits have not been trampled on, can only be trampled one by one, long memory. The so-called experience is probably more pits trampled on it! ____________