从谷歌和译典通能上自动下载英语单词mp3的好方法

最近在学英语，很多单词不怎么会读．每次得去iciba.com和dreye.com上查，很是麻烦！

后来一想，能不能写个程序自动下载？测试一番，最终搞定！

下载的都是真人语音mp3，效果很棒！谷歌爱词霸是女声发音，译典通是男声发音，各有千秋．

核心的代码：

bool DownMp3FromDrEye(string word, string localPath)
        {
            HttpWebRequest webRequest = WebRequest.Create("http://www.dreye.com.cn/ews/dict.php") as HttpWebRequest;
            webRequest.Method = "POST";
            webRequest.ContentType = "application/x-www-form-urlencoded";

            string postString = "w=" + word;
            postString = System.Web.HttpUtility.HtmlEncode(postString);
            byte[] postData = Encoding.ASCII.GetBytes(postString);
            webRequest.ContentLength = postData.Length;

            Stream reqStream = webRequest.GetRequestStream();
            reqStream.Write(postData, 0, postData.Length);
            reqStream.Close();

            Stream respStream = webRequest.GetResponse().GetResponseStream();
            StreamReader reader = new StreamReader(respStream, true);
            string html = reader.ReadToEnd();
            respStream.Close();
            //Debug.Write(html);

            string prefix = "http{add}";
            int i = html.IndexOf(prefix);
            int k = i + prefix.Length;
            string mp3Url = "http:";
            while (html.Substring(k,1)!="\"")
            {
                mp3Url += html.Substring(k, 1);
                k++;
            }

            Debug.WriteLine("Word:" + word + ", URL; " + mp3Url);

            if (!mp3Url.EndsWith(".mp3"))
            {
                return false;
            }

            SetLog("Downloading from DrEye.com");
            SetLog("Mp3 URL: " + mp3Url);
            DownFile(mp3Url, Path.Combine(localPath, word + ".mp3"), true);
            return true;
        }

        bool DownMp3FromIciba(string word, string localPath)
        {
            //_customerDetail =  _customerDb.GetCustomerById(1);
            string icabaWebUrl = "http://www.iciba.com/";
            string wordWebUrl = icabaWebUrl + word + "/";
            HttpWebRequest webRequest1 = WebRequest.Create(new Uri(wordWebUrl)) as HttpWebRequest;
            HttpWebResponse webResponse1 = webRequest1.GetResponse() as HttpWebResponse;
            Stream stream1 = webResponse1.GetResponseStream();
            StreamReader reader1 = new StreamReader(stream1);
            string html = reader1.ReadToEnd();

            string mp3TextStarter = "echoAudio(\"";
            int starterIndex = html.IndexOf(mp3TextStarter);
            int realIndex = starterIndex + mp3TextStarter.Length;
            string mp3Url = "";
            while (html.Substring(realIndex, 1) != "\"")
            {
                mp3Url = mp3Url + html.Substring(realIndex, 1);
                realIndex++;
            }
            Debug.WriteLine("Word:" + word + ", URL; " + mp3Url);
            if (!mp3Url.EndsWith(".mp3"))
            {
                return false;
            }
            SetLog("Downloading from Iciba.com");
            SetLog("Mp3 URL: " + mp3Url);

            DownFile(mp3Url, Path.Combine(localPath, word + ".mp3"), true);
            stream1.Close();
            return true;
        }

        void DownFile(string fileUrl, string localPath, bool replace)
        {
            if (File.Exists(localPath) && !replace)
            {
                return;
            }

            try
            {
                HttpWebRequest webRequest2 = WebRequest.Create(new Uri(fileUrl)) as HttpWebRequest;
                Stream stream2 = webRequest2.GetResponse().GetResponseStream();//TODO:Don't use GetRequestStream() directly.
                StreamReader sr2 = new StreamReader(stream2);
                FileStream localFile = new FileStream(localPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
                StreamWriter writer = new StreamWriter(localFile);
                int bufferSize = 1024;
                byte[] buffer = new byte[bufferSize];
                int readcount = stream2.Read(buffer, 0, bufferSize);
                while (readcount > 0)
                {
                    localFile.Write(buffer, 0, readcount);
                    readcount = stream2.Read(buffer, 0, bufferSize);
                }
                localFile.Close();
                stream2.Close();               
            }
            catch (Exception)
            {                
                throw;
            }
         
        }

界面示例：

软件下载：

WordMp3Downloader.rar