Google 翻譯API Demo

接上篇 Google翻譯API(B/S調用和C/S調用)

     上篇里提到的接口調用方法是get方式，這樣有個問題，每次請求翻譯的內容不能超過url允許的長度。需要改成post方式才行，但是google沒有提供post方式的API請求，怎么辦呢？在通過網上一番資料的查找，在一位哥們的博客里看到了解決方案，不過他用的是java版的，對應post地址和參數，寫出了.net版的。加上朗讀的功能，程序界面如下：

/// <summary> /// Post方式獲取翻譯 /// </summary> /// <param name="sourceText"></param> /// <param name="langPair"></param> /// <returns></returns> private static string TranslatePostMethod(string sourceText, string langPair) { string fromLan = langPair; //原始語言 string toLan = langPair.ToLower() == "zh" ? "en" : "zh"; //目標語言 這里只針對中英互轉 HttpWebRequest requestScore = (HttpWebRequest)WebRequest.Create("http://translate.google.com/translate_t#"); StringBuilder postContent = new StringBuilder(); Encoding myEncoding = Encoding.UTF8; postContent.Append(HttpUtility.UrlEncode("hl", myEncoding)); postContent.Append("="); postContent.Append(HttpUtility.UrlEncode("en", myEncoding)); postContent.Append("&"); postContent.Append(HttpUtility.UrlEncode("ie", myEncoding)); postContent.Append("="); postContent.Append(HttpUtility.UrlEncode("UTF-8", myEncoding)); postContent.Append("&"); postContent.Append(HttpUtility.UrlEncode("sl", myEncoding)); postContent.Append("="); postContent.Append(HttpUtility.UrlEncode(fromLan, myEncoding)); postContent.Append("&"); postContent.Append(HttpUtility.UrlEncode("text", myEncoding)); postContent.Append("="); postContent.Append(HttpUtility.UrlEncode(sourceText, myEncoding)); postContent.Append("&"); postContent.Append(HttpUtility.UrlEncode("tl", myEncoding)); postContent.Append("="); postContent.Append(HttpUtility.UrlEncode(toLan, myEncoding)); byte[] data = Encoding.ASCII.GetBytes(postContent.ToString()); requestScore.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; requestScore.Method = "Post"; //requestScore.ContentType = "application/x-www-form-urlencoded;charset=gb2312"; requestScore.ContentLength = data.Length; requestScore.KeepAlive = true; requestScore.Timeout = (6 * 60 * 1000); requestScore.ProtocolVersion = HttpVersion.Version10; Stream stream = requestScore.GetRequestStream(); stream.Write(data, 0, data.Length); stream.Close(); string content = string.Empty; try { System.Net.ServicePointManager.Expect100Continue = false; HttpWebResponse responseSorce = (HttpWebResponse)requestScore.GetResponse(); StreamReader reader = new StreamReader(responseSorce.GetResponseStream()); content = reader.ReadToEnd(); responseSorce.Close(); reader.Dispose(); stream.Dispose(); } catch (WebException ex) { HttpWebResponse responseSorce = (HttpWebResponse)ex.Response;//得到請求網站的詳細錯誤提示 StreamReader reader = new StreamReader(responseSorce.GetResponseStream()); content = reader.ReadToEnd(); responseSorce.Close(); reader.Dispose(); stream.Dispose(); } finally { requestScore.Abort(); } string reg = @"<(?<HtmlTag>[\w]+)[^>]*\s[iI][dD]=(?<Quote>[""']?)result_box(?(Quote)\k<Quote>)[""']?[^>]*>((?<Nested><\k<HtmlTag>[^>]*>)|</\k<HtmlTag>>(?<-Nested>)|.*?)*</\k<HtmlTag>>"; //返回的是一個html頁面，需匹配出翻譯內容 Regex r = new Regex(reg); MatchCollection mcItem = r.Matches(content); string result = ConvertHtmlToText(mcItem[0].Value); return "post:" + result; }

可執行程序下載：http://download.csdn.net/source/3499399

源代碼下載：http://download.csdn.net/source/3499392

參考資料：

1.Google翻譯post提交無長度限制的在線翻譯例子

2.使用正則表達式匹配嵌套Html標簽

3.使用正則表達式將Html轉換為純文本