要得到tk只需要，运行tk这个函数，它有两个输入值：a为翻译文本内容，TKK是上文正则匹配得到的JS字符串执行的结果值。为方便在C#中执行JS，封装了一个能执行JS的函数，如下：
/// <summary>
/// 执行JS
/// </summary>
/// <param name="sExpression">参数体</param>
/// <param name="sCode">JavaScript代码的字符串</param>
/// <returns></returns>
private string ExecuteScript(string sExpression, string sCode)
{
MSScriptControl.ScriptControl scriptControl = new MSScriptControl.ScriptControl();
scriptControl.UseSafeSubset = true;
scriptControl.Language = "JScript";
scriptControl.AddCode(sCode);
try
{
string str = scriptControl.Eval(sExpression).ToString();
return str;
}
catch (Exception ex)
{
string str = ex.Message;
}
return null;
}
3、实现翻译的完整代码
/// <summary>
/// 谷歌翻译
/// </summary>
/// <param name="text">待翻译文本</param>
/// <param name="fromLanguage">自动检测：auto</param>
/// <param name="toLanguage">中文：zh-CN，英文：en</param>
/// <returns>翻译后文本</returns>
public string GoogleTranslate(string text, string fromLanguage, string toLanguage)
{
CookieContainer cc = new CookieContainer();
string GoogleTransBaseUrl = "https://www.easck.com/";
var BaseResultHtml = GetResultHtml(GoogleTransBaseUrl, cc, "");
Regex re = new Regex(@"(?<=TKK=)(.*?)(?=);)");
var TKKStr = re.Match(BaseResultHtml).ToString() + ")";//在返回的HTML中正则匹配TKK的JS代码
var TKK = ExecuteScript(TKKStr, TKKStr);//执行TKK代码，得到TKK值
var GetTkkJS = File.ReadAllText("./gettk.js");
var tk = ExecuteScript("tk(""+text+"",""+TKK+"")", GetTkkJS);
string googleTransUrl = "https://www.easck.com/translate_a/single?client=t&sl="+fromLanguage+"&tl="+toLanguage+"&hl=en&dt=at&dt=bd&dt=ex&dt=ld&dt=md&dt=qca&dt=rw&dt=rm&dt=ss&dt=t&ie=UTF-8&oe=UTF-8&otf=1&ssel=0&tsel=0&kc=1&tk="+tk+"&q="+HttpUtility.UrlEncode(text);
var ResultHtml = GetResultHtml(googleTransUrl, cc, "https://www.easck.com/");
dynamic TempResult = Newtonsoft.Json.JsonConvert.DeserializeObject(ResultHtml);
string ResultText = Convert.ToString(TempResult[0][0][0]);
return ResultText;
}
public string GetResultHtml(string url,CookieContainer cc,string refer)
{
var html="";
var webRequest = WebRequest.Create(url) as HttpWebRequest;
webRequest.Method = "GET";
webRequest.CookieContainer = cookie;
webRequest.Referer = referer;
webRequest.Timeout = 20000;
webRequest.Headers.Add("X-Requested-With:XMLHttpRequest");
webRequest.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
webRequest.UserAgent = useragent;
using (var webResponse = (HttpWebResponse)webRequest.GetResponse())
{
using (var reader = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8))
{
html = reader.ReadToEnd();
reader.Close();
webResponse.Close();
}
}
return html;
}
/// <summary>
/// 执行JS
/// </summary>
/// <param name="sExpression">参数体</param>
/// <param name="sCode">JavaScript代码的字符串</param>
/// <returns></returns>
private string ExecuteScript(string sExpression, string sCode)
{
MSScriptControl.ScriptControl scriptControl = new MSScriptControl.ScriptControl();
scriptControl.UseSafeSubset = true;
scriptControl.Language = "JScript";
scriptControl.AddCode(sCode);
try
{
string str = scriptControl.Eval(sExpression).ToString();
return str;
}
catch (Exception ex)
{
string str = ex.Message;
}
return null;
}
