/// <summary>
/// Inject a JavaScript element into the document head
/// </summary>
/// <param name="javaScript">the script code</param>
public void InjectJavaScript(string javaScript)
{
if (null == this.Document)
{
return;
}
try
{
HtmlElement headElement = this.Document.GetElementsByTagName("head")[0];
HtmlElement scriptElement = this.Document.CreateElement("script");
if (scriptElement == null)
{
return;
}
scriptElement.SetAttribute("type", "text/javascript");
// use the custom mshtml interface to append the script to the element
IHtmlScriptElement element = (IHtmlScriptElement)scriptElement.DomElement;
element.Text = "/* <![CDATA[ */ " + javaScript + " /* ]]> */";
headElement.AppendChild(scriptElement);
}
catch (InvalidOperationException ioex)
{
Debug.WriteLine("InjectJavascript: " + ioex, "GEWebBrowser");
}
}
private static async Task <string> DecodeResponse(IHtmlDocument htmlDocument, HttpClient httpClient, HttpResponseMessage httpResponseMessage)
{
string responseString = await httpResponseMessage.Content.ReadAsStringAsync();
string responseJson = string.Empty;
if (responseString.StartsWith("{"))
{
responseJson = responseString;
}
else
{
if (JintEngine == null)
{
IHtmlScriptElement appJsScript = htmlDocument.Scripts.FirstOrDefault(s => s.Source?.Contains("app.js") == true || s.Source?.Contains("app.min.js") == true);
string appJsSource = await httpClient.GetStringAsync(appJsScript.Source);
List <JavaScriptHelper.Function> functions = JavaScriptHelper.Parse(appJsSource);
JavaScriptHelper.Function readFunction = functions.FirstOrDefault(f => f.Name == "read");
JintEngine = new Engine();
JintEngine.Execute(readFunction.Body);
}
JsValue jsValue = JintEngine.Invoke("read", responseString);
responseJson = Encoding.UTF8.GetString(Convert.FromBase64String(jsValue.ToString()));
}
return(responseJson);
}
private static async Task <string> DecodeResponse(IHtmlDocument htmlDocument, HttpClient httpClient, HttpResponseMessage httpResponseMessage)
{
string responseString = await httpResponseMessage.Content.ReadAsStringAsync();
string responseJson = string.Empty;
if (responseString.StartsWith("{"))
{
responseJson = responseString;
}
else
{
lock (DecodeResponseLock)
{
if (JintEngine == null)
{
IHtmlScriptElement appJsScript = htmlDocument.Scripts.FirstOrDefault(s =>
s.Source?.Contains("app.js") == true ||
s.Source?.Contains("app.min.js") == true ||
s.Source?.Contains("app.obf.js") == true ||
s.Source?.Contains("app.obf.min.js") == true
);
Obfuscated = appJsScript.Source.Contains("obf.");
string appJsSource = httpClient.GetStringAsync(appJsScript.Source.Replace("obf.", string.Empty)).GetAwaiter().GetResult();
List <JavaScriptHelper.Function> functions = JavaScriptHelper.Parse(appJsSource);
JintEngine = new Engine();
JintEngine.Execute(functions.FirstOrDefault(f => f.Name == "read").Body);
if (Obfuscated)
{
Func <string, string> atob = str => Encoding.Latin1.GetString(Convert.FromBase64String(str));
JintEngine.SetValue("atob", atob);
JintEngine.Execute(functions.FirstOrDefault(f => f.Name == "gdidecode").Body);
}
}
JsValue jsValue = JintEngine.Invoke("read", responseString);
if (Obfuscated)
{
jsValue = JintEngine.Invoke("gdidecode", jsValue.ToString());
responseJson = jsValue.ToString();
}
else
{
responseJson = Encoding.UTF8.GetString(Convert.FromBase64String(jsValue.ToString()));
}
}
}
return(responseJson);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="scriptElement"></param>
public Javascript(IHtmlScriptElement scriptElement)
{
ScriptElement = scriptElement;
Content = scriptElement.Text;
}
/// <summary>
/// Converts AngleSharp Script to BrowseSharp Javascript
/// </summary>
/// <param name="scriptElement"></param>
/// <returns></returns>
private Javascript ConvertToJavascript(IHtmlScriptElement scriptElement)
{
Javascript javascript = new Javascript(scriptElement);
return(javascript);
}
