I'm pretty new/bad with regex-patterns, but this is what I want:
I've got a webpage with html, and somewhere on that page I have: <input name="__RequestVerificationToken" type="hidden" value="the_value_I_want" />
So, my question is: How can I get the value (the_value_I_want) of the hidden text field in Android?
I did make the HttpGet already (see code below), I just need to know the correct Pattern for this.
Code:
// Method to get the hidden-input value of the Token
private String getToken(){
String url = "http://myhost/Account/Login";
String hidden_token = "";
String response = "";
HttpGet get = new HttpGet(url);
try{
// Send the GET-request
HttpResponse execute = MainActivity.HttpClient.execute(get);
// Get the response of the GET-request
InputStream content = execute.getEntity().getContent();
BufferedReader buffer = new BufferedReader(new InputStreamReader(content));
String s = "";
while((s = buffer.readLine()) != null)
response += s;
}
catch(Exception ex){
ex.printStackTrace();
}
// Get the value of the hidden input-field with the name __RequestVerificationToken
Pattern pattern = Pattern.compile("<input name=\"" + TOKEN + "\" type=\"hidden\" value=\".\" />", Pattern.DOTALL);
Matcher matcher = pattern.matcher(response);
while(matcher.find())
hidden_token = matcher.group();
return hidden_token;
}
So, what should I replace the following line with?
Pattern pattern = Pattern.compile("<input name=\"" + TOKEN + "\" type=\"hidden\" value=\".\" />", Pattern.DOTALL);
Or should I also change something else?
Thanks in advance for the responses.
PS: For those wondering: I need this token to be able to Log-in using a Google-account with a POST-request, combined with the token I got from a Cookie.
Edit 1:
After reading the answer of this stackoverflow question I think it's better to not use a regex-pattern for the HTML page. Does anyone know a better solution (I would appreciate it if this better solution would be with a code sample).
Edit 2:
I tried using Illegal Argument's answer and added the Jsoup library. I did indeed manage to get the token by making the following changes to my code above:
Replace everything in the try { ... } with:
// Get the value of the hidden input-field with the name __RequestVerificationToken
Document doc = Jsoup.connect(url).get();
org.jsoup.nodes.Element el = doc.select("input[name*=" + TOKEN).first();
hidden_token = el.attr("value");
This does indeed get me the token of the hidden field, but now I have an entire new problem.. The token changed, because Jsoup opens a new session. So basically I can't use the Jsoup and are "forced" to use the already open DefaultHttpClient that I also use for the POST.
I will make a new question for this though, since my original answer was just bad questioning by myself (not providing all the details) and so I accept Illegal Argument's answer as the correct one (though it didn't solved my current problem, it might help others).
