Android的 - 正则表达式，模式的隐藏的HTML输入字段的值

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问题描述

我是pretty新/坏的正则表达式-模式，但是这就是我想要的：

I'm pretty new/bad with regex-patterns, but this is what I want:

我已经得到了与HTML网页，以及地方，页面我有：＆LT;输入名称=__ RequestVerificationToken类型=隐藏值=the_value_I_want/＆GT;

I've got a webpage with html, and somewhere on that page I have: <input name="__RequestVerificationToken" type="hidden" value="the_value_I_want" />

所以，我的问题是：我如何才能获得价值（the_value_I_want）的隐藏文本字段在的Android

So, my question is: How can I get the value (the_value_I_want) of the hidden text field in Android?

我没有让 HTTPGET 已经（见code以下），我只需要知道正确的模式这一点。

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;
}

那么，我应该替换以下行？

So, what should I replace the following line with?

模式模式= Pattern.compile（＆LT;输入名字= \\+ TOKEN +\\型= \\隐藏\\价值= \\ /＆GT\\;， Pattern.DOTALL）;

或者我应该也会改变别的东西？

Or should I also change something else?

在此先感谢您的答复。

PS：对于那些想知道：我需要这个令牌能够登录，使用具有一个谷歌账户在 POST请求，用<$ C合并$ C>标记从我得到了一个饼干。

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.

编辑1：

阅读的答案this计算器问题我认为这是最好不要使用正则表达式图案的HTML页面。有谁知道一个更好的解决方案（我想AP preciate它，如果这更好的解决办法是用code样品）。

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).

编辑2：

我试图使用非法参数的答案，并增加了Jsoup库。我确实管理通过了如下修改我的code以上获得令牌：

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:

替换尝试一切{...}有：

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");

这确实让我隐藏字段的象征，但现在我有一个全新的问题..令牌改变，因为Jsoup打开一个新的会话。所以基本上我不能使用Jsoup和被迫使用已打开DefaultHttpClient，我也使用了POST。

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.

我会为这个新的问题虽然，因为我原来的答复只是不好追问我自己（而不是提供所有的细节），所以我接受非法参数的回答是正确的（虽然它并没有解决我目前的的问题，它可能会帮助别人）。

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).

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Android的 - 正则表达式，模式的隐藏的HTML输入字段的值

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