CODEWITHSUNDEEP
javaandroidgeckoview
Zappy.Mans
Zappy.Mans

Reputation: 672

How to get a web page source code with GeckoView

I am an android developer and I knew about GeckoView recently. I can get source code of a web page by android WebView (java code).

However with my new website, android Webview can't load the webpage but GeckoView can. Now I want to get source code of a web page by GeckoView. Is there any body know the solution to resolve this problem ?

Thank in advance

Upvotes: 0

Views: 796

Answers (3)

cartoon cartel
cartoon cartel

Reputation: 1

By webpage source code, do you mean the html? If so, you can use a combination of an interface to grab the code on completion and the GeckoWebExecutor's resulting input stream. Assuming you want the html as a string, you would do something similar:

public void getHtml(String url) {
    GeckoWebExecutor executor = new GeckoWebExecutor(geckoRuntime);
    final GeckoResult<WebResponse> result = executor.fetch(
                new WebRequest.Builder(url)
                        .header("Accept", ".html")
                        .build());

    if(result != null){
        result.then(response -> {
            String htmlAsText = convertStreamToString(response.body);
            return htmlAsText;
        });
    }
}

public String convertStreamToString(InputStream is){
    if (is == null){
            return null;
    }
    try (BufferedReader reader = new BufferedReader(
        new InputStreamReader(is, StandardCharsets.UTF_8))) {
            StringBuilder sb = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
            return sb.toString();
        }
        catch (IOException e) {
            //do better error handling
            return null;
        }
    }
}

Upvotes: 0

Silvio Tamaso D&#39;Onofrio
Silvio Tamaso D&#39;Onofrio

Reputation: 3149

One option for doing this could follow these steps:

  1. detect which page my geckoview loaded;
  2. save the loaded url into a sharedpref;
  3. if user wants to see the source of the page, load the url saved within that sharedpref.

So...

(1-2) as you already know, geckoview doesn't have that handy shouldOverrideUrlLoading() method, so you will have to deal with the NavigationDelegate class, which has the onLocationChange(), where i put this line, which does nothing more than save the current url as a string into a sharedpref string named "geckoViewUrl":

sharedprefs.edit().putString("geckoViewUrl", url).apply();

having all setup before (sharedprefs etc). Detected the loaded page and saved the url into a sharedpref, let's go to the final step 3.

(3) for my use, wishing only to allow the user to see (and copy) the source, for the law of the minimum effort i used another activity with a plain and old webview to display it. This is very easy to implement and rises no confusion to the user. He/She wants to see the code, i show it in another activity. When it's done, he/she closes the new activity and life continues.

So, user wants source? Load another activity with a webview and make it load that saved sharedpref string:

addr2open = pref_out.getString("geckoViewUrl", "");

Doing this (for example), you get the url user wants to see source assigned to a string var. To finish, all you have to do is to make the webview load this string preceded by the precious word view-source:, this way:

webView.loadUrl("view-source:" + addr2open);

That's it. Of course you could implement a solution relying on the same activity, or using geckoView, showing multiple options, menus etc. I only wanted to show you a way to solve your problem in a nice 'n' easy way. You asked for "How to get a web page source code with GeckoView". Here is the answer. Works perfectly. If this is good for you, please, accept this as the correct answer. Thank you. Happy coding.

One example on the use of "view-source", from the creators of GeckoView: https://firefox-source-docs.mozilla.org/devtools-user/view_source/index.html (see item "Link to a line number").

Upvotes: 0

Siarl
Siarl

Reputation: 54

As far as I know, you cannot use GeckoView to get the source code, but the geckoview library does have GeckoWebExecutor. Take a look at the fetch method and the WebResponse it returns.

By converting the WebResponse.body InputStream to a String you can get the source code.

Upvotes: 1

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