Javascript从外部网页获取文本

Question

I have looked for a long time but I haven't been able to find a simple solution. On my webpage I want to input an address which will be looked up by a website which returns a webpage where in the text the username I need is located.

https://id.ripple.com/v1/user/ + the username inputed. It would open the page like https://id.ripple.com/v1/user/rUkUchFYfvjucGtGDtSV2avQCzmJrktkVw where there will be a username parameter containing sashadkiselev. I want to be able to make a function which takes the address opens that webpage retrieves the username and shows it in a pop up box.

Answer 1

As redundant as your request seems, if you are using jQuery, you can have the following code to do what you want:

$(function () {
    function getUsername(username, callback) {
        $.getJSON('https://id.ripple.com/v1/user/' + username, function (data) {
            callback.call(data, data.username);
        });
    }

    getUsername('sashadkiselev', function (username) {
        alert('Username is: ' + username);
        // the rest of the data is also available as "this"
    });
});

Note that the ability to pass a function as the callback parameter to getUsername() allows you to easily customise what you do with the username.