Wt – C++ Web Toolkit

Widget library

Many widgets are included in Wt. For every HTML element there's a corresponding widget. These widgets can emit signals when interacted with, so you can write web applications like desktop applications. Check out the widget gallery for an overview of the widgets that Wt has to offer.

Server side, client optimized

Wt employs a signal-slot system. Instead of worrying about the sending of Ajax requests and serving of pages, you can simply connect the click of a button to a callback function on the server. Take a look at this example in the widget gallery. Wt will use whatever technology available for communication: Ajax or WebSockets, but will fall back on full HTML page loads when JavaScript is unavailable. This makes Wt applications accessible to any browser or web crawler.

Built-in security

Wt automatically protects against misuse by only allowing visible and enabled widgets to be interacted with. This also helps to avoid CSRF attacks, which are doubly avoided because Wt does not store session information in cookies. By using the widget abstraction, Wt discourages the inserting of raw HTML into a web page, preventing XSS attacks. Wt::Dbo prevents SQL injection by encouraging the use of prepared statements when accessing the database. Wt also includes an authentication and registration system with support for OAuth providers like Google, Facebook, and OpenID Connect.

PDF rendering

Create PDFs and render HTML as PDF with Wt's PDF rendering system. Check out PDF rendering in the widget gallery.

2D and 3D painting system

Use a single 2D drawing API with many backends (PNG, JPEG, SVG, HTML canvas, VML, and PDF) so you only need to write your drawing code once to support any web browser and save to many formats. Write server-side (OpenGL) and client-side (WebGL) 3D graphics with a uniform API. Wt's 2D and 3D charting libraries were built on top of this graphics API. Check out the examples in the widget gallery.

Object relational mapping library

Map classes in C++ to tables in your database with Wt::Dbo, an ORM that only requires pure C++, and does not rely on preprocessor magic or code generation. Get a taste for Wt::Dbo with the introductory tutorial.

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