Template engine

As explained in Rust Servers, Services, and Apps

A template engine is a software component that combines templates with data to generate rendered output such as HTML.

A template engine combines a template file with data supplied by a web application to generate HTML. The data can be loaded on demand and tailored to the requesting user, producing a dynamic page from a reusable template. section 7.1

Figure 7.1 Server-side rendering of web pages

Shows how templates fit into server-side rendering to produce web pages. section 7.1

In a server-rendered Rust application, templates work alongside the web framework and request-handling code:

• The application passes data to the template engine, which embeds it in the template and generates HTML. section 7.1
• Routes and handlers process HTTP requests; handlers can render templates and return the resulting pages. section 8.4
• Tera template variables can provide form feedback, while handlers can re-render a form with an error message. section 8.4

Tutor registration

A Tera-backed registration form can display fields for a username, password, tutor name, image URL, and profile. If submitted data has an error, the handler can render the form again with a suitable message. section 8.0 section 8.4

How Rust Servers, Services, and Apps covers it

How deep it goes

Defines template input, HTML output, and embedded data, then relates templates to routes, handlers, and persistence.

Examples

Uses a tutor-registration form with user fields and template-rendered validation feedback.

What you can do after

Apply Tera with Actix Web to render dynamic pages and forms, process submissions, and return user feedback.

How it connects

Connects server-side rendering with Tera, Actix Web, HTML forms, request handlers, routes, and database access.

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Also explained in

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  Acing the Certified Kubernetes Administrator Exam, Second EditionA template engine is software that generates configuration or other output by substituting values into a parameterized template.
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  Spring in Action, Sixth EditionA view template library is a software library that processes templates to generate rendered web views.

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Related concepts

• Teraincludes · Tera is a Rust template-engine library for generating text output, including HTML, from templates and supplied data.
• Thymeleafincludes · Thymeleaf is a Java server-side template engine for generating HTML, markup, and other text-based documents from templates and model data.
• librarykind of · A software library is a reusable collection of code or components that other programs can incorporate or invoke to provide functionality.
• server-side renderingused by · A web-rendering technique in which a server generates a user interface’s markup or other rendered representation before delivering it to a client.
• HTMLproduces · HTML (HyperText Markup Language) is the standard markup language for structuring content and elements in web documents.
• TEMPLATES settingconfigured by · The TEMPLATES setting is the Django settings configuration that selects template engines and controls where template files are searched for.

This explainer was generated by Manning's knowledge graph from the text of Rust Servers, Services, and Apps. The section links point to the parts of the book it draws on.