Embedthis ESP™ Features

ESP includes the following components:

• C Language web framework
• Model-View-Controller support
• Application and scaffold generator
• HTTP/1.1 and HTTP/2 server and client
• Documentation
• Samples
• Source code

Feature Overview

Web Framework

• Web page templates with inline C-code
• Full support for Single Page Applications like VueJS
• Transparent recompilation and browser triggered reload
• MVC web framework
• RESTful URI mapping and routing
• MDB and SQLite databases
• Session and cookie management
• Response caching
• JSON parser for JSON requests and responses
• AJAX and async request support
• WebSockets for full-duplex communications
• Integrated with Expansive for templating and tooling.
• Library of extension packages via Pak for package management.
• Library of application skeletons for specific environments.

Content Generation

• Quick-start application skeletons
• Install packages from a large library of ESP and 3rd party packages via the Pak Manager
• Scaffold generator
• Database migration generation and management
• Client side asset minimization and compression
• Batch compilation

HTTP Engine

• Based on the Embedthis HTTP Engine used in Appweb
• HTTP/1.1 and HTTP/2 support
• IPv4 and IPv6
• Multithreaded, event-based server
• Fast co-routine request pipeline
• RESTful request routing with regular expression matching and rewriting
• Supports ranged, chunked and pipelined requests
• Efficient transmission via sendfile and vectored I/O
• Sand-box resource limits
• Monitoring and defensive counter-measures

Performance

• Request throughput (> 40,000 requests per second on PC class system)
• Multi-threaded, event-based core
• Small memory footprint even under heavy load (from 1MB)

Modularity

• Dynamic loading and reloading of applications, pages and controllers
• Configurable request routing
• Extensible/replaceable authorization and SSL

Security

• Secure Sockets Layer (SSL)
• Basic and Digest Authentication
• Route based authorization
• User authentication and role-based security
• XSRF tokens to minimize CSRF threats
• Sandbox limits
• Access and access violation logging
• Safe portable runtime to protect against buffer overflows
• Garbage collector to eliminate memory leaks

Developer Support

• Extensive C API
• Extensive debug trace logging

Documentation

• Full C API Documentation
• Guides and programmer reference
• Cookbook of samples (cut and paste to get going)
• Tutorials

Platform Support

• Linux (4 and later)
• Windows (10 and later)
• Mac OSX (10.10 and later)
• VxWorks (6.X and 7.X)
• Free BSD (10.X)
• Packaged installations for Windows and Mac OSX

Embedding Support

• Supports Arm, Mips, X86, X64 and Sparc processors
• Full cross-compilation support. Use Windows, Linux or Mac as build system
• Fine-grained control for conditional build and compilation