ESP^™ Specifications

The ESP product includes the following components:

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

Feature Overview

Web Framework

• MVC web framework
• MDB and SQLite databases
• RESTful URI mapping and routing
• Transparent recompilation and reload (browser reload triggered)
• Session and cookie management
• Web page templates with inline C-code and master layout pages
• Response caching
• JSON parser supporting JSON requests and responses
• AJAX and async request support
• AngularJS support
• Integrated with the Pak package manager for zero-configuration use of client libraries

Content Generation

• Application generator
• Scaffold generator
• Database migration generation and management
• Library of extensions via the Pak package manager and catalog
• Client side asset minimization and compression
• Batch compilation
• Packaging applications into single executable

Appweb HTTP Engine

• Full HTTP/1.1 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
• Virtual Hosting. IP-based and Name-based
• Error and access Logging (Common Log Format)
• Flexible JSON configuration
• Sand-box resource limits
• Monitoring and defensive counter-measures

Performance

• Request throughput (> 40,000 requests per second on Macbook Pro)
• Multi-threaded, event-based core for scale and blocking requests
• 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
• Online community support forum

Documentation

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

Platform Support

• Linux (2.6 and later)
• Windows (7 and later)
• Mac OSX (10.7 and later)
• VxWorks (6.X)
• Free BSD (10.X)
• Packaged installations for Windows and MAC OSX

Embedding Support

• Supports ARM, MIPS, X86, PPC and Sparc processors
• Full cross-compilation support. Use Windows, Linux or Mac as build system
• Fine-grained control for conditional build and compilation
• Execute from ROM (XIP)