Appweb Specifications

The Appweb product includes the following components:

• Appweb HTTP Server program
• Appweb HTTP Client program
• Appweb HTTP Server library
• Appweb HTTP Client library
• HTTP Proxy
• ESP MVC web framework
• Secure Sockets Layer (SSL/TLS)
• FastCGI, CGI, File Upload, Directory Listing
• Documentation
• Samples
• Source code

Feature Overview

HTTP Server Engine

• HTTP/1.0, HTTP/1.1 support
• HTTP/2 support with multiplexing and header compression
• FastCGI with dynamic launching, multiplexing and restart
• HTTP reverse proxy
• Multithreaded, event based server
• Fast co-routine request pipeline
• Sendfile and vectored I/O
• Supports ranged, chunked and pipelined requests
• Supports transfer chunk encoding to preserve keep-alive
• Virtual Hosting: IP-based and Name-based
• Security defensive monitoring and counter-measures
• Error and access Logging (Common Log Format)
• Full request tracing
• Apache style configuration
• Service monitoring process
• Sand-box resource limits
• Response caching
• Web Sockets
• Fully configurable routing for human readable URLs
• Garbage collector to prevent memory leaks

Performance

• Request throughput (> 40,000 requests per second on PC)
• Multithreaded and event based
• Small memory footprint even under heavy load (from 1MB)

Modularity

• Dynamic loading of modules
• Modules available for for CGI, PHP, SSL
• Extensible modules and URL handlers
• Extensible / replaceable authorization, SSL and scripting

Security

• Secure Sockets Layer (SSL)
• Basic and Digest Authentication
• Directory and URL location based authorization
• Sandbox limits
• Access and access violation logging
• Safe portable runtime to protect against memory leaks and buffer overflows
• Defensive counter-measures

Dynamic Content

• ESP C-Language web framework
• CGI/1.1
• PHP

ESP C-Language Web Framework

• Model / View / Controller paradigm or stand-alone web pages
• SQLite database and in-memory databases with migrations
• Web page templating engine
• Embedded C-code in HTML pages
• Session and flash inter-request state management
• WebSockets APIs for dynamic content
• Transparent recompilation and reload

Developer Support

• HTTP server and client libraries
• Shared and static libraries supported
• Extensive C API
• Easy, intuitive programming model
• Extensive debug trace logging

Documentation

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

Platform Support

• Linux
• Windows
• MAC OS X
• FreeBSD, NetBSD
• FreeRTOS
• ESP-IDF
• QNX
• Quadros
• VxWorks

Embedding Support

• Supports ARM, MIPS, X86, X64, PPC, RiscV, SH, Sparc, TIDSP, Xtensa
• Full cross-compilation support. Use Windows, Linux or Mac as build system
• Fine-grained control for conditional build and compilation
• Build statically or shared

Other Features

• Binary Packaged installations for Windows and MAC OS X
• Run as a service / daemon

Standards

• HTTP/2
• HTTP/1.1
• CGI/1.1

Please read Licensing for further details.