Apache HTTP Server

Apache HTTP Server
The Apache Software Foundation · Apache License 2.0 · source
Name	Apache HTTP Server
Developer	Apache Software Foundation
Initial release	1995
Operating system	Cross-platform
Language	C (programming language), XML
Genre	Web server
License	Permissive free software

Apache HTTP Server is a free and open-source web server software developed and maintained by the Apache Software Foundation, a non-profit organization founded by Brendan Eich, Brian Behlendorf, and Cliff Skolnick. The server is widely used by organizations such as Google, Amazon, and Microsoft due to its reliability, flexibility, and customizability, as well as its compatibility with various operating systems, including Linux, Windows, and macOS. The server's popularity can be attributed to its ability to handle a large number of concurrent connections, making it a popular choice for high-traffic websites, such as those of Facebook, Twitter, and YouTube. Additionally, the server's modular design allows for easy integration with other Apache Software Foundation projects, such as Apache Tomcat and Apache Kafka.

Introduction

The Apache HTTP Server is a crucial component of the LAMP (software bundle), which also includes Linux, MySQL, and PHP, and is widely used by web developers and administrators, including those at IBM, Oracle, and Red Hat. The server's flexibility and customizability have made it a popular choice for a wide range of applications, from small personal websites to large-scale enterprise deployments, such as those used by NASA, NASA Jet Propulsion Laboratory, and CERN. The server's support for various protocols, including HTTP/1.1, HTTP/2, and WebSocket, makes it an ideal choice for real-time web applications, such as those used by Netflix, Uber, and Airbnb. Furthermore, the server's integration with other Apache Software Foundation projects, such as Apache Cassandra and Apache HBase, makes it a popular choice for big data and analytics applications, such as those used by Palantir Technologies and SAP SE.

History

The Apache HTTP Server was first released in 1995 by Rob McCool, a developer at the National Center for Supercomputing Applications (NCSA), and was initially based on the NCSA HTTPd server. The server quickly gained popularity due to its reliability, flexibility, and customizability, and became one of the most widely used web servers on the internet, used by organizations such as Harvard University, Stanford University, and MIT. In 1999, the Apache Software Foundation was established to oversee the development and maintenance of the server, which has since become one of the most popular open-source software projects, with contributions from developers at Intel, Cisco Systems, and VMware. The server has undergone significant changes over the years, including the addition of new features and improvements to its performance and security, such as those made by Mark Zuckerberg and Linus Torvalds.

Features

The Apache HTTP Server includes a wide range of features that make it a popular choice for web developers and administrators, including support for SSL/TLS encryption, virtual hosting, and URL rewriting, as well as integration with other Apache Software Foundation projects, such as Apache Struts and Apache Axis. The server also includes a range of modules and extensions, such as mod_php and mod_perl, which provide support for popular programming languages, such as PHP and Perl, used by developers at Zend Technologies and ActiveState. Additionally, the server's support for WebDAV and FTP makes it an ideal choice for file sharing and collaboration applications, such as those used by Dropbox and Box (company).

Architecture

The Apache HTTP Server is designed to be highly modular and flexible, with a architecture that allows for easy customization and extension, using technologies such as Apache Portable Runtime and Apache Commons. The server's core components include the httpd process, which handles incoming requests and sends responses, as well as a range of modules and extensions that provide additional functionality, such as mod_proxy and mod_cache, used by organizations such as Akamai Technologies and Cloudflare. The server's modular design makes it easy to add or remove modules and extensions as needed, allowing developers to customize the server to meet their specific needs, such as those of Salesforce.com and SAP SE.

Configuration

The Apache HTTP Server is highly configurable, with a range of options and settings that can be used to customize its behavior, using configuration files such as httpd.conf and apache2.conf, and tools such as Apache Configuration Tool and Webmin. The server's configuration files can be used to set options such as the server's port number, document root, and error log location, as well as to configure modules and extensions, such as mod_ssl and mod_rewrite, used by developers at Red Hat and Canonical Ltd.. Additionally, the server's support for environment variables and conditional configuration makes it easy to customize its behavior based on factors such as the client's IP address and user agent, such as those used by Google Analytics and Adobe Analytics.

Security

The Apache HTTP Server includes a range of security features that make it a popular choice for high-security applications, including support for SSL/TLS encryption, access control lists (ACLs), and authentication and authorization modules, such as mod_auth and mod_authnz_ldap, used by organizations such as US Department of Defense and NASA. The server's support for HTTPS and TLS makes it an ideal choice for applications that require secure communication, such as those used by PayPal and Stripe (company). Additionally, the server's regular security updates and patches make it a popular choice for applications that require high levels of security, such as those used by Bloomberg L.P. and Thomson Reuters. The server's security features are also used by other Apache Software Foundation projects, such as Apache Knox and Apache Ranger, to provide secure access to data and applications.

Category:Web servers