32 lines
1.6 KiB
Markdown
32 lines
1.6 KiB
Markdown
# Tilde Friends in depth
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# Tilde Friends
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## Philosophy
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Tilde Friends is a platform for making, running, and sharing web applications.
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<!-- When you visit Tilde Friends in a web browser, you are presented with a
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terminal interface, typically with a big text output box covering most of the
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page and an input box at the bottom, into which text or commands can be
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entered. A script runs to produce text output and consume user input.
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The script is a Tilde Friends application, and it runs on the server, which
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means that unlike client-side JavaScript, it can have the ability to read and
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write files on the server or create network connections to other machines.
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Unlike node.js or other server-side runtime environments, applications are
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limited for security reasons to not interfere with each other or bring the
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entire server down.
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Above the terminal, an "Edit" link brings a visitor to the source code for the
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current Tilde Friends application, which they can then edit, save as their own,
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and run. -->
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## Architecture
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Tilde Friends is a C++ application with a JavaScript runtime that provides restricted access to filesystem, network, and other system resources.
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The core process runs a core set of scripts that implement a web server, typically starting a new process for each visitor's session which runs scripts for the active application and stopping it when the visitor leaves.
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Only the core process has access to most system resources, but session processes can be given accesss through the core process.
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Service processes are identical to session processes, but they are not tied to a user session.
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