100 lines
3.1 KiB
Markdown
100 lines
3.1 KiB
Markdown
**libravatarserv** is a simple [libravatar](https://www.libravatar.org/) server.
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It is intended to be used as a
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[CGI](https://en.wikipedia.org/wiki/Common_Gateway_Interface) program.
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Libravatar is a free service and an open specification for hosting profile
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images tied to email or OpenID addresses.
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## Features
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* Avatar delivery based on email addresses
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* Default avatar for unknown addresses
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* MD5 hashes
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* SHA256 hashes
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* Variable image size (`s` or `size`)
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* Default actions (`d` or `default`): 404, URL
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The default behaviour for unknown users is to return a 404 error. If a default
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image is put in the avatar directory, that is returned instead. The default
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image can not be overriden by adding the parameter `d` or `default` to the URL.
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Clients are asked to cache results for up to 1 day to reduce load. This can
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apply to negative results as well.
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The API is explained in greater detail at the
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[Libravar wiki](https://wiki.libravatar.org/api/).
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## Usage
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Install nginx and
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[fcgiwrap](https://www.nginx.com/resources/wiki/start/topics/examples/fcgiwrap/),
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copy the [example config](https://schlomp.space/tastytea/libravatarserv/src/branch/master/doc/nginx-example.conf) to the nginx configuration directory and edit it
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according to your needs. Other webservers and cgi spawners will also work, of
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course.
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Add the following DNS records to your nameserver:
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```PLAIN
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_avatars._tcp.example.com. IN SRV 0 0 80 avatars.example.com
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_avatars-sec._tcp.example.com. IN SRV 0 0 443 avatars.example.com
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```
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`_avatars._tcp.example.com` is for HTTP, `_avatars-sec._tcp.example.com` is for
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HTTPS.
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libravatarserv looks in each of `${XDG_DATA_DIRS}` for a directory named
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`libravatarserv`. You can force a different directory by setting the environment
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variable `${AVATAR_DIR}`.
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The image files are named like your email address, no file extension. If you
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want to deliver a default image for unknown email addresses, name it `default`.
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Test your setup on https://www.libravatar.org/tools/check/.
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### Example
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The avatar directory could look like this:
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```PLAIN
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/usr/share/libravatarserv
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├── [ 32K] default
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├── [ 759] user@example.com
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└── [ 16] user+newsletter@example.com -> user@example.com
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```
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## Install
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### Dependencies
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* C++ compiler (tested: [gcc](https://gcc.gnu.org/) 5/6/7/8,
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[clang](https://llvm.org/) 5/6)
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* [cmake](https://cmake.org/) (at least 3.2)
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* [crypto++](https://cryptopp.com) (tested: 7.0 / 5.6)
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* [imagemagick](https://www.imagemagick.org/) (tested: 7.0 / 6.9)
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* [libxdg-basedir](http://repo.or.cz/w/libxdg-basedir.git) (tested: 1.2)
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### Compile
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```SH
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mkdir build
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cd build
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cmake ..
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make
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make install
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```
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## Contributing
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Contributions are always welcome. You can submit them as pull requests or via
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email to `tastytea`@`tastytea.de`.
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## Contact
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See https://tastytea.de/
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## License & Copyright
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```PLAIN
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Copyright © 2018 tastytea <tastytea@tastytea.de>.
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License GPLv3: GNU GPL version 3 <https://www.gnu.org/licenses/gpl-3.0.html>.
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This program comes with ABSOLUTELY NO WARRANTY. This is free software,
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and you are welcome to redistribute it under certain conditions.
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```
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