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twtxt registry server

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## Archived
I'm well into a ground-up rewrite, so don't use this.
When it goes public, it will be at: [gbmor/getwtxt-ng](https://github.com/gbmor/getwtxt-ng)

# getwtxt
[![builds.sr.ht status](https://builds.sr.ht/~gbmor/getwtxt.svg)](https://builds.sr.ht/~gbmor/getwtxt?)
[![Build Status](https://travis-ci.com/getwtxt/getwtxt.svg?branch=master)](https://travis-ci.com/getwtxt/getwtxt)
[![Go Report Card](https://goreportcard.com/badge/github.com/getwtxt/getwtxt)](https://goreportcard.com/report/github.com/getwtxt/getwtxt)
[![Code Climate Maintainability](https://api.codeclimate.com/v1/badges/0e48bd9002de0f84b24e/maintainability)](https://codeclimate.com/github/getwtxt/getwtxt/maintainability)

twtxt registry written in Go!

[twtxt](https://github.com/buckket/twtxt) is a decentralized microblogging platform
for hackers based on text files. The user is "followed" and "mentioned" by referencing
the URL to their `twtxt.txt` file and a nickname.

Registries are designed to aggregate several users' statuses into a single location,
facilitating the discovery of new users to follow and allowing the search of statuses
for tags and key words.

<table style="width: 100%; text-align: center; margin: 0 auto; border: 0px;">
  <tr>
    <td>[<a href="#installation">Installation</a>]</td>
    <td>[<a href="#upgrading">Upgrading</a>]</td>
    <td>[<a href="#configuration">Configuration</a>]</td>
    <td>[<a href="#using-the-registry">Using the Registry</a>]</td>
    <td>[<a href="#benchmarks">Benchmarks</a>]</td>
    <td>[<a href="#other-documentation">Other Documentation</a>]</td>
    <td>[<a href="#notes">Notes</a>]</td>
  </tr>
</table>

## Features

* Easy to set up
* Uses an in-memory cache to serve requests
* Pushes to a database at a configurable interval for persistent storage
  * `leveldb (default)`
  * `sqlite3`
* Easily run behind `nginx`, `Caddy` or another HTTP server.

## Public Instances

* [twtxt.tilde.institute](https://twtxt.tilde.institute)
* [twtxt.envs.net](https://twtxt.envs.net/)

Would you like your instance listed? Send a message to the [mailing list](https://lists.sr.ht/~gbmor/getwtxt)!

## Installation

I have tested getwtxt on the following:
* `Debian 9, 10`
* `Ubuntu Server 18.04LTS, 18.10, 19.04`
* `OpenBSD 6.6`

Build dependencies are minimal, and only include:
* `make`
* `go >= 1.11`
* `git`

First, fetch the sources using `git` and jump into the directory.

```
$ git clone https://git.sr.ht/~gbmor/getwtxt
...
$ cd getwtxt
```

Then, check out the latest release tag.

```
$ git checkout $(git describe --tags --abbrev=0)
```

Use `make` to initiate the build and install process.
```
$ make
...
$ sudo make install
```

## Upgrading

Upgrading is nearly a identical process. Pull the changes, check out the
latest tag, and rebuild.

systemd might yell at you about running `systemctl daemon-reload` when you
go to restart getwtxt.

While getwtxt is pre-`1.0`, any patch-level updates (`v0.4.x`) will not
change configuration values. If a minor version increase has happened, for
example `v0.4.x -> v0.5.x`, then check if you need to update the config
file before restarting getwtxt.

## Configuration

\[ [Proxying](#proxying) \] &nbsp; \[ [Starting getwtxt](#starting-getwtxt) \]

To configure getwtxt, you'll first need to open `/usr/local/getwtxt/getwtxt.yml`
in your favorite editor and modify any values necessary. There are comments in the
file explaining each option.

If you desire, you may additionally modify the template in
`/usr/local/getwtxt/assets/tmpl/index.html` to customize the page users will see
when they pull up your registry instance in a web browser. The values in the
configuration file under `Instance:` are used to replace text `{{.Like This}}` in
the template.

### Proxying

Though getwtxt will run perfectly fine facing the internet directly, it does not
understand virtual hosts, nor does it use TLS. You'll probably want to proxy it
behind
`Caddy` or `nginx` for this reason.

`Caddy` is ludicrously easy to set up, and automatically handles `TLS`
certificates. Here's the config:

```caddyfile
twtxt.example.com
proxy / example.com:9001
```

If you're using `nginx`, here's a skeleton config to get you started. Don't
forget to change the 5 instances of `twtxt.example.com` to the (sub)domain
you'll be using to access the registry, generate SSL/TLS certificates using
LetsEncrypt, and change the port in `proxy_pass` to whichever port you
specified when modifying the configuration file. Currently, it's set to the
default port `9001`

```nginx
server {
    server_name twtxt.example.com;
    listen [::]:443 ssl http2;
    listen 0.0.0.0:443 ssl http2;
    ssl_certificate /etc/letsencrypt/live/twtxt.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/twtxt.example.com/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass http://127.0.0.1:9001;
    }
}
server {
    if ($host = twtxt.example.com) {
        return 301 https://$host$request_uri;
    }
    listen 80;
    server_name twtxt.example.com;
    return 404;
}
```

### Starting getwtxt

Once you have everything configured to your needs, use `systemctl` to enable it
to run on system boot, then start the service.

```
$ sudo systemctl enable getwtxt
...
$ sudo systemctl start getwtxt
```

## Using the Registry

The following examples will all apply to using `curl` from a `Linux`, `BSD`, or
`macOS` terminal. All timestamps are in `RFC3339` format, per the twtxt registry
specification. Additionally, all queries support the `?page=N` parameter, where
`N` is a positive integer, that will retrieve page `N` of results in groups of
twenty.

The example API calls can also be found on the landing page of any getwtxt
instance, assuming the admin has not customized the landing page.

### Adding a User
Both nickname and URL are required

```
$ curl -X POST 'https://twtxt.example.com/api/plain/users?url=https://mysite.ext/twtxt.txt&nickname=FooJr'

200 OK
```

### Get All Tweets

```
$ curl 'https://twtxt.example.com/api/plain/tweets'

foo_barrington  https://foo.bar.ext/twtxt.txt  2019-03-01T09:31:02.000Z Hey! It's my first status!
...
...
```

### Query Tweets by Keyword

```
$ curl 'https://twtxt.example.com/api/plain/tweets?q=getwtxt'

foo_barrington    https://example3.com/twtxt.txt    2019-04-30T06:00:09.000Z    I just installed getwtxt!
```

### Get All Users
Timestamp reflects when the user was added to the registry.

```
$ curl 'https://twtxt.example.com/api/plain/users'

foo_barrington      https://foo.barrington.ext/twtxt.txt  2017-01-01T09:17:02.000Z
foo_barrington_jr   https://example.com/twtxt.txt         2019-03-01T09:31:02.000Z
...
...
```

### Query Users
Can use either keyword or URL.

```
$ curl 'https://twtxt.example.com/api/plain/users?url=https://example.com/twtxt.txt'

foo               https://example.com/twtxt.txt     2019-05-09T08:42:23.000Z

$ curl 'https://twtxt.example.com/api/plain/users?q=foo'

foo               https://example.com/twtxt.txt     2019-05-09T08:42:23.000Z
foobar            https://example2.com/twtxt.txt    2019-03-14T19:23:00.000Z
foo_barrington    https://example3.com/twtxt.txt    2019-05-01T15:59:39.000Z
```

### Get all tweets with mentions
Mentions are placed within a status using the format `@<nickname http://url/twtxt.txt>`

```
$ curl 'https://twtxt.tilde.institute/api/plain/mentions'

foo               https://example.com/twtxt.txt     2019-02-28T11:06:44.000Z    @<foo_barrington https://example3.com/twtxt.txt> Hey!! Are you still working on that project?
bar               https://mxmmplm.com/twtxt.txt     2019-02-27T11:06:44.000Z    @<foobar https://example2.com/twtxt.txt> How's your day going, bud?
foo_barrington    https://example3.com/twtxt.txt    2019-02-26T11:06:44.000Z    @<foo https://example.com/twtxt.txt> Did you eat my lunch?
```

### Query tweets by mention URL

```
$ curl 'https://twtxt.tilde.institute/api/plain/mentions?url=https://foobarrington.co.uk/twtxt.txt'

foo    https://example.com/twtxt.txt    2019-02-26T11:06:44.000Z    @<foo_barrington https://foobarrington.co.uk/twtxt.txt> Hey!! Are you still working on that project?e
```

### Get all Tags

```
$ curl 'https://twtxt.example.com/api/plain/tags'

foo    https://example.com/twtxt.txt    2019-03-01T09:33:04.000Z    No, seriously, I need #help
foo    https://example.com/twtxt.txt    2019-03-01T09:32:12.000Z    Seriously, I love #programming!
foo    https://example.com/twtxt.txt    2019-03-01T09:31:02.000Z    I love #programming!
```

### Query by Tag

```
$ curl 'https://twtxt.example.com/api/plain/tags/programming'

foo    https://example.com/twtxt.txt    2019-03-01T09:31:02.000Z    I love #programming!
```

### Delete a User

```
$ curl -X DELETE -H 'X-Auth: password_in_getwtxt.yml' 'https://twtxt.example.com/api/admin/users?url=https://example.com/twtxt.txt'

200 OK
```

## Benchmarks

* [bombardier](https://github.com/codesenberg/bombardier)

```
$ bombardier -c 100 -n 200000 http://localhost:9001/api/plain/tweets

Bombarding http://localhost:9001/api/plain/tweets with 200000 request(s) using 100 connection(s)
 200000 / 200000 [=============================================================] 100.00% 19961/s 10s

Done!

Statistics        Avg      Stdev        Max
  Reqs/sec     20006.58    2408.55   26054.73
  Latency        5.00ms     3.58ms    62.99ms
  HTTP codes:
    1xx - 0, 2xx - 200000, 3xx - 0, 4xx - 0, 5xx - 0
    others - 0
  Throughput:    39.27MB/s
```

## Other Documentation

In addition to what is provided here, additional information, particularly
regarding the configuration file, may be found by running getwtxt with the `-m`
or `--manual` flags. You will likely want to pipe the output to `less` as it is
quite long.

```
$ ./getwtxt -m | less

$ ./getwtxt --manual | less
```

If you need to remove getwtxt from your system, navigate to the source directory
you acquired using `git` during the installation process and run the appropriate
`make` hook:

```
$ sudo make uninstall
```

## Notes

twtxt Information: [`twtxt.readthedocs.io`](https://twtxt.readthedocs.io)

Interested in twtxt but don't have your own server? [`github.com/LuRsT/twtxt_on_heroku`](https://github.com/LuRsT/twtxt_on_heroku)

twtxt Client Repo: [`github.com/buckket/twtxt`](https://github.com/buckket/twtxt)

Registry Specification: [`twtxt.readthedocs.io/en/latest/user/registry.html`](https://twtxt.readthedocs.io/en/latest/user/registry.html)

Special thanks to [`github.com/kognise/water.css`](https://github.com/kognise/water.css) for open-sourcing a pleasant, easy-to-use, importable stylesheet

## Contributing

All contributions are greatly appreciated!

* Mailing list for patches, discussion, etc:
  * [lists.sr.ht/~gbmor/getwtxt](https://lists.sr.ht/~gbmor/getwtxt)
* Ticket tracker:
  * [todo.sr.ht/~gbmor/getwtxt](https://todo.sr.ht/~gbmor/getwtxt)

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