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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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To do so, attach the following notices to the program. It is safest
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or school,
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For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# buzon
This utility listens for webhooks from Gitea or Forgejo and translates them to MQTT.
## What does this do exactly?
Runs as a service that simply listens for messages, converts them into messages
that are suitable for MQTT, and fires them to a configured MQTT-aware endpoint.
## What does the name come from?
Buzón, Spanish for Mailbox.
## How can we use it?
You can deploy the project using poetry or doing a regular pip install with
the requirements file and have fun. If possible, you can also use the packages
available with your distribution. To run, you will need to use uvicorn.
```
uvicorn --host 0.0.0.0 --port 18966 buzon.app:app
```
This service can be hosted either on the same git instance or another instance
(such as a container) entirely. At this time, it does not do authentication nor
secrets.
## Gitea/Forgejo Setup
In your forge, you will need to setup a webhook either at the repository level
or at the system level (site administration -> integrations). Either way, the
setup is as follows:
1. Add a webhook, choose "Gitea" or "Forgejo"
2. Fill in the target URL to where buzon is running and your desired event to handle
(e.g. http://localhost:8989/push-event)
3. HTTP Method is POST
4. POST Content Type is application/json
5. Optional: Secret can be filled, but it makes no difference in operation.
6. Select "Custom Events" and choose the applicable event (e.g. "Push")
7. Optional: You may set a branch filter if desired
8. Add Webhook
At this point, you will need to perform your desired operation to trigger an event.

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
The buzon module and accessories
"""

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
App Runner
All endpoints are here with some processing done here and in other modules.
"""
import json
import logging
import os
import time
# fastapi
import fastapi
# mqtt
from paho.mqtt.client import Client
# internal
from buzon.config import Configuration, Responder, EventPush
from buzon.util import loader, processor
# basic vars and calls
SVC = "buzon"
app = fastapi.FastAPI()
buzon_logger = logging.getLogger(SVC)
buzon_mqtt = Client(SVC)
# load config
buzon_config_path = loader.load_env('BUZON_CONFIG')
buzon_config = Configuration.parse_obj(
loader.load_yaml_config(buzon_config_path))
buzon_mode = buzon_config.mode
# start up logger
logging.basicConfig(level="INFO")
@app.on_event('startup')
async def startup():
"""Starting up buzon"""
buzon_logger.info('Starting up')
if buzon_mode == "test":
buzon_logger.warning('No MQTT messages will be sent in testing mode.')
else:
buzon_logger.info('Connecting to MQTT')
try:
buzon_mqtt.username_pw_set(
buzon_config.mqtt_user,
buzon_config.mqtt_password
)
buzon_mqtt.connect(
buzon_config.mqtt_host,
port=int(buzon_config.mqtt_port)
)
buzon_mqtt.loop_start()
buzon_logger.info('Connected!')
except Exception as exc:
raise SystemExit(f'There was an error connecting: {exc}')
@app.on_event('shutdown')
async def shutdown():
"""Shutting down buzon"""
buzon_logger.info('Shutting down')
@app.get('/')
async def root():
"""
What's at the root? Nothing.
"""
return {"message": "buzon, a carrier for gitea webhooks"}
@app.post(
'/push-event',
response_model=Responder,
responses={201: {'model': Responder}, 400: {'model': Responder}}
)
async def push_event(event_data: EventPush):
"""
Pushes event for modified repositories
This comes back as JSONResponse.
"""
processor_event = processor.process_respond(
buzon_config.mqtt_topic_commits,
event_data,
buzon_mqtt,
buzon_config,
buzon_logger,
buzon_mode,
retries=5,
sleep=10
)
return processor_event

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Config module with very clear defaults to load
"""
from .carrier import Responder, Configuration, Committer, User, \
Repo, RepoForked, RepoShort, Commit, EventPush, \
EventFork, Milestone, Label, Issue, EventIssue

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Carrier module
"""
import typing
from datetime import datetime
from pydantic import BaseModel
__all__ = [
'Responder',
'Configuration',
'Committer',
'User',
'Repo',
'RepoForked',
'RepoShort',
'Commit',
'EventPush',
'EventFork',
'Milestone',
'Label',
'Issue',
'EventIssue',
]
class Responder(BaseModel):
"""
True or false reponse
"""
confirm: bool
class Configuration(BaseModel):
"""
Configuration stuff
"""
loglevel: str
mqtt_host: str
mqtt_port: int
mqtt_user: str
mqtt_password: str
mqtt_topic_commits: str
mqtt_topic_default: str
mqtt_qos: int
mode: typing.Literal['test', 'prod']
class Committer(BaseModel):
"""
Committer information (which doesn't seem to be a lot)
"""
email: str
name: str
username: str
class User(BaseModel):
"""
User information, but more than the committer data
"""
id: int
login: str
full_name: str
email: str
username: str
class Repo(BaseModel):
"""
Repository information
"""
id: int
owner: User
name: str
full_name: str
description: typing.Optional[str]
empty: bool
private: bool
fork: bool
template: bool
mirror: bool
html_url: str
ssh_url: str
clone_url: str
website: typing.Optional[str]
stars_count: int
forks_count: int
watchers_count: int
open_issues_count: int
default_branch: str
created_at: datetime
updated_at: datetime
# There should be a better way to do this
class RepoForked(BaseModel):
"""
Repository information (forked)
"""
id: int
owner: User
name: str
full_name: str
description: typing.Optional[str]
empty: bool
private: bool
fork: bool
template: bool
parent: typing.Optional[Repo]
mirror: bool
html_url: str
ssh_url: str
clone_url: str
website: typing.Optional[str]
stars_count: int
forks_count: int
watchers_count: int
open_issues_count: int
default_branch: str
created_at: datetime
updated_at: datetime
class RepoShort(BaseModel):
"""
Short repo data
"""
id: int
owner: User
name: str
full_name: str
class Commit(BaseModel):
"""
Commit data
"""
id: str
message: str
url: str
author: Committer
committer: Committer
timestamp: datetime
class EventPush(BaseModel):
"""
Basically the push trigger
"""
secret: typing.Optional[str] = ''
ref: str = ''
before: str = ''
after: str = ''
compare_url: str = ''
commits: typing.List[Commit]
repository: Repo
pusher: User
sender: User
class EventFork(BaseModel):
"""
Basically the fork trigger
"""
forkee: Repo
repository: RepoForked
sender: User
class Milestone(BaseModel):
"""
Milestone template
"""
id: int
title: str
description: str
state: str
open_issues: int
closed_issues: int
created_at: datetime
updated_at: datetime
class Label(BaseModel):
"""
Label template
"""
id: int
name: str
color: str
description: str
url: str
class Issue(BaseModel):
"""
Issue template
"""
id: int
url: str
html_url: str
number: int
user: User
title: str
body: str
ref: str
labels: typing.List[Label]
milestone: Milestone
assignee: User
assignees: typing.List[User]
state: str
is_locked: bool
comments: int
created_at: datetime
updated_at: datetime
closed_at: datetime
repository: RepoShort
class EventIssue(BaseModel):
"""
Issue event
"""
action: str
number: int
issue: Issue
repository: Repo
sender: User
commit_id: str

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Start up the util module with no defaults
"""

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Encode utilities
"""
import json
from datetime import datetime
from typing import Any
__all__ = ['SafeDateTimeEncode']
class SafeDateTimeEncode(json.JSONEncoder):
"""
Serialization of datetime objects to unix epoch
"""
def default(self, o: Any) -> Any:
"""
Default action, exports to iso format
"""
if isinstance(o, datetime):
conv_to_epoch = str(int(o.timestamp()))
return conv_to_epoch
return super().default(o)

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Loaders
"""
import os
import yaml
__all__ = ['load_yaml_config', 'load_env']
def load_yaml_config(file: str):
"""
Loads a YAML config
"""
with open(file, "r") as conf:
try:
config = yaml.safe_load(conf)
except yaml.YAMLError as exc:
print(exc)
return config
def load_env(var):
"""
Given a specific environment variable, check its existence and return it
"""
environ_value = os.environ.get(var)
if not environ_value:
raise ValueError(f'The {var} variable is not set.')
return environ_value

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# -*-:python; coding:utf-8; -*-
# author: Louis Abel <label@rockylinux.org>
"""
Processor operations
"""
import time
import json
from fastapi.responses import JSONResponse
from buzon.util import encode
from buzon.config import EventPush
# pylint: disable=too-many-positional-arguments,too-many-arguments
def process_respond(
topic: str,
data: EventPush,
mqtt_client,
config,
logger,
mode,
retries: int = 5,
sleep: int = 10) -> JSONResponse:
"""
Provides a json response based on the pushed data response.
Parameters
----------
topic: The topic name
data: EventPush
mqtt_client: A mqtt client object
config: Config object
logger: Logging object
retries: How many times to try to push
sleep: How long to wait to retry
Returns
-------
JSONResponse
"""
push_return = process_push_data(topic, data, mqtt_client, config, logger,
mode, retries, sleep)
if not push_return:
return JSONResponse({'ok': False}, status_code=400)
return JSONResponse({'ok': True}, status_code=201)
def process_push_data(
topic,
data: EventPush,
mqtt_client,
config,
logger,
mode,
retries: int,
sleep: int) -> bool:
"""
Processes and pushes data to an mqtt feed
"""
try:
payload = data.dict()
logger.debug(f'Attempting to publish event: {payload}')
retry_count = retries
sleep_count = sleep
success = False
send = None
if mode == "test":
# test mode
logger.info(f'mqtt: {mqtt_client}')
logger.info(f'topic: {topic}')
logger.info(f'Data: {json.dumps(payload, cls=encode.SafeDateTimeEncode)}')
logger.info(f'QOS: {config.mqtt_qos}')
success = True
else:
# production mode
while not success and retry_count > 0:
info = mqtt_client.publish(
topic,
payload=json.dumps(payload, cls=encode.SafeDateTimeEncode),
qos=config.mqtt_qos
)
success = info.rc == 0
if not success:
time.sleep(sleep_count)
sleep_count += sleep
if not success:
logger.error(f'Cannot send data: {send}')
return False
logger.info('Data sent!')
return True
# pylint: disable=broad-exception-caught
except Exception as exc:
logger.error(f'Error sending data: {exc}')
return False

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---
mqtt_host: mq.rockylinux.org
mqtt_port: 1883
mqtt_user: buzon
mqtt_password: buzon
mqtt_topic_commits: commits
mqtt_topic_default: default
mqtt_qos: 2
loglevel: INFO
mode: test
...

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[project]
name = "buzon"
version = "0.1.0"
description = "MQTT webhook delivery service"
readme = "README.md"
authors = [
{ name = "Louis Abel", email = "label@rockylinux.org" }
]
maintainers = [
{ name = "Louis Abel", email = "label@rockylinux.org" }
]
requires-python = ">=3.9"
dependencies = [
"fastapi == 0.115.5",
"paho-mqtt == 1.6.1",
"pydantic == 2.9.2"
"uvicorn >= 0.29.0"
]
[project.urls]
"Homepage" = "https://git.resf.org/infrastructure/buzon"
"Bug Tracker" = "https://git.resf.org/infrastructure/buzon/issues"
[project.license]
file = "LICENSE"
[tool.setuptools]
package-dir = { "buzon" = "buzon" }

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fastapi==0.115.5
paho-mqtt==1.6.1
pydantic==2.9.2
uvicorn>=0.29.0