Add website monitor

.github/workflows/python.yml

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+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+name: Python Lint and Test
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python 3.13
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.13'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install flake8 pytest
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Lint
+      run: |
+        flake8 . --count --show-source --statistics
+        isort *.py --diff
+    - name: Test with pytest
+      run: |
+        pytest

.github/workflows/reuse.yml

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+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+name: REUSE Compliance Check
+
+on: [push, pull_request]
+
+jobs:
+  reuse-compliance-check:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: REUSE Compliance Check
+      uses: fsfe/reuse-action@v5

LICENSES/MIT.txt

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+MIT License
+
+Copyright (c) 2025 Ruslan Mstoi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

README.adoc

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+// SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+//
+// SPDX-License-Identifier: MIT
+
+= Website monitor
+
+:toc:
+
+A program that monitors the availability of many websites over the network,
+produces metrics about these and stores the metrics into a PostgreSQL database.
+
+= Install dependencies
+
+To install needed Python packages
+
+`python3 -m pip install -r requirements.txt`
+
+= Usage
+
+All of the default configuration settings are in `config.yaml` file. To use different
+configuration settings yaml file pass it as an arument of -c option.
+
+To change PostgreSQL database settings modify db.conninfo and db.table_name
+attributes.
+
+To add new sites to monitor add them to the `sites` list. Set as needed check
+interval and regular expression pattern to check in the returned page.
+
+To start site monitor
+
+`./wsmon.py`
+
+Press Ctrl-C to stop `wsmon.py`
+
+== Site check failure
+
+If website check fails the error info will be saved to the database. Failing
+site will be checked again max_retry times.
+
+== Unit tests
+
+Use `pytest` to run unit tests:
+
+`pytest .`

config.yaml

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+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+# database related variables
+db:
+  # name of table used for site monitor results
+  table_name: "wsmon_results"
+
+  # connection info, parameter to psycopg.AsyncConnection.connect
+  conninfo:
+    dbname: "wsmon"
+    host: "localhost"
+    port: 5432
+    # "user": "user",
+    # "password": "password",
+
+# websites to monitor
+sites:
+  - url: "https://www.brokenwebsitedoesnotexist.com"
+    check_interval: 5
+  - url: "https://www.google.com"
+    check_interval: 10
+    pattern: ".*ogle"
+  - url: "http://python.org"
+    check_interval: 15
+    pattern: "\\d+"
+  - url: "https://www.yahoo.com"
+    check_interval: 30
+    pattern: "zzz"
+  - url: "https://github.com"
+    check_interval: 10
+  - url: "https://www.stackoverflow.com"
+    check_interval: 300
+  - url: "https://www.linkedin.com"
+    check_interval: 100
+
+# max time to retry a failing website monitor
+max_retry: 2

qacheck.sh

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+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+set -x
+
+files="wsmon.py test_wsmon.py"
+
+isort $files
+flake8 $files
+reuse lint

requirements.txt

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+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+aiohttp
+psycopg
+pyyaml

test_wsmon.py

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+# SPDX-FileCopyrightText: 2025 Ruslan Mstoi <[email protected]>
+#
+# SPDX-License-Identifier: MIT
+
+from wsmon import WSData
+
+# WSData default test arguments
+url = "http://testsite.io"
+check_interval = 111
+pattern = r'(.*) example'
+
+
+def test_wsdata_init():
+    site = WSData(url, check_interval, pattern)
+    assert site.url == url
+    assert site.check_interval == check_interval
+    assert site.pattern == pattern
+
+
+def test_wsdata_init_default():
+    """Test default arguments"""
+    site = WSData(url)
+    assert site.url == url
+    assert site.check_interval == 5
+    assert site.pattern is None
+
+
+def test_wsdata_str():
+    site = WSData(url, check_interval, pattern)
+    expect_str = ("url=%s check_interval=%s pattern=%r" %
+                  (url, check_interval, pattern))
+    assert str(site) == expect_str