diff --git a/.gitignore b/.gitignore
index 55be276..c54125e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,154 +1 @@
-# ---> Python
-# Byte-compiled / optimized / DLL files
-__pycache__/
-*.py[cod]
-*$py.class
-
-# C extensions
-*.so
-
-# Distribution / packaging
-.Python
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-wheels/
-share/python-wheels/
-*.egg-info/
-.installed.cfg
-*.egg
-MANIFEST
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.nox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*.cover
-*.py,cover
-.hypothesis/
-.pytest_cache/
-cover/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-db.sqlite3
-db.sqlite3-journal
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-docs/_build/
-
-# PyBuilder
-.pybuilder/
-target/
-
-# Jupyter Notebook
-.ipynb_checkpoints
-
-# IPython
-profile_default/
-ipython_config.py
-
-# pyenv
-#   For a library or package, you might want to ignore these files since the code is
-#   intended to run in multiple environments; otherwise, check them in:
-# .python-version
-
-# pipenv
-#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
-#   However, in case of collaboration, if having platform-specific dependencies or dependencies
-#   having no cross-platform support, pipenv may install dependencies that don't work, or not
-#   install all needed dependencies.
-#Pipfile.lock
-
-# poetry
-#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
-#   This is especially recommended for binary packages to ensure reproducibility, and is more
-#   commonly ignored for libraries.
-#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
-#poetry.lock
-
-# PEP 582; used by e.g. github.com/David-OConnor/pyflow
-__pypackages__/
-
-# Celery stuff
-celerybeat-schedule
-celerybeat.pid
-
-# SageMath parsed files
-*.sage.py
-
-# Environments
-.env
-.venv
-env/
-venv/
-ENV/
-env.bak/
-venv.bak/
-
-# Spyder project settings
-.spyderproject
-.spyproject
-
-# Rope project settings
-.ropeproject
-
-# mkdocs documentation
-/site
-
-# mypy
-.mypy_cache/
-.dmypy.json
-dmypy.json
-
-# Pyre type checker
-.pyre/
-
-# pytype static type analyzer
-.pytype/
-
-# Cython debug symbols
-cython_debug/
-
-# PyCharm
-#  JetBrains specific template is maintainted in a separate JetBrains.gitignore that can
-#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
-#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
-
+_state
diff --git a/curlgrep.sh b/curlgrep.sh
new file mode 100755
index 0000000..2400cb2
--- /dev/null
+++ b/curlgrep.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+STATE_DIR="$(dirname $(readlink -f "$0"))/_state"
+URLS=(
+    'https://tmp.tobast.fr/testcurl'
+)
+PATTERNS=(
+    '1'
+)
+MESSAGES=(
+    'match'
+)
+
+
+function do_one {
+    if [ "$#" -lt 4 ] ; then
+        >&2 echo "Missing argument to do_one."
+        return
+    fi
+
+    url="$1"
+    pattern="$2"
+    msg="$3"
+    elt_id="$4"
+    state_path="$STATE_DIR/$elt_id"
+
+    curl -s "$url" | grep -q "$pattern"
+    no_match="$?"
+
+    if [ "$no_match" -eq 1 ]; then
+        if [ -f "$state_path" ] ; then
+            rm -f "$state_path"
+        fi
+    else # match
+        if ! [ -f "$state_path" ] ; then  # no previous match
+            echo "NEW MATCH: $msg"
+            touch "$state_path"
+        fi
+    fi
+}
+
+if [ "${#URLS[@]}" -ne "${#PATTERNS[@]}" ] \
+    || [ "${#URLS[@]}" -ne "${#MESSAGES[@]}" ]
+then
+    >&2 echo "Bad configuration: unbalanced number of elements"
+    exit 2
+fi
+mkdir -p "$STATE_DIR"
+
+for elt_id in "${!URLS[@]}"; do
+    do_one \
+        "${URLS[$elt_id]}" \
+        "${PATTERNS[$elt_id]}" \
+        "${MESSAGES[$elt_id]}" \
+        "$elt_id"
+done