This is a small tool to watch a certain url for changes. You probably want to use this to check for changes in an HTML document, but other files should work as well. (As long as they can be reached over HTTP(S)).
When a change is detected, you can set up notifications. Currently, only notifications over a Discord webhook are supported.
First, compile for release:
cargo build -rThe compiled binary can be found in ./target/release/html-watcher.
After that, make sure you have set the required environment variables in .env.
The following variables are available:
| Variable | Description | Optional | Default |
|---|---|---|---|
URL |
URL to fetch | ❌ | - |
GROUP_SIZE |
How many lines of context should be included in the notification diff | ✅ | 3 |
OUTPUT_DIR |
Directory to store the last response | ✅ | ./outputs |
USER_AGENT |
User agent used to do the request | ✅ | reqwest |
IGNORED_LINES |
Comma-separated list of lines to ignore. All lines that contain this string are ignored | ✅ | - |
DISCORD_WEBHOOK_URL |
Discord webhook URL | ✅ | - |
DISCORD_USER_ID |
If set, the given user is tagged. | ✅ | - |
DISCORD_MESSAGE |
If set, this message is included in the discord notification. | ✅ | - |
The easiest way to periodically do a check is to create a cronjob. Such a cronjob might look like this:
0,30 * * * * cd <path-to-this-project> && ./target/release/html-watcherChanging to the root of this project is required to load the .env file.
