urouter/README.md
Ivan Bushchik 653b41a67f
0.6.1: Add "html" alias type, fix --alias-file
Signed-off-by: Ivan Bushchik <ivabus@ivabus.dev>
2024-01-21 08:36:30 +03:00

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# urouter
Static (list of routes read once) http router for routing small domains.
## Installation
```shell
cargo install urouter
```
Edit `alias.json` (or any other JSON file, check `--alias-file` option) and `cargo run`
## `alias.json` specification
JSON file with array of sets (or set with one field of arrays of sets with `--alias-file-is-set-not-a-list`, may be useful i.e. [Nix packaging](https://github.com/ivabus/nixos/blob/master/roles/server/urouter.nix)).
Each set contains 2 necessary elements and 1 optional.
- `uri` (string) - of URL after host (e.g., `/`, `some/cool/path`, should not start with `/` (only for root))
- `alias` (set) - set of one field
- `url` (string) - redirect to URL with HTTP 303 See Other
- `file` (string) - read file from path `--dir/file` where `--dir` is option (default: `.`, see `--help`) and respond with HTTP 200 OK with `content-type: text/plain`
- `text` (string) - plain text with HTTP 200 OK with `content-type: text/plain`
- `html` (string) - plain text with HTTP 200 OK with `content-type: text/html`
- `external` (set) - download (every time) file using `ureq` HTTP library and response with contents of downloaded resource with HTTP 200 OK and extracted `content-type` from response
- `url` (string) - URL to download
- `headers` (set, optional) - headers to include with request
- `agent` (set, optional) - set of one necessary field and one optional
- `regex` (string) - regular expression to match user-agent HTTP header
- `only_matching` (bool, optional, false by default) - if false whole alias will be visible for any user agent, if true only for regex matched
#### Set of array of sets (use only for very specific workarounds)
```json
{
"alias": [
{
"uri": "/",
"alias": {
"url": "https://somecoolwebsite"
}
}
]
}
```
### `alias.json` example
```json
[
{
"uri": "/",
"alias": {
"url": "https://somecoolwebsite"
}
},
{
"uri": "/",
"alias": {
"file": "somecoolscript"
},
"agent": {
"regex": "^curl/[0-9].[0-9].[0-9]$",
"only_matching": false
}
},
{
"uri": "text",
"alias": {
"text": "sometext"
}
},
{
"uri": "external",
"alias": {
"external": {
"url": "https://somecool.external.link",
"headers": {
"user-agent": "curl/8.6.0"
}
}
}
}
]
```
Agent matching made for `curl https://url | sh` like scripts.
## `alias.json` location
- Passed with `--alias_file`, will look up to this path, if file doesn't exist (or no access to it) will panic
- If urouter started with privileges (EUID = 0), file would be `/etc/urouter/alias.json`
- Otherwise if `XDG_CONFIG_HOME` is set, file would be `$XDG_CONFIG_HOME/urouter/alias.json`
- Otherwise if `$HOME` is set, file would be `$HOME/.config/urouter/alias.json`
- If not matched any, will panic and exit
## License
The project is licensed under the terms of the [MIT license](./LICENSE).