0.5.1: Add proper alias.json specification

Signed-off-by: Ivan Bushchik <ivabus@ivabus.dev>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "urouter"
-version = "0.5.0"
+version = "0.5.1"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/ivabus/urouter"

README.md

@@ -5,13 +5,44 @@ Static (list of routes read once) http router for routing small domains.
 ## Installation
 
 ```shell
-git clone https://github.com/ivabus/urouter
+cargo install urouter
-cd urouter
 ```
 
 Edit `alias.json` (or any other JSON file, check `--alias-file` option) and `cargo run`
 
-## `alias.json` example
+## `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.
+
+- Necessary
+  - `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 `content-type: text/plain; charset=utf-8`
+    - `text` (string) - plain text
+- Optional
+  - `agent` (set) - 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
+
+```json
+{
+  "alias": [
+    {
+      "uri": "/",
+      "alias": {
+        "url":  "https://somecoolwebsite"
+      }
+    }
+  ]
+}
+```
+
+### `alias.json` example
 
 ```json
 [
@@ -32,7 +63,7 @@ Edit `alias.json` (or any other JSON file, check `--alias-file` option) and `car
     }
   },
   {
-    "uri":"/text",
+    "uri": "text",
     "alias": {
       "text": "sometext"
     }

alias.json

@@ -0,0 +1,27 @@
+[
+  {
+    "uri":"/",
+    "alias": {
+      "url":  "https://ivabus.dev"
+    }
+  },
+  {
+    "uri":"/",
+    "alias": {
+      "file": "src/main.rs"
+    },
+    "agent": {
+      "regex": "^curl/[0-9].[0-9].[0-9]$"
+    }
+  },
+  {
+    "uri":"text",
+    "alias": {
+      "text": "sometext"
+    },
+    "agent": {
+      "regex": "^curl/[0-9].[0-9].[0-9]$",
+      "only_matching": true
+    }
+  }
+]

src/main.rs

@@ -57,7 +57,7 @@ fn get_return(alias: &Alias) -> Response {
 }
 
 #[get("/<page>")]
-fn get_page(page: String, user_agent: UserAgent) -> Response {
+fn get_page(page: &str, user_agent: UserAgent) -> Response {
 	let mut decoded_page = String::new();
 	url_escape::decode_to_string(page, &mut decoded_page);
 	let alias = unsafe { ALIAS.get().unwrap() };
@@ -102,7 +102,7 @@ fn get_page(page: String, user_agent: UserAgent) -> Response {
 
 #[get("/")]
 async fn index(user_agent: UserAgent) -> Response {
-	get_page("/".to_string(), user_agent)
+	get_page("/", user_agent)
 }
 
 #[rocket::main]