Add RSS feeds (fix #57) (#90)

* Add RSS feeds

* feat(rss): feature-ify rss

* feat(rss): config-ify rss

* fix(rss): update info page

* feat(rss): conditionally add RSS feeds to user and sub pages

* feat(rss): implement URLs for RSS

Cargo.lock

@@ -98,7 +98,7 @@ dependencies = [
  "mime_guess",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -124,7 +124,20 @@ checksum = "c6fa2087f2753a7da8cc1c0dbfcf89579dd57458e36769de5ac750b4671737ca"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
+]
+
+[[package]]
+name = "atom_syndication"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f34613907f31c9dbef0240156db3c9263f34842b6e1a8999d2304ea62c8a30"
+dependencies = [
+ "chrono",
+ "derive_builder 0.20.0",
+ "diligent-date-parser",
+ "never",
+ "quick-xml 0.31.0",
 ]
 
 [[package]]
@@ -236,10 +249,10 @@ version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "771aa57f3b17da6c8bcacb187bb9ec9bc81c8160e72342e67c329e0e1651a669"
 dependencies = [
- "darling",
+ "darling 0.20.9",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -260,6 +273,15 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chrono"
+version = "0.4.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a21f936df1771bf62b77f047b726c4625ff2e8aa607c01ec06e5a05bd8463401"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.7"
@@ -348,14 +370,38 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "darling"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b750cb3417fd1b327431a470f388520309479ab0bf5e323505daf0290cd3850"
+dependencies = [
+ "darling_core 0.14.4",
+ "darling_macro 0.14.4",
+]
+
 [[package]]
 name = "darling"
 version = "0.20.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83b2eb4d90d12bdda5ed17de686c2acb4c57914f8f921b8da7e112b5a36f3fe1"
 dependencies = [
- "darling_core",
+ "darling_core 0.20.9",
- "darling_macro",
+ "darling_macro 0.20.9",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "109c1ca6e6b7f82cc233a97004ea8ed7ca123a9af07a8230878fcfda9b158bf0"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim 0.10.0",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -368,8 +414,19 @@ dependencies = [
  "ident_case",
  "proc-macro2",
  "quote",
- "strsim",
+ "strsim 0.11.1",
- "syn",
+ "syn 2.0.68",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4aab4dbc9f7611d8b55048a3a16d2d010c2c8334e46304b40ac1cc14bf3b48e"
+dependencies = [
+ "darling_core 0.14.4",
+ "quote",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -378,9 +435,9 @@ version = "0.20.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "733cabb43482b1a1b53eee8583c2b9e8684d592215ea83efd305dd31bc2f0178"
 dependencies = [
- "darling_core",
+ "darling_core 0.20.9",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -398,6 +455,68 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "derive_builder"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d67778784b508018359cbc8696edb3db78160bab2c2a28ba7f56ef6932997f8"
+dependencies = [
+ "derive_builder_macro 0.12.0",
+]
+
+[[package]]
+name = "derive_builder"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0350b5cb0331628a5916d6c5c0b72e97393b8b6b03b47a9284f4e7f5a405ffd7"
+dependencies = [
+ "derive_builder_macro 0.20.0",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c11bdc11a0c47bc7d37d582b5285da6849c96681023680b906673c5707af7b0f"
+dependencies = [
+ "darling 0.14.4",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d48cda787f839151732d396ac69e3473923d54312c070ee21e9effcaa8ca0b1d"
+dependencies = [
+ "darling 0.20.9",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.68",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebcda35c7a396850a55ffeac740804b40ffec779b98fffbb1738f4033f0ee79e"
+dependencies = [
+ "derive_builder_core 0.12.0",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206868b8242f27cecce124c19fd88157fbd0dd334df2587f36417bafbc85097b"
+dependencies = [
+ "derive_builder_core 0.20.0",
+ "syn 2.0.68",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -408,12 +527,30 @@ dependencies = [
  "crypto-common",
 ]
 
+[[package]]
+name = "diligent-date-parser"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6cf7fe294274a222363f84bcb63cdea762979a0443b4cf1f4f8fd17c86b1182"
+dependencies = [
+ "chrono",
+]
+
 [[package]]
 name = "dotenvy"
 version = "0.15.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7268b386296a025e474d5140678f75d6de9493ae55a5d709eeb9dd08149945e1"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "env_logger"
 version = "0.10.2"
@@ -862,6 +999,12 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "never"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c96aba5aa877601bb3f6dd6a63a969e1f82e60646e81e71b14496995e9853c91"
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -878,6 +1021,15 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
 
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.16.0"
@@ -1002,6 +1154,26 @@ version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
+[[package]]
+name = "quick-xml"
+version = "0.30.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eff6510e86862b57b210fd8cbe8ed3f0d7d600b9c2863cd4549a2e033c66e956"
+dependencies = [
+ "encoding_rs",
+ "memchr",
+]
+
+[[package]]
+name = "quick-xml"
+version = "0.31.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1004a344b30a54e2ee58d66a71b32d2db2feb0a31f9a2d302bf0536f15de2a33"
+dependencies = [
+ "encoding_rs",
+ "memchr",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.36"
@@ -1061,6 +1233,7 @@ dependencies = [
  "pretty_env_logger",
  "regex",
  "route-recognizer",
+ "rss",
  "rust-embed",
  "sealed_test",
  "serde",
@@ -1138,6 +1311,18 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "afab94fb28594581f62d981211a9a4d53cc8130bbcbbb89a0440d9b8e81a7746"
 
+[[package]]
+name = "rss"
+version = "2.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7b2c77eb4450d7d5f98df52c381cd6c4e19b75dad9209a9530b85a44510219a"
+dependencies = [
+ "atom_syndication",
+ "derive_builder 0.12.0",
+ "never",
+ "quick-xml 0.30.0",
+]
+
 [[package]]
 name = "rust-embed"
 version = "8.4.0"
@@ -1158,7 +1343,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rust-embed-utils",
- "syn",
+ "syn 2.0.68",
  "walkdir",
 ]
 
@@ -1307,7 +1492,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77253fb2d4451418d07025826028bcb96ee42d3e58859689a70ce62908009db6"
 dependencies = [
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -1350,7 +1535,7 @@ checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -1437,6 +1622,12 @@ version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -1449,6 +1640,17 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.68"
@@ -1498,7 +1700,7 @@ checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -1576,7 +1778,7 @@ checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]
@@ -1950,7 +2152,7 @@ checksum = "15e934569e47891f7d9411f1a451d947a60e000ab3bd24fbb970f000387d1b3b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.68",
 ]
 
 [[package]]

Cargo.toml

@@ -42,8 +42,10 @@ fastrand = "2.0.1"
 log = "0.4.20"
 pretty_env_logger = "0.5.0"
 dotenvy = "0.15.7"
+rss = "2.0.7"
 arc-swap = "1.7.1"
 
+
 [dev-dependencies]
 lipsum = "0.9.0"
 sealed_test = "1.0.0"

README.md

@@ -381,7 +381,8 @@ Assign a default value for each instance-specific setting by passing environment
 | `ROBOTS_DISABLE_INDEXING` | `["on", "off"]` | `off`                  | Disables indexing of the instance by search engines.                                                      |
 | `PUSHSHIFT_FRONTEND`      | String          | `undelete.pullpush.io` | Allows the server to set the Pushshift frontend to be used with "removed" links.                          |
 | `PORT`                    | Integer 0-65535 | `8080`                 | The **internal** port Redlib listens on.                                                                  |
-
+| `ENABLE_RSS`              | `["on", "off"]` | `off`                  | Enables RSS feed generation.                                                                              |
+| `FULL_URL`                | String          | (empty)                | Allows for proper URLs (for now, only needed by RSS)
 ## Default user settings
 
 Assign a default value for each user-modifiable setting by passing environment variables to Redlib in the format `REDLIB_DEFAULT_{Y}`. Replace `{Y}` with the setting name (see list below) in capital letters.

app.json

@@ -56,8 +56,8 @@
     "REDLIB_BANNER": {
       "required": false
     },
-    "REDLIB_ROBOTS_DISABLE_INDEXING":  {
+    "REDLIB_ROBOTS_DISABLE_INDEXING": {
-        "required": false
+      "required": false
     },
     "REDLIB_DEFAULT_SUBSCRIPTIONS": {
       "required": false
@@ -70,6 +70,12 @@
     },
     "REDLIB_PUSHSHIFT_FRONTEND": {
       "required": false
+    },
+    "REDLIB_ENABLE_RSS": {
+      "required": false
+    },
+    "REDLIB_FULL_URL": {
+      "required": false
     }
   }
 }

src/config.rs

@@ -103,6 +103,12 @@ pub struct Config {
 	#[serde(rename = "REDLIB_PUSHSHIFT_FRONTEND")]
 	#[serde(alias = "LIBREDDIT_PUSHSHIFT_FRONTEND")]
 	pub(crate) pushshift: Option<String>,
+
+	#[serde(rename = "REDLIB_ENABLE_RSS")]
+	pub(crate) enable_rss: Option<String>,
+
+	#[serde(rename = "REDLIB_FULL_URL")]
+	pub(crate) full_url: Option<String>,
 }
 
 impl Config {
@@ -148,6 +154,8 @@ impl Config {
 			banner: parse("REDLIB_BANNER"),
 			robots_disable_indexing: parse("REDLIB_ROBOTS_DISABLE_INDEXING"),
 			pushshift: parse("REDLIB_PUSHSHIFT_FRONTEND"),
+			enable_rss: parse("REDLIB_ENABLE_RSS"),
+			full_url: parse("REDLIB_FULL_URL"),
 		}
 	}
 }
@@ -175,6 +183,8 @@ fn get_setting_from_config(name: &str, config: &Config) -> Option<String> {
 		"REDLIB_BANNER" => config.banner.clone(),
 		"REDLIB_ROBOTS_DISABLE_INDEXING" => config.robots_disable_indexing.clone(),
 		"REDLIB_PUSHSHIFT_FRONTEND" => config.pushshift.clone(),
+		"REDLIB_ENABLE_RSS" => config.enable_rss.clone(),
+		"REDLIB_FULL_URL" => config.full_url.clone(),
 		_ => None,
 	}
 }

src/instance_info.rs

@@ -126,6 +126,8 @@ impl InstanceInfo {
 				["Compile mode", &self.compile_mode],
 				["SFW only", &convert(&self.config.sfw_only)],
 				["Pushshift frontend", &convert(&self.config.pushshift)],
+				["RSS enabled", &convert(&self.config.enable_rss)],
+				["Full URL", &convert(&self.config.full_url)],
 				//TODO: fallback to crate::config::DEFAULT_PUSHSHIFT_FRONTEND
 			])
 			.with_header_row(["Settings"]),
@@ -165,6 +167,8 @@ impl InstanceInfo {
                 Compile mode: {}\n
 				SFW only: {:?}\n
 				Pushshift frontend: {:?}\n
+				RSS enabled: {:?}\n
+				Full URL: {:?}\n
                 Config:\n
                     Banner: {:?}\n
                     Hide awards: {:?}\n
@@ -189,6 +193,8 @@ impl InstanceInfo {
 					self.deploy_unix_ts,
 					self.compile_mode,
 					self.config.sfw_only,
+					self.config.enable_rss,
+					self.config.full_url,
 					self.config.pushshift,
 					self.config.banner,
 					self.config.default_hide_awards,

src/main.rs

@@ -254,6 +254,7 @@ async fn main() {
 	app.at("/u/:name/comments/:id/:title/:comment_id").get(|r| post::item(r).boxed());
 
 	app.at("/user/[deleted]").get(|req| error(req, "User has deleted their account").boxed());
+	app.at("/user/:name.rss").get(|r| user::rss(r).boxed());
 	app.at("/user/:name").get(|r| user::profile(r).boxed());
 	app.at("/user/:name/:listing").get(|r| user::profile(r).boxed());
 	app.at("/user/:name/comments/:id").get(|r| post::item(r).boxed());
@@ -265,6 +266,9 @@ async fn main() {
 	app.at("/settings/restore").get(|r| settings::restore(r).boxed());
 	app.at("/settings/update").get(|r| settings::update(r).boxed());
 
+	// RSS Subscriptions
+	app.at("/r/:sub.rss").get(|r| subreddit::rss(r).boxed());
+
 	// Subreddit services
 	app
 		.at("/r/:sub")

src/subreddit.rs

@@ -1,3 +1,4 @@
+use crate::{config, utils};
 // CRATES
 use crate::utils::{
 	catch_random, error, filter_posts, format_num, format_url, get_filters, nsfw_landing, param, redirect, rewrite_urls, setting, template, val, Post, Preferences, Subreddit,
@@ -459,6 +460,56 @@ async fn subreddit(sub: &str, quarantined: bool) -> Result<Subreddit, String> {
 	})
 }
 
+pub async fn rss(req: Request<Body>) -> Result<Response<Body>, String> {
+	if config::get_setting("REDLIB_ENABLE_RSS").is_none() {
+		return Ok(error(req, "RSS is disabled on this instance.").await.unwrap_or_default());
+	}
+
+	use hyper::header::CONTENT_TYPE;
+	use rss::{ChannelBuilder, Item};
+
+	// Get subreddit
+	let sub = req.param("sub").unwrap_or_default();
+	let post_sort = req.cookie("post_sort").map_or_else(|| "hot".to_string(), |c| c.value().to_string());
+	let sort = req.param("sort").unwrap_or_else(|| req.param("id").unwrap_or(post_sort));
+
+	// Get path
+	let path = format!("/r/{sub}/{sort}.json?{}", req.uri().query().unwrap_or_default());
+
+	// Get subreddit data
+	let subreddit = subreddit(&sub, false).await?;
+
+	// Get posts
+	let (posts, _) = Post::fetch(&path, false).await?;
+
+	// Build the RSS feed
+	let channel = ChannelBuilder::default()
+		.title(&subreddit.title)
+		.description(&subreddit.description)
+		.items(
+			posts
+				.into_iter()
+				.map(|post| Item {
+					title: Some(post.title.to_string()),
+					link: Some(utils::get_post_url(&post)),
+					author: Some(post.author.name),
+					content: Some(rewrite_urls(&post.body)),
+					..Default::default()
+				})
+				.collect::<Vec<_>>(),
+		)
+		.build();
+
+	// Serialize the feed to RSS
+	let body = channel.to_string().into_bytes();
+
+	// Create the HTTP response
+	let mut res = Response::new(Body::from(body));
+	res.headers_mut().insert(CONTENT_TYPE, hyper::header::HeaderValue::from_static("application/rss+xml"));
+
+	Ok(res)
+}
+
 #[tokio::test(flavor = "multi_thread")]
 async fn test_fetching_subreddit() {
 	let subreddit = subreddit("rust", false).await;

src/user.rs

@@ -2,6 +2,7 @@
 use crate::client::json;
 use crate::server::RequestExt;
 use crate::utils::{error, filter_posts, format_url, get_filters, nsfw_landing, param, setting, template, Post, Preferences, User};
+use crate::{config, utils};
 use askama::Template;
 use hyper::{Body, Request, Response};
 use time::{macros::format_description, OffsetDateTime};
@@ -129,6 +130,56 @@ async fn user(name: &str) -> Result<User, String> {
 	})
 }
 
+pub async fn rss(req: Request<Body>) -> Result<Response<Body>, String> {
+	if config::get_setting("REDLIB_ENABLE_RSS").is_none() {
+		return Ok(error(req, "RSS is disabled on this instance.").await.unwrap_or_default());
+	}
+	use crate::utils::rewrite_urls;
+	use hyper::header::CONTENT_TYPE;
+	use rss::{ChannelBuilder, Item};
+
+	// Get user
+	let user_str = req.param("name").unwrap_or_default();
+
+	let listing = req.param("listing").unwrap_or_else(|| "overview".to_string());
+
+	// Get path
+	let path = format!("/user/{user_str}/{listing}.json?{}&raw_json=1", req.uri().query().unwrap_or_default(),);
+
+	// Get user
+	let user_obj = user(&user_str).await.unwrap_or_default();
+
+	// Get posts
+	let (posts, _) = Post::fetch(&path, false).await?;
+
+	// Build the RSS feed
+	let channel = ChannelBuilder::default()
+		.title(user_str)
+		.description(user_obj.description)
+		.items(
+			posts
+				.into_iter()
+				.map(|post| Item {
+					title: Some(post.title.to_string()),
+					link: Some(utils::get_post_url(&post)),
+					author: Some(post.author.name),
+					content: Some(rewrite_urls(&post.body)),
+					..Default::default()
+				})
+				.collect::<Vec<_>>(),
+		)
+		.build();
+
+	// Serialize the feed to RSS
+	let body = channel.to_string().into_bytes();
+
+	// Create the HTTP response
+	let mut res = Response::new(Body::from(body));
+	res.headers_mut().insert(CONTENT_TYPE, hyper::header::HeaderValue::from_static("application/rss+xml"));
+
+	Ok(res)
+}
+
 #[tokio::test(flavor = "multi_thread")]
 async fn test_fetching_user() {
 	let user = user("spez").await;

src/utils.rs

@@ -1,5 +1,5 @@
 #![allow(dead_code)]
-use crate::config::get_setting;
+use crate::config::{self, get_setting};
 //
 // CRATES
 //
@@ -15,6 +15,7 @@ use serde_json::Value;
 use std::collections::{HashMap, HashSet};
 use std::env;
 use std::str::FromStr;
+use std::string::ToString;
 use time::{macros::format_description, Duration, OffsetDateTime};
 use url::Url;
 
@@ -327,6 +328,7 @@ pub struct Post {
 	pub gallery: Vec<GalleryMedia>,
 	pub awards: Awards,
 	pub nsfw: bool,
+	pub out_url: Option<String>,
 	pub ws_url: String,
 }
 
@@ -435,6 +437,7 @@ impl Post {
 				awards,
 				nsfw: post["data"]["over_18"].as_bool().unwrap_or_default(),
 				ws_url: val(post, "websocket_url"),
+				out_url: post["data"]["url_overridden_by_dest"].as_str().map(|a| a.to_string()),
 			});
 		}
 		Ok((posts, res["data"]["after"].as_str().unwrap_or_default().to_string()))
@@ -770,6 +773,7 @@ pub async fn parse_post(post: &Value) -> Post {
 		awards,
 		nsfw: post["data"]["over_18"].as_bool().unwrap_or_default(),
 		ws_url: val(post, "websocket_url"),
+		out_url: post["data"]["url_overridden_by_dest"].as_str().map(|a| a.to_string()),
 	}
 }
 
@@ -1082,6 +1086,16 @@ pub fn sfw_only() -> bool {
 	}
 }
 
+/// Returns true if the config/env variable REDLIB_ENABLE_RSS is set to "on".
+/// If this variable is set as such, the instance will enable RSS feeds.
+/// Otherwise, the instance will not provide RSS feeds.
+pub fn enable_rss() -> bool {
+	match get_setting("REDLIB_ENABLE_RSS") {
+		Some(val) => val == "on",
+		None => false,
+	}
+}
+
 // Determines if a request shoud redirect to a nsfw landing gate.
 pub fn should_be_nsfw_gated(req: &Request<Body>, req_url: &str) -> bool {
 	let sfw_instance = sfw_only();
@@ -1137,6 +1151,20 @@ pub fn url_path_basename(path: &str) -> String {
 	}
 }
 
+// Returns the URL of a post, as needed by RSS feeds
+pub fn get_post_url(post: &Post) -> String {
+	if let Some(out_url) = &post.out_url {
+		// Handle cross post
+		if out_url.starts_with("/r/") {
+			format!("{}{}", config::get_setting("REDLIB_FULL_URL").unwrap_or_default(), out_url)
+		} else {
+			out_url.to_string()
+		}
+	} else {
+		format!("{}{}", config::get_setting("REDLIB_FULL_URL").unwrap_or_default(), post.permalink)
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::{format_num, format_url, rewrite_urls};

templates/subreddit.html

@@ -130,7 +130,13 @@
 							</form>
 							{% endif %}
 						</div>
-					</div>
+						{% if crate::utils::enable_rss() %}
+						<div id="sub_rss">
+                            <a href="/r/{{ sub.name }}.rss" title="RSS feed for r/{{ sub.name }}">
+                                <button class="subscribe">RSS feed</button >
+                            </a>
+						</div>
+						{% endif %}
 				</div>
 			</details>
 			<details class="panel" id="sidebar">

templates/user.html

@@ -1,140 +1,178 @@
-{% extends "base.html" %}
+{% extends "base.html" %} {% import "utils.html" as utils %} {% block search %}
-{% import "utils.html" as utils %}
+{% call utils::search("".to_owned(), "") %} {% endblock %} {% block title %}{{
+user.name.replace("u/", "") }} (u/{{ user.name }}) - Redlib{% endblock %} {%
+block subscriptions %} {% call utils::sub_list("") %} {% endblock %} {% block
+body %}
+<main>
+    {% if !is_filtered %}
+    <div id="column_one">
+        <form id="sort">
+            <div id="listing_options">
+                {% call utils::sort(["/user/", user.name.as_str()].concat(),
+                ["overview", "comments", "submitted"], listing) %}
+            </div>
+            <select id="sort_select" name="sort">
+                {% call utils::options(sort.0, ["hot", "new", "top",
+                "controversial"], "") %}</select
+            >{% if sort.0 == "top" || sort.0 == "controversial" %}<select
+                id="timeframe"
+                name="t"
+            >
+                {% call utils::options(sort.1, ["hour", "day", "week", "month",
+                "year", "all"], "all") %}</select
+            >{% endif %}<button id="sort_submit" class="submit">
+                <svg
+                    width="15"
+                    viewBox="0 0 110 100"
+                    fill="none"
+                    stroke-width="10"
+                    stroke-linecap="round"
+                >
+                    <path d="M20 50 H100" />
+                    <path d="M75 15 L100 50 L75 85" />
+                    &rarr;
+                </svg>
+            </button>
+        </form>
 
-{% block search %}
+        {% if all_posts_hidden_nsfw %}
-	{% call utils::search("".to_owned(), "") %}
+        <center>
-{% endblock %}
+            All posts are hidden because they are NSFW. Enable "Show NSFW posts"
-
+            in settings to view.
-{% block title %}{{ user.name.replace("u/", "") }} (u/{{ user.name }}) - Redlib{% endblock %}
+        </center>
-
+        {% endif %} {% if no_posts %}
-{% block subscriptions %}
+        <center>No posts were found.</center>
-	{% call utils::sub_list("") %}
+        {% endif %} {% if all_posts_filtered %}
-{% endblock %}
+        <center>(All content on this page has been filtered)</center>
-
+        {% else %}
-{% block body %}
+        <div id="posts">
-	<main>
+            {% for post in posts %} {% if post.flags.nsfw && prefs.show_nsfw !=
-		{% if !is_filtered %}
+            "on" %} {% else if !post.title.is_empty() %} {% call
-		<div id="column_one">
+            utils::post_in_list(post) %} {% else %}
-			<form id="sort">
+            <div class="comment user-comment">
-				<div id="listing_options">
+                <div class="comment_left">
-					{% call utils::sort(["/user/", user.name.as_str()].concat(), ["overview", "comments", "submitted"], listing) %}
+                    <p class="comment_score" title="{{ post.score.1 }}">
-				</div>
+                        {% if prefs.hide_score != "on" %} {{ post.score.0 }} {%
-				<select id="sort_select" name="sort">
+                        else %} &#x2022; {% endif %}
-					{% call utils::options(sort.0, ["hot", "new", "top", "controversial"], "") %}
-				</select>{% if sort.0 == "top" || sort.0 == "controversial" %}<select id="timeframe" name="t">
-					{% call utils::options(sort.1, ["hour", "day", "week", "month", "year", "all"], "all") %}
-				</select>{% endif %}<button id="sort_submit" class="submit">
-					<svg width="15" viewBox="0 0 110 100" fill="none" stroke-width="10" stroke-linecap="round">
-						<path d="M20 50 H100" />
-						<path d="M75 15 L100 50 L75 85" />
-						&rarr;
-					</svg>
-				</button>
-			</form>
-
-			{% if all_posts_hidden_nsfw %}
-			<center>All posts are hidden because they are NSFW. Enable "Show NSFW posts" in settings to view.</center>
-			{% endif %}
-
-			{% if no_posts %}
-				<center>No posts were found.</center>
-			{% endif %}
-
-			{% if all_posts_filtered %}
-				 <center>(All content on this page has been filtered)</center>
-			{% else %}
-			<div id="posts">
-			{% for post in posts %}
-
-			{% if post.flags.nsfw && prefs.show_nsfw != "on" %}
-			{% else if !post.title.is_empty() %}
-			{% call utils::post_in_list(post) %}
-			{% else %}
-			<div class="comment user-comment">
-				<div class="comment_left">
-					<p class="comment_score" title="{{ post.score.1 }}">
-                    {% if prefs.hide_score != "on" %}
-                    {{ post.score.0 }}
-                    {% else %}
-                    &#x2022;
-                    {% endif %}
                     </p>
-					<div class="line"></div>
+                    <div class="line"></div>
-				</div>
+                </div>
-				<details class="comment_right" open>
+                <details class="comment_right" open>
-					<summary class="comment_data">
+                    <summary class="comment_data">
-                        <a class="comment_link" href="{{ post.permalink }}" title="{{ post.link_title }}">{{ post.link_title }}</a>
+                        <a
-						<div class="user_comment_data_divider">
+                            class="comment_link"
-							<span class="created-in">&nbsp;in&nbsp;</span>
+                            href="{{ post.permalink }}"
-							<a class="comment_subreddit" href="/r/{{ post.community }}">r/{{ post.community }}</a>
+                            title="{{ post.link_title }}"
-							<span class="dot">&bull;</span>
+                            >{{ post.link_title }}</a
-							<span class="created" title="{{ post.created }}">&nbsp;{{ post.rel_time }}</span>
+                        >
-						</div>
+                        <div class="user_comment_data_divider">
-					</summary>
+                            <span class="created-in">&nbsp;in&nbsp;</span>
-					<p class="comment_body">{{ post.body|safe }}</p>
+                            <a
-				</details>
+                                class="comment_subreddit"
-			</div>
+                                href="/r/{{ post.community }}"
-			{% endif %}
+                                >r/{{ post.community }}</a
-			{% endfor %}
+                            >
-			{% if prefs.use_hls == "on" %}
+                            <span class="dot">&bull;</span>
-			<script src="/hls.min.js"></script>
+                            <span class="created" title="{{ post.created }}"
-			<script src="/playHLSVideo.js"></script>
+                                >&nbsp;{{ post.rel_time }}</span
-			{% endif %}
+                            >
-			</div>
+                        </div>
-			{% endif %}
+                    </summary>
+                    <p class="comment_body">{{ post.body|safe }}</p>
+                </details>
+            </div>
+            {% endif %} {% endfor %} {% if prefs.use_hls == "on" %}
+            <script src="/hls.min.js"></script>
+            <script src="/playHLSVideo.js"></script>
+            {% endif %}
+        </div>
+        {% endif %}
 
-			<footer>
+        <footer>
-				{% if ends.0 != "" %}
+            {% if ends.0 != "" %}
-				<a href="?sort={{ sort.0 }}&t={{ sort.1 }}&before={{ ends.0 }}" accesskey="P">PREV</a>
+            <a
-				{% endif %}
+                href="?sort={{ sort.0 }}&t={{ sort.1 }}&before={{ ends.0 }}"
-
+                accesskey="P"
-				{% if ends.1 != "" %}
+                >PREV</a
-				<a href="?sort={{ sort.0 }}&t={{ sort.1 }}&after={{ ends.1 }}" accesskey="N">NEXT</a>
+            >
-				{% endif %}
+            {% endif %} {% if ends.1 != "" %}
-			</footer>
+            <a
-		</div>
+                href="?sort={{ sort.0 }}&t={{ sort.1 }}&after={{ ends.1 }}"
-		{% endif %}
+                accesskey="N"
-		<aside>
+                >NEXT</a
-			{% if is_filtered %}
+            >
-			<center>(Content from u/{{ user.name }} has been filtered)</center>
+            {% endif %}
-			{% endif %}
+        </footer>
-			<div class="panel" id="user">
+    </div>
-				<img loading="lazy" id="user_icon" src="{{ user.icon }}" alt="User icon">
+    {% endif %}
-				<h1 id="user_title">{{ user.title }}</h1>
+    <aside>
-				<p id="user_name">u/{{ user.name }}</p>
+        {% if is_filtered %}
-				<div id="user_description">{{ user.description }}</div>
+        <center>(Content from u/{{ user.name }} has been filtered)</center>
-				<div id="user_details">
+        {% endif %}
-					<label>Karma</label>
+        <div class="panel" id="user">
-					<label>Created</label>
+            <img
-					<div>{{ user.karma }}</div>
+                loading="lazy"
-					<div>{{ user.created }}</div>
+                id="user_icon"
-				</div>
+                src="{{ user.icon }}"
-				<div id="user_actions">
+                alt="User icon"
-				{% let name = ["u_", user.name.as_str()].join("") %}
+            />
-				<div id="user_subscription">
+            <h1 id="user_title">{{ user.title }}</h1>
-					{% if prefs.subscriptions.contains(name) %}
+            <p id="user_name">u/{{ user.name }}</p>
-						<form action="/r/{{ name }}/unsubscribe?redirect={{ redirect_url }}" method="POST">
+            <div id="user_description">{{ user.description }}</div>
-							<button class="unsubscribe">Unfollow</button>
+            <div id="user_details">
-						</form>
+                <label>Karma</label>
-					{% else %}
+                <label>Created</label>
-						<form action="/r/{{ name }}/subscribe?redirect={{ redirect_url }}" method="POST">
+                <div>{{ user.karma }}</div>
-							<button class="subscribe">Follow</button>
+                <div>{{ user.created }}</div>
-						</form>
+            </div>
-					{% endif %}
+            <div id="user_actions">
-					</div>
+                {% let name = ["u_", user.name.as_str()].join("") %}
-					<div id="user_filter">
+                <div id="user_subscription">
-						{% if prefs.filters.contains(name) %}
+                    {% if prefs.subscriptions.contains(name) %}
-							<form action="/r/{{ name }}/unfilter?redirect={{ redirect_url }}" method="POST">
+                    <form
-								<button class="unfilter">Unfilter</button>
+                        action="/r/{{ name }}/unsubscribe?redirect={{ redirect_url }}"
-							</form>
+                        method="POST"
-						{% else %}
+                    >
-							<form action="/r/{{ name }}/filter?redirect={{ redirect_url }}" method="POST">
+                        <button class="unsubscribe">Unfollow</button>
-								<button class="filter">Filter</button>
+                    </form>
-							</form>
+                    {% else %}
-						{% endif %}
+                    <form
-					</div>
+                        action="/r/{{ name }}/subscribe?redirect={{ redirect_url }}"
-				</div>
+                        method="POST"
-			</div>
+                    >
-		</aside>
+                        <button class="subscribe">Follow</button>
-	</main>
+                    </form>
+                    {% endif %}
+                </div>
+                <div id="user_filter">
+                    {% if prefs.filters.contains(name) %}
+                    <form
+                        action="/r/{{ name }}/unfilter?redirect={{ redirect_url }}"
+                        method="POST"
+                    >
+                        <button class="unfilter">Unfilter</button>
+                    </form>
+                    {% else %}
+                    <form
+                        action="/r/{{ name }}/filter?redirect={{ redirect_url }}"
+                        method="POST"
+                    >
+                        <button class="filter">Filter</button>
+                    </form>
+                    {% endif %}
+                </div>
+                {% if crate::utils::enable_rss() %}
+                <div id="user_rss">
+                    <a
+                        href="/u/{{ user.name }}.rss"
+                        title="RSS feed for u/{{ user.name }}"
+                    >
+                        <button class="subscribe">RSS feed</button>
+                    </a>
+                </div>
+                {% endif %}
+            </div>
+        </div>
+    </aside>
+</main>
 {% endblock %}