initial commit

10 files changed, 1223 insertions, 0 deletions

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..894571b
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,3 @@
+source_url "https://raw.githubusercontent.com/cachix/devenv/82c0147677e510b247d8b9165c54f73d32dfd899/direnvrc" "sha256-7u4iDd1nZpxL4tCzmPG0dQgC5V+/44Ba+tHkPob1v2k="
+
+use devenv
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..54bb18f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+/target
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a982572
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "slab"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f92a496fb766b417c996b9c5e57daf2f7ad3b0bebe1ccfca4856390e3d3bb67"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "smallvec"
+version = "1.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+
+[[package]]
+name = "socket2"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c970269d99b64e60ec3bd6ad27270092a5394c4e309314b18ae3fe575695fbe8"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.96"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5d0adab1ae378d7f53bdebc67a39f1f151407ef230f0ce2883572f5d8985c80"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+]
+
+[[package]]
+name = "tokio"
+version = "1.43.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d61fa4ffa3de412bfea335c6ecff681de2b609ba3c77ef3e00e521813a9ed9e"
+dependencies = [
+ "backtrace",
+ "bytes",
+ "libc",
+ "mio",
+ "parking_lot",
+ "pin-project-lite",
+ "signal-hook-registry",
+ "socket2",
+ "tokio-macros",
+ "windows-sys",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7fcaa8d55a2bdd6b83ace262b016eca0d79ee02818c5c1bcdf0305114081078"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tower-service"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3"
+
+[[package]]
+name = "tracing"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
+dependencies = [
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "395ae124c09f9e6918a2310af6038fba074bcf474ac352496d5910dd59a2226d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e672c95779cf947c5311f83787af4fa8fffd12fb27e4993211a84bdfd9610f9c"
+dependencies = [
+ "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
+[[package]]
+name = "try-lock"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
+
+[[package]]
+name = "valuable"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
+
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..87061ab
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "pitch-lake"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+http-body-util = "0.1.2"
+hyper = { version = "1.5.2", features = ["full"] }
+hyper-util = { version = "0.1.10", features = ["full"] }
+rand = "0.8.5"
+rand_pcg = "0.3.1"
+rand_seeder = "0.3.0"
+tokio = { version = "1.43.0", features = ["full"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..4983385
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,100 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1737028622,
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "4e5b00134bf03f16af6b25b80abb38c598cfe239",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1733328505,
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "ff81ac966bb2cae68946d5ed5fc4994f96d0ffec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1733477122,
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "7bd9e84d0452f6d2e63b6e6da29fe73fac951857",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1737043064,
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "94ee657f6032d913fe0ef49adaa743804635b0bb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs",
+        "pre-commit-hooks": "pre-commit-hooks"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..234bd79
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,12 @@
+{
+  pkgs,
+  lib,
+  config,
+  inputs,
+  ...
+}: let
+  dictionaryFile = import ./dictionary.nix {pkgs = pkgs;};
+in {
+  env.DICTIONARY_FILE_PATH = dictionaryFile;
+  languages.rust.enable = true;
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..116a2ad
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,15 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allowUnfree to true.
+# allowUnfree: true
+
+# If you're willing to use a package that's vulnerable
+# permittedInsecurePackages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend
diff --git a/dictionary.nix b/dictionary.nix
new file mode 100644
index 0000000..5f1b912
--- /dev/null
+++ b/dictionary.nix
@@ -0,0 +1,5 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.fetchurl {
+  url = "https://raw.githubusercontent.com/dwyl/english-words/20f5cc9b3f0ccc8ce45d814c532b7c2031bba31c/words_alpha.txt";
+  hash = "sha256-PtDJRhDYvPfBG7tJxWqknHI00ytmgk35H1VBaeVy2kg=";
+}
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..bb2f947
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1,5 @@
+max_width = 80
+merge_imports = true
+imports_layout = "Vertical"
+hard_tabs = true
+tab_spaces = 2
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..766bc4b
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,179 @@
+use std::collections::HashSet;
+use std::future::Future;
+use std::net::SocketAddr;
+use std::ops::RangeInclusive;
+use std::pin::Pin;
+use std::process::ExitCode;
+use std::sync::Arc;
+
+use http_body_util::Full;
+use hyper::body::Bytes;
+use hyper::server::conn::http1;
+use hyper::service::Service;
+use hyper::{Request, Response, StatusCode};
+use hyper_util::rt::TokioIo;
+use rand::prelude::*;
+use rand_pcg::Pcg64;
+use rand_seeder::Seeder;
+use tokio::net::TcpListener;
+
+#[tokio::main]
+async fn main() -> Result<ExitCode, Box<dyn std::error::Error + Send + Sync>> {
+	let args: Vec<String> = std::env::args().collect();
+
+	if args.len() != 2 {
+		eprintln!("must supply exactly one arg for the seed");
+		return Ok(ExitCode::FAILURE);
+	}
+	let seed = args.get(1).unwrap();
+	eprintln!("seed: {}", seed);
+
+	tracing_subscriber::fmt::init();
+
+	let svc = RandomPageService::new(seed.as_str());
+
+	let addr = SocketAddr::from(([127, 0, 0, 1], 3200));
+
+	let listener = TcpListener::bind(addr).await?;
+
+	loop {
+		let (stream, _) = listener.accept().await?;
+
+		let io = TokioIo::new(stream);
+
+		let svc = svc.clone();
+
+		tokio::task::spawn(async move {
+			if let Err(err) = http1::Builder::new().serve_connection(io, svc).await {
+				eprintln!("Error serving connection: {:?}", err);
+			}
+		});
+	}
+}
+
+#[derive(Debug, Clone)]
+struct RandomPageService {
+	pub seed: String,
+	pub dict: Arc<Vec<&'static str>>,
+	pub dict_set: Arc<HashSet<&'static str>>,
+}
+
+impl RandomPageService {
+	pub fn new(seed: &str) -> Self {
+		let dictionary_data = include_bytes!(env!("DICTIONARY_FILE_PATH"));
+		let dictionary_string: &'static str =
+			std::str::from_utf8(dictionary_data).unwrap();
+		Self {
+			seed: seed.to_string(),
+			dict: Arc::new(dictionary_string.split_whitespace().collect()),
+			dict_set: Arc::new(dictionary_string.split_whitespace().collect()),
+		}
+	}
+}
+
+impl Service<Request<hyper::body::Incoming>> for RandomPageService {
+	type Response = Response<Full<Bytes>>;
+	type Error = hyper::Error;
+
+	type Future =
+		Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
+
+	fn call(&self, req: Request<hyper::body::Incoming>) -> Self::Future {
+		fn mk_response(
+			s: String,
+			status_code: StatusCode,
+		) -> Result<Response<Full<Bytes>>, hyper::Error> {
+			Ok(
+				Response::builder()
+					.status(status_code)
+					.body(Full::new(Bytes::from(s)))
+					.unwrap(),
+			)
+		}
+
+		let path = req.uri().path();
+
+		tracing::info!(path, "path");
+
+		let path_segments = path.split('/').filter(|v| v.len() > 0);
+
+		for segment in path_segments {
+			if !self.dict_set.contains(segment) {
+				return Box::pin(async {
+					mk_response("not found".to_string(), StatusCode::NOT_FOUND)
+				});
+			}
+		}
+
+		let res_body = build_page(&self.seed, path, &self.dict);
+
+		let res = mk_response(res_body, StatusCode::OK);
+
+		Box::pin(async { res })
+	}
+}
+
+const MAX_ROUTE_SEGMENTS: usize = 6;
+const PARAGRAPH_WORDS: RangeInclusive<usize> = 10..=200;
+const N_LINKS: RangeInclusive<usize> = 3..=10;
+
+pub fn build_page(
+	base_seed: &str,
+	route: &str,
+	dictionary: &[&'static str],
+) -> String {
+	let mut rng: Pcg64 =
+		Seeder::from(format!("{}---{}", base_seed, route)).make_rng();
+	let n_words = rng.gen_range(PARAGRAPH_WORDS);
+	let n_links = rng.gen_range(N_LINKS);
+
+	let random_paragraph = (0..n_words)
+		.map(|_| random_word(&mut rng, dictionary))
+		.collect::<Vec<&str>>()
+		.join(" ");
+
+	let random_links = (0..n_links)
+		.map(|_| random_route_link(&mut rng, dictionary))
+		.map(|link| format!("<p>{}</p>", link))
+		.collect::<Vec<String>>()
+		.join("\n");
+
+	format!(
+		r#"
+			<html>
+				<head>
+				</head>
+				<body>
+					<p>{}</p>
+					{}
+				</body>
+			</html>
+		"#,
+		random_paragraph, random_links,
+	)
+}
+
+fn random_route_link(rng: &mut Pcg64, dictionary: &[&'static str]) -> String {
+	let n_segments = rng.gen_range(1..=MAX_ROUTE_SEGMENTS);
+	let random_route = (0..n_segments)
+		.map(|_| random_word(rng, dictionary))
+		.collect::<Vec<&str>>()
+		.join("/");
+	let label = random_word(rng, dictionary);
+	format!("<a href=\"/{}\">{}</a>", random_route, label)
+}
+
+pub fn random_word(
+	rng: &mut Pcg64,
+	dictionary: &[&'static str],
+) -> &'static str {
+	let i = rng.gen_range(0..dictionary.len());
+	dictionary[i]
+}
+
+pub fn build_dict() -> Vec<&'static str> {
+	let dictionary_data = include_bytes!(env!("DICTIONARY_FILE_PATH"));
+	let dictionary_string: &'static str =
+		std::str::from_utf8(dictionary_data).unwrap();
+	dictionary_string.split_whitespace().collect()
+}