WIP: full gemini support

- DomainNotFound needs to be handled. Probably makes sense to not
  generate certs for unconfigured domains, to prevent DOS.

- Probably needs more testing.

Cargo.lock

@@ -111,6 +111,12 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bddcadddf5e9015d310179a59bb28c4d4b9920ad0f11e8e14dbadf654890c9a6"
 
+[[package]]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+
 [[package]]
 name = "arrayvec"
 version = "0.7.2"
@@ -158,6 +164,18 @@ version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24a6904aef64d73cf10ab17ebace7befb918b82164785cb89907993be7f83813"
 
+[[package]]
+name = "bitvec"
+version = "0.19.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55f93d0ef3363c364d5976646a38f04cf67cfe1d4c8d160cdea02cab2c116b33"
+dependencies = [
+ "funty",
+ "radium",
+ "tap",
+ "wyz",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -458,9 +476,11 @@ name = "domani"
 version = "0.1.0"
 dependencies = [
  "acme2",
+ "bytes",
  "clap",
  "env_logger",
  "futures",
+ "gemini",
  "gix",
  "handlebars",
  "hex",
@@ -660,6 +680,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
+[[package]]
+name = "funty"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fed34cd105917e91daa4da6b3728c47b068749d6a62c59811f06ed2ac71d9da7"
+
 [[package]]
 name = "futures"
 version = "0.3.28"
@@ -749,6 +775,18 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "gemini"
+version = "0.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12a820f5a9ac6f433b34944dc8d17b759d5009275c8fe12f73b873153dbcd4e0"
+dependencies = [
+ "nom 6.1.2",
+ "paste",
+ "thiserror",
+ "url",
+]
+
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -828,7 +866,7 @@ dependencies = [
  "btoi",
  "gix-date",
  "itoa",
- "nom",
+ "nom 7.1.3",
  "thiserror",
 ]
 
@@ -891,7 +929,7 @@ dependencies = [
  "gix-sec",
  "log",
  "memchr",
- "nom",
+ "nom 7.1.3",
  "once_cell",
  "smallvec",
  "thiserror",
@@ -1100,7 +1138,7 @@ dependencies = [
  "gix-validate",
  "hex",
  "itoa",
- "nom",
+ "nom 7.1.3",
  "smallvec",
  "thiserror",
 ]
@@ -1195,7 +1233,7 @@ dependencies = [
  "gix-hash",
  "gix-transport",
  "maybe-async",
- "nom",
+ "nom 7.1.3",
  "thiserror",
 ]
 
@@ -1226,7 +1264,7 @@ dependencies = [
  "gix-tempfile",
  "gix-validate",
  "memmap2",
- "nom",
+ "nom 7.1.3",
  "thiserror",
 ]
 
@@ -1767,6 +1805,19 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "lexical-core"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6607c62aa161d23d17a9072cc5da0be67cdfc89d3afb1e8d9c842bebc2525ffe"
+dependencies = [
+ "arrayvec 0.5.2",
+ "bitflags 1.3.2",
+ "cfg-if",
+ "ryu",
+ "static_assertions",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.142"
@@ -1954,6 +2005,19 @@ dependencies = [
  "smallvec",
 ]
 
+[[package]]
+name = "nom"
+version = "6.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7413f999671bd4745a7b624bd370a569fb6bc574b23c83a3c5ed2e453f3d5e2"
+dependencies = [
+ "bitvec",
+ "funty",
+ "lexical-core",
+ "memchr",
+ "version_check",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -2081,6 +2145,12 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
+
 [[package]]
 name = "pem"
 version = "2.0.1"
@@ -2249,6 +2319,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "radium"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "941ba9d78d8e2f7ce474c015eea4d9c6d25b6a3327f9832ee29a4de27f91bbb8"
+
 [[package]]
 name = "radix_trie"
 version = "0.2.1"
@@ -2805,6 +2881,12 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tap"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+
 [[package]]
 name = "tempdir"
 version = "0.3.7"
@@ -3121,7 +3203,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "794a32261a1f5eb6a4462c81b59cec87b5c27d5deea7dd1ac8fc781c41d226db"
 dependencies = [
- "arrayvec",
+ "arrayvec 0.7.2",
 ]
 
 [[package]]
@@ -3508,3 +3590,9 @@ checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
 dependencies = [
  "winapi",
 ]
+
+[[package]]
+name = "wyz"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"

Cargo.toml

@@ -31,7 +31,7 @@ mime_guess = "2.0.4"
 hyper = { version = "0.14.26", features = [ "server", "stream" ]}
 http = "0.2.9"
 serde_urlencoded = "0.7.1"
-tokio-util = "0.7.8"
+tokio-util = { version = "0.7.8", features = [ "io" ]}
 acme2 = "0.5.1"
 openssl = "0.10.52"
 rustls = "0.21.1"
@@ -45,6 +45,8 @@ serde_yaml = "0.9.22"
 rand = "0.8.5"
 reqwest = "0.11.18"
 hyper-reverse-proxy = "0.5.1"
+gemini = "0.0.5"
+bytes = "1.4.0"
 
 [patch.crates-io]
 tokio-rustls = { git = "https://code.betamike.com/micropelago/tokio-rustls.git", branch = "start-handshake-into-inner" }

src/main.rs

@@ -151,6 +151,7 @@ async fn main() {
 
     let _ = domani::service::gemini::Service::new(
         &mut task_stack,
+        domain_manager.clone(),
         sync::Arc::new(domain_gemini_store),
         config.service,
     );

src/origin/git.rs

@@ -332,7 +332,7 @@ impl super::Store for FSStore {
 
         // TODO this is very not ideal, the whole file is first read totally into memory, and then
         // that is cloned.
-        let data = file_object.data.clone();
+        let data = bytes::Bytes::copy_from_slice(file_object.data.as_slice());
         Ok(Box::pin(stream::once(async move { Ok(data) })))
     }
 }

src/service.rs

@@ -3,3 +3,32 @@ pub mod gemini;
 pub mod http;
 
 pub use config::*;
+
+use std::borrow;
+
+fn append_index_to_path<'path, 'index>(
+    path: &'path str,
+    index: &'index str,
+) -> borrow::Cow<'path, str> {
+    if path.len() == 0 {
+        let mut path = String::with_capacity(1 + index.len());
+        path.push('/');
+        path.push_str(index);
+        return borrow::Cow::Owned(path);
+    }
+
+    if path.ends_with('/') {
+        let mut indexed_path = String::with_capacity(path.len() + index.len());
+        indexed_path.push_str(path.as_ref());
+        indexed_path.push_str(index);
+        return borrow::Cow::Owned(indexed_path);
+    }
+
+    borrow::Cow::Borrowed(path)
+}
+
+fn guess_mime(path: &str) -> String {
+    mime_guess::from_path(path)
+        .first_or_octet_stream()
+        .to_string()
+}

src/service/gemini.rs

@@ -4,12 +4,13 @@ mod proxy;
 pub use config::*;
 
 use crate::error::unexpected::{self, Mappable};
-use crate::{domain, service, task_stack};
+use crate::{domain, service, task_stack, util};
 
 use std::sync;
 use tokio_util::sync::CancellationToken;
 
 pub struct Service {
+    domain_manager: sync::Arc<dyn domain::manager::Manager>,
     cert_resolver: sync::Arc<dyn rustls::server::ResolvesServerCert>,
     config: service::Config,
 }
@@ -26,10 +27,12 @@ enum HandleConnError {
 impl Service {
     pub fn new(
         task_stack: &mut task_stack::TaskStack<unexpected::Error>,
+        domain_manager: sync::Arc<dyn domain::manager::Manager>,
         cert_resolver: sync::Arc<dyn rustls::server::ResolvesServerCert>,
         config: service::Config,
     ) -> sync::Arc<Service> {
         let service = sync::Arc::new(Service {
+            domain_manager,
             cert_resolver,
             config,
         });
@@ -37,6 +40,72 @@ impl Service {
         service
     }
 
+    async fn respond_conn<W>(
+        &self,
+        w: W,
+        code: &str,
+        meta: &str,
+        body: Option<util::BoxByteStream>,
+    ) -> unexpected::Result<()>
+    where
+        W: tokio::io::AsyncWrite + Unpin,
+    {
+        use tokio::io::{copy, AsyncWriteExt, BufWriter};
+        let mut w = BufWriter::new(w);
+
+        w.write_all(code.as_bytes()).await.or_unexpected()?;
+        w.write_all(" ".as_bytes()).await.or_unexpected()?;
+        w.write_all(meta.as_bytes()).await.or_unexpected()?;
+        w.write_all("\r\n".as_bytes()).await.or_unexpected()?;
+
+        if let Some(body) = body {
+            let mut body = tokio_util::io::StreamReader::new(body);
+            copy(&mut body, &mut w).await.or_unexpected()?;
+        }
+
+        w.flush().await.or_unexpected()?;
+
+        Ok(())
+    }
+
+    async fn serve_conn<IO>(&self, domain: &domain::Name, conn: IO) -> Result<(), HandleConnError>
+    where
+        IO: tokio::io::AsyncRead + tokio::io::AsyncWrite + Unpin,
+    {
+        use tokio::io::*;
+
+        let (r, w) = split(conn);
+        let mut r = BufReader::new(r);
+
+        let mut req = String::with_capacity(64);
+        r.read_line(&mut req)
+            .await
+            .map_err(|e| HandleConnError::ClientError(format!("failed to read request: {e}")))?;
+
+        let req = gemini::request::parse::request(req.as_bytes())
+            .map(|(_, req)| req)
+            .map_err(|e| HandleConnError::ClientError(format!("failed to parse request: {e}")))?
+            .into_gemini_request()
+            .map_err(|e| HandleConnError::ClientError(format!("failed to parse request: {e}")))?;
+
+        let path = service::append_index_to_path(req.path(), "index.gmi");
+
+        let f = match self.domain_manager.get_file(domain, &path) {
+            Ok(f) => f,
+            Err(domain::manager::GetFileError::DomainNotFound) => panic!("TODO"),
+            Err(domain::manager::GetFileError::FileNotFound) => {
+                return Ok(self.respond_conn(w, "51", "File not found", None).await?)
+            }
+            Err(domain::manager::GetFileError::Unexpected(e)) => return Err(e.into()),
+        };
+
+        let content_type = service::guess_mime(&path);
+
+        Ok(self
+            .respond_conn(w, "20", content_type.as_str(), Some(f))
+            .await?)
+    }
+
     async fn proxy_conn<IO>(
         &self,
         proxied_domain: &ConfigProxiedDomain,
@@ -59,7 +128,7 @@ impl Service {
     async fn handle_conn(
         &self,
         conn: tokio::net::TcpStream,
-        _tls_config: sync::Arc<rustls::ServerConfig>,
+        tls_config: sync::Arc<rustls::ServerConfig>,
     ) -> Result<(), HandleConnError> {
         let teed_conn = {
             let (r, w) = tokio::io::split(conn);
@@ -92,9 +161,8 @@ impl Service {
                     return Ok(());
                 }
 
-                return Err(HandleConnError::ClientError(format!(
+                let conn = start.into_stream(tls_config).await.or_unexpected()?;
-                    "unknown domain {domain}"
+                self.serve_conn(&domain, conn).await
-                )));
             }
             Err(err) => {
                 return Err(unexpected::Error::from(
@@ -113,7 +181,7 @@ async fn listen(
     let tls_config = sync::Arc::new(
         rustls::server::ServerConfig::builder()
             .with_safe_defaults()
-            .with_no_client_auth() // TODO maybe this isn't right?
+            .with_no_client_auth()
             .with_cert_resolver(service.cert_resolver.clone()),
     );
 

src/service/http.rs

@@ -79,13 +79,9 @@ struct DomainSyncArgs {
 
 impl<'svc> Service {
     fn serve(&self, status_code: u16, path: &str, body: Body) -> Response<Body> {
-        let content_type = mime_guess::from_path(path)
-            .first_or_octet_stream()
-            .to_string();
-
         match Response::builder()
             .status(status_code)
-            .header("Content-Type", content_type)
+            .header("Content-Type", service::guess_mime(path))
             .body(body)
         {
             Ok(res) => res,
@@ -161,20 +157,10 @@ impl<'svc> Service {
     }
 
     async fn serve_origin(&self, domain: domain::Name, req: Request<Body>) -> Response<Body> {
-        let mut path_owned;
+        let path = service::append_index_to_path(req.uri().path(), "index.html");
-        let path = req.uri().path();
 
-        let path = match path.ends_with('/') {
+        match self.domain_manager.get_file(&domain, &path) {
-            true => {
+            Ok(f) => self.serve(200, &path, Body::wrap_stream(f)),
-                path_owned = String::from(path);
-                path_owned.push_str("index.html");
-                path_owned.as_str()
-            }
-            false => path,
-        };
-
-        match self.domain_manager.get_file(&domain, path) {
-            Ok(f) => self.serve(200, path, Body::wrap_stream(f)),
             Err(domain::manager::GetFileError::DomainNotFound) => {
                 return self.render_error_page(404, "Domain not found")
             }

src/util.rs

@@ -10,6 +10,6 @@ pub fn open_file(path: &path::Path) -> io::Result<Option<fs::File>> {
     }
 }
 
-pub type BoxByteStream = futures::stream::BoxStream<'static, io::Result<Vec<u8>>>;
+pub type BoxByteStream = futures::stream::BoxStream<'static, io::Result<bytes::Bytes>>;
 
 pub type BoxFuture<'a, O> = pin::Pin<Box<dyn futures::Future<Output = O> + Send + 'a>>;