Encode html as base64 & return JSON
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parent
597baba21b
commit
266c16b9a8
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@ -98,6 +98,12 @@ dependencies = [
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"rustc-demangle",
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]
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[[package]]
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name = "base64"
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version = "0.22.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
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[[package]]
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name = "bytes"
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version = "1.7.1"
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@ -294,7 +300,10 @@ name = "manserve"
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version = "0.1.0"
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dependencies = [
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"axum",
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"base64",
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"http-body-util",
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"serde",
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"serde_json",
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"tokio",
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"tower 0.5.0",
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"tracing-subscriber",
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@ -5,7 +5,10 @@ edition = "2021"
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[dependencies]
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axum = "0.7.5"
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base64 = "0.22.1"
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http-body-util = "0.1.2"
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serde = { version = "1.0.209", features = ["derive"] }
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serde_json = "1.0.127"
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tokio = { version = "1.39.3", features = ["rt-multi-thread"] }
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tower = { version = "0.5.0", features = ["limit", "buffer"] }
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tracing-subscriber = "0.3.18"
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225
src/main.rs
225
src/main.rs
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@ -1,88 +1,191 @@
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use std::{
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env,
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env, io,
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process::{exit, Command},
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string::FromUtf8Error,
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time::Duration,
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};
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use axum::{
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error_handling::HandleErrorLayer, extract::Path, http::StatusCode, response::Html,
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routing::get, BoxError, Router,
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error_handling::HandleErrorLayer,
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extract::Path,
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http::{header, StatusCode},
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response::IntoResponse,
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routing::get,
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BoxError, Router,
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};
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use base64::{engine::general_purpose::STANDARD, Engine};
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use serde::Deserialize;
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use tower::{buffer::BufferLayer, limit::rate::RateLimitLayer, ServiceBuilder};
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#[tokio::main]
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async fn main() {
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// initialize tracing
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tracing_subscriber::fmt::init();
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// idk how to have one rate limiting block apply to both of these but this works so it's fine
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let app = Router::new()
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.route(
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"/:name",
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get(command).layer(
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ServiceBuilder::new()
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.layer(HandleErrorLayer::new(|err: BoxError| async move {
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(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("Unhandled error: {err}"),
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)
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}))
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.layer(BufferLayer::new(1024))
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.layer(RateLimitLayer::new(5, Duration::from_secs(1))),
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),
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)
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.route(
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"/",
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get(StatusCode::BAD_REQUEST).layer(
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ServiceBuilder::new()
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.layer(HandleErrorLayer::new(|err: BoxError| async move {
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(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("Unhandled error: {err}"),
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)
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}))
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.layer(BufferLayer::new(1024))
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.layer(RateLimitLayer::new(5, Duration::from_secs(1))),
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),
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);
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let args: Vec<String> = env::args().collect();
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if args.len() < 2 {
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println!("Provide a port with manserve $PORT");
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exit(1);
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}
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if args[1].parse::<u16>().is_ok() {
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let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", args[1]))
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.await
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.unwrap();
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println!("Starting server on port {}", args[1]);
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axum::serve(listener, app).await.unwrap();
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} else {
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if args[1].parse::<u16>().is_err() {
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println!("Could not parse port {}", args[1]);
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exit(1);
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}
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let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", args[1]))
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.await
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.unwrap();
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println!("Starting server on port {}", args[1]);
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axum::serve(listener, app()).await.unwrap();
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}
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async fn command(Path(name): Path<String>) -> Result<Html<String>, StatusCode> {
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let mut manpage_loc = String::from_utf8(
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Command::new("man")
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.args(["-w", name.as_str()])
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.output()
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.unwrap()
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.stdout,
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)
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.unwrap();
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manpage_loc.pop();
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let man = Command::new("mandoc")
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fn app() -> Router {
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Router::new()
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.layer(
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// Throttle incoming traffic
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ServiceBuilder::new()
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.layer(HandleErrorLayer::new(|err: BoxError| async move {
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(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("Unhandled error: {err}"),
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)
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}))
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.layer(BufferLayer::new(1024))
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.layer(RateLimitLayer::new(5, Duration::from_secs(1))),
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)
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.route("/:command", get(command))
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}
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#[derive(Deserialize, Debug)]
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struct Manpage {
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command: String,
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html: String,
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}
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#[derive(Debug)]
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enum ManserveErr {
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NotFound,
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IOError,
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InvalidUtf,
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}
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impl From<io::Error> for ManserveErr {
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fn from(_value: io::Error) -> Self {
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ManserveErr::IOError
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}
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}
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impl From<FromUtf8Error> for ManserveErr {
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fn from(_value: FromUtf8Error) -> Self {
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ManserveErr::InvalidUtf
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}
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}
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fn get_man_loc(command: &str) -> Result<String, ManserveErr> {
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let output = Command::new("man").args(["-w", command]).output()?;
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if !output.status.success() {
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return Err(ManserveErr::NotFound);
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}
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let mut loc = String::from_utf8(output.stdout)?;
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loc.pop();
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Ok(loc)
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}
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fn generate_html(command: &str) -> Result<String, ManserveErr> {
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let man_page = get_man_loc(command)?;
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let output = Command::new("mandoc")
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.arg("-Thtml")
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.arg("-O")
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.arg("fragment")
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.arg(manpage_loc)
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.output()
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.unwrap();
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match man.status.success() {
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true => Ok(Html(String::from_utf8(man.stdout).unwrap())),
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false => Err(StatusCode::BAD_REQUEST),
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.arg(man_page.as_str())
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.output()?;
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let encoded = STANDARD.encode(String::from_utf8(output.stdout)?);
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Ok(encoded)
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}
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async fn command(Path(command): Path<String>) -> impl IntoResponse {
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let command = command.as_str();
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match generate_html(command) {
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Ok(html) => {
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let json = format!("{{\"command\": \"{command}\", \"html\": \"{html}\"}}");
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(
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StatusCode::OK,
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[(header::CONTENT_TYPE, "text/json")],
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json.into_response(),
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)
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}
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Err(error) => match error {
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ManserveErr::NotFound => {
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let json = format!("{{\"command\": \"{command}\", \"error\": \"Could not find the requested command\"}}");
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(
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StatusCode::NOT_FOUND,
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[(header::CONTENT_TYPE, "text/json")],
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json.into_response(),
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)
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}
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ManserveErr::IOError => {
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let json = format!("{{\"command\": \"{command}\", \"error\": \"The server could not complete the request\"}}");
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(
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StatusCode::INTERNAL_SERVER_ERROR,
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[(header::CONTENT_TYPE, "text/json")],
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json.into_response(),
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)
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}
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ManserveErr::InvalidUtf => {
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let json = format!("{{\"command\": \"{command}\", \"error\": \"There was invalid utf-8 in the request\"}}");
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(
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StatusCode::BAD_REQUEST,
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[(header::CONTENT_TYPE, "text/json")],
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json.into_response(),
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)
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}
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},
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}
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}
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#[cfg(test)]
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mod tests {
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use axum::{body::Body, http::Request};
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use http_body_util::BodyExt;
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use tower::Service;
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use super::*;
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#[tokio::test]
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async fn json() {
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let mut app = app();
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let res = app
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.call(Request::builder().uri("/ls").body(Body::default()).unwrap())
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.await
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.unwrap();
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assert_eq!(res.status(), StatusCode::OK)
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}
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#[tokio::test]
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async fn bad_command() {
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let mut app = app();
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let res = app
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.call(
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Request::builder()
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.uri("/lollll")
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.body(Body::default())
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.unwrap(),
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)
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.await
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.unwrap();
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assert_eq!(res.status(), StatusCode::NOT_FOUND)
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}
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#[tokio::test]
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async fn man_ls() {
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let mut app = app();
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let res = app
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.call(Request::builder().uri("/ls").body(Body::default()).unwrap())
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.await
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.unwrap();
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let expected = generate_html("ls").unwrap();
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let res_str =
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String::from_utf8(res.into_body().collect().await.unwrap().to_bytes().into()).unwrap();
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let manpage: Manpage = serde_json::from_str(&res_str).unwrap();
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assert_eq!(manpage.html, expected)
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}
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}
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