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use crate::args::Args;
use crate::errors::*;
use crate::security;
use crate::utils;
use actix_files::NamedFile;
use actix_web::{
get, http::header, middleware, web, App, HttpRequest, HttpResponse, HttpServer, Responder,
};
use libtor::TorAddress;
use std::borrow::Cow;
use std::fs;
use std::path::Component;
use std::path::Path;
use std::path::PathBuf;
const DIR_LIST_PADDING: usize = 50;
pub struct Config {
web_root: String,
list_directories: bool,
}
fn resolve_path_req(base: &str, req: &Path) -> Result<PathBuf> {
let mut path = PathBuf::from(base);
for comp in req.components() {
match comp {
Component::Prefix(_) => bail!("Invalid component: windows path prefix"),
Component::RootDir => bail!("Invalid component: unix root directory"),
Component::CurDir => bail!("Invalid component: current dir"),
Component::ParentDir => bail!("Invalid component: parent dir"),
Component::Normal(comp) => {
path.push(comp);
}
}
}
Ok(path)
}
fn bad_request() -> HttpResponse {
HttpResponse::BadRequest()
.content_type("text/plain; charset=utf-8")
.body("400 - bad request\n")
}
fn forbidden() -> HttpResponse {
HttpResponse::Forbidden()
.content_type("text/plain; charset=utf-8")
.body("403 - forbidden\n")
}
fn not_found() -> HttpResponse {
HttpResponse::NotFound()
.content_type("text/plain; charset=utf-8")
.body("404 - not found\n")
}
fn internal_error() -> HttpResponse {
HttpResponse::InternalServerError()
.content_type("text/plain; charset=utf-8")
.body("500 - internal server error\n")
}
enum ResolvedPath<'a> {
File(Cow<'a, Path>),
ListDir(&'a Path),
Forbidden,
NotFound,
}
fn resolve_path_fs(path: &Path, list_directories: bool) -> ResolvedPath {
if path.exists() {
if path.is_dir() {
let index_path = path.join("index.html");
if index_path.exists() {
ResolvedPath::File(Cow::Owned(index_path))
} else if list_directories {
ResolvedPath::ListDir(path)
} else {
ResolvedPath::Forbidden
}
} else {
ResolvedPath::File(Cow::Borrowed(path))
}
} else {
ResolvedPath::NotFound
}
}
fn list_directory(full_path: &Path, req_path: &str) -> Result<String> {
let escaped_req_path = htmlescape::encode_minimal(req_path);
let mut buf = format!(
r#"<html>
<head><title>Index of /{}</title></head>
<body>
<h1>Index of /{}</h1><hr><pre>
"#,
escaped_req_path, escaped_req_path
);
if !req_path.is_empty() {
buf.push_str("<a href=\"../\">../</a>\n");
}
let iter = fs::read_dir(&full_path).context("Failed to list directory")?;
let mut listing = Vec::new();
for entry in iter {
let entry = entry.context("Failed to get directory entry")?;
let file_name = entry.file_name();
if let Ok(file_name) = file_name.into_string() {
let md = entry
.metadata()
.with_context(|| anyhow!("Failed to stat file: {:?}", entry.path()))?;
listing.push((file_name, md.len()));
}
}
listing.sort();
for (file_name, size) in listing {
let padding = DIR_LIST_PADDING.saturating_sub(file_name.len());
let escaped_name = htmlescape::encode_attribute(&file_name);
buf.push_str(&format!(
"<a href=\"{}\">{}</a>{} {}\n",
escaped_name,
escaped_name,
" ".repeat(padding),
size
));
}
buf.push_str("</pre><hr></body>\n</html>\n");
Ok(buf)
}
#[get("/{tail:.*}")]
async fn index(cfg: web::Data<Config>, req: HttpRequest) -> impl Responder {
let req_path: PathBuf = req.match_info().query("tail").parse().unwrap();
let path = match resolve_path_req(&cfg.web_root, &req_path) {
Ok(path) => path,
Err(err) => {
debug!("Invalid request path: {:?} ({:#})", req_path, err);
return bad_request();
}
};
match resolve_path_fs(&path, cfg.list_directories) {
ResolvedPath::File(path) => {
let file = match NamedFile::open(&path) {
Ok(file) => file,
Err(err) => {
warn!("Failed to open file({:?}): {:#}", path, err);
return forbidden();
}
};
let res = file
.prefer_utf8(true)
.disable_content_disposition()
.use_etag(false)
.use_last_modified(false)
.into_response(&req);
match res {
Ok(res) => res,
Err(err) => {
warn!("Failed to create http response for {:?}: {:#}", path, err);
internal_error()
}
}
}
ResolvedPath::ListDir(path) => {
let req_path = match utils::path_to_string(req_path) {
Ok(path) => path,
Err(_) => return bad_request(),
};
if !req_path.is_empty() && !req_path.ends_with('/') {
return HttpResponse::Found()
.header(header::LOCATION, format!("/{}/", req_path))
.finish();
}
let listing = match list_directory(path, &req_path) {
Ok(listing) => listing,
Err(err) => {
warn!("Failed to list directory({:?}): {:#}", path, err);
return forbidden();
}
};
HttpResponse::Ok()
.header(header::CONTENT_TYPE, "text/html; charset=utf-8")
.body(listing)
}
ResolvedPath::Forbidden => forbidden(),
ResolvedPath::NotFound => not_found(),
}
}
#[actix_web::main]
async fn runtime(args: Args) -> Result<()> {
let config = web::Data::new(Config {
web_root: args.web_root.clone(),
list_directories: args.list_directories,
});
let server = HttpServer::new(move || {
App::new()
.wrap(
middleware::DefaultHeaders::new()
.header(header::DATE, "Thu, 01 Jan 1970 00:00:00 GMT")
.header(header::X_CONTENT_TYPE_OPTIONS, "nosniff")
.header(header::REFERRER_POLICY, "no-referrer"),
)
.wrap(middleware::Compress::default())
.app_data(config.clone())
.service(index)
});
let server = match args.bind_addr()? {
TorAddress::Address(addr) => server.bind(addr),
TorAddress::Unix(path) => server.bind_uds(&path),
_ => unreachable!(),
};
server
.context("Failed to setup server")?
.run()
.await
.context("Failed to run http server")?;
Ok(())
}
pub fn run(args: Args) -> Result<()> {
if let Some(chroot) = &args.chroot {
security::chroot(chroot).with_context(|| anyhow!("Failed to chroot into: {:?}", chroot))?;
info!("Successfully chrooted into {:?}", chroot);
}
runtime(args)?;
warn!("httpd thread has terminated");
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use test_case::test_case;
#[test_case("", "/var/www/"; "root")]
#[test_case("index.html", "/var/www/index.html"; "index.html")]
#[test_case("a/b/c", "/var/www/a/b/c"; "a b c file")]
#[test_case("a/b/c/", "/var/www/a/b/c/"; "a b c dir")]
#[test_case("a//b//c", "/var/www/a/b/c"; "multiple slash")]
#[test_case("a/b/index.html", "/var/www/a/b/index.html"; "sub index.html")]
#[test_case("C:\\\\", "/var/www/C:\\\\"; "windows prefix")]
#[test_case("\\", "/var/www/\\"; "backslash")]
fn test_valid_resolve_path_req(x: &str, y: &str) {
let resolved = resolve_path_req("/var/www/", Path::new(x)).unwrap();
assert_eq!(resolved, Path::new(y));
}
#[test_case("./index.html"; "dot slash index.html")]
#[test_case("/"; "redundant slash")]
#[test_case("."; "current directory")]
#[test_case(".."; "parent")]
#[test_case("a/b/../c"; "a b parent c")]
fn test_invalid_resolve_path_req(x: &str) {
let result = resolve_path_req("/var/www/", Path::new(x));
assert!(result.is_err());
}
}