/
main.rs
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/
main.rs
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extern crate actix;
extern crate actix_web;
extern crate simplelog;
extern crate base64;
#[macro_use] extern crate clap;
use actix_web::http::header;
use actix_web::{server, App, fs, middleware, HttpRequest, HttpResponse, HttpMessage, Result};
use actix_web::middleware::{Middleware, Response};
use simplelog::{TermLogger, LevelFilter, Config};
use std::path::PathBuf;
use std::net::{IpAddr, Ipv4Addr};
enum BasicAuthError {
Base64DecodeError,
InvalidUsernameFormat,
}
#[derive(Clone, Debug)]
struct BasicAuthParams {
username: String,
password: String,
}
#[derive(Clone, Debug)]
pub struct MiniserveConfig {
verbose: bool,
path: std::path::PathBuf,
port: u16,
interface: IpAddr,
auth: Option<BasicAuthParams>,
}
/// Decode a HTTP basic auth string into a tuple of username and password.
fn parse_basic_auth(authorization_header: &header::HeaderValue) -> Result<BasicAuthParams, BasicAuthError> {
let basic_removed = authorization_header.to_str().unwrap().replace("Basic ", "");
let decoded = base64::decode(&basic_removed).map_err(|_| BasicAuthError::Base64DecodeError)?;
let decoded_str = String::from_utf8_lossy(&decoded);
let strings: Vec<&str> = decoded_str.splitn(2, ':').collect();
if strings.len() != 2 {
return Err(BasicAuthError::InvalidUsernameFormat);
}
Ok(BasicAuthParams { username: strings[0].to_owned(), password: strings[1].to_owned() })
}
fn is_valid_path(path: String) -> Result<(), String> {
let path_to_check = PathBuf::from(path);
if path_to_check.is_file() || path_to_check.is_dir() {
return Ok(());
}
Err(String::from("Path either doesn't exist or is not a regular file or a directory"))
}
fn is_valid_port(port: String) -> Result<(), String> {
port.parse::<u16>().and(Ok(())).or_else(|e| Err(e.to_string()))
}
fn is_valid_interface(interface: String) -> Result<(), String> {
interface.parse::<IpAddr>().and(Ok(())).or_else(|e| Err(e.to_string()))
}
fn is_valid_auth(auth: String) -> Result<(), String> {
auth.find(':').ok_or("Correct format is username:password".to_owned()).map(|_| ())
}
pub fn parse_args() -> MiniserveConfig {
use clap::{App, Arg};
let matches = App::new(crate_name!())
.version(crate_version!())
.author(crate_authors!())
.about(crate_description!())
.arg(
Arg::with_name("verbose")
.short("v")
.long("verbose")
.help("Be verbose"),
)
.arg(
Arg::with_name("PATH")
.required(true)
.validator(is_valid_path)
.help("Which path to serve"),
)
.arg(
Arg::with_name("port")
.short("p")
.long("port")
.help("Port to use")
.validator(is_valid_port)
.required(false)
.default_value("8080")
.takes_value(true),
)
.arg(
Arg::with_name("interface")
.short("i")
.long("if")
.help("Interface to listen on")
.validator(is_valid_interface)
.required(false)
.default_value("0.0.0.0")
.takes_value(true),
)
.arg(
Arg::with_name("auth")
.short("a")
.long("auth")
.validator(is_valid_auth)
.help("Set authentication (username:password)")
.takes_value(true),
)
.get_matches();
let verbose = matches.is_present("verbose");
let path = matches.value_of("PATH").unwrap();
let port = matches.value_of("port").unwrap().parse().unwrap();
let interface = matches.value_of("interface").unwrap().parse().unwrap();
let auth = if let Some(auth_split) = matches.value_of("auth").map(|x| x.splitn(2, ':')) {
let auth_vec = auth_split.collect::<Vec<&str>>();
if auth_vec.len() == 2 {
Some(BasicAuthParams { username: auth_vec[0].to_owned(), password: auth_vec[1].to_owned() })
} else {
None
}
} else {
None
};
MiniserveConfig {
verbose,
path: PathBuf::from(path),
port,
interface,
auth,
}
}
fn file_handler(req: HttpRequest<MiniserveConfig>) -> Result<fs::NamedFile> {
let path = &req.state().path;
Ok(fs::NamedFile::open(path)?)
}
fn configure_app(app: App<MiniserveConfig>) -> App<MiniserveConfig> {
let s = {
let path = &app.state().path;
if path.is_file() {
None
} else {
Some(fs::StaticFiles::new(path).show_files_listing())
}
};
if let Some(s) = s {
app.handler("/", s)
} else {
app.resource("/", |r| r.f(file_handler))
}
}
struct Auth;
impl Middleware<MiniserveConfig> for Auth {
fn response(&self, req: &mut HttpRequest<MiniserveConfig>, resp: HttpResponse) -> Result<Response> {
if let &Some(ref required_auth) = &req.state().auth {
if let Some(auth_headers) = req.headers().get(header::AUTHORIZATION) {
let auth_req = match parse_basic_auth(auth_headers) {
Ok(auth_req) => auth_req,
Err(BasicAuthError::Base64DecodeError) =>
return Ok(Response::Done(HttpResponse::BadRequest()
.body(format!("Error decoding basic auth base64: '{}'",
auth_headers.to_str().unwrap())))),
Err(BasicAuthError::InvalidUsernameFormat) =>
return Ok(Response::Done(HttpResponse::BadRequest()
.body("Invalid basic auth format"))),
};
if auth_req.username != required_auth.username
|| auth_req.password != required_auth.password {
let new_resp = HttpResponse::Forbidden()
.finish();
return Ok(Response::Done(new_resp));
}
} else {
let new_resp = HttpResponse::Unauthorized()
.header(header::WWW_AUTHENTICATE,
header::HeaderValue::from_static("Basic realm=\"miniserve\""))
.finish();
return Ok(Response::Done(new_resp));
}
}
Ok(Response::Done(resp))
}
}
fn main() {
let miniserve_config = parse_args();
if miniserve_config.verbose {
let _ = TermLogger::init(LevelFilter::Info, Config::default());
}
let sys = actix::System::new("miniserve");
let inside_config = miniserve_config.clone();
server::new(
move || App::with_state(inside_config.clone())
.middleware(Auth)
.middleware(middleware::Logger::default())
.configure(configure_app))
.bind(format!("{}:{}", &miniserve_config.interface, miniserve_config.port)).expect("Couldn't bind server")
.shutdown_timeout(0)
.start();
// If the interface is 0.0.0.0, we'll change it to localhost so that clicking the link will
// also work on Windows. Why can't Windows interpret 0.0.0.0?
let interface = if miniserve_config.interface == IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)) {
String::from("localhost")
} else {
format!("{}", miniserve_config.interface)
};
let canon_path = miniserve_config.path.canonicalize().unwrap();
println!("miniserve is serving your files at http://{interface}:{port}", interface=interface, port=miniserve_config.port);
println!("Currently serving path {path}", path=canon_path.to_string_lossy());
println!("Quit by pressing CTRL-C");
let _ = sys.run();
}