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use std::collections::HashMap;
use std::env;
use std::fs;
use std::io::prelude::*;
use std::net::TcpListener;
use std::path::Path;
mod file_parser;
mod http_parser;
pub mod request;
pub mod response;
mod threadpool;
use file_parser::FileParser;
use request::Request;
use response::Response;
use threadpool::ThreadPool;
pub struct Spot {
/// The amount of worker threads used to handle requests
amount_of_threads: usize,
// Contains all the routes for http resources on the server
routes: HashMap<String, fn(Request, Response) -> Response>,
// Contains all the middleware for the servers resources
middleware: Vec<(String, fn(Request, Response) -> (Request, Response, bool))>,
}
impl Spot {
/// Returns a Spot HTTP server instance with worker threads equal to the specified amount.
///
/// #Panics
///
/// panics if amount of threads is 0
pub fn new(amount_of_threads: usize) -> Spot {
return Spot {
amount_of_threads: amount_of_threads,
routes: HashMap::new(),
middleware: Vec::new(),
};
}
/// Add middleware for specified resources.
///
/// The middleware function takes inn a function that returns a modified response and request, aswell as a boolean is true if the request should be forwarded or false if you wish the server to write the current response.
pub fn middle(
&mut self,
path: &str,
function: fn(Request, Response) -> (Request, Response, bool),
) {
let mut path_string = String::from(path);
// Remove trailing / so that pathing is agnostic towards /example/ or /example
match path_string.pop() {
Some(last_char) => {
if last_char != '/' || path_string.len() == 0 {
path_string.push(last_char)
}
}
None => {
path_string.push('/');
}
};
self.middleware.push((path_string, function));
}
/// Add a http resource route which takes in the request and a premade respons, then returns a modifed response that is written to the client
pub fn route(&mut self, path: &str, function: fn(Request, Response) -> Response) {
let mut path_string = String::from(path);
// Remove trailing / so that pathing is agnostic towards /example/ or /example
match path_string.pop() {
Some(last_char) => {
if last_char != '/' || path_string.len() == 0 {
path_string.push(last_char)
}
}
None => {
path_string.push('/');
}
};
if self.routes.contains_key(&path_string) {
println!(
"Warning: Route defined twice ({}), using latest definition",
path
);
self.routes.remove(&path_string);
}
self.routes.insert(path_string, function);
}
/// Add a file to routes, it's route is equal to the path where the file lies
pub fn route_file(&mut self, path: &str) {
fn function(req: Request, mut res: Response) -> Response {
if req.method == "GET" {
let path = req.url;
let path_split = path.split('.');
let file_ending = match path_split.last() {
Some(file_ending) => file_ending,
None => "",
};
let file_type = FileParser::get_type(file_ending);
// remove first / from path and read metadata then file
match fs::metadata(&path[1..]) {
Ok(metadata) => {
let mut contents = vec![0; metadata.len() as usize];
match fs::File::open(&path[1..]) {
Ok(mut file) => {
let result = file.read(&mut contents);
match result {
Ok(_) => {
res.status(200);
res.body_bytes(contents);
res.header("content-type", file_type);
}
Err(error) => {
println!("{}", error);
res.status(500);
}
}
}
Err(error) => {
println!("{}", error);
res.status(500);
}
}
}
Err(error) => {
println!("{}", error);
res.status(500);
}
}
}
return res;
};
// Replace Windows specific backslashes in path with forward slashes
let result = path.replace("\\", "/");
let route_path = format!("/{}", result);
Spot::route(self, &route_path, function);
}
/// Recursive function that adds all the files in the public folder to the server routes
fn add_static_files(&mut self, directory: &Path, path: &str) {
let dir_iter = fs::read_dir(path).unwrap();
// Add all files to path hashmap, for each directory in the public folder we run this function recursivly
for item in dir_iter {
match item {
Ok(item_uw) => {
let item_path = item_uw.path().into_os_string().into_string().unwrap();
let item_metadata = item_uw.metadata().unwrap();
if item_metadata.is_dir() {
Spot::add_static_files(self, directory, &item_path);
} else {
Spot::route_file(self, &item_path);
}
}
Err(error) => {
println!("{}", error);
}
};
}
}
/// Make all the files in the specified directory publicly avalible
pub fn public(&mut self, dir_name: &str) {
let path = env::current_dir().unwrap();
let new_root_dir = path.join(dir_name);
// Set the specified directory as the root when reading files
assert!(env::set_current_dir(&new_root_dir).is_ok());
let dir = env::current_dir().unwrap();
self.add_static_files(dir.as_path(), "");
}
/// Bind the server to the specified IP address and listen for inncomming http requests
pub fn bind(&mut self, ip: &str) -> String {
let listener = match TcpListener::bind(ip) {
Ok(result) => result,
Err(error) => {
return String::from(format!("Failed to bind to ip: {}", error));
}
};
// Sort middleware by length
self.middleware.sort_by(|a, b| a.0.len().cmp(&b.0.len()));
// clone routes and middleware
let routes_clone = self.routes.clone();
let middleware_clone = self.middleware.clone();
// Create threadpool
let pool = ThreadPool::new(self.amount_of_threads, routes_clone, middleware_clone);
println!("Spot server listening on: http://{}", ip);
for stream in listener.incoming() {
match stream {
Ok(stream_uw) => {
pool.execute(stream_uw);
}
Err(error) => println!("{}", error),
}
}
return String::from("Shutting down.");
}
}