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use std::{cmp::min, collections::HashMap, io::Error, sync::Arc};
use chrono::Utc;
use tokio::{
io::{AsyncReadExt, AsyncWriteExt},
net::{
tcp::{OwnedReadHalf, OwnedWriteHalf},
TcpStream,
},
sync::Mutex,
};
use crate::TINY_KEY;
use super::{
action::{ActMap, Action, ActionData, Answer, WebFile},
cache::Cache,
file::TempFile,
html::Html,
lang::Lang,
log::Log,
mail::Mail,
pool::DBPool,
workers::{fastcgi, grpc, http, scgi, uwsgi, websocket},
};
/// Buffer for read data from TcpStream
pub const BUFFER_SIZE: usize = 8192;
// pub const BUFFER_SIZE: usize = 50;
/// One year in seconds
const ONE_YEAR: i64 = 31622400;
/// Connection processing workflow
pub struct Worker;
/// Worker type
///
/// # Values
///
/// * `FastCGI` - FastCGI protocol.
/// * `Uwsgi` - UWSGI protocol.
/// * `Grpc` - GRPC protocol.
/// * `Scgi` - SCGI protocol.
/// * `Http` - HTTP protocol.
/// * `WebSocket` - WebSocket protocol.
#[derive(Debug, Clone)]
pub enum WorkerType {
/// FastCGI protocol.
FastCGI,
/// UWSGI protocol.
Uwsgi,
/// GRPC protocol.
Grpc,
/// SCGI protocol.
Scgi,
/// HTTP or WebSocket protocol.
Http,
/// WebSocket
WebSocket,
/// Error
Error,
}
/// General data
///
/// # Values
///
/// * `engine: Arc<ActMap>` - Engine - binary tree of controller functions.
/// * `lang: Arc<Lang>` - I18n system.
/// * `html: Arc<Html>` - Template maker.
/// * `cache: Arc<Mutex<Cache>>` - Cache system.
/// * `db: Arc<DBPool>` - Database connections pool.
/// * `salt: Arc<String>` - Salt for a crypto functions.
#[derive(Debug)]
pub struct WorkerData {
/// Engine - binary tree of controller functions.
pub engine: Arc<ActMap>,
/// I18n system.
pub lang: Arc<Lang>,
/// Template maker.
pub html: Arc<Html>,
/// Cache system.
pub cache: Arc<Mutex<Cache>>,
/// Database connections pool.
pub db: Arc<DBPool>,
/// Salt for a crypto functions.
pub salt: Arc<String>,
/// Mail provider.
pub mail: Arc<Mutex<Mail>>,
}
/// Half of the network to read
pub struct StreamRead {
/// A Tokio network stream
tcp: OwnedReadHalf,
/// Reading buffer
buf: [u8; BUFFER_SIZE],
/// The number of bytes in the buffer
len: usize,
// Reading shift
shift: usize,
}
/// Half of the network to write
pub struct StreamWrite {
/// A Tokio network stream
tcp: OwnedWriteHalf,
}
/// A network stream errors
pub enum StreamError {
/// Stream are closed
Closed,
/// Error reading from stream
Error(Error),
/// Buffer is small
Buffer,
/// Read timeout
Timeout,
}
impl StreamRead {
/// Read from stream to buffer
///
/// # Params
///
/// * `timeout: u64` - How long to wait for a reading? (in milliseconds)
///
/// If timeout = 0, it will wait until data appears or an error occurs.
/// After `StreamError::Timeout`, saving data in the buffer and correct operation of the protocol are not guaranteed, so it is advisable to close the stream.
pub async fn read(&mut self, timeout: u64) -> Result<(), StreamError> {
if self.shift == 0 && self.len == BUFFER_SIZE {
return Err(StreamError::Buffer);
} else if self.shift > 0 && self.len <= BUFFER_SIZE {
self.buf.copy_within(self.shift.., 0);
self.len -= self.shift;
self.shift = 0;
}
if timeout > 0 {
match tokio::time::timeout(std::time::Duration::from_millis(timeout), async {
match self.tcp.read(unsafe { self.buf.get_unchecked_mut(self.len..) }).await {
Ok(len) => {
if len == 0 {
Err(StreamError::Closed)
} else {
Ok(len)
}
}
Err(e) => Err(StreamError::Error(e)),
}
})
.await
{
Ok(res) => match res {
Ok(len) => {
self.len += len;
Ok(())
}
Err(e) => Err(e),
},
Err(_) => Err(StreamError::Timeout),
}
} else {
match self.tcp.read(unsafe { self.buf.get_unchecked_mut(self.len..) }).await {
Ok(len) => {
if len == 0 {
Err(StreamError::Closed)
} else {
self.len += len;
Ok(())
}
}
Err(e) => Err(StreamError::Error(e)),
}
}
}
/// Gets bytes in the local buffer
pub fn get(&self, size: usize) -> &[u8] {
let size = min(self.shift + size, self.len);
unsafe { self.buf.get_unchecked(self.shift..size) }
}
/// Adds shift in the data
pub fn shift(&mut self, shift: usize) {
self.shift += shift;
if self.shift > self.len {
self.shift = self.len;
}
}
/// Gets length of available data
pub fn available(&self) -> usize {
self.len - self.shift
}
}
impl StreamWrite {
/// Write unswer to the stream
pub async fn write(&mut self, src: &[u8]) -> Result<usize, Error> {
self.tcp.write(src).await
}
}
impl Worker {
/// Run main worker
///
/// # Params
///
/// * `stream: TcpStream` - Tokio tcp stream.
/// * `data: WorkerData` - General data for the web engine.
/// * `protocol: Arc<WorkerType>` - Used protocol.
pub async fn run(stream: TcpStream, data: WorkerData, protocol: Arc<WorkerType>) {
let (read, write) = stream.into_split();
let mut stream_read = StreamRead {
tcp: read,
buf: [0; BUFFER_SIZE],
len: 0,
shift: 0,
};
let stream_write = StreamWrite { tcp: write };
if let Err(e) = stream_read.read(1000).await {
match e {
StreamError::Closed => {}
StreamError::Error(e) => {
Log::warning(2000, Some(e.to_string()));
}
StreamError::Buffer => {
Log::warning(2006, None);
}
StreamError::Timeout => {
Log::warning(2001, None);
}
}
return;
}
match protocol.as_ref() {
WorkerType::FastCGI => fastcgi::Net::run(stream_read, stream_write, data).await,
WorkerType::Uwsgi => uwsgi::Net::run(stream_read, stream_write, data).await,
WorkerType::Grpc => grpc::Net::run(stream_read, stream_write, data).await,
WorkerType::Scgi => scgi::Net::run(stream_read, stream_write, data).await,
WorkerType::Http => http::Net::run(stream_read, stream_write, data).await,
WorkerType::WebSocket => websocket::Net::run(stream_read, stream_write, data).await,
WorkerType::Error => {}
}
}
/// Return a text description of the return code
pub fn http_code_get(code: u16) -> &'static str {
match code {
100 => "Continue",
101 => "Switching Protocols",
102 => "Processing",
103 => "Early Hints",
200 => "OK",
201 => "Created",
202 => "Accepted",
203 => "Non-Authoritative Information",
204 => "No Content",
205 => "Reset Content",
206 => "Partial Content",
207 => "Multi-Status",
208 => "Already Reported",
226 => "IM Used",
300 => "Multiple Choices",
301 => "Moved Permanently",
302 => "Found",
303 => "See Other",
304 => "Not Modified",
305 => "Use Proxy",
306 => "(Unused)",
307 => "Temporary Redirect",
308 => "Permanent Redirect",
400 => "Bad Request",
401 => "Unauthorized",
402 => "Payment Required",
403 => "Forbidden",
404 => "Not Found",
405 => "Method Not Allowed",
406 => "Not Acceptable",
407 => "Proxy Authentication Required",
408 => "Request Timeout",
409 => "Conflict",
410 => "Gone",
411 => "Length Required",
412 => "Precondition Failed",
413 => "Content Too Large",
414 => "URI Too Long",
415 => "Unsupported Media Type",
416 => "Range Not Satisfiable",
417 => "Expectation Failed",
418 => "(Unused)",
421 => "Misdirected Request",
422 => "Unprocessable Content",
423 => "Locked",
424 => "Failed Dependency",
425 => "Too Early",
426 => "Upgrade Required",
428 => "Precondition Required",
429 => "Too Many Requests",
431 => "Request Header Fields Too Large",
451 => "Unavailable For Legal Reasons",
500 => "Internal Server Error",
501 => "Not Implemented",
502 => "Bad Gateway",
503 => "Service Unavailable",
504 => "Gateway Timeout",
505 => "HTTP Version Not Supported",
506 => "Variant Also Negotiates",
507 => "Insufficient Storage",
508 => "Loop Detected",
510 => "Not Extended (OBSOLETED)",
511 => "Network Authentication Required",
_ => "Unassigned",
}
}
/// Run web engine
///
/// # Return
///
/// Vector with a binary data
pub async fn call_action(data: ActionData) -> Vec<u8> {
let mut action = match Action::new(data).await {
Ok(action) => action,
Err((redirect, files)) => {
// Stopping a call in a parallel thread
tokio::spawn(async move {
let mut vec = Vec::with_capacity(32);
for files in files.into_values() {
for f in files {
vec.push(f.tmp)
}
}
Action::clean_file(vec).await;
});
// Write status
let mut answer: Vec<u8> = Vec::with_capacity(512);
if redirect.permanently {
answer.extend_from_slice(
format!("Status: 301 {}\r\nLocation: {}\r\n\r\n", Worker::http_code_get(301), redirect.url).as_bytes(),
);
} else {
answer.extend_from_slice(
format!("Status: 302 {}\r\nLocation: {}\r\n\r\n", Worker::http_code_get(302), redirect.url).as_bytes(),
);
}
return answer;
}
};
let result = match Action::run(&mut action).await {
Answer::Raw(answer) => answer,
Answer::String(answer) => answer.into_bytes(),
Answer::None => Vec::new(),
};
// + Status + Cookie + Keep-alive + Content-Type + Content-Length + headers
// max length
let capacity = result.len() + 4096;
// Write status
let mut answer: Vec<u8> = Vec::with_capacity(capacity);
if let Some(redirect) = action.response.redirect.as_ref() {
if redirect.permanently {
answer.extend_from_slice(
format!("Status: 301 {}\r\nLocation: {}\r\n", Worker::http_code_get(301), redirect.url).as_bytes(),
);
} else {
answer.extend_from_slice(
format!("Status: 302 {}\r\nLocation: {}\r\n", Worker::http_code_get(302), redirect.url).as_bytes(),
);
}
} else if let Some(code) = action.response.http_code {
answer.extend_from_slice(format!("Status: {} {}\r\n", code, Worker::http_code_get(code)).as_bytes());
} else {
answer.extend_from_slice(format!("Status: 200 {}\r\n", Worker::http_code_get(200)).as_bytes());
}
// Write Cookie
let time = Utc::now() + chrono::Duration::seconds(ONE_YEAR);
let date = time.format("%a, %d-%b-%Y %H:%M:%S GMT").to_string();
let secure = if action.request.scheme == "https" { "Secure; " } else { "" };
answer.extend_from_slice(
format!(
"Set-Cookie: {}={}; Expires={}; Max-Age={}; path=/; domain={}; {}SameSite=none\r\n",
TINY_KEY, &action.session.key, date, ONE_YEAR, action.request.host, secure
)
.as_bytes(),
);
// Write Content-Type
match &action.response.content_type {
Some(content_type) => answer.extend_from_slice(format!("Content-Type: {}\r\n", content_type).as_bytes()),
None => answer.extend_from_slice(b"Content-Type: text/html; charset=utf-8\r\n"),
}
answer.extend_from_slice(b"Connection: Keep-Alive\r\n");
// Write headers
for (name, val) in &action.response.headers {
answer.extend_from_slice(format!("{}: {}\r\n", name, val).as_bytes());
}
// Write Content-Length
answer.extend_from_slice(format!("Content-Length: {}\r\n\r\n", result.len()).as_bytes());
answer.extend_from_slice(&result);
// Stopping a call in a parallel thread
tokio::spawn(async move {
Action::stop(action).await;
});
answer
}
/// Read post and file datas.
///
/// # Params
///
/// * `data: Vec<u8>` - Data.
/// * `content_type: Option<String>` - CONTENT_TYPE parameter
///
/// # Return
///
/// * `HashMap<String, String>` - Post data.
/// * `HashMap<String, Vec<WebFile>>` - File data.
pub async fn read_input(
data: Vec<u8>,
content_type: Option<String>,
) -> (HashMap<String, String>, HashMap<String, Vec<WebFile>>) {
let mut post = HashMap::new();
let mut file = HashMap::new();
// Different types of CONTENT_TYPE need to be processed differently
if let Some(c) = content_type {
// Simple post
if c == "application/x-www-form-urlencoded" {
if !data.is_empty() {
if let Ok(s) = std::str::from_utf8(&data) {
let val: Vec<&str> = s.split('&').collect();
post.reserve(val.len());
for v in val {
let val: Vec<&str> = v.splitn(2, '=').collect();
match val.len() {
1 => post.insert(v.to_owned(), String::new()),
_ => post.insert(val[0].to_owned(), val[1].to_owned()),
};
}
}
}
} else if c.len() > 30 {
// Multi post with files
if let "multipart/form-data; boundary=" = &c[..30] {
let boundary = format!("--{}", &c[30..]);
let stop: [u8; 4] = [13, 10, 13, 10];
if !data.is_empty() {
let mut seek: usize = 0;
let mut start: usize;
let b_len = boundary.len();
let len = data.len() - 4;
let mut found: Option<(usize, &str)> = None;
while seek < len {
// Find a boundary
if boundary.as_bytes() == &data[seek..seek + b_len] {
if seek + b_len == len {
if let Some((l, h)) = found {
let d = &data[l..seek - 2];
Worker::get_post_file(h, d, &mut post, &mut file).await;
};
break;
}
seek += b_len + 2;
start = seek;
while seek < len {
if stop == data[seek..seek + 4] {
if let Ok(s) = std::str::from_utf8(&data[start..seek]) {
if let Some((l, h)) = found {
let d = &data[l..start - b_len - 4];
Worker::get_post_file(h, d, &mut post, &mut file).await;
};
found = Some((seek + 4, s));
}
seek += 4;
break;
} else {
seek += 1;
}
}
} else {
seek += 1;
}
}
}
}
}
}
(post, file)
}
/// Gets post and file records from multipart/form-data
pub async fn get_post_file(
header: &str,
data: &[u8],
post: &mut HashMap<String, String>,
file: &mut HashMap<String, Vec<WebFile>>,
) {
let h: Vec<&str> = header.splitn(3, "; ").collect();
let len = h.len();
// Post data found
if len == 2 {
if let Ok(v) = std::str::from_utf8(data) {
let k = &h[1][6..h[1].len() - 1];
post.insert(k.to_owned(), v.to_owned());
}
} else if len == 3 {
// File data found
let k = h[1][6..h[1].len() - 1].to_owned();
let n: Vec<&str> = h[2].splitn(2, "\r\n").collect();
let n = &n[0][10..n[0].len() - 1];
let path = TempFile::new_name();
if TempFile::write(&path, data).await.is_ok() {
if file.get(&k).is_none() {
file.insert(k.to_owned(), Vec::with_capacity(16));
} else if let Some(d) = file.get_mut(&k) {
d.push(WebFile {
size: data.len(),
name: n.to_owned(),
tmp: path,
})
};
}
}
}
}