fbb4d5392a
Refine code to support rust edition 2018, no functional changes. Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
836 lines
33 KiB
Rust
836 lines
33 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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extern crate epoll;
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use std::collections::HashMap;
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use std::io::{Read, Write};
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use std::os::unix::io::AsRawFd;
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use std::os::unix::io::RawFd;
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use std::os::unix::net::{UnixListener, UnixStream};
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use std::path::Path;
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use crate::common::ConnectionError;
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use crate::common::{Body, Version};
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use crate::connection::HttpConnection;
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use crate::request::Request;
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use crate::response::{Response, StatusCode};
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pub use crate::common::ServerError;
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static SERVER_FULL_ERROR_MESSAGE: &[u8] = b"HTTP/1.1 503\r\n\
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Server: Firecracker API\r\n\
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Connection: close\r\n\
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Content-Length: 40\r\n\r\n{ \"error\": \"Too many open connections\" }";
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const MAX_CONNECTIONS: usize = 10;
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type Result<T> = std::result::Result<T, ServerError>;
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/// Wrapper over `Request` which adds an identification token.
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pub struct ServerRequest {
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/// Inner request.
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pub request: Request,
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/// Identification token.
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id: u64,
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}
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impl ServerRequest {
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/// Creates a new `ServerRequest` object from an existing `Request`,
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/// adding an identification token.
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pub fn new(request: Request, id: u64) -> Self {
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ServerRequest { request, id }
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}
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/// Returns a reference to the inner request.
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pub fn inner(&self) -> &Request {
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&self.request
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}
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/// Calls the function provided on the inner request to obtain the response.
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/// The response is then wrapped in a `ServerResponse`.
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///
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/// Returns a `ServerResponse` ready for yielding to the server
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pub fn process<F>(&self, callable: F) -> ServerResponse
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where
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F: Fn(&Request) -> Response,
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{
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let http_response = callable(self.inner());
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ServerResponse::new(http_response, self.id)
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}
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}
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/// Wrapper over `Response` which adds an identification token.
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pub struct ServerResponse {
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/// Inner response.
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response: Response,
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/// Identification token.
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id: u64,
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}
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impl ServerResponse {
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fn new(response: Response, id: u64) -> ServerResponse {
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ServerResponse { response, id }
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}
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}
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/// Describes the state of the connection as far as data exchange
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/// on the stream is concerned.
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#[derive(PartialOrd, PartialEq)]
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enum ClientConnectionState {
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AwaitingIncoming,
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AwaitingOutgoing,
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Closed,
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}
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/// Wrapper over `HttpConnection` which keeps track of yielded
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/// requests and absorbed responses.
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struct ClientConnection<T> {
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/// The `HttpConnection` object which handles data exchange.
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connection: HttpConnection<T>,
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/// The state of the connection in the `epoll` structure.
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state: ClientConnectionState,
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/// Represents the difference between yielded requests and
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/// absorbed responses.
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/// This has to be `0` if we want to drop the connection.
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in_flight_response_count: u32,
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}
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impl<T: Read + Write> ClientConnection<T> {
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fn new(connection: HttpConnection<T>) -> Self {
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ClientConnection {
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connection,
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state: ClientConnectionState::AwaitingIncoming,
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in_flight_response_count: 0,
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}
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}
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fn read(&mut self) -> Result<Vec<Request>> {
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// Data came into the connection.
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let mut parsed_requests = vec![];
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match self.connection.try_read() {
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Err(ConnectionError::ConnectionClosed) => {
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// Connection timeout.
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self.state = ClientConnectionState::Closed;
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// We don't want to propagate this to the server and we will
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// return no requests and wait for the connection to become
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// safe to drop.
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return Ok(vec![]);
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}
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Err(ConnectionError::StreamError(inner)) => {
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// Reading from the connection failed.
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// We should try to write an error message regardless.
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let mut internal_error_response =
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Response::new(Version::Http11, StatusCode::InternalServerError);
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internal_error_response.set_body(Body::new(inner.to_string()));
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self.connection.enqueue_response(internal_error_response);
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}
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Err(ConnectionError::ParseError(inner)) => {
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// An error occurred while parsing the read bytes.
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// Check if there are any valid parsed requests in the queue.
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while let Some(_discarded_request) = self.connection.pop_parsed_request() {}
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// Send an error response for the request that gave us the error.
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let mut error_response = Response::new(Version::Http11, StatusCode::BadRequest);
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error_response.set_body(Body::new(
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format!(
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"{{ \"error\": \"{}\nAll previous unanswered requests will be dropped.\" }}",
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inner.to_string()
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)
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.to_string(),
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));
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self.connection.enqueue_response(error_response);
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}
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Err(ConnectionError::InvalidWrite) => {
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// This is unreachable because `HttpConnection::try_read()` cannot return this error variant.
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unreachable!();
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}
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Ok(()) => {
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while let Some(request) = self.connection.pop_parsed_request() {
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// Add all valid requests to `parsed_requests`.
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parsed_requests.push(request);
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}
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}
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}
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self.in_flight_response_count += parsed_requests.len() as u32;
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// If the state of the connection has changed, we need to update
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// the event set in the `epoll` structure.
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if self.connection.pending_write() {
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self.state = ClientConnectionState::AwaitingOutgoing;
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}
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Ok(parsed_requests)
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}
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fn write(&mut self) -> Result<()> {
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// The stream is available for writing.
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match self.connection.try_write() {
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Err(ConnectionError::ConnectionClosed) | Err(ConnectionError::StreamError(_)) => {
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// Writing to the stream failed so it will be removed.
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self.state = ClientConnectionState::Closed;
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}
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Err(ConnectionError::InvalidWrite) => {
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// A `try_write` call was performed on a connection that has nothing
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// to write.
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return Err(ServerError::ConnectionError(ConnectionError::InvalidWrite));
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}
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_ => {
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// Check if we still have bytes to write for this connection.
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if !self.connection.pending_write() {
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self.state = ClientConnectionState::AwaitingIncoming;
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}
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}
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}
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Ok(())
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}
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fn enqueue_response(&mut self, response: Response) {
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if self.state != ClientConnectionState::Closed {
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self.connection.enqueue_response(response);
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}
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self.in_flight_response_count -= 1;
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}
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// Returns `true` if the connection is closed and safe to drop.
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fn is_done(&self) -> bool {
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self.state == ClientConnectionState::Closed
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&& !self.connection.pending_write()
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&& self.in_flight_response_count == 0
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}
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}
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/// HTTP Server implementation using Unix Domain Sockets and `EPOLL` to
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/// handle multiple connections on the same thread.
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///
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/// The function that does the data exchange is `handle_notifications`.
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/// It can be called in a loop, which will render the thread that the
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/// server runs on incapable of performing other operations, or it can
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/// be used in another `EPOLL` structure, as it provides its `epoll_fd`,
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/// the file descriptor of the epoll structure used within the server,
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/// and it can be added to another one using the `EPOLLIN` flag. Whenever
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/// there is a notification on that fd, `handle_notifications` should be
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/// called once.
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///
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/// # Example
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///
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/// ## Starting and running the server
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///
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/// ```
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/// use micro_http::{HttpServer, Response, StatusCode};
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///
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/// let path_to_socket = "/tmp/example.sock";
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/// std::fs::remove_file(path_to_socket).unwrap_or_default();
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///
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/// // Start the server.
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/// let mut server = HttpServer::new(path_to_socket).unwrap();
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/// server.start_server().unwrap();
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///
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/// // Connect a client to the server so it doesn't block in our example.
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/// let mut socket = std::os::unix::net::UnixStream::connect(path_to_socket).unwrap();
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///
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/// // Server loop processing requests.
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/// loop {
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/// for request in server.requests().unwrap() {
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/// let response = request.process(|request| {
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/// // Your code here.
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/// Response::new(request.http_version(), StatusCode::NoContent)
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/// });
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/// server.respond(response);
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/// }
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/// // Break this example loop.
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/// break;
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/// }
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/// ```
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pub struct HttpServer {
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/// Socket on which we listen for new connections.
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socket: UnixListener,
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/// File descriptor of the server's epoll structure.
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epoll_fd: RawFd,
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/// Holds the token-connection pairs of the server.
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/// Each connection has an associated identification token, which is
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/// the file descriptor of the underlying stream.
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/// We use the file descriptor of the stream as the key for mapping
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/// connections because the 1-to-1 relation is guaranteed by the OS.
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connections: HashMap<RawFd, ClientConnection<UnixStream>>,
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}
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impl HttpServer {
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/// Constructor for `HttpServer`.
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///
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/// Returns the newly formed `HttpServer`.
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///
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/// # Errors
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/// Returns an `IOError` when binding or `epoll::create` fails.
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pub fn new<P: AsRef<Path>>(path_to_socket: P) -> Result<Self> {
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let socket = UnixListener::bind(path_to_socket).map_err(ServerError::IOError)?;
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let epoll_fd = epoll::create(true).map_err(ServerError::IOError)?;
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Ok(HttpServer {
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socket,
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epoll_fd,
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connections: HashMap::new(),
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})
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}
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/// Starts the HTTP Server.
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pub fn start_server(&mut self) -> Result<()> {
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// Add the socket on which we listen for new connections to the
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// `epoll` structure.
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Self::epoll_add(self.epoll_fd, self.socket.as_raw_fd())
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}
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/// This function is responsible for the data exchange with the clients and should
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/// be called when we are either notified through `epoll` that we need to exchange
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/// data with at least a client or when we don't need to perform any other operations
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/// on this thread and we can afford to call it in a loop.
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///
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/// Note that this function will block the current thread if there are no notifications
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/// to be handled by the server.
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///
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/// Returns a collection of complete and valid requests to be processed by the user
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/// of the server. Once processed, responses should be sent using `enqueue_responses()`.
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///
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/// # Errors
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/// `IOError` is returned when `read`, `write` or `epoll::ctl` operations fail.
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/// `ServerFull` is returned when a client is trying to connect to the server, but
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/// full capacity has already been reached.
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/// `InvalidWrite` is returned when the server attempted to perform a write operation
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/// on a connection on which it is not possible.
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pub fn requests(&mut self) -> Result<Vec<ServerRequest>> {
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let mut parsed_requests: Vec<ServerRequest> = vec![];
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let mut events = vec![epoll::Event::new(epoll::Events::empty(), 0); MAX_CONNECTIONS];
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// This is a wrapper over the syscall `epoll_wait` and it will block the
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// current thread until at least one event is received.
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// The received notifications will then populate the `events` array with
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// `event_count` elements, where 1 <= event_count <= MAX_CONNECTIONS.
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let event_count =
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epoll::wait(self.epoll_fd, -1, &mut events[..]).map_err(ServerError::IOError)?;
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// We use `take()` on the iterator over `events` as, even though only
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// `events_count` events have been inserted into `events`, the size of
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// the array is still `MAX_CONNECTIONS`, so we discard empty elements
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// at the end of the array.
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for e in events.iter().take(event_count) {
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// Check the file descriptor which produced the notification `e`.
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// It could be that we have a new connection, or one of our open
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// connections is ready to exchange data with a client.
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if e.data as RawFd == self.socket.as_raw_fd() {
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// We have received a notification on the listener socket, which
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// means we have a new connection to accept.
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match self.handle_new_connection() {
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// If the server is full, we send a message to the client
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// notifying them that we will close the connection, then
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// we discard it.
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Err(ServerError::ServerFull) => {
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self.socket
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.accept()
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.map_err(ServerError::IOError)
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.and_then(move |(mut stream, _)| {
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stream
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.write(SERVER_FULL_ERROR_MESSAGE)
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.map_err(ServerError::IOError)
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})?;
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}
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// An internal error will compromise any in-flight requests.
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Err(error) => return Err(error),
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Ok(()) => {}
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};
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} else {
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// We have a notification on one of our open connections.
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let fd = e.data as RawFd;
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let client_connection = self.connections.get_mut(&fd).unwrap();
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if e.events & epoll::Events::EPOLLIN.bits() != 0 {
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// We have bytes to read from this connection.
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// If our `read` yields `Request` objects, we wrap them with an ID before
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// handing them to the user.
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parsed_requests.append(
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&mut client_connection
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.read()?
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.into_iter()
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.map(|request| ServerRequest::new(request, fd as u64))
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.collect(),
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);
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// If the connection was incoming before we read and we now have to write
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// either an error message or an `expect` response, we change its `epoll`
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// event set to notify us when the stream is ready for writing.
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if client_connection.state == ClientConnectionState::AwaitingOutgoing {
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Self::epoll_mod(self.epoll_fd, fd, epoll::Events::EPOLLOUT)?;
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}
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} else if e.events & epoll::Events::EPOLLOUT.bits() != 0 {
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// We have bytes to write on this connection.
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client_connection.write()?;
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// If the connection was outgoing before we tried to write the responses
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// and we don't have any more responses to write, we change the `epoll`
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// event set to notify us when we have bytes to read from the stream.
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if client_connection.state == ClientConnectionState::AwaitingIncoming {
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Self::epoll_mod(self.epoll_fd, fd, epoll::Events::EPOLLIN)?;
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}
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}
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}
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}
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// Remove dead connections.
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self.connections
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.retain(|_, client_connection| !client_connection.is_done());
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Ok(parsed_requests)
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}
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/// The file descriptor of the `epoll` structure can enable the server to become
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/// a non-blocking structure in an application.
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///
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/// Returns the file descriptor of the server's internal `epoll` structure.
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///
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/// # Example
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///
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/// ## Non-blocking server
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/// ```
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/// extern crate epoll;
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///
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/// use micro_http::{HttpServer, Response, StatusCode};
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///
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/// // Create our epoll manager.
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/// let epoll_fd = epoll::create(true).unwrap();
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///
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/// let path_to_socket = "/tmp/epoll_example.sock";
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/// std::fs::remove_file(path_to_socket).unwrap_or_default();
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///
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/// // Start the server.
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/// let mut server = HttpServer::new(path_to_socket).unwrap();
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/// server.start_server().unwrap();
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///
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/// // Add our server to the `epoll` manager.
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/// epoll::ctl(
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/// epoll_fd,
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/// epoll::ControlOptions::EPOLL_CTL_ADD,
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/// server.epoll_fd(),
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/// epoll::Event::new(epoll::Events::EPOLLIN, 1234u64),
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/// )
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/// .unwrap();
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///
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/// // Connect a client to the server so it doesn't block in our example.
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/// let mut socket = std::os::unix::net::UnixStream::connect(path_to_socket).unwrap();
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///
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/// // Control loop of the application.
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/// let mut events = Vec::with_capacity(10);
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/// loop {
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/// let num_ev = epoll::wait(epoll_fd, -1, events.as_mut_slice());
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/// for event in events {
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/// match event.data {
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/// // The server notification.
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/// 1234 => {
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/// let request = server.requests();
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/// // Process...
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/// }
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/// // Other `epoll` notifications.
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/// _ => {
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/// // Do other computation.
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/// }
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/// }
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/// }
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/// // Break this example loop.
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/// break;
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/// }
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/// ```
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pub fn epoll_fd(&self) -> RawFd {
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self.epoll_fd
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}
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/// Enqueues the provided responses in the outgoing connection.
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///
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/// # Errors
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/// `IOError` is returned when an `epoll::ctl` operation fails.
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pub fn enqueue_responses(&mut self, responses: Vec<ServerResponse>) -> Result<()> {
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for response in responses {
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self.respond(response)?;
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}
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Ok(())
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}
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/// Adds the provided response to the outgoing buffer in the corresponding connection.
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///
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/// # Errors
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/// `IOError` is returned when an `epoll::ctl` operation fails.
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pub fn respond(&mut self, response: ServerResponse) -> Result<()> {
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if let Some(client_connection) = self.connections.get_mut(&(response.id as i32)) {
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// If the connection was incoming before we enqueue the response, we change its
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// `epoll` event set to notify us when the stream is ready for writing.
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if let ClientConnectionState::AwaitingIncoming = client_connection.state {
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client_connection.state = ClientConnectionState::AwaitingOutgoing;
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Self::epoll_mod(self.epoll_fd, response.id as RawFd, epoll::Events::EPOLLOUT)?;
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}
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client_connection.enqueue_response(response.response);
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}
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Ok(())
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}
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/// Accepts a new incoming connection and adds it to the `epoll` notification structure.
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///
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/// # Errors
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/// `IOError` is returned when an `epoll::ctl` operation fails.
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fn handle_new_connection(&mut self) -> Result<()> {
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if self.connections.len() == MAX_CONNECTIONS {
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// If we want a replacement policy for connections
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// this is where we will have it.
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return Err(ServerError::ServerFull);
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}
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self.socket
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.accept()
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.map_err(ServerError::IOError)
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.and_then(|(stream, _)| {
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// `HttpConnection` is supposed to work with non-blocking streams.
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stream
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.set_nonblocking(true)
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.map(|_| stream)
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.map_err(ServerError::IOError)
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})
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.and_then(|stream| {
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// Add the stream to the `epoll` structure and listen for bytes to be read.
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Self::epoll_add(self.epoll_fd, stream.as_raw_fd())?;
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// Then add it to our open connections.
|
|
self.connections.insert(
|
|
stream.as_raw_fd(),
|
|
ClientConnection::new(HttpConnection::new(stream)),
|
|
);
|
|
Ok(())
|
|
})
|
|
}
|
|
|
|
/// Changes the event type for a connection to either listen for incoming bytes
|
|
/// or for when the stream is ready for writing.
|
|
fn epoll_mod(epoll_fd: RawFd, stream_fd: RawFd, evset: epoll::Events) -> Result<()> {
|
|
let event = epoll::Event::new(evset, stream_fd as u64);
|
|
epoll::ctl(
|
|
epoll_fd,
|
|
epoll::ControlOptions::EPOLL_CTL_MOD,
|
|
stream_fd,
|
|
event,
|
|
)
|
|
.map_err(ServerError::IOError)
|
|
}
|
|
|
|
/// Adds a stream to the `epoll` notification structure with the `EPOLLIN` event set.
|
|
fn epoll_add(epoll_fd: RawFd, stream_fd: RawFd) -> Result<()> {
|
|
epoll::ctl(
|
|
epoll_fd,
|
|
epoll::ControlOptions::EPOLL_CTL_ADD,
|
|
stream_fd,
|
|
epoll::Event::new(epoll::Events::EPOLLIN, stream_fd as u64),
|
|
)
|
|
.map_err(ServerError::IOError)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use std::fs;
|
|
use std::io::{Read, Write};
|
|
use std::os::unix::net::UnixStream;
|
|
|
|
use crate::common::Body;
|
|
|
|
#[test]
|
|
fn test_wait_one_connection() {
|
|
let path_to_socket = "/tmp/test_socket_http_server1.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
// Test one incoming connection.
|
|
let mut socket = UnixStream::connect(path_to_socket).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
socket
|
|
.write_all(
|
|
b"PATCH /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 13\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever body",
|
|
)
|
|
.unwrap();
|
|
|
|
let mut req_vec = server.requests().unwrap();
|
|
let server_request = req_vec.remove(0);
|
|
|
|
server
|
|
.respond(server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
}))
|
|
.unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(socket.read(&mut buf[..]).unwrap() > 0);
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_wait_concurrent_connections() {
|
|
let path_to_socket = "/tmp/test_socket_http_server2.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
// Test two concurrent connections.
|
|
let mut first_socket = UnixStream::connect(path_to_socket).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
first_socket
|
|
.write_all(
|
|
b"PATCH /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 13\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever body",
|
|
)
|
|
.unwrap();
|
|
let mut second_socket = UnixStream::connect(path_to_socket).unwrap();
|
|
|
|
let mut req_vec = server.requests().unwrap();
|
|
let server_request = req_vec.remove(0);
|
|
|
|
server
|
|
.respond(server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
}))
|
|
.unwrap();
|
|
second_socket
|
|
.write_all(
|
|
b"GET /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 20\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever second body",
|
|
)
|
|
.unwrap();
|
|
|
|
let mut req_vec = server.requests().unwrap();
|
|
let second_server_request = req_vec.remove(0);
|
|
|
|
assert_eq!(
|
|
second_server_request.request,
|
|
Request::try_from(
|
|
b"GET /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 20\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever second body"
|
|
)
|
|
.unwrap()
|
|
);
|
|
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(first_socket.read(&mut buf[..]).unwrap() > 0);
|
|
first_socket.shutdown(std::net::Shutdown::Both).unwrap();
|
|
|
|
server
|
|
.respond(second_server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response second body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
}))
|
|
.unwrap();
|
|
|
|
assert!(server.requests().unwrap().is_empty());
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(second_socket.read(&mut buf[..]).unwrap() > 0);
|
|
second_socket.shutdown(std::net::Shutdown::Both).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_wait_expect_connection() {
|
|
let path_to_socket = "/tmp/test_socket_http_server3.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
// Test one incoming connection with `Expect: 100-continue`.
|
|
let mut socket = UnixStream::connect(path_to_socket).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
socket
|
|
.write_all(
|
|
b"PATCH /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 13\r\n\
|
|
Expect: 100-continue\r\n\r\n",
|
|
)
|
|
.unwrap();
|
|
// `wait` on server to receive what the client set on the socket.
|
|
// This will set the stream direction to `Outgoing`, as we need to send a `100 CONTINUE` response.
|
|
let req_vec = server.requests().unwrap();
|
|
assert!(req_vec.is_empty());
|
|
// Another `wait`, this time to send the response.
|
|
// Will be called because of an `EPOLLOUT` notification.
|
|
let req_vec = server.requests().unwrap();
|
|
assert!(req_vec.is_empty());
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(socket.read(&mut buf[..]).unwrap() > 0);
|
|
|
|
socket.write_all(b"whatever body").unwrap();
|
|
let mut req_vec = server.requests().unwrap();
|
|
let server_request = req_vec.remove(0);
|
|
|
|
server
|
|
.respond(server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
}))
|
|
.unwrap();
|
|
|
|
let req_vec = server.requests().unwrap();
|
|
assert!(req_vec.is_empty());
|
|
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(socket.read(&mut buf[..]).unwrap() > 0);
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_wait_many_connections() {
|
|
let path_to_socket = "/tmp/test_socket_http_server4.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
let mut sockets: Vec<UnixStream> = Vec::with_capacity(11);
|
|
for _ in 0..MAX_CONNECTIONS {
|
|
sockets.push(UnixStream::connect(path_to_socket).unwrap());
|
|
assert!(server.requests().unwrap().is_empty());
|
|
}
|
|
|
|
sockets.push(UnixStream::connect(path_to_socket).unwrap());
|
|
assert!(server.requests().unwrap().is_empty());
|
|
let mut buf: [u8; 120] = [0; 120];
|
|
sockets[MAX_CONNECTIONS].read_exact(&mut buf).unwrap();
|
|
assert_eq!(&buf[..], SERVER_FULL_ERROR_MESSAGE);
|
|
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_wait_parse_error() {
|
|
let path_to_socket = "/tmp/test_socket_http_server5.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
// Test one incoming connection.
|
|
let mut socket = UnixStream::connect(path_to_socket).unwrap();
|
|
socket.set_nonblocking(true).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
socket
|
|
.write_all(
|
|
b"PATCH /machine-config HTTP/1.1\r\n\
|
|
Content-Length: alpha\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever body",
|
|
)
|
|
.unwrap();
|
|
|
|
assert!(server.requests().unwrap().is_empty());
|
|
assert!(server.requests().unwrap().is_empty());
|
|
let mut buf: [u8; 198] = [0; 198];
|
|
assert!(socket.read(&mut buf[..]).unwrap() > 0);
|
|
let error_message = b"HTTP/1.1 400 \r\n\
|
|
Server: Firecracker API\r\n\
|
|
Connection: keep-alive\r\n\
|
|
Content-Type: application/json\r\n\
|
|
Content-Length: 80\r\n\r\n{ \"error\": \"Invalid header.\n\
|
|
All previous unanswered requests will be dropped.\" }";
|
|
assert_eq!(&buf[..], &error_message[..]);
|
|
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn test_wait_in_flight_responses() {
|
|
let path_to_socket = "/tmp/test_socket_http_server6.sock";
|
|
fs::remove_file(path_to_socket).unwrap_or_default();
|
|
|
|
let mut server = HttpServer::new(path_to_socket.to_string()).unwrap();
|
|
server.start_server().unwrap();
|
|
|
|
// Test a connection dropped and then a new one appearing
|
|
// before the user had a chance to send the response to the
|
|
// first one.
|
|
let mut first_socket = UnixStream::connect(path_to_socket).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
first_socket
|
|
.write_all(
|
|
b"PATCH /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 13\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever body",
|
|
)
|
|
.unwrap();
|
|
|
|
let mut req_vec = server.requests().unwrap();
|
|
let server_request = req_vec.remove(0);
|
|
|
|
first_socket.shutdown(std::net::Shutdown::Both).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
let mut second_socket = UnixStream::connect(path_to_socket).unwrap();
|
|
second_socket.set_nonblocking(true).unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
|
|
server
|
|
.enqueue_responses(vec![server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
})])
|
|
.unwrap();
|
|
assert!(server.requests().unwrap().is_empty());
|
|
assert_eq!(server.connections.len(), 1);
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(second_socket.read(&mut buf[..]).is_err());
|
|
|
|
second_socket
|
|
.write_all(
|
|
b"GET /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 20\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever second body",
|
|
)
|
|
.unwrap();
|
|
|
|
let mut req_vec = server.requests().unwrap();
|
|
let second_server_request = req_vec.remove(0);
|
|
|
|
assert_eq!(
|
|
second_server_request.request,
|
|
Request::try_from(
|
|
b"GET /machine-config HTTP/1.1\r\n\
|
|
Content-Length: 20\r\n\
|
|
Content-Type: application/json\r\n\r\nwhatever second body"
|
|
)
|
|
.unwrap()
|
|
);
|
|
|
|
server
|
|
.respond(second_server_request.process(|_request| {
|
|
let mut response = Response::new(Version::Http11, StatusCode::OK);
|
|
let response_body = b"response second body";
|
|
response.set_body(Body::new(response_body.to_vec()));
|
|
response
|
|
}))
|
|
.unwrap();
|
|
|
|
assert!(server.requests().unwrap().is_empty());
|
|
let mut buf: [u8; 1024] = [0; 1024];
|
|
assert!(second_socket.read(&mut buf[..]).unwrap() > 0);
|
|
second_socket.shutdown(std::net::Shutdown::Both).unwrap();
|
|
assert!(server.requests().is_ok());
|
|
fs::remove_file(path_to_socket).unwrap();
|
|
}
|
|
}
|