Hash :
83af3b3b
Author :
Thomas de Grivel
Date :
2017-04-02T14:46:53
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(in-package :thot)
(setf (debug-p :thot) t)
(eval-when (:compile-toplevel :load-toplevel :execute)
(unless (boundp '+crlf+)
(defconstant +crlf+
(coerce '(#\Return #\Newline) 'string))))
(defun read-line-crlf (stream)
(with-output-to-string (out)
(let ((cr))
(loop
(let ((c (read-char stream)))
(when cr
(when (char= #\Newline c)
(return))
(write-char cr out)
(setf cr nil))
(if (char= #\Return c)
(setf cr c)
(write-char c out)))))))
(defun read-until (end-char stream)
"Reads stream into a string until END-CHAR is read.
END-CHAR is not returned as part of the string."
(with-output-to-string (out)
(loop
(let ((c (read-char stream)))
(when (char= end-char c)
(return))
(write-char c out)))))
(defclass request ()
((socket :initarg :socket
:reader request-socket%
:type stream)
(method :initarg :method
:reader request-method%
:type symbol)
(url :initarg :url
:reader request-url%
:type string)
(uri :initform nil
:accessor request-uri%
:type string)
(query :initform nil
:accessor request-query%
:type string)
(http-version :initarg :http-version
:reader request-http-version%
:type string)
(headers :initform (make-hash-table :test 'equalp :size 32)
:reader request-headers%
:type hash-table)
(data :initform nil
:accessor request-data%
:type string)))
(defvar *request*)
(defun request-socket (&optional (request *request*))
(declare (type request request))
(request-socket% request))
(defun request-method (&optional (request *request*))
(declare (type request request))
(request-method% request))
(defun request-url (&optional (request *request*))
(declare (type request request))
(request-url% request))
(defun split-uri-query (&optional (request *request*))
(let* ((url (thot:request-url request))
(url-? (position #\? url))
(uri (if url-?
(subseq url 0 url-?)
url))
(query (if url-?
(subseq url url-?)
nil)))
(setf (request-uri% request) uri
(request-query% request) query)))
(defun request-uri (&optional (request *request*))
(unless (request-uri% request)
(split-uri-query request)
(request-uri% request)))
(defun request-http-version (&optional (request *request*))
(declare (type request request))
(request-http-version% request))
(defun request-headers (&optional (request *request*))
(declare (type request request))
(request-headers% request))
(defun request-header (name &optional (request *request*))
(gethash name (request-headers request)))
(defun request-content-length (&optional (request *request*))
(parse-integer (request-header "Content-Length" request)))
(defun request-data (&optional (request *request*))
(let* ((length (request-content-length request))
(data (make-array length :element-type '(unsigned-byte 8)))
(socket (request-socket request))
(encoding (flexi-streams:flexi-stream-external-format socket)))
(read-sequence data socket)
(babel:octets-to-string data :encoding encoding)))
(defun read-spaces (socket)
(loop
(unless (char= #\Space (peek-char nil socket))
(return))
(read-char socket)))
(defun read-header (socket headers)
(unless (and (char= #\Return (peek-char nil socket))
(read-char socket)
(char= #\Newline (read-char socket)))
(let ((name (read-until #\: socket)))
(read-spaces socket)
(let ((value (read-line-crlf socket)))
(when (debug-p (or :thot :http))
(format t "~&thot: ~A: ~A~%" name value))
(setf (gethash name headers) value)))))
(defun read-request (socket)
(let* ((method (find-symbol (read-until #\Space socket) :http-method))
(url (read-until #\Space socket))
(http-version (read-line-crlf socket))
(request (make-instance 'request :socket socket :method method
:url url :http-version http-version))
(headers (request-headers request)))
(when (debug-p (or :thot :http))
(format t "~&thot: ~A ~A ~A~%" method url http-version))
(loop
(unless (read-header socket headers)
(return)))
request))
(defclass reply ()
((status :initform nil
:accessor reply-status%)
(headers :initform nil
:accessor reply-headers%)
(headers-sent :initform nil
:accessor reply-headers-sent%)))
(defvar *reply*)
(defun reply-status (&optional (reply *reply*))
(declare (type reply reply))
(reply-status% reply))
(defsetf reply-status (&optional (reply '*reply*)) (value)
`(setf (reply-status% ,reply) ,value))
(defun reply-headers (&optional (reply *reply*))
(declare (type reply reply))
(reply-headers% reply))
(defsetf reply-headers (&optional (reply '*reply*)) (value)
`(setf (reply-headers% ,reply) ,value))
(defun reply-header (name &optional (reply *reply*))
(declare (type reply reply))
(let ((header (assoc name (reply-headers reply) :test #'string-equal)))
(when header
(rest header))))
(defun reply-headers-sent (&optional (reply *reply*))
(declare (type reply reply))
(reply-headers-sent% reply))
(defsetf reply-headers-sent (&optional (reply '*reply*)) (value)
`(setf (reply-headers-sent% ,reply) ,value))
(defun reply-content-length (&optional (reply *reply*))
(declare (type reply reply))
(parse-integer (reply-header 'content-length reply)))
(defun status (line)
(let ((status (reply-status)))
(when status
(error 'status-already-sent status line)))
(setf (reply-status) line)
(format (request-socket) "~A ~A~A" (request-http-version) line +crlf+))
(defun header (line)
(unless (reply-status)
(status "200 OK"))
(let ((headers (reply-headers)))
(if (endp headers)
(setf (reply-headers) (list line))
(loop
(when (endp (rest headers))
(setf (rest headers) (list line))
(return))
(pop headers))))
(format (request-socket) "~A~A" line +crlf+))
(defun end-headers ()
(unless (reply-headers-sent)
(setf (reply-headers-sent) t)
(header "")))
(defun content (string)
(end-headers)
(write-string string (request-socket)))
(defun 404-not-found ()
(status "404 Not found")
(header "Content-Type: text/plain")
(content (format nil "404 Not found
The requested url ~S was not found on this server."
(request-url *request*))))
(defun 404-not-found-handler ()
'404-not-found)
(defvar *url-handlers*
'(404-not-found-handler))
(defun handle-request (request)
(let ((handlers *url-handlers*)
(*request* request)
(*reply* (make-instance 'reply)))
(loop
(when (endp handlers)
(return))
(let* ((handler-func (pop handlers))
(handler (funcall handler-func)))
(when handler
(when (debug-p (or :thot :http))
(format t "~&~S -> ~S~%" handler-func handler))
(funcall handler)
(return))))))
(defun request-loop (socket)
(loop
(let ((request (read-request socket)))
(unless request
(return))
(handle-request request)
(unless (string-equal "keep-alive" (request-header 'connection request))
(return)))))
(defun acceptor-loop (fd)
(declare (type (unsigned-byte 31) fd))
(loop
(let ((clientfd (cffi-sockets:accept fd)))
(unless clientfd
(return))
(let ((socket (cffi-sockets-flexi:make-socket-stream clientfd)))
(unwind-protect (request-loop socket)
(close socket))))))
(defun start (&key (address "0.0.0.0") (port 8000))
(let ((fd (cffi-sockets:socket cffi-sockets:+af-inet+
cffi-sockets:+sock-stream+
0)))
(unwind-protect
(progn
(cffi-sockets:bind-inet fd address port)
(cffi-sockets:listen-sock fd 128)
(acceptor-loop fd))
(cffi-sockets:close-sock fd))))
(defvar *pipe-in*)
(defvar *pipe-out*)
(defun read-fd ()
(with-foreign-object (fd :int)
(let ((r (c-read *pipe-in* fd (foreign-type-size :int))))
(when (< r 0)
(error-errno "read"))
(when (< 0 r)
(mem-aref fd :int)))))
(defun write-fd (fd)
(with-foreign-object (fd% :int)
(setf (mem-aref fd% :int) fd)
(let ((w (c-write *pipe-out* fd% (foreign-type-size :int))))
(when (< w 0)
(error-errno "write"))
(when (< 0 w)
fd))))
(trace read-fd write-fd)
(defun worker-thread ()
(loop
(let ((sockfd (read-fd)))
(unless sockfd
(return))
(let ((socket (cffi-sockets-flexi:make-socket-stream sockfd)))
(unwind-protect (request-loop socket)
(close socket))))))
(defparameter *init-threads* 2)
(defvar *threads*)
(defun init-threads (n)
(loop
(when (<= (length *threads*) n)
(return))
(push (bordeaux-threads:make-thread #'worker-thread) *threads*)))
(defun join-threads ()
(loop
(when (endp *threads*)
(return))
(let ((thread (pop *threads*)))
(bordeaux-threads:join-thread thread))))
(defun acceptor-loop-threaded (fd)
(declare (type (unsigned-byte 31) fd))
(loop
(let ((clientfd (ignore-errors (cffi-sockets:accept fd))))
(unless clientfd
(return))
(format t "~&accept ~D~%" clientfd)
(write-fd clientfd))))
(defun start-threaded (&key (address "0.0.0.0") (port 8000))
(let ((fd (cffi-sockets:socket cffi-sockets:+af-inet+
cffi-sockets:+sock-stream+
0)))
(unwind-protect
(progn
(cffi-sockets:bind-inet fd address port)
(cffi-sockets:listen-sock fd 128)
(multiple-value-bind (*pipe-in* *pipe-out*) (pipe)
(let ((*threads*))
(init-threads *init-threads*)
(unwind-protect (acceptor-loop-threaded fd)
(join-threads)))))
(cffi-sockets:close-sock fd))))