open Printf;;
open Http_common;;
+open Http_types;;
+open Http_constants;;
open Http_parser;;
-let debug = true
-let debug_print str =
- if debug then begin
- prerr_endline ("DEBUG: " ^ str);
- flush stderr
- end
-
-let default_addr = "0.0.0.0"
-let default_port = 80
-let default_timeout = 300
-let default_mode = `Fork
-
(** send raw data on outchan, flushing it afterwards *)
let send_raw ~data outchan =
output_string outchan data;
let send_CRLF = send_raw ~data:crlf
- (** TODO perform some sanity test on header and value *)
let send_header ~header ~value =
+ Http_parser_sanity.heal_header (header, value);
send_raw ~data:(header ^ ": " ^ value ^ crlf)
let send_headers ~headers outchan =
(match code, status with
| Some c, None -> c
| None, Some s -> code_of_status s
- | Some _, Some _ ->
+ | Some _, Some _ -> (* TODO use some static type checking *)
failwith (func_name ^ " you must give 'code' or 'status', not both")
- | None, None ->
+ | None, None -> (* TODO use some static type checking *)
failwith (func_name ^ " you must give 'code' or 'status', not none"))
(** internal: low level for send_status_line *)
" "
[ string_of_version version;
string_of_int code;
- reason_phrase_of_code code ]
+ Http_misc.reason_phrase_of_code code ]
in
send_raw ~data:(status_line ^ crlf)
representing an HTML document that explains the meaning of given status code.
Additional data can be added to the body via 'body' argument *)
let foo_body code body =
- let reason_phrase = reason_phrase_of_code code in
+ let reason_phrase = Http_misc.reason_phrase_of_code code in
sprintf
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">
<HTML><HEAD>
of an HTTP response; body, if given, will be appended to the body *)
let send_foo_body code body = send_raw ~data:(foo_body code body)
- (* TODO add the computation of Content-Length header *)
let respond
+ (* Warning: keep default values in sync with Http_response.response class *)
?(body = "") ?(headers = [])
?(version = http_version) ?(code = 200) ?status outchan
=
in
send_basic_headers ~version ~code outchan;
send_headers ~headers outchan;
+ send_header "Content-Length" (string_of_int (String.length body)) outchan;
send_CRLF outchan;
send_raw ~data:body outchan
*)
end
- (* TODO sanity tests on location *)
let respond_redirect
~location ?(body = "") ?(version = http_version) ?(code = 301) ?status outchan
=
send_empty_response
"Daemon.respond_permission_denied" ~body:"" () ~version ~code:403 outchan
-let send_file ?name ?file outchan =
+(* let send_file ?name ?file outchan = *)
+let send_file ~src outchan =
let buflen = 1024 in
let buf = String.make buflen ' ' in
+(*
let (file, cleanup) =
(match (name, file) with
| Some n, None -> (* if we open the file, we close it before returning *)
let f = open_in n in
f, (fun () -> close_in f)
| None, Some f -> (f, (fun () -> ()))
- | _ -> failwith "Daemon.send_file: either name or file must be given")
+ | _ -> (* TODO use some static type checking *)
+ failwith "Daemon.send_file: either name or file must be given")
+ in
+*)
+ let (file, cleanup) =
+ match src with
+ | FileSrc fname -> (* if we open the file, we close it before returning *)
+ let f = open_in fname in
+ f, (fun () -> close_in f)
+ | InChanSrc inchan -> inchan, ignore
in
try
while true do
~value:(string_of_int (Http_misc.filesize fname))
outchan;
send_CRLF outchan;
- send_file ~file outchan;
+ send_file ~src:(InChanSrc file) outchan;
close_in file
end
with
res#serialize outchan;
flush outchan
+ (** internal: this exception is raised after a malformed request has been read
+ by a serving process to signal main server (or itself if mode = `Single) to
+ skip to next request *)
+exception Again;;
+
+let pp_parse_exc e =
+ sprintf "HTTP request parse error: %s" (Printexc.to_string e)
+
+ (* given a Http_parser.parse_request like function, wrap it in a function that
+ do the same and additionally catch parsing exception sending HTTP error
+ messages back to client as needed. Returned function raises Again when it
+ encounter a parse error (name 'Again' is intended for future versions that
+ will support http keep alive signaling that a new request has to be parsed
+ from client) *)
+let rec wrap_parse_request_w_safety parse_function inchan outchan =
+(* try *)
+ (try
+ parse_function inchan
+ with
+ | (End_of_file) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error ~code:400 ~body:"Unexpected End Of File" outchan;
+ raise Again
+ | (Malformed_request req) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error
+ ~code:400
+ ~body:(
+ "request 1st line format should be: '<method> <url> <version>'" ^
+ "<br />\nwhile received request 1st line was:<br />\n" ^ req)
+ outchan;
+ raise Again
+ | (Invalid_HTTP_method meth) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error
+ ~code:501
+ ~body:("Method '" ^ meth ^ "' isn't supported (yet)")
+ outchan;
+ raise Again
+ | (Malformed_request_URI uri) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error ~code:400 ~body:("Malformed URL: '" ^ uri ^ "'") outchan;
+ raise Again
+ | (Invalid_HTTP_version version) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error
+ ~code:505
+ ~body:("HTTP version '" ^ version ^ "' isn't supported (yet)")
+ outchan;
+ raise Again
+ | (Malformed_query query) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error
+ ~code:400 ~body:(sprintf "Malformed query string '%s'" query) outchan;
+ raise Again
+ | (Malformed_query_part (binding, query)) as e ->
+ debug_print (pp_parse_exc e);
+ respond_error
+ ~code:400
+ ~body:(
+ sprintf "Malformed query part '%s' in query '%s'" binding query)
+ outchan;
+ raise Again)
+(* (* preliminary support for HTTP keep alive connections ... *)
+ with Again ->
+ wrap_parse_request_w_safety parse_function inchan outchan
+*)
+
+ (* wrapper around Http_parser.parse_request which catch parsing exceptions and
+ return error messages to client as needed
+ @param inchan in_channel from which read incoming requests
+ @param outchan out_channl on which respond with error messages if needed
+ *)
+let safe_parse_request = wrap_parse_request_w_safety parse_request
+
+ (* as above but for OO version (Http_parser.parse_request') *)
+let safe_parse_request' = wrap_parse_request_w_safety (new Http_request.request)
+
+let chdir_to_document_root = function (* chdir to document root *)
+ | Some dir -> Sys.chdir dir
+ | None -> ()
+
+let server_of_mode = function
+ | `Single -> Http_tcp_server.simple
+ | `Fork -> Http_tcp_server.fork
+ | `Thread -> Http_tcp_server.thread
+
+ (* TODO what happens when a Quit exception is raised by a callback? Do other
+ callbacks keep on living until the end or are them all killed immediatly?
+ The right semantics should obviously be the first one *)
+
(* TODO support also chroot to 'root', not only chdir *)
(* curried request *)
let start
?(addr = default_addr) ?(port = default_port)
?(timeout = Some default_timeout) ?(mode = default_mode) ?root callback
=
- (match root with (* chdir to document root *)
- | Some dir -> Sys.chdir dir
- | None -> ());
- let sockaddr = Unix.ADDR_INET (Unix.inet_addr_of_string addr, port) in
+ chdir_to_document_root root;
+ let sockaddr = Http_misc.build_sockaddr (addr, port) in
let daemon_callback inchan outchan =
try
- let (path, parameters) = Http_parser.parse_request inchan in
+ let (path, parameters) = safe_parse_request inchan outchan in
callback path parameters outchan;
flush outchan
- with
- | End_of_file ->
- respond_error ~code:400 ~body:"Unexpected End Of File" outchan
- | Malformed_request req ->
- respond_error
- ~code:400
- ~body:(
- "request 1st line format should be: '<method> <url> <version>'" ^
- "<br />\nwhile received request 1st line was:<br />\n" ^ req)
- outchan
- | Unsupported_method meth ->
- respond_error
- ~code:501
- ~body:("Method '" ^ meth ^ "' isn't supported (yet)")
- outchan
- | Malformed_request_URI uri ->
- respond_error ~code:400 ~body:("Malformed URL: '" ^ uri ^ "'") outchan
- | Unsupported_HTTP_version version ->
- respond_error
- ~code:505
- ~body:("HTTP version '" ^ version ^ "' isn't supported (yet)")
- outchan
- | Malformed_query query ->
- respond_error
- ~code:400 ~body:(sprintf "Malformed query string '%s'" query) outchan
- | Malformed_query_binding (binding, query) ->
- respond_error
- ~code:400
- ~body:(
- sprintf "Malformed query element '%s' in query '%s'" binding query)
- outchan
+ with Again -> ()
in
- match mode with
- | `Single -> Http_tcp_server.simple ~sockaddr ~timeout daemon_callback
- | `Fork -> Http_tcp_server.ocaml_builtin ~sockaddr ~timeout daemon_callback
- | `Thread -> Http_tcp_server.thread ~sockaddr ~timeout daemon_callback
+ try
+ (server_of_mode mode) ~sockaddr ~timeout daemon_callback
+ with Quit -> ()
(* OO request *)
let start'
?(addr = default_addr) ?(port = default_port)
?(timeout = Some default_timeout) ?(mode = default_mode) ?root callback
=
- let wrapper path params outchan =
- let req = new Http_request.request ~path ~params in
- callback req outchan
+ chdir_to_document_root root;
+ let sockaddr = Http_misc.build_sockaddr (addr, port) in
+ let daemon_callback inchan outchan =
+ try
+ let req = safe_parse_request' inchan outchan in
+ callback req outchan;
+ flush outchan
+ with Again -> ()
in
- match root with
- | None -> start ~addr ~port ~timeout ~mode wrapper
- | Some root -> start ~addr ~port ~timeout ~mode ~root wrapper
+ try
+ (server_of_mode mode) ~sockaddr ~timeout daemon_callback
+ with Quit -> ()
module Trivial =
struct
start ~addr ~port callback
end
+ (* @param inchan input channel connected to client
+ @param outchan output channel connected to client
+ @param sockaddr client socket address *)
+class connection inchan outchan sockaddr =
+ (* ASSUMPTION: inchan and outchan are channels built on top of the same
+ Unix.file_descr thus closing one of them will close also the other *)
+ let close' o = o#close in
+ object (self)
+
+ initializer Gc.finalise close' self
+
+ val mutable closed = false
+
+ method private assertNotClosed =
+ if closed then
+ failwith "Http_daemon.connection: connection is closed"
+
+ method getRequest =
+ self#assertNotClosed;
+ try
+ Some (safe_parse_request' inchan outchan)
+ with Again -> None
+
+ method respond_with res =
+ self#assertNotClosed;
+ respond_with res outchan
+
+ method close =
+ self#assertNotClosed;
+ close_in inchan; (* this close also outchan *)
+ closed <- true
+
+ end
+
+class daemon ?(addr = "0.0.0.0") ?(port = 80) () =
+ object (self)
+
+ val suck =
+ Http_tcp_server.init_socket (Http_misc.build_sockaddr (addr, port))
+
+ method accept =
+ let (cli_suck, cli_sockaddr) = Unix.accept suck in (* may block *)
+ let (inchan, outchan) =
+ (Unix.in_channel_of_descr cli_suck, Unix.out_channel_of_descr cli_suck)
+ in
+ new connection inchan outchan cli_sockaddr
+
+ method getRequest =
+ let conn = self#accept in
+ match conn#getRequest with
+ | None ->
+ conn#close;
+ self#getRequest
+ | Some req -> (req, conn)
+
+ end
+
projects / helm.git / blobdiff