Source file ocsigen_parseconfig.ml
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(** Config file parsing *)
open Xml
open Ocsigen_config
module Netstring_pcre = Ocsigen_lib.Netstring_pcre
let section = Lwt_log.Section.make "ocsigen:config"
let blah_of_string f tag s =
try f (Ocsigen_lib.String.remove_spaces s 0 (String.length s - 1))
with Failure _ ->
raise
(Ocsigen_config.Config_file_error
("While parsing <" ^ tag ^ "> - " ^ s ^ " is not a valid value."))
let int_of_string = blah_of_string int_of_string
let float_of_string = blah_of_string float_of_string
let default_default_hostname =
let hostname = Unix.gethostname () in
try
(List.hd
(Unix.getaddrinfo hostname "www"
[Unix.AI_CANONNAME; Unix.AI_SOCKTYPE Unix.SOCK_STREAM]))
.Unix.ai_canonname
with Failure _ ->
Lwt_log.ign_warning_f ~section
"Cannot determine default host name. Will use \"%s\" to create absolute links or redirections dynamically if you do not set <host defaulthostname=\"...\" ...> in config file."
hostname;
hostname
let parse_size =
let kilo = Int64.of_int 1000 in
let mega = Int64.of_int 1000000 in
let giga = Int64.mul kilo mega in
let tera = Int64.mul mega mega in
let kibi = Int64.of_int 1024 in
let mebi = Int64.of_int 1048576 in
let gibi = Int64.mul kibi mebi in
let tebi = Int64.mul mebi mebi in
fun s ->
let l = String.length s in
let s = Ocsigen_lib.String.remove_spaces s 0 (l - 1) in
let v l =
try Int64.of_string (String.sub s 0 l)
with Failure _ -> failwith "Ocsigen_parseconfig.parse_size"
in
let o l =
let l1 = l - 1 in
if l1 > 0
then
let c1 = s.[l1] in
if c1 = 'o' || c1 = 'B' then v l1 else v l
else v l
in
if s = "" || s = "infinity"
then None
else
Some
(let l = String.length s in
let l1 = l - 1 in
if l1 > 0
then
let c1 = String.sub s l1 1 in
if c1 = "T"
then Int64.mul tebi (v l1)
else if c1 = "G"
then Int64.mul gibi (v l1)
else if c1 = "M"
then Int64.mul mebi (v l1)
else if c1 = "k"
then Int64.mul kibi (v l1)
else
let l2 = l - 2 in
if l2 > 0
then
let c2 = String.sub s l2 2 in
if c2 = "To" || c2 = "TB"
then Int64.mul tera (v l2)
else if c2 = "Go" || c2 = "GB"
then Int64.mul giga (v l2)
else if c2 = "Mo" || c2 = "MB"
then Int64.mul mega (v l2)
else if c2 = "ko" || c2 = "kB"
then Int64.mul kilo (v l2)
else
let l3 = l - 3 in
if l3 > 0
then
let c3 = String.sub s l3 3 in
if c3 = "Tio" || c3 = "TiB"
then Int64.mul tebi (v l3)
else if c3 = "Gio" || c3 = "GiB"
then Int64.mul gibi (v l3)
else if c3 = "Mio" || c3 = "MiB"
then Int64.mul mebi (v l3)
else if c3 = "kio" || c3 = "kiB"
then Int64.mul kibi (v l3)
else o l
else o l
else o l
else o l)
let parse_size_tag tag s =
try parse_size s
with Failure _ ->
raise
(Ocsigen_config.Config_file_error
("While parsing <" ^ tag ^ "> - " ^ s ^ " is not a valid size."))
let rec parse_string = function
| [] -> ""
| PCData s :: l -> s ^ parse_string l
| _ -> failwith "ocsigen_parseconfig.parse_string"
let parse_string_tag tag s =
try parse_string s
with Failure _ ->
raise
(Ocsigen_config.Config_file_error
("While parsing <" ^ tag ^ "> - String expected."))
let parser_config =
let rec parse_servers n = function
| [] -> (
match n with
| [] -> raise (Config_file_error "<server> tag expected")
| _ -> n)
| Element ("server", [], nouveau) :: ll ->
(match ll with
| [] -> ()
| _ ->
Lwt_log.ign_warning ~section
"At most one <server> tag possible in config file. Ignoring trailing data.");
parse_servers (n @ [nouveau]) []
| _ -> raise (Config_file_error "syntax error inside <ocsigen>")
in
function
| Element ("ocsigen", [], l) -> parse_servers [] l
| _ -> raise (Config_file_error "<ocsigen> tag expected")
let parse_ext file = parser_config (Xml.parse_file file)
let preloadfile config () = Ocsigen_extensions.set_config config
let postloadfile () = Ocsigen_extensions.set_config []
let correct_hostname =
let regexp = Netstring_pcre.regexp "^[a-zA-Z0-9]+((\\.|-)[a-zA-Z0-9]+)*$" in
fun h -> Netstring_pcre.string_match regexp h 0 <> None
let parse_host_field =
let h = Hashtbl.create 17 in
fun (hostfilter : string option) ->
try Hashtbl.find h hostfilter
with Not_found ->
let r =
match hostfilter with
| None -> ["*", Netstring_pcre.regexp ".*$", None]
| Some s ->
let parse_one_host ss =
let host, port =
try
let dppos = String.index ss ':' and len = String.length ss in
let host = String.sub ss 0 dppos
and port =
match String.sub ss (dppos + 1) (len - dppos - 1) with
| "*" -> None
| p -> Some (int_of_string "host" p)
in
host, port
with
| Not_found -> ss, None
| Failure _ -> raise (Config_file_error "bad port number")
in
let split_host = function
| Str.Delim _ -> ".*"
| Str.Text t -> Re.Pcre.quote t
in
( host
, Netstring_pcre.regexp
(String.concat ""
(List.map split_host
(Str.full_split (Str.regexp "[*]+") host)
@ ["$"]))
, port )
in
List.map parse_one_host (Str.split (Str.regexp "[ \t]+") s)
in
Hashtbl.add h hostfilter r;
(r : Ocsigen_extensions.virtual_hosts)
let get_defaulthostname ~defaulthostname ~host =
match defaulthostname with
| Some d -> d
| None ->
let rec aux = function
| [] -> default_default_hostname
| (t, _, (Some 80 | None)) :: _ when not (String.contains t '*') -> t
| _ :: q -> aux q
in
let host = aux host in
Lwt_log.ign_warning_f ~section
"While parsing config file, tag <host>: No defaulthostname, assuming it is \"%s\""
host;
if correct_hostname host
then host
else
raise (Ocsigen_config.Config_file_error ("Incorrect hostname " ^ host))
let later_pass_host_attr
(name, charset, defaulthostname, defaulthttpport, defaulthttpsport, ishttps)
= function
| "hostfilter", s -> (
match name with
| None ->
( Some s
, charset
, defaulthostname
, defaulthttpport
, defaulthttpsport
, ishttps )
| _ ->
raise
(Ocsigen_config.Config_file_error "Duplicate attribute name in <host>")
)
| "charset", s -> (
match charset with
| None ->
( name
, Some s
, defaulthostname
, defaulthttpport
, defaulthttpsport
, ishttps )
| _ ->
raise
(Ocsigen_config.Config_file_error
"Duplicate attribute charset in <host>"))
| "defaulthostname", s -> (
match defaulthostname with
| None ->
if correct_hostname s
then name, charset, Some s, defaulthttpport, defaulthttpsport, ishttps
else
raise (Ocsigen_config.Config_file_error ("Incorrect hostname " ^ s))
| _ ->
raise
(Ocsigen_config.Config_file_error
"Duplicate attribute defaulthostname in <host>"))
| "defaulthttpport", s -> (
match defaulthttpport with
| None -> name, charset, defaulthostname, Some s, defaulthttpsport, ishttps
| _ ->
raise
(Ocsigen_config.Config_file_error
"Duplicate attribute defaulthttpport in <host>"))
| "defaulthttpsport", s -> (
match defaulthttpsport with
| None -> name, charset, defaulthostname, defaulthttpport, Some s, ishttps
| _ ->
raise
(Ocsigen_config.Config_file_error
"Duplicate attribute defaulthttpsport in <host>"))
| "defaultprotocol", s -> (
match ishttps with
| None ->
( name
, charset
, defaulthostname
, defaulthttpport
, defaulthttpsport
, Some s )
| _ ->
raise
(Ocsigen_config.Config_file_error
"Duplicate attribute defaultprotocol in <host>"))
| attr, _ ->
raise
(Ocsigen_config.Config_file_error ("Wrong attribute for <host>: " ^ attr))
let later_pass_host attrs l =
let ( host
, charset
, defaulthostname
, defaulthttpport
, defaulthttpsport
, defaultprotocol )
=
List.fold_left later_pass_host_attr
(None, None, None, None, None, None)
(List.rev attrs)
in
let host = parse_host_field host in
let charset =
match charset, Ocsigen_config.get_default_charset () with
| Some charset, _ | None, Some charset -> charset
| None, None -> "utf-8"
and defaulthttpport =
match defaulthttpport with
| None -> Ocsigen_config.get_default_port ()
| Some p -> int_of_string "host" p
and defaulthostname = get_defaulthostname ~defaulthostname ~host
and defaulthttpsport =
match defaulthttpsport with
| None -> Ocsigen_config.get_default_sslport ()
| Some p -> int_of_string "host" p
and serve_everything =
{ Ocsigen_extensions.do_not_serve_regexps = []
; do_not_serve_files = []
; do_not_serve_extensions = [] }
in
let conf =
{ Ocsigen_extensions.default_hostname = defaulthostname
; default_httpport = defaulthttpport
; default_httpsport = defaulthttpsport
; default_protocol_is_https = defaultprotocol = Some "https"
; mime_assoc = Ocsigen_charset_mime.default_mime_assoc ()
; charset_assoc =
Ocsigen_charset_mime.empty_charset_assoc ~default:charset ()
; default_directory_index = ["index.html"]
; list_directory_content = false
; follow_symlinks = `Owner_match
; do_not_serve_404 = serve_everything
; do_not_serve_403 = serve_everything
; uploaddir = Ocsigen_config.get_uploaddir ()
; maxuploadfilesize = Ocsigen_config.get_maxuploadfilesize () }
in
let parse_config =
Ocsigen_extensions.make_parse_config []
(Ocsigen_extensions.parse_config_item None host conf)
in
host, conf, parse_config l
let later_pass_extension tag attrs l =
match attrs with
| [] ->
raise
(Config_file_error
("missing module, name or findlib-package attribute in " ^ tag))
| [("name", s)] ->
Ocsigen_loader.init_module (preloadfile l) postloadfile false s
| [("module", s)] ->
Ocsigen_loader.loadfiles (preloadfile l) postloadfile false [s]
| [("findlib-package", s)] ->
Ocsigen_loader.loadfiles (preloadfile l) postloadfile false
(Ocsigen_loader.findfiles s)
| _ -> raise (Config_file_error ("Wrong attribute for " ^ tag))
let rec later_pass_extconf dir =
let f acc s =
if Filename.check_suffix s "conf"
then
match
let filename = dir ^ "/" ^ s in
try
Lwt_log.ign_info_f ~section "Parsing configuration file %s" filename;
parse_ext filename
with e ->
Lwt_log.ign_error_f ~section ~exn:e
"Error while loading configuration file %s (ignored)" filename;
[]
with
| [] -> acc
| s :: _ -> acc @ later_pass s
else acc
in
try
let files = Sys.readdir dir in
Array.sort compare files; Array.fold_left f [] files
with Sys_error _ as e ->
Lwt_log.ign_error ~section ~exn:e
"Error while loading configuration file (ignored)";
[]
and later_pass = function
| [] -> []
| Element ("port", _atts, _p) :: ll -> later_pass ll
| Element (("charset" as st), _atts, p) :: ll ->
set_default_charset (Some (parse_string_tag st p));
later_pass ll
| Element ("logdir", [], _p) :: ll -> later_pass ll
| Element ("syslog", [], _p) :: ll -> later_pass ll
| Element ("ssl", [], _p) :: ll -> later_pass ll
| Element ("user", [], _p) :: ll -> later_pass ll
| Element ("group", [], _p) :: ll -> later_pass ll
| Element (("uploaddir" as st), [], p) :: ll ->
set_uploaddir (Some (parse_string_tag st p));
later_pass ll
| Element (("datadir" as st), [], p) :: ll ->
set_datadir (parse_string_tag st p);
later_pass ll
| Element ("minthreads", [], _p) :: ll -> later_pass ll
| Element ("maxthreads", [], _p) :: ll -> later_pass ll
| Element (("maxdetachedcomputationsqueued" as st), [], p) :: ll ->
set_max_number_of_threads_queued
(int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("maxconnected" as st), [], p) :: ll ->
set_max_number_of_connections (int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("mimefile" as st), [], p) :: ll ->
Ocsigen_config.set_mimefile (parse_string_tag st p);
later_pass ll
| Element (("maxretries" as st), [], p) :: ll ->
set_maxretries (int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("timeout" as st), [], p) :: ll
| Element (("clienttimeout" as st), [], p) :: ll ->
set_client_timeout (int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("servertimeout" as st), [], p) :: ll ->
set_server_timeout (int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("netbuffersize" as st), [], p) :: ll ->
Ocsigen_stream.set_net_buffer_size
(int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("filebuffersize" as st), [], p) :: ll ->
set_filebuffersize (int_of_string st (parse_string_tag st p));
later_pass ll
| Element (("maxrequestbodysize" as st), [], p) :: ll ->
set_maxrequestbodysize (parse_size_tag st (parse_string_tag st p));
later_pass ll
| Element (("maxuploadfilesize" as st), [], p) :: ll ->
set_maxuploadfilesize (parse_size_tag st (parse_string_tag st p));
later_pass ll
| Element (("commandpipe" as st), [], p) :: ll ->
set_command_pipe (parse_string_tag st p);
later_pass ll
| Element (("shutdowntimeout" as st), [], p) :: ll ->
set_shutdown_timeout
(match parse_string_tag st p with
| "notimeout" -> None
| p -> Some (float_of_string st p));
later_pass ll
| Element ("debugmode", [], []) :: ll -> set_debugmode true; later_pass ll
| Element ("usedefaulthostname", [], []) :: ll ->
set_usedefaulthostname true;
later_pass ll
| Element ("disablepartialrequests", [], []) :: ll ->
set_disablepartialrequests true;
later_pass ll
| Element ("respectpipeline", [], []) :: ll ->
set_respect_pipeline (); later_pass ll
| Element ("findlib", [("path", p)], []) :: ll ->
Ocsigen_loader.add_ocamlpath p;
later_pass ll
| Element ("require", atts, l) :: ll | Element ("extension", atts, l) :: ll ->
later_pass_extension "<extension>" atts l;
later_pass ll
| Element ("library", atts, l) :: ll ->
later_pass_extension "<library>" atts l;
later_pass ll
| Element ("host", atts, l) :: ll ->
let h = later_pass_host atts l in
h :: later_pass ll
| Element ("extconf", [("dir", dir)], []) :: ll ->
let h = later_pass_extconf dir in
h @ later_pass ll
| Element (tag, _, _) :: _ ->
raise (Config_file_error ("tag <" ^ tag ^ "> unexpected inside <server>"))
| _ -> raise (Config_file_error "Syntax error")
let later_pass l = Ocsigen_extensions.set_hosts (later_pass l)
let parse_port =
let all_ipv6 = Netstring_pcre.regexp "^\\[::\\]:([0-9]+)$" in
let all_ipv4 = Netstring_pcre.regexp "^\\*:([0-9]+)$" in
let single_ipv6 = Netstring_pcre.regexp "^\\[([0-9A-Fa-f.:]+)\\]:([0-9]+)$" in
let single_ipv4 = Netstring_pcre.regexp "^([0-9.]+):([0-9]+)$" in
fun s ->
let do_match r = Netstring_pcre.string_match r s 0 in
let get x i = Netstring_pcre.matched_group x i s in
match do_match all_ipv6 with
| Some r -> `IPv6 Unix.inet6_addr_any, int_of_string "port" (get r 1)
| None -> (
match do_match all_ipv4 with
| Some r -> `IPv4 Unix.inet_addr_any, int_of_string "port" (get r 1)
| None -> (
match do_match single_ipv6 with
| Some r ->
( `IPv6 (Unix.inet_addr_of_string (get r 1))
, int_of_string "port" (get r 2) )
| None -> (
match do_match single_ipv4 with
| Some r ->
( `IPv4 (Unix.inet_addr_of_string (get r 1))
, int_of_string "port" (get r 2) )
| None -> `All, int_of_string "port" s)))
let parse_facility = function
| "auth" -> `Auth
| "authpriv" -> `Authpriv
| "console" -> `Console
| "cron" -> `Cron
| "daemon" -> `Daemon
| "ftp" -> `FTP
| "kernel" -> `Kernel
| "lpr" -> `LPR
| "local0" -> `Local0
| "local1" -> `Local1
| "local2" -> `Local2
| "local3" -> `Local3
| "local4" -> `Local4
| "local5" -> `Local5
| "local6" -> `Local6
| "local7" -> `Local7
| "mail" -> `Mail
| "ntp" -> `NTP
| "news" -> `News
| "security" -> `Security
| "syslog" -> `Syslog
| "uucp" -> `UUCP
| "user" -> `User
| t -> raise (Config_file_error ("Unknown " ^ t ^ " facility in <syslog>"))
let config_error_for_some s = function
| None -> ()
| _ -> raise (Config_file_error s)
let make_ssl_info ~certificate ~privatekey ~ciphers ~dhfile ~curve =
{ Ocsigen_config.ssl_certificate = certificate
; ssl_privatekey = privatekey
; ssl_ciphers = ciphers
; ssl_dhfile = dhfile
; ssl_curve = curve }
let rec parse_ssl l ~certificate ~privatekey ~ciphers ~dhfile ~curve =
match l with
| [] -> Some (make_ssl_info ~certificate ~privatekey ~ciphers ~dhfile ~curve)
| Element (("certificate" as st), [], p) :: l ->
config_error_for_some "Two certificates inside <ssl>" certificate;
let certificate = Some (parse_string_tag st p) in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve l
| Element (("privatekey" as st), [], p) :: l ->
config_error_for_some "Two private keys inside <ssl>" privatekey;
let privatekey = Some (parse_string_tag st p) in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve l
| Element (("ciphers" as st), [], p) :: l ->
config_error_for_some "Two cipher strings inside <ssl>" ciphers;
let ciphers = Some (parse_string_tag st p) in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve l
| Element (("dhfile" as st), [], p) :: l ->
config_error_for_some "Two DH files inside <ssl>" dhfile;
let dhfile = Some (parse_string_tag st p) in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve l
| Element (("curve" as st), [], p) :: l ->
config_error_for_some "Two (EC) curves inside <ssl>" curve;
let curve = Some (parse_string_tag st p) in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve l
| Element (tag, _, _) :: _l ->
raise (Config_file_error ("<" ^ tag ^ "> tag unexpected inside <ssl>"))
| _ -> raise (Config_file_error "Unexpected content inside <ssl>")
let first_pass c =
let rec aux user group ssl ports sslports = function
| [] -> (user, group), (ssl, ports, sslports)
| Element (("logdir" as st), [], p) :: ll ->
set_logdir (parse_string_tag st p);
aux user group ssl ports sslports ll
| Element (("syslog" as st), [], p) :: ll ->
let str = String.lowercase_ascii (parse_string_tag st p) in
set_syslog_facility (Some (parse_facility str));
aux user group ssl ports sslports ll
| Element (("port" as st), atts, p) :: ll -> (
match atts with
| [] | [("protocol", "HTTP")] ->
let po =
try parse_port (parse_string_tag st p)
with Failure _ ->
raise (Config_file_error "Wrong value for <port> tag")
in
aux user group ssl (po :: ports) sslports ll
| [("protocol", "HTTPS")] ->
let po =
try parse_port (parse_string_tag st p)
with Failure _ ->
raise (Config_file_error "Wrong value for <port> tag")
in
aux user group ssl ports (po :: sslports) ll
| _ -> raise (Config_file_error "Wrong attribute for <port>"))
| Element (("minthreads" as st), [], p) :: ll ->
set_minthreads (int_of_string st (parse_string_tag st p));
aux user group ssl ports sslports ll
| Element (("maxthreads" as st), [], p) :: ll ->
set_maxthreads (int_of_string st (parse_string_tag st p));
aux user group ssl ports sslports ll
| Element ("ssl", [], p) :: ll -> (
match ssl with
| None ->
let ssl =
let certificate = None
and privatekey = None
and ciphers = None
and dhfile = None
and curve = None in
parse_ssl ~certificate ~privatekey ~ciphers ~dhfile ~curve p
in
aux user group ssl ports sslports ll
| _ ->
raise
(Config_file_error
"Only one ssl certificate for each server supported for now"))
| Element (("user" as st), [], p) :: ll -> (
match user with
| None -> aux (Some (parse_string_tag st p)) group ssl ports sslports ll
| _ ->
raise
(Config_file_error "Only one <user> tag for each server allowed"))
| Element (("group" as st), [], p) :: ll -> (
match group with
| None -> aux user (Some (parse_string_tag st p)) ssl ports sslports ll
| _ ->
raise
(Config_file_error "Only one <group> tag for each server allowed"))
| Element (("commandpipe" as st), [], p) :: ll ->
set_command_pipe (parse_string_tag st p);
aux user group ssl ports sslports ll
| Element _ :: ll -> aux user group ssl ports sslports ll
| _ -> raise (Config_file_error "Syntax error")
in
let (user, group), (si, ports, ssl_ports) = aux None None None [] [] c in
let user =
match user with
| None -> None
| Some s -> if s = "" then None else Some s
in
let group =
match group with
| None -> None
| Some s -> if s = "" then None else Some s
in
Ocsigen_config.set_user user;
Ocsigen_config.set_group group;
Ocsigen_config.set_ssl_info si;
Ocsigen_config.set_ports ports;
Ocsigen_config.set_ssl_ports ssl_ports;
()
let parse_config ?file () =
let file =
match file with None -> Ocsigen_config.get_config_file () | Some f -> f
in
parser_config (Xml.parse_file file)