xref: /freebsd/usr.sbin/bsdconfig/share/media/http.subr (revision 0b57cec536236d46e3dba9bd041533462f33dbb7)
1if [ ! "$_MEDIA_HTTP_SUBR" ]; then _MEDIA_HTTP_SUBR=1
2#
3# Copyright (c) 2012-2013 Devin Teske
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD$
28#
29############################################################ INCLUDES
30
31BSDCFG_SHARE="/usr/share/bsdconfig"
32. $BSDCFG_SHARE/common.subr || exit 1
33f_dprintf "%s: loading includes..." media/http.subr
34f_include $BSDCFG_SHARE/device.subr
35f_include $BSDCFG_SHARE/dialog.subr
36f_include $BSDCFG_SHARE/media/common.subr
37f_include $BSDCFG_SHARE/media/tcpip.subr
38f_include $BSDCFG_SHARE/strings.subr
39f_include $BSDCFG_SHARE/struct.subr
40f_include $BSDCFG_SHARE/variable.subr
41
42BSDCFG_LIBE="/usr/libexec/bsdconfig"
43f_include_lang $BSDCFG_LIBE/include/messages.subr
44
45############################################################ GLOBALS
46
47HTTP_SKIP_RESOLV=
48
49URL_MAX=261261
50	# NOTE: This is according to actual fetch(1) test-results. We actually
51	# use nc(1) to retrieve files, but it's still a good idea to keep the
52	# URLs short enough that fetch(1) won't complain.
53
54HTTP_DIRS="
55	.
56	releases/$UNAME_P
57	snapshots/$UNAME_P
58	pub/FreeBSD
59	pub/FreeBSD/releases/$UNAME_P
60	pub/FreeBSD/snapshots/$UNAME_P
61	pub/FreeBSD-Archive/old-releases/$UNAME_P
62" # END-QUOTE
63
64############################################################ FUNCTIONS
65
66# f_dialog_menu_media_http
67#
68# Prompt the user to select from a range of ``built-in'' HTTP servers or
69# specify their own. If the user makes a choice and doesn't cancel or press
70# Esc, stores the user's choice in VAR_FTP_PATH (see variable.subr) and returns
71# success.
72#
73f_dialog_menu_media_http()
74{
75	f_dialog_title "$msg_please_select_a_freebsd_http_distribution_site"
76	local title="$DIALOG_TITLE" btitle="$DIALOG_BACKTITLE"
77	f_dialog_title_restore
78	local prompt="$msg_please_select_the_site_closest_to_you_or_other"
79	local menu_list="
80		'dist $msg_main_site' 'ftp.freebsd.org'
81		'pkg $msg_main_site'  'pkg.freebsd.org'
82		'URL'                 '$msg_specify_some_other_http_site'
83	" # END-QUOTE
84	local hline="$msg_select_a_site_thats_close"
85
86	local height width rows
87	eval f_dialog_menu_size height width rows \
88	                        \"\$title\"  \
89	                        \"\$btitle\" \
90	                        \"\$prompt\" \
91	                        \"\$hline\"  \
92	                        $menu_list
93
94	local mtag
95	mtag=$( eval $DIALOG \
96		--title \"\$title\"             \
97		--backtitle \"\$btitle\"        \
98		--hline \"\$hline\"             \
99		--ok-label \"\$msg_ok\"         \
100		--cancel-label \"\$msg_cancel\" \
101		--menu \"\$prompt\"             \
102		$height $width $rows            \
103		$menu_list                      \
104		2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
105	) || return $DIALOG_CANCEL
106	f_dialog_data_sanitize mtag
107
108	case "$mtag" in
109	URL) setvar $VAR_HTTP_PATH "other" ;;
110	*)
111		local value
112		value=$( eval f_dialog_menutag2item \"\$mtag\" $menu_list )
113		setvar $VAR_HTTP_PATH "http://$value"
114	esac
115
116	return $DIALOG_OK
117}
118
119# f_media_set_http
120#
121# Return success if we both found and set the media type to be an HTTP server.
122#
123# Variables from variable.subr that can be used to script user input:
124#
125# 	VAR_HTTP_PATH
126# 		URL containing host and optionally a target path to the release
127# 		repository on the HTTP server. Valid examples include:
128# 			http://myhost
129# 			http://somename:80/pub/
130# 			http://192.168.2.3/pub/
131# 			http://[::1]:8000/
132# 		The default port if not specified is 80.
133# 	VAR_NAMESERVER [Optional]
134# 		If set, overrides resolv.conf(5) and sets the nameserver that
135# 		is used to convert names into addresses (when a name converts
136# 		into multiple addresses, the first address to successfully
137# 		connect is used).
138#
139# Meanwhile, the following variables from variable.subr are set after
140# successful execution:
141#
142# 	VAR_HTTP_HOST
143# 		The HTTP host to connect to, parsed from VAR_HTTP_PATH. In the
144# 		example case of IPv6 where VAR_HTTP_PATH is "http://[::1]" this
145# 		variable will be set to "::1" (the outer brackets are removed).
146# 	VAR_HTTP_PORT
147# 		The TCP port to connect to, parsed from VAR_HTTP_PATH. Usually
148# 		80 unless VAR_HTTP_PATH was one of the following forms:
149# 			http://hostname:OTHER_PORT
150# 			http://hostname:OTHER_PORT/*
151# 			http://ip:OTHER_PORT
152# 			http://ip:OTHER_PORT/*
153# 			http://[ip6]:OTHER_PORT
154# 			http://[ip6]:OTHER_PORT/*
155# 	VAR_HTTP_DIR
156# 		If VAR_HTTP_PATH contained a directory element (e.g.,
157# 		"http://localhost/pub") this variable contains only the
158# 		directory element (e.g., "/pub").
159#
160f_media_set_http()
161{
162	f_media_close
163
164	local url
165	f_getvar $VAR_HTTP_PATH url
166
167	# If we've been through here before ...
168	if f_struct device_network && [ "${url#$msg_other}" ]; then
169		f_dialog_yesno "$msg_reuse_old_http_site_settings" || url=
170	fi
171
172	if [ ! "$url" ]; then
173		f_dialog_menu_media_http || return $FAILURE
174		f_getvar $VAR_HTTP_PATH url
175	fi
176	[ "$url" ] || return $FAILURE
177
178	case "$url" in
179	other)
180		setvar $VAR_HTTP_PATH "http://"
181		f_variable_get_value $VAR_HTTP_PATH \
182			"$msg_please_specify_url_of_freebsd_http_distribution"
183		f_getvar $VAR_HTTP_PATH url
184		if [ ! "${url#http://}" ]; then
185			unset $VAR_HTTP_PATH
186			return $FAILURE
187		fi
188		if [ ${#url} -gt ${URL_MAX:-261261} ]; then
189			f_show_msg "$msg_length_of_specified_url_is_too_long" \
190			           ${#url} ${URL_MAX:-261261}
191			unset $VAR_HTTP_PATH
192			return $FAILURE
193		fi
194		case "$url" in
195		http://*) : valid URL ;;
196		*)
197			f_show_msg "$msg_sorry_invalid_url" "$url"
198			unset $VAR_HTTP_PATH
199			return $FAILURE
200		esac
201	esac
202	case "$url" in
203	http://*) : valid URL ;;
204	*)
205		f_show_msg "$msg_sorry_invalid_url" "$url"
206		unset $VAR_HTTP_PATH
207		return $FAILURE
208	esac
209
210	# Set the name of the HTTP device to the URL
211	f_struct_new DEVICE device_http
212	device_http set name "$url"
213
214	if ! f_struct device_network ||
215	   ! f_dialog_yesno "$msg_youve_already_done_the_network_configuration"
216	then
217		f_struct device_network &&
218			f_device_shutdown device_network
219		if ! f_device_select_tcp; then
220			unset $VAR_HTTP_PATH
221			return $FAILURE
222		fi
223		local dev if
224		f_getvar $VAR_NETWORK_DEVICE if
225		f_device_find -1 "$if" $DEVICE_TYPE_NETWORK dev
226		f_struct_copy "$dev" device_network
227	fi
228	if ! f_device_init device_network; then
229		f_dprintf "f_media_set_http: %s" "$msg_net_device_init_failed"
230		unset $VAR_HTTP_PATH
231		return $FAILURE
232	fi
233
234	local hostname="${url#*://}" port=80 dir=/
235	case "$hostname" in
236	#
237	# The order in-which the below individual cases appear is important!
238	#
239	"["*"]":*/*) # IPv6 address with port and directory
240		f_dprintf "Looks like an IPv6 addr with port/dir: %s" \
241		          "$hostname"
242		hostname="${hostname#\[}"
243		port="${hostname#*\]:}"
244		port="${port%%[!0-9]*}"
245		dir="/${hostname#*/}"
246		hostname="${hostname%%\]:*}"
247		;;
248	"["*"]":*) # IPv6 address with port
249		f_dprintf "Looks like an IPv6 addr with port: %s" "$hostname"
250		hostname="${hostname#\[}"
251		port="${hostname#*\]:}"
252		port="${port%%[!0-9]*}"
253		hostname="${hostname%%\]:*}"
254		;;
255	"["*"]"/*) # IPv6 address with directory
256		f_dprintf "Looks like an IPv6 addr with dir: %s" "$hostname"
257		hostname="${hostname#\[}"
258		dir="/${hostname#*/}"
259		hostname="${hostname%%\]*}"
260		;;
261	"["*"]") # IPv6 address
262		f_dprintf "Looks like an IPv6 addr: %s" "$hostname"
263		hostname="${hostname#\[}"
264		hostname="${hostname%\]}"
265		;;
266	#
267	# ^^^ IPv6 above / DNS Name or IPv4 below vvv
268	#
269	*:*/*) # DNS name or IPv4 address with port and directory
270		f_dprintf "Looks like a %s with port/dir: %s" \
271		          "DNS name or IPv4 addr" "$hostname"
272		port="${hostname#*:}"
273		port="${port%%[!0-9]*}"
274		dir="/${hostname#*/}"
275		hostname="${hostname%%:*}"
276		;;
277	*:*) # DNS name or IPv4 address with port
278		f_dprintf "Looks like a DNS name or IPv4 addr with port: %s" \
279		          "$hostname"
280		port="${hostname#*:}"
281		hostname="${hostname%%:*}"
282		;;
283	*/*) # DNS name or IPv4 address with directory
284		f_dprintf "Looks like a DNS name or IPv4 addr with dir: %s" \
285		          "$hostname"
286		dir="/${hostname#*/}"
287		hostname="${hostname%%/*}"
288		;;
289	*) # DNS name or IPv4 address
290		f_dprintf "Looks like a DNS name or IPv4 addr: %s" "$hostname"
291		: leave hostname as-is
292	esac
293
294	f_dprintf "hostname = \`%s'" "$hostname"
295	f_dprintf "dir = \`%s'" "$dir"
296	f_dprintf "port \# = \`%d'" "$port"
297
298	local ns
299	f_getvar $VAR_NAMESERVER ns
300	[ "$ns" ] || f_resolv_conf_nameservers ns
301	if [ "$ns" -a ! "$HTTP_SKIP_RESOLV" ] && ! {
302		f_validate_ipaddr "$hostname" ||
303		f_validate_ipaddr6 "$hostname"
304	}; then
305		f_show_info "$msg_looking_up_host" "$hostname"
306		f_dprintf "%s: Looking up hostname, %s, using host(1)" \
307		          "f_media_set_http" "$hostname"
308		if ! f_quietly f_host_lookup "$hostname"; then
309			f_show_msg "$msg_cannot_resolve_hostname" "$hostname"
310			f_struct device_network &&
311				f_device_shutdown device_network
312			f_struct_free device_network
313			unset $VAR_HTTP_PATH
314			return $FAILURE
315		fi
316		f_dprintf "Found DNS entry for %s successfully." "$hostname"
317	fi
318
319	setvar $VAR_HTTP_HOST "$hostname"
320	setvar $VAR_HTTP_PORT "$port"
321	setvar $VAR_HTTP_DIR  "$dir"
322
323	device_http set type     $DEVICE_TYPE_HTTP
324	device_http set init     f_media_init_http
325	device_http set get      f_media_get_http
326	device_http set shutdown f_media_shutdown_http
327	device_http set private  device_network
328	f_struct_copy device_http device_media
329	f_struct_free device_http
330
331	return $SUCCESS
332}
333
334# f_http_check_access [$connect_only]
335#
336# Return success if able list a remote HTTP directory. If $connect_only is
337# present and non-null, then returns success if a connection can be made.
338# Variables from variable.subr that can be used to script user input:
339#
340# 	VAR_HTTP_HOST
341# 		The HTTP server host name, IPv4 address or IPv6 address.
342# 		Valid examples include:
343# 			myhost
344# 			192.168.2.3
345# 			::1
346# 	VAR_HTTP_PORT
347# 		The TCP port to connect to when communicating with the server.
348# 	VAR_HTTP_PATH
349# 		The HTTP path sent to the server. Unused if $connect_only is
350# 		present and non-NULL.
351#
352f_http_check_access()
353{
354	local connect_only="$1" hosts=
355
356	local http_host http_port
357	f_getvar $VAR_HTTP_HOST http_host
358	f_getvar $VAR_HTTP_PORT http_port
359
360	if ! {
361		f_validate_ipaddr "$http_host" ||
362		f_validate_ipaddr6 "$http_host" ||
363		{
364		  f_dprintf "%s: Looking up hostname, %s, using host(1)" \
365		            "f_http_check_access" "$http_host"
366		  f_host_lookup "$http_host" hosts
367		}
368	}; then
369		# All the above validations failed
370		[ "$hosts" ] && f_dialog_msgbox "$hosts"
371		unset $VAR_HTTP_HOST
372		return $FAILURE
373	elif [ ! "$hosts" ]; then
374		# One of the first two validations passed
375		hosts="$http_host"
376	fi
377
378	local host connected=
379	for host in $hosts; do
380		f_quietly nc -nz "$host" "$http_port" || continue
381		connected=1; break
382	done
383	if [ ! "$connected" ]; then
384		f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \
385		           "$http_host" "$http_port"
386		unset $VAR_HTTP_HOST
387		return $FAILURE
388	fi
389	[ "$connect_only" ] && return $SUCCESS
390
391	local http_path
392	f_getvar $VAR_HTTP_PATH http_path
393	f_show_info "$msg_checking_access_to" "$http_path"
394
395	local rx
396	case "$http_path" in
397	http://*|/*) : valid request ;;
398	*) http_path="/$http_path" # full URI requests only
399	esac
400	if ! rx=$(
401		printf "GET %s/ HTTP/1.0\r\n\r\n" "${http_path%/}" |
402			nc -n "$host" "$http_port"
403	); then
404		f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \
405		           "$http_host" "$http_port"
406		unset $VAR_HTTP_HOST
407		return $FAILURE
408	fi
409
410	local hdr
411	hdr=$( echo "$rx" | awk '/^\r$/{exit}{print}' )
412
413	local http_found=$FAILURE
414	if echo "$hdr" | awk '
415		BEGIN { found = 0 }
416		/^HTTP.... 200 / {
417			found = 1
418			exit
419		}
420		END { exit ! found }
421	'; then
422		http_found=$SUCCESS
423	fi
424
425	return $http_found
426}
427
428# f_media_init_http $device
429#
430# Initializes the HTTP media device. Returns success if able to confirm the
431# existence of at least one known HTTP server release path directly via HTTP
432# using f_http_check_access(), above.
433#
434# Variables from variable.subr that can be used to script user input:
435#
436# 	VAR_HTTP_HOST
437#		The HTTP server to connect to. Must be set. Also see
438# 		f_http_check_access() for additional variables.
439# 	VAR_RELNAME
440# 		Usually set to `uname -r' but can be overridden.
441# 	VAR_HTTP_PATH
442# 		The HTTP path sent to the server. Usually set by calling
443# 		f_media_set_http().
444#
445# Meanwhile, after successful execution, the following variables (also from
446# variable.subr) are set:
447#
448# 	VAR_HTTP_PATH
449# 		The [possibly] adjusted VAR_HTTP_PATH that was found to contain
450# 		a valid FreeBSD repository.
451#
452f_media_init_http()
453{
454	local dev="$1"
455	f_dprintf "Init routine called for HTTP device. dev=[%s]" "$dev"
456
457	if [ "$HTTP_INITIALIZED" ]; then
458		f_dprintf "HTTP device already initialized."
459		return $SUCCESS
460	fi
461
462	#
463	# First verify access
464	#
465	local connect_only=1
466	f_http_check_access $connect_only
467
468	local http_host
469	f_getvar $VAR_HTTP_HOST http_host
470	while [ ! "$http_host" ]; do
471		f_media_set_http || return $FAILURE
472		f_http_check_access $connect_only
473		f_getvar $VAR_HTTP_HOST http_host
474	done
475
476	local http_path http_found=$FAILURE
477	while :; do
478		#
479		# Now that we've verified that the path we're given is ok,
480		# let's try to be a bit intelligent in locating the release we
481		# are looking for.  First off, if the release is specified as
482		# "__RELEASE" or "any", then just assume that the current
483		# directory is the one we want and give up.
484		#
485		local rel
486		f_getvar $VAR_RELNAME rel
487		f_dprintf "f_media_init_http: rel=[%s]" "$rel"
488
489		case "$rel" in
490		__RELEASE|any)
491			f_getvar $VAR_HTTP_DIR $VAR_HTTP_PATH
492			f_http_check_access
493			http_found=$?
494			;;
495		*)
496			#
497			# Ok, since we have a release variable, let's walk
498			# through the list of directories looking for a release
499			# directory. First successful path wins.
500			#
501			local fdir hp
502			f_getvar $VAR_HTTP_PATH%/ hp
503			setvar $VAR_HTTP_PATH "$hp/$PKG_ABI/latest"
504			if [ "$PKG_ABI" ] && f_http_check_access; then
505				http_found=$SUCCESS
506				setvar $VAR_HTTP_PATH "$hp"
507			else
508				for fdir in $HTTP_DIRS; do
509					setvar $VAR_HTTP_PATH "$hp/$fdir/$rel"
510					if f_http_check_access; then
511						http_found=$SUCCESS
512						break
513					fi
514				done
515			fi
516		esac
517
518		[ $http_found -eq $SUCCESS ] && HTTP_INITIALIZED=YES break
519
520		f_getvar $VAR_HTTP_PATH http_path
521		f_show_msg "$msg_please_check_the_url_and_try_again" \
522		           "$http_path"
523
524		unset HTTP_INITIALIZED $VAR_HTTP_PATH
525		f_media_set_http || break
526	done
527
528	return $http_found
529}
530
531# f_media_get_http $device $file [$probe_type]
532#
533# Returns data from $file on an HTTP server using nc(1). Please note that
534# $device is unused but must be present (even if null). Information is instead
535# gathered from the environment. If $probe_type is both present and non-NULL,
536# this function exits after receiving the HTTP header response from the server
537# (if the HTTP response code is 200, success is returned; otherwise failure).
538# If $probe_type is equal to $PROBE_SIZE, prints the content-length in bytes
539# from the response (or -1 if not found) to standard-out.
540#
541# The variables used to configure the connection are as follows (all of which
542# are configured by f_media_set_http above):
543#
544# 	VAR_HTTP_HOST
545# 		HTTP server which to connect. Can be an IPv4 address, IPv6
546# 		address, or DNS hostname of your choice.
547# 	VAR_HTTP_PORT
548# 		TCP port to connect on; see f_media_set_http above.
549# 	VAR_HTTP_PATH
550# 		Directory prefix to use when requesting $file. Default is `/'
551# 		unless f_media_init_http was able to use f_http_check_access
552# 		to validate one of the defaults in $HTTP_DIRS (see GLOBALS at
553# 		the top of this file); assuming VAR_RELNAME was not set to
554# 		either `__RELEASE' or `any' (indicating that the global set of
555# 		$HTTP_DIRS should be ignored).
556#
557# See variable.subr for additional information.
558#
559# Example usage:
560# 	f_media_set_http
561# 	f_media_get_http media $file
562#
563f_media_get_http()
564{
565	local dev="$1" file="$2" probe_type="$3" hosts=
566	local name
567
568	$dev get name name
569	f_dprintf "f_media_get_http: dev=[%s] file=[%s] probe_type=%s" \
570	          "$name" "$file" "$probe_type"
571
572	local http_host http_port
573	f_getvar $VAR_HTTP_HOST http_host
574	f_getvar $VAR_HTTP_PORT http_port
575
576	if [ ! "$HTTP_INITIALIZED" ]; then
577		f_dprintf "No HTTP connection open, can't get file %s" "$file"
578		return $FAILURE
579	fi
580
581	if ! {
582		f_validate_ipaddr "$http_host" ||
583		f_validate_ipaddr6 "$http_host" ||
584		{
585		  f_dprintf "%s: Looking up hostname, %s, using host(1)" \
586		            "f_media_get_http" "$http_host"
587		  f_host_lookup "$http_host" hosts
588		}
589	}; then
590		# All the above validations failed
591		[ "$hosts" ] && f_dialog_msgbox "$hosts"
592		return $FAILURE
593	elif [ ! "$hosts" ]; then
594		# One of the first two validations passed
595		hosts="$http_host"
596	fi
597
598	local host connected=
599	for host in $hosts; do
600		f_quietly nc -nz "$host" "$http_port" || continue
601		connected=1; break
602	done
603	if [ ! "$connected" ]; then
604		f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \
605		           "$http_host" "$http_port"
606		return $FAILURE
607	fi
608
609	local http_path
610	f_getvar $VAR_HTTP_PATH%/ http_path
611	case "$http_path" in
612	http://*|/*) : valid request ;;
613	*) http_path="/$http_path" # full URI requests only
614	esac
615
616	local url="$http_path/$file" rx
617	f_dprintf "sending http request for: %s" "$url"
618	f_dprintf "using nc to connect to: %s:%s" "$host" "$http_port"
619	printf "GET %s HTTP/1.0\r\n\r\n" "$url" | nc -n "$host" "$http_port" |
620	(
621		#
622		# scan the headers of the response
623		# this is extremely quick'n dirty
624		#
625
626		rv=0 length=-1
627		while read LINE; do
628			case "$LINE" in
629			HTTP*)
630				f_dprintf "received response: %s" "$LINE"
631				set -- $LINE; rv=$2
632				f_isinteger "$rv" || rv=0
633				;;
634			"Content-Length: "*)
635				length="${LINE%
636}"
637				length="${length#Content-Length: }"
638				f_dprintf "received content-length: %s" \
639				          "$length"
640				;;
641			*)
642				[ "${LINE%
643}" ] || break # End of headers
644			esac
645		done
646
647		[ $rv -ge 500 ] && exit 5
648		[ $rv -eq 404 ] && exit 44
649		[ $rv -ge 400 ] && exit 4
650		[ $rv -ge 300 ] && exit 3
651		[ $rv -eq 200 ] || exit $FAILURE
652
653		if [ ! "$probe_type" ]; then
654			cat # output the rest ``as-is''
655		elif [ "$probe_type" = "$PROBE_SIZE" ]; then
656			f_isinteger "$length" || length=-1
657			echo "$length"
658		fi
659		exit 200
660	)
661	local retval=$?
662	[ $retval -eq 200 ] && return $SUCCESS
663	[ "$probe_type" ] && return $FAILURE
664
665	case "$retval" in
666	  5) f_show_msg "$msg_server_error_when_requesting_url" "$url" ;;
667	 44) f_show_msg "$msg_url_was_not_found" "$url" ;;
668	  4) f_show_msg "$msg_client_error" ;;
669	  *) f_show_msg "$msg_error_when_requesting_url" "$url" ;;
670	esac 2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
671	return $FAILURE
672}
673
674# f_media_shutdown_http $device
675#
676# Shuts down the HTTP device. Return status should be ignored. Note that since
677# we don't maintain an open connection to the HTTP server, nothing to do.
678#
679f_media_shutdown_http()
680{
681	[ "$HTTP_INITIALIZED" ] || return $SUCCESS
682
683	unset HTTP_INITIALIZED
684}
685
686############################################################ MAIN
687
688f_dprintf "%s: Successfully loaded." media/http.subr
689
690fi # ! $_MEDIA_HTTP_SUBR
691