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Editing: http.subr
if [ ! "$_MEDIA_HTTP_SUBR" ]; then _MEDIA_HTTP_SUBR=1 # # Copyright (c) 2012-2013 Devin Teske # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # $FreeBSD$ # ############################################################ INCLUDES BSDCFG_SHARE="/usr/share/bsdconfig" . $BSDCFG_SHARE/common.subr || exit 1 f_dprintf "%s: loading includes..." media/http.subr f_include $BSDCFG_SHARE/device.subr f_include $BSDCFG_SHARE/dialog.subr f_include $BSDCFG_SHARE/media/common.subr f_include $BSDCFG_SHARE/media/tcpip.subr f_include $BSDCFG_SHARE/strings.subr f_include $BSDCFG_SHARE/struct.subr f_include $BSDCFG_SHARE/variable.subr BSDCFG_LIBE="/usr/libexec/bsdconfig" f_include_lang $BSDCFG_LIBE/include/messages.subr ############################################################ GLOBALS HTTP_SKIP_RESOLV= URL_MAX=261261 # NOTE: This is according to actual fetch(1) test-results. We actually # use nc(1) to retrieve files, but it's still a good idea to keep the # URLs short enough that fetch(1) won't complain. HTTP_DIRS=" . releases/$UNAME_P snapshots/$UNAME_P pub/FreeBSD pub/FreeBSD/releases/$UNAME_P pub/FreeBSD/snapshots/$UNAME_P pub/FreeBSD-Archive/old-releases/$UNAME_P " # END-QUOTE ############################################################ FUNCTIONS # f_dialog_menu_media_http # # Prompt the user to select from a range of ``built-in'' HTTP servers or # specify their own. If the user makes a choice and doesn't cancel or press # Esc, stores the user's choice in VAR_FTP_PATH (see variable.subr) and returns # success. # f_dialog_menu_media_http() { f_dialog_title "$msg_please_select_a_freebsd_http_distribution_site" local title="$DIALOG_TITLE" btitle="$DIALOG_BACKTITLE" f_dialog_title_restore local prompt="$msg_please_select_the_site_closest_to_you_or_other" local menu_list=" 'dist $msg_main_site' 'ftp.freebsd.org' 'pkg $msg_main_site' 'pkg.freebsd.org' 'URL' '$msg_specify_some_other_http_site' " # END-QUOTE local hline="$msg_select_a_site_thats_close" local height width rows eval f_dialog_menu_size height width rows \ \"\$title\" \ \"\$btitle\" \ \"\$prompt\" \ \"\$hline\" \ $menu_list local mtag mtag=$( eval $DIALOG \ --title \"\$title\" \ --backtitle \"\$btitle\" \ --hline \"\$hline\" \ --ok-label \"\$msg_ok\" \ --cancel-label \"\$msg_cancel\" \ --menu \"\$prompt\" \ $height $width $rows \ $menu_list \ 2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD ) || return $DIALOG_CANCEL f_dialog_data_sanitize mtag case "$mtag" in URL) setvar $VAR_HTTP_PATH "other" ;; *) local value value=$( eval f_dialog_menutag2item \"\$mtag\" $menu_list ) setvar $VAR_HTTP_PATH "http://$value" esac return $DIALOG_OK } # f_media_set_http # # Return success if we both found and set the media type to be an HTTP server. # # Variables from variable.subr that can be used to script user input: # # VAR_HTTP_PATH # URL containing host and optionally a target path to the release # repository on the HTTP server. Valid examples include: # http://myhost # http://somename:80/pub/ # http://192.168.2.3/pub/ # http://[::1]:8000/ # The default port if not specified is 80. # VAR_NAMESERVER [Optional] # If set, overrides resolv.conf(5) and sets the nameserver that # is used to convert names into addresses (when a name converts # into multiple addresses, the first address to successfully # connect is used). # # Meanwhile, the following variables from variable.subr are set after # successful execution: # # VAR_HTTP_HOST # The HTTP host to connect to, parsed from VAR_HTTP_PATH. In the # example case of IPv6 where VAR_HTTP_PATH is "http://[::1]" this # variable will be set to "::1" (the outer brackets are removed). # VAR_HTTP_PORT # The TCP port to connect to, parsed from VAR_HTTP_PATH. Usually # 80 unless VAR_HTTP_PATH was one of the following forms: # http://hostname:OTHER_PORT # http://hostname:OTHER_PORT/* # http://ip:OTHER_PORT # http://ip:OTHER_PORT/* # http://[ip6]:OTHER_PORT # http://[ip6]:OTHER_PORT/* # VAR_HTTP_DIR # If VAR_HTTP_PATH contained a directory element (e.g., # "http://localhost/pub") this variable contains only the # directory element (e.g., "/pub"). # f_media_set_http() { f_media_close local url f_getvar $VAR_HTTP_PATH url # If we've been through here before ... if f_struct device_network && [ "${url#$msg_other}" ]; then f_dialog_yesno "$msg_reuse_old_http_site_settings" || url= fi if [ ! "$url" ]; then f_dialog_menu_media_http || return $FAILURE f_getvar $VAR_HTTP_PATH url fi [ "$url" ] || return $FAILURE case "$url" in other) setvar $VAR_HTTP_PATH "http://" f_variable_get_value $VAR_HTTP_PATH \ "$msg_please_specify_url_of_freebsd_http_distribution" f_getvar $VAR_HTTP_PATH url if [ ! "${url#http://}" ]; then unset $VAR_HTTP_PATH return $FAILURE fi if [ ${#url} -gt ${URL_MAX:-261261} ]; then f_show_msg "$msg_length_of_specified_url_is_too_long" \ ${#url} ${URL_MAX:-261261} unset $VAR_HTTP_PATH return $FAILURE fi case "$url" in http://*) : valid URL ;; *) f_show_msg "$msg_sorry_invalid_url" "$url" unset $VAR_HTTP_PATH return $FAILURE esac esac case "$url" in http://*) : valid URL ;; *) f_show_msg "$msg_sorry_invalid_url" "$url" unset $VAR_HTTP_PATH return $FAILURE esac # Set the name of the HTTP device to the URL f_struct_new DEVICE device_http device_http set name "$url" if ! f_struct device_network || ! f_dialog_yesno "$msg_youve_already_done_the_network_configuration" then f_struct device_network && f_device_shutdown device_network if ! f_device_select_tcp; then unset $VAR_HTTP_PATH return $FAILURE fi local dev if f_getvar $VAR_NETWORK_DEVICE if f_device_find -1 "$if" $DEVICE_TYPE_NETWORK dev f_struct_copy "$dev" device_network fi if ! f_device_init device_network; then f_dprintf "f_media_set_http: %s" "$msg_net_device_init_failed" unset $VAR_HTTP_PATH return $FAILURE fi local hostname="${url#*://}" port=80 dir=/ case "$hostname" in # # The order in-which the below individual cases appear is important! # "["*"]":*/*) # IPv6 address with port and directory f_dprintf "Looks like an IPv6 addr with port/dir: %s" \ "$hostname" hostname="${hostname#\[}" port="${hostname#*\]:}" port="${port%%[!0-9]*}" dir="/${hostname#*/}" hostname="${hostname%%\]:*}" ;; "["*"]":*) # IPv6 address with port f_dprintf "Looks like an IPv6 addr with port: %s" "$hostname" hostname="${hostname#\[}" port="${hostname#*\]:}" port="${port%%[!0-9]*}" hostname="${hostname%%\]:*}" ;; "["*"]"/*) # IPv6 address with directory f_dprintf "Looks like an IPv6 addr with dir: %s" "$hostname" hostname="${hostname#\[}" dir="/${hostname#*/}" hostname="${hostname%%\]*}" ;; "["*"]") # IPv6 address f_dprintf "Looks like an IPv6 addr: %s" "$hostname" hostname="${hostname#\[}" hostname="${hostname%\]}" ;; # # ^^^ IPv6 above / DNS Name or IPv4 below vvv # *:*/*) # DNS name or IPv4 address with port and directory f_dprintf "Looks like a %s with port/dir: %s" \ "DNS name or IPv4 addr" "$hostname" port="${hostname#*:}" port="${port%%[!0-9]*}" dir="/${hostname#*/}" hostname="${hostname%%:*}" ;; *:*) # DNS name or IPv4 address with port f_dprintf "Looks like a DNS name or IPv4 addr with port: %s" \ "$hostname" port="${hostname#*:}" hostname="${hostname%%:*}" ;; */*) # DNS name or IPv4 address with directory f_dprintf "Looks like a DNS name or IPv4 addr with dir: %s" \ "$hostname" dir="/${hostname#*/}" hostname="${hostname%%/*}" ;; *) # DNS name or IPv4 address f_dprintf "Looks like a DNS name or IPv4 addr: %s" "$hostname" : leave hostname as-is esac f_dprintf "hostname = \`%s'" "$hostname" f_dprintf "dir = \`%s'" "$dir" f_dprintf "port \# = \`%d'" "$port" local ns f_getvar $VAR_NAMESERVER ns [ "$ns" ] || f_resolv_conf_nameservers ns if [ "$ns" -a ! "$HTTP_SKIP_RESOLV" ] && ! { f_validate_ipaddr "$hostname" || f_validate_ipaddr6 "$hostname" }; then f_show_info "$msg_looking_up_host" "$hostname" f_dprintf "%s: Looking up hostname, %s, using host(1)" \ "f_media_set_http" "$hostname" if ! f_quietly f_host_lookup "$hostname"; then f_show_msg "$msg_cannot_resolve_hostname" "$hostname" f_struct device_network && f_device_shutdown device_network f_struct_free device_network unset $VAR_HTTP_PATH return $FAILURE fi f_dprintf "Found DNS entry for %s successfully." "$hostname" fi setvar $VAR_HTTP_HOST "$hostname" setvar $VAR_HTTP_PORT "$port" setvar $VAR_HTTP_DIR "$dir" device_http set type $DEVICE_TYPE_HTTP device_http set init f_media_init_http device_http set get f_media_get_http device_http set shutdown f_media_shutdown_http device_http set private device_network f_struct_copy device_http device_media f_struct_free device_http return $SUCCESS } # f_http_check_access [$connect_only] # # Return success if able list a remote HTTP directory. If $connect_only is # present and non-null, then returns success if a connection can be made. # Variables from variable.subr that can be used to script user input: # # VAR_HTTP_HOST # The HTTP server host name, IPv4 address or IPv6 address. # Valid examples include: # myhost # 192.168.2.3 # ::1 # VAR_HTTP_PORT # The TCP port to connect to when communicating with the server. # VAR_HTTP_PATH # The HTTP path sent to the server. Unused if $connect_only is # present and non-NULL. # f_http_check_access() { local connect_only="$1" hosts= local http_host http_port f_getvar $VAR_HTTP_HOST http_host f_getvar $VAR_HTTP_PORT http_port if ! { f_validate_ipaddr "$http_host" || f_validate_ipaddr6 "$http_host" || { f_dprintf "%s: Looking up hostname, %s, using host(1)" \ "f_http_check_access" "$http_host" f_host_lookup "$http_host" hosts } }; then # All the above validations failed [ "$hosts" ] && f_dialog_msgbox "$hosts" unset $VAR_HTTP_HOST return $FAILURE elif [ ! "$hosts" ]; then # One of the first two validations passed hosts="$http_host" fi local host connected= for host in $hosts; do f_quietly nc -nz "$host" "$http_port" || continue connected=1; break done if [ ! "$connected" ]; then f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \ "$http_host" "$http_port" unset $VAR_HTTP_HOST return $FAILURE fi [ "$connect_only" ] && return $SUCCESS local http_path f_getvar $VAR_HTTP_PATH http_path f_show_info "$msg_checking_access_to" "$http_path" local rx case "$http_path" in http://*|/*) : valid request ;; *) http_path="/$http_path" # full URI requests only esac if ! rx=$( printf "GET %s/ HTTP/1.0\r\n\r\n" "${http_path%/}" | nc -n "$host" "$http_port" ); then f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \ "$http_host" "$http_port" unset $VAR_HTTP_HOST return $FAILURE fi local hdr hdr=$( echo "$rx" | awk '/^\r$/{exit}{print}' ) local http_found=$FAILURE if echo "$hdr" | awk ' BEGIN { found = 0 } /^HTTP.... 200 / { found = 1 exit } END { exit ! found } '; then http_found=$SUCCESS fi return $http_found } # f_media_init_http $device # # Initializes the HTTP media device. Returns success if able to confirm the # existence of at least one known HTTP server release path directly via HTTP # using f_http_check_access(), above. # # Variables from variable.subr that can be used to script user input: # # VAR_HTTP_HOST # The HTTP server to connect to. Must be set. Also see # f_http_check_access() for additional variables. # VAR_RELNAME # Usually set to `uname -r' but can be overridden. # VAR_HTTP_PATH # The HTTP path sent to the server. Usually set by calling # f_media_set_http(). # # Meanwhile, after successful execution, the following variables (also from # variable.subr) are set: # # VAR_HTTP_PATH # The [possibly] adjusted VAR_HTTP_PATH that was found to contain # a valid FreeBSD repository. # f_media_init_http() { local dev="$1" f_dprintf "Init routine called for HTTP device. dev=[%s]" "$dev" if [ "$HTTP_INITIALIZED" ]; then f_dprintf "HTTP device already initialized." return $SUCCESS fi # # First verify access # local connect_only=1 f_http_check_access $connect_only local http_host f_getvar $VAR_HTTP_HOST http_host while [ ! "$http_host" ]; do f_media_set_http || return $FAILURE f_http_check_access $connect_only f_getvar $VAR_HTTP_HOST http_host done local http_path http_found=$FAILURE while :; do # # Now that we've verified that the path we're given is ok, # let's try to be a bit intelligent in locating the release we # are looking for. First off, if the release is specified as # "__RELEASE" or "any", then just assume that the current # directory is the one we want and give up. # local rel f_getvar $VAR_RELNAME rel f_dprintf "f_media_init_http: rel=[%s]" "$rel" case "$rel" in __RELEASE|any) f_getvar $VAR_HTTP_DIR $VAR_HTTP_PATH f_http_check_access http_found=$? ;; *) # # Ok, since we have a release variable, let's walk # through the list of directories looking for a release # directory. First successful path wins. # local fdir hp f_getvar $VAR_HTTP_PATH%/ hp setvar $VAR_HTTP_PATH "$hp/$PKG_ABI/latest" if [ "$PKG_ABI" ] && f_http_check_access; then http_found=$SUCCESS setvar $VAR_HTTP_PATH "$hp" else for fdir in $HTTP_DIRS; do setvar $VAR_HTTP_PATH "$hp/$fdir/$rel" if f_http_check_access; then http_found=$SUCCESS break fi done fi esac [ $http_found -eq $SUCCESS ] && HTTP_INITIALIZED=YES break f_getvar $VAR_HTTP_PATH http_path f_show_msg "$msg_please_check_the_url_and_try_again" \ "$http_path" unset HTTP_INITIALIZED $VAR_HTTP_PATH f_media_set_http || break done return $http_found } # f_media_get_http $device $file [$probe_type] # # Returns data from $file on an HTTP server using nc(1). Please note that # $device is unused but must be present (even if null). Information is instead # gathered from the environment. If $probe_type is both present and non-NULL, # this function exits after receiving the HTTP header response from the server # (if the HTTP response code is 200, success is returned; otherwise failure). # If $probe_type is equal to $PROBE_SIZE, prints the content-length in bytes # from the response (or -1 if not found) to standard-out. # # The variables used to configure the connection are as follows (all of which # are configured by f_media_set_http above): # # VAR_HTTP_HOST # HTTP server which to connect. Can be an IPv4 address, IPv6 # address, or DNS hostname of your choice. # VAR_HTTP_PORT # TCP port to connect on; see f_media_set_http above. # VAR_HTTP_PATH # Directory prefix to use when requesting $file. Default is `/' # unless f_media_init_http was able to use f_http_check_access # to validate one of the defaults in $HTTP_DIRS (see GLOBALS at # the top of this file); assuming VAR_RELNAME was not set to # either `__RELEASE' or `any' (indicating that the global set of # $HTTP_DIRS should be ignored). # # See variable.subr for additional information. # # Example usage: # f_media_set_http # f_media_get_http media $file # f_media_get_http() { local dev="$1" file="$2" probe_type="$3" hosts= local name $dev get name name f_dprintf "f_media_get_http: dev=[%s] file=[%s] probe_type=%s" \ "$name" "$file" "$probe_type" local http_host http_port f_getvar $VAR_HTTP_HOST http_host f_getvar $VAR_HTTP_PORT http_port if [ ! "$HTTP_INITIALIZED" ]; then f_dprintf "No HTTP connection open, can't get file %s" "$file" return $FAILURE fi if ! { f_validate_ipaddr "$http_host" || f_validate_ipaddr6 "$http_host" || { f_dprintf "%s: Looking up hostname, %s, using host(1)" \ "f_media_get_http" "$http_host" f_host_lookup "$http_host" hosts } }; then # All the above validations failed [ "$hosts" ] && f_dialog_msgbox "$hosts" return $FAILURE elif [ ! "$hosts" ]; then # One of the first two validations passed hosts="$http_host" fi local host connected= for host in $hosts; do f_quietly nc -nz "$host" "$http_port" || continue connected=1; break done if [ ! "$connected" ]; then f_show_msg "$msg_couldnt_connect_to_server http://%s:%s/" \ "$http_host" "$http_port" return $FAILURE fi local http_path f_getvar $VAR_HTTP_PATH%/ http_path case "$http_path" in http://*|/*) : valid request ;; *) http_path="/$http_path" # full URI requests only esac local url="$http_path/$file" rx f_dprintf "sending http request for: %s" "$url" f_dprintf "using nc to connect to: %s:%s" "$host" "$http_port" printf "GET %s HTTP/1.0\r\n\r\n" "$url" | nc -n "$host" "$http_port" | ( # # scan the headers of the response # this is extremely quick'n dirty # rv=0 length=-1 while read LINE; do case "$LINE" in HTTP*) f_dprintf "received response: %s" "$LINE" set -- $LINE; rv=$2 f_isinteger "$rv" || rv=0 ;; "Content-Length: "*) length="${LINE% }" length="${length#Content-Length: }" f_dprintf "received content-length: %s" \ "$length" ;; *) [ "${LINE% }" ] || break # End of headers esac done [ $rv -ge 500 ] && exit 5 [ $rv -eq 404 ] && exit 44 [ $rv -ge 400 ] && exit 4 [ $rv -ge 300 ] && exit 3 [ $rv -eq 200 ] || exit $FAILURE if [ ! "$probe_type" ]; then cat # output the rest ``as-is'' elif [ "$probe_type" = "$PROBE_SIZE" ]; then f_isinteger "$length" || length=-1 echo "$length" fi exit 200 ) local retval=$? [ $retval -eq 200 ] && return $SUCCESS [ "$probe_type" ] && return $FAILURE case "$retval" in 5) f_show_msg "$msg_server_error_when_requesting_url" "$url" ;; 44) f_show_msg "$msg_url_was_not_found" "$url" ;; 4) f_show_msg "$msg_client_error" ;; *) f_show_msg "$msg_error_when_requesting_url" "$url" ;; esac 2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD return $FAILURE } # f_media_shutdown_http $device # # Shuts down the HTTP device. Return status should be ignored. Note that since # we don't maintain an open connection to the HTTP server, nothing to do. # f_media_shutdown_http() { [ "$HTTP_INITIALIZED" ] || return $SUCCESS unset HTTP_INITIALIZED } ############################################################ MAIN f_dprintf "%s: Successfully loaded." media/http.subr fi # ! $_MEDIA_HTTP_SUBR
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