/usr/share/tcltk/tcllib1.19/uri/uri.tcl is in tcllib 1.19-dfsg-2.
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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 | # uri.tcl --
#
# URI parsing and fetch
#
# Copyright (c) 2000 Zveno Pty Ltd
# Copyright (c) 2006 Pierre DAVID <Pierre.David@crc.u-strasbg.fr>
# Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>
# Copyright (c) 2017 Keith Nash <kjnash@users.sourceforge.net>
# Steve Ball, http://www.zveno.com/
# Derived from urls.tcl by Andreas Kupries
#
# CVS: $Id: uri.tcl,v 1.36 2011/03/23 04:39:54 andreas_kupries Exp $
package require Tcl 8.2
namespace eval ::uri {
namespace export split join
namespace export resolve isrelative
namespace export geturl
namespace export canonicalize
namespace export register
namespace export setQuirkOption
variable file:counter 0
variable Quirks
set Quirks(NoInitialSlash) 1
set Quirks(NoExtraKeys) 0
set Quirks(HostAsDriveLetter) 0
set Quirks(RemoveDoubleSlashes) 1
# Defaults for v1.2.7: {1 0 0 1}
# --------------------------------------------------------------------------
# These variables are used by uri::register and are a repository of
# scheme-related pattern information that may be accessed by external code.
# None is used by the other commands of this package.
# --------------------------------------------------------------------------
variable schemes {}
variable schemePattern ""
variable url ""
variable url2part
array set url2part {}
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# basic regular expressions used in URL syntax.
namespace eval basic {
# ----------------------------------------------------------------------
# These variables are used to construct the variables used by commands.
# ----------------------------------------------------------------------
variable digit {[0-9]}
variable hex {[0-9A-Fa-f]}
variable alphaDigit {[A-Za-z0-9]}
variable alphaDigitMinus {[A-Za-z0-9-]}
variable escape "%${hex}${hex}"
variable digits "${digit}+"
variable toplabel \
"(${alphaDigit}${alphaDigitMinus}*${alphaDigit}\\.?|${alphaDigit}\\.?)"
variable domainlabel \
"(${alphaDigit}${alphaDigitMinus}*${alphaDigit}|${alphaDigit})"
variable hostname \
"((${domainlabel}\\.)*${toplabel})"
variable hostnumber4 \
"(?:${digits}\\.${digits}\\.${digits}\\.${digits})"
variable hostnumber6 {(?:\[[^]]*\])}
variable hostnumber "(${hostnumber4}|${hostnumber6})"
variable usrCharN {[a-zA-Z0-9$_.+!*'(,);?&=-]}
variable usrChar "(${usrCharN}|${escape})"
# ----------------------------------------------------------------------
# >>> THESE VARIABLES ARE THE ONLY ONES USED BY COMMANDS <<<
# ----------------------------------------------------------------------
variable hostspec "${hostname}|${hostnumber}"
variable port "${digit}*"
variable user "${usrChar}*"
variable password $user
# ----------------------------------------------------------------------
# This variable (and escape, hostname, hostnumber, port, user, password
# from above) are used to construct the variables in the block below.
# ----------------------------------------------------------------------
variable xCharN {[a-zA-Z0-9$_.+!*'(,);/?:@&=-]}
# ----------------------------------------------------------------------
# These variables (and "escape") are used in the patterns defined in the
# calls to uri::register at the end of the file. They are not used by
# any commands.
# ----------------------------------------------------------------------
variable xChar "(${xCharN}|${escape})"
variable host "(${hostname}|${hostnumber})"
variable hostOrPort "${host}(:${port})?"
variable login "(${user}(:${password})?@)?${hostOrPort}"
variable alpha {[a-zA-Z]}
# ----------------------------------------------------------------------
# These variables are not used by anything in this file.
# ----------------------------------------------------------------------
variable loAlpha {[a-z]}
variable hiAlpha {[A-Z]}
variable safe {[$_.+-]}
variable extra {[!*'(,)]}
# danger in next pattern, order important for []
variable national {[][|\}\{\^~`]}
variable punctuation {[<>#%"]} ;#" fake emacs hilit
variable reserved {[;/?:@&=]}
# next is <national | punctuation>
variable unsafe {[][<>"#%\{\}|\\^~`]} ;#" emacs hilit
# unreserved = alpha | digit | safe | extra
# xchar = unreserved | reserved | escape
variable unreserved {[a-zA-Z0-9$_.+!*'(,)-]}
variable uChar "(${unreserved}|${escape})"
} ;# basic {}
}
# ::uri::setQuirkOption
#
# Accessor command for quirk options; uses "set" semantics.
#
# Quirk options allow deviations from RFC 3986, and are fully documented
# in the man page uri(n).
#
# Currently defined quirk options are:
# NoInitialSlash
# NoExtraKeys
# RemoveDoubleSlashes
# HostAsDriveLetter
#
# Arguments:
# key name of a quirk option
# value (optional, boolean) new value
#
# Results:
# The value of the quirk option.
proc ::uri::setQuirkOption {key args} {
variable Quirks
if {![info exists Quirks($key)]} {
return -code error {unknown key}
}
set lenny [llength $args]
if {$lenny == 0} {
return $Quirks($key)
} elseif {$lenny == 1} {
set value [lindex $args 0]
if {![string is boolean -strict $value]} {
return -code error {boolean value required}
}
set Quirks($key) [expr {$value && $value}]
return $value
} else {
return -code error {wrong # args: should be "::uri::setQuirkOption\
key ?newBooleanValue?"}
}
}
# ::uri::register --
#
# Register a scheme (and aliases) in the package. The command
# creates a namespace below "::uri" with the same name as the
# scheme and executes the script declaring the pattern variables
# for this scheme in the new namespace. At last it updates the
# uri variables keeping track of overall scheme information.
#
# The script has to declare at least the variable "schemepart",
# the pattern for an url of the registered scheme after the
# scheme declaration. Not declaring this variable is an error.
#
# Registration provides a number of pattern variables for use by external
# code. It is unconnected to the commands provided by the uri package.
# See the warnings near the end of this file where uri::register is
# called.
#
# Arguments:
# schemeList Name of the scheme to register, plus aliases
# script Script declaring the scheme patterns
#
# Results:
# None.
proc ::uri::register {schemeList script} {
variable schemes
variable schemePattern
variable url
variable url2part
# Check scheme and its aliases for existence.
foreach scheme $schemeList {
if {[lsearch -exact $schemes $scheme] >= 0} {
return -code error \
"trying to register scheme (\"$scheme\") which is already known"
}
}
# Get the main scheme
set scheme [lindex $schemeList 0]
if {[catch {namespace eval $scheme $script} msg]} {
catch {namespace delete $scheme}
return -code error \
"error while evaluating scheme script: $msg"
}
if {![info exists ${scheme}::schemepart]} {
namespace delete $scheme
return -code error \
"Variable \"schemepart\" is missing."
}
# Now we can extend the variables which keep track of the registered schemes.
eval [linsert $schemeList 0 lappend schemes]
set schemePattern "([::join $schemes |]):"
foreach s $schemeList {
# FRINK: nocheck
set url2part($s) "${s}:[set ${scheme}::schemepart]"
# FRINK: nocheck
append url "(${s}:[set ${scheme}::schemepart])|"
}
set url [string trimright $url |]
return
}
# ::uri::split --
#
# Splits the given <a url> into its constituents.
#
# Arguments:
# url the URL to split
#
# Results:
# Tcl list containing constituents, suitable for 'array set'.
proc ::uri::split {url {defaultscheme http}} {
set url [string trim $url]
set scheme {}
# RFC 3986 Sec 3.1: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
regexp -- {^([A-Za-z][A-Za-z0-9+.-]*):} $url dummy scheme
if {$scheme == {}} {
set scheme $defaultscheme
switch -- $scheme {
http - https - ftp {
# x/y -> //x/y PREPEND //
# /x/y -> ///x/y PREPEND //
# //x/y -> //x/y
# ///x/y -> ///x/y
# ////x/y -> ////x/y
if {[string range $url 0 1] != "//"} {
set url //$url
}
}
}
}
# ease maintenance: dynamic dispatch, able to handle all schemes
# added in future!
if {[::info procs Split[string totitle $scheme]] == {}} {
error "unknown scheme '$scheme' in '$url'"
}
regsub -- "^${scheme}:" $url {} url
# Pass url without scheme: to the per-scheme handler.
set parts(scheme) [string tolower $scheme]
array set parts [Split[string totitle $scheme] $url]
# Does not decode encoded characters.
return [array get parts]
}
proc ::uri::SplitFtp {url} {
# @c Splits the given ftp-<a url> into its constituents.
# @a url: The url to split, without! scheme specification.
# @r List containing the constituents, suitable for 'array set'.
# general syntax:
# //<user>:<password>@<host>:<port>/<cwd1>/.../<cwdN>/<name>;type=<typecode>
#
# additional rules:
#
# <user>:<password> are optional, detectable by presence of @.
# <password> is optional too.
#
# "//" [ <user> [":" <password> ] "@"] <host> [":" <port>] "/"
# <cwd1> "/" ..."/" <cwdN> "/" <name> [";type=" <typecode>]
upvar \#0 [namespace current]::ftp::typepart ftptype
array set parts {user {} pwd {} host {} port {} path {} type {} scheme ftp}
# slash off possible type specification
if {[regexp -indices -- "${ftptype}$" $url dummy ftype]} {
set from [lindex $ftype 0]
set to [lindex $ftype 1]
set parts(type) [string range $url $from $to]
set from [lindex $dummy 0]
set url [string replace $url $from end]
}
# Handle user, password, host and port
if {[string match "//*" $url]} {
set url [string range $url 2 end]
array set parts [GetUPHP url]
# (also removes UPHP from url)
}
set parts(path) $url
AddQuirk3986 parts
return [array get parts]
}
proc ::uri::JoinFtp args {
set uphp [eval [linsert $args 0 ComposeUPHP {}]]
array set components {
pbare 0 path {} type {}
}
array set components $args
set type {}
if {[string length $components(type)]} {
set type \;type=$components(type)
}
RemoveQuirk3986 components
# Botches to accept certain invalid arguments instead of raising an error.
set PathFirst [string index $components(path) 0]
if {($PathFirst != {}) && ($PathFirst != {/})} {
# The path is invalid: if it is not empty it must begin with "/".
# This botch allows the command nevertheless to return a valid URI.
set components(path) "/$components(path)"
}
if {($components(path) == {}) && ($components(type) != "")} {
set components(path) "/"
# FTP requires a non-empty path if $type is non-empty.
# RFC 1738 Sec. 5,
# This botch enforces that.
}
return ftp://${uphp}$components(path)$type
}
proc ::uri::SplitHttps {url} {
return [SplitHttpInner https $url]
}
proc ::uri::SplitHttp {url} {
return [SplitHttpInner http $url]
}
proc ::uri::SplitHttpInner {scheme url} {
# @c Splits the given http-<a url> into its constituents.
# @a url: The url to split, without! scheme specification.
# @r List containing the constituents, suitable for 'array set'.
# general syntax:
# //<host>:<port>/<path>?<searchpart>
#
# where <host> and <port> are as described in Section 3.1. If :<port>
# is omitted, the port defaults to 80. No user name or password is
# allowed. <path> is an HTTP selector, and <searchpart> is a query
# string. The <path> is optional, as is the <searchpart> and its
# preceding "?". If neither <path> nor <searchpart> is present, the "/"
# may also be omitted.
#
# Within the <path> and <searchpart> components, "/", ";", "?" are
# reserved. The "/" character may be used within HTTP to designate a
# hierarchical structure.
#
# path == <cwd1> "/" ..."/" <cwdN> "/" <name> ["#" <fragment>]
array set parts {host {} port {} path {} query {} fragment {}}
array set parts [list scheme $scheme]
set fragmentPattern "#(.*)\$"
# slash off possible fragment.
# NOTE: This must be done before the query, because a fragment can
# follow a query, and slashing off the query first will take the
# fragment with it. Bug #3235340.
if {[regexp -indices -- $fragmentPattern $url match fragment]} {
set from [lindex $fragment 0]
set to [lindex $fragment 1]
set parts(fragment) [string range $url $from $to]
set url [string replace $url [lindex $match 0] end]
}
# slash off possible query. the 'search' regexp, while official,
# is not good enough. We have apparently lots of urls in the wild
# which contain unquoted urls with queries in a query. The RE
# finds the embedded query, not the actual one. Using string first
# now instead of a RE
if {[set pos [string first ? $url]] >= 0} {
incr pos
set parts(query) [string range $url $pos end]
incr pos -1
set url [string replace $url $pos end]
}
if {[string match "//*" $url]} {
set url [string range $url 2 end]
array set parts [GetUPHP url]
# (also removes UPHP from url)
}
set parts(path) $url
AddQuirk3986 parts
return [array get parts]
}
proc ::uri::JoinHttp {args} {
return [eval [linsert $args 0 ::uri::JoinHttpInner http 80]]
}
proc ::uri::JoinHttps {args} {
return [eval [linsert $args 0 ::uri::JoinHttpInner https 443]]
}
proc ::uri::JoinHttpInner {scheme defport args} {
set uphp [eval [linsert $args 0 ComposeUPHP $defport]]
array set components {pbare 0 path {} query {} fragment {}}
array set components $args
set query {}
if {[string length $components(query)]} {
set query ?$components(query)
}
if { $components(fragment) != "" } {
set components(fragment) "#$components(fragment)"
} else {
set components(fragment) ""
}
RemoveQuirk3986 components
# Botch to accept certain invalid arguments instead of raising an error.
set PathFirst [string index $components(path) 0]
if {($PathFirst != {}) && ($PathFirst != {/})} {
# The path is invalid: if it is not empty it must begin with "/".
# This botch allows the command nevertheless to return a valid URI.
set components(path) "/$components(path)"
}
return $scheme://$uphp$components(path)$query$components(fragment)
}
proc ::uri::SplitFile {url} {
# @c Splits the given file-<a url> into its constituents.
# @a url: The url to split, without! scheme specification.
# @r List containing the constituents, suitable for 'array set'.
variable Quirks
upvar #0 [namespace current]::basic::hostspec hostspec
if {[string match "//*" $url]} {
set url [string range $url 2 end]
set hostPattern "^($hostspec)"
if { $Quirks(HostAsDriveLetter)
&& ($::tcl_platform(platform) == "windows")
} {
# Catch drive letter
append hostPattern :?
} else {
# Proceed as usual
}
if {[regexp -indices -- $hostPattern $url match host]} {
set fh [lindex $host 0]
set th [lindex $host 1]
set parts(host) [string range $url $fh $th]
set matchEnd [lindex $match 1]
incr matchEnd
set url [string range $url $matchEnd end]
}
}
# This always begins with "/" if $url is a valid absolute file:// URL.
set parts(path) $url
return [array get parts]
}
proc ::uri::JoinFile args {
variable Quirks
array set components {
host {} port {} path {}
}
array set components $args
if { $Quirks(HostAsDriveLetter)
&& ($::tcl_platform(platform) == "windows")
} {
# This misfeature is kept for compatibility with legacy code.
if {[string length $components(host)]} {
return file://$components(host):$components(path)
} else {
return file://$components(path)
}
} else {
# Botch to accept certain invalid arguments instead of raising an error.
if {[string index $components(path) 0] != "/"} {
# The path argument is invalid: it must begin with "/" (an empty
# path is not allowed for the scheme "file", RFC 1738 Sec. 5).
# This botch allows the command nevertheless to return a valid URI.
set components(path) "/$components(path)"
} else {
}
return file://$components(host)$components(path)
}
}
proc ::uri::SplitMailto {url} {
# @c Splits the given mailto-<a url> into its constituents.
# @a url: The url to split, without! scheme specification.
# @r List containing the constituents, suitable for 'array set'.
if {[string match "*@*" $url]} {
set url [::split $url @]
return [list user [lindex $url 0] host [lindex $url 1]]
} else {
return [list user $url]
}
}
proc ::uri::JoinMailto args {
array set components {
user {} host {}
}
array set components $args
return mailto:$components(user)@$components(host)
}
proc ::uri::SplitNews {url} {
if { [string first @ $url] >= 0 } {
return [list message-id $url]
} else {
return [list newsgroup-name $url]
}
}
proc ::uri::JoinNews args {
array set components {
message-id {} newsgroup-name {}
}
array set components $args
return news:$components(message-id)$components(newsgroup-name)
}
proc ::uri::SplitLdaps {url} {
::uri::SplitLdap $url
}
proc ::uri::SplitLdap {url} {
# @c Splits the given Ldap-<a url> into its constituents.
# @a url: The url to split, without! scheme specification.
# @r List containing the constituents, suitable for 'array set'.
# general syntax:
# //<host>:<port>/<dn>?<attrs>?<scope>?<filter>?<extensions>
#
# where <host> and <port> are as described in Section 5 of RFC 1738.
# No user name or password is allowed.
# If omitted, the port defaults to 389 for ldap, 636 for ldaps
# <dn> is the base DN for the search
# <attrs> is a comma separated list of attributes description
# <scope> is either "base", "one" or "sub".
# <filter> is a RFC 2254 filter specification
# <extensions> are documented in RFC 2255
#
array set parts {host {} port {} dn {} attrs {} scope {} filter {} extensions {}}
# host port dn attrs scope filter extns
set re {//((?:[^:?/]+)|(?:\[[^\]]*\]))(?::([0-9]+))?(?:/([^?]+)(?:\?([^?]*)(?:\?(base|one|sub)?(?:\?([^?]*)(?:\?(.*))?)?)?)?)?}
if {! [regexp $re $url match parts(host) parts(port) \
parts(dn) parts(attrs) parts(scope) parts(filter) \
parts(extensions)]} then {
return -code error "unable to match URL \"$url\""
}
set parts(attrs) [::split $parts(attrs) ","]
return [array get parts]
}
proc ::uri::JoinLdap {args} {
return [eval [linsert $args 0 ::uri::JoinLdapInner ldap 389]]
}
proc ::uri::JoinLdaps {args} {
return [eval [linsert $args 0 ::uri::JoinLdapInner ldaps 636]]
}
proc ::uri::JoinLdapInner {scheme defport args} {
array set components {host {} port {} dn {} attrs {} scope {} filter {} extensions {}}
set components(port) $defport
array set components $args
set port {}
if {[string length $components(port)] && $components(port) != $defport} {
set port :$components(port)
}
set url "$scheme://$components(host)$port"
set components(attrs) [::join $components(attrs) ","]
set s ""
foreach c {dn attrs scope filter extensions} {
if {[string equal $c "dn"]} then {
append s "/"
} else {
append s "?"
}
if {! [string equal $components($c) ""]} then {
append url "${s}$components($c)"
set s ""
}
}
return $url
}
proc ::uri::ComposeUPHP {defport args} {
# user:pwd@host:port
array set components {
user {} pwd {} host {} port {}
}
set components(port) $defport
array set components $args
set userPwd {}
if {[string length $components(user)] || [string length $components(pwd)]} {
set userPwd $components(user)[expr {[string length $components(pwd)] ? ":$components(pwd)" : {}}]@
}
set port {}
if {[string length $components(port)] && $components(port) != $defport} {
set port :$components(port)
}
return ${userPwd}$components(host)${port}
}
proc ::uri::GetUPHP {urlvar} {
# @c Parse user, password host and port out of the url stored in
# @c variable <a urlvar>.
# @d Side effect: The extracted information is removed from the given url.
# @r List containing the extracted information in a format suitable for
# @r 'array set'.
# @a urlvar: Name of the variable containing the url to parse.
upvar \#0 [namespace current]::basic::user user
upvar \#0 [namespace current]::basic::password password
upvar \#0 [namespace current]::basic::hostspec hostspec
upvar \#0 [namespace current]::basic::port port
upvar $urlvar url
set url_save $url
array set parts {user {} pwd {} host {} port {}}
# syntax
# "//" [ <user> [":" <password> ] "@"] <host> [":" <port>] "/"
# "//" already cut off by caller
set upPattern "^(${user})(:(${password}))?@"
if {[regexp -indices -- $upPattern $url match theUser c d thePassword]} {
set fu [lindex $theUser 0]
set tu [lindex $theUser 1]
set fp [lindex $thePassword 0]
set tp [lindex $thePassword 1]
set parts(user) [string range $url $fu $tu]
set parts(pwd) [string range $url $fp $tp]
set matchEnd [lindex $match 1]
incr matchEnd
set url [string range $url $matchEnd end]
}
set hpPattern "^($hostspec)(:($port))?"
if {[regexp -indices -- $hpPattern $url match theHost c d e f g h thePort]} {
set fh [lindex $theHost 0]
set th [lindex $theHost 1]
set fp [lindex $thePort 0]
set tp [lindex $thePort 1]
set parts(host) [string range $url $fh $th]
set parts(port) [string range $url $fp $tp]
set matchEnd [lindex $match 1]
incr matchEnd
set url [string range $url $matchEnd end]
}
if {(![string match /* $url]) && ($url ne {})} {
error [list {invalid url} $url $url_save]
}
return [array get parts]
}
# ::uri::resolve --
#
# Resolve an arbitrary URL, given a base URL
#
# This code depends on the ability of uri::split to process relative URIs.
# N.B. http(s): and ftp: path does not begin with "/" and may be empty.
# The file: path (unix or win) always begins "/", even if a host is specified.
#
# RFC 3986 Sec. 5.2 defines how URI relative resolution should proceed.
# This command is a "strict parser" in the sense of Sec. 5.2.2: it does not
# allow a relative URI such as "http:foo/bar.html". See also the last example
# in Sec. 5.4.2 and uri-rfc2396.test test uri-rfc2396-11.19.
#
# Arguments:
# base base URL (absolute)
# url arbitrary URL
#
# Results:
# Returns a URL
proc ::uri::resolve {base url} {
if {[isrelative $url]} {
set canon 1
array set baseparts [split $base]
switch -- $baseparts(scheme) {
http -
https -
ftp -
file {
set changed 0
array set relparts [split $baseparts(scheme):$url]
if {[array names relparts path] != {path}} {
set relparts(path) {}
}
if { [string match /* $url] } {
set baseparts(path) $relparts(path)
if { [info exists baseparts(pbare)]
&& [info exists relparts(pbare)]
} {
# This test and action are sufficient to make
# uri::resolve work for all schemes and quirk options.
set baseparts(pbare) $relparts(pbare)
}
catch {
if {$relparts(host) != ""} {
# RFC 3986 section 4.2 and 5.2.2.
# url has no scheme, but has authority
# ("UPHP" or User,Password,Host,Port). Use that
# authority. Do not transfer credentials or port
# number from the base authority.
set baseparts(host) $relparts(host)
set baseparts(user) {}
set baseparts(pwd) {}
set baseparts(port) {}
set baseparts(user) $relparts(user)
set baseparts(pwd) $relparts(pwd)
set baseparts(port) $relparts(port)
}
}
set changed 1
} elseif { [string match */ $baseparts(path)]
&& ([string length $relparts(path)] > 0)
} {
set baseparts(path) "$baseparts(path)$relparts(path)"
set changed 1
} elseif { [string length $relparts(path)] > 0 } {
set path [lreplace [::split $baseparts(path) /] end end]
set baseparts(path) "[::join $path /]/$relparts(path)"
set changed 1
} else {
# Do not overwrite baseparts(path). In this case,
# RFC 3986 Sec. 5.2.2 does not demand canonicalization.
# FIXME check whether the RFC assumes the base URI is
# already canonical.
set canon 0
}
}
default {
return -code error "unable to resolve relative URL \"$url\""
}
}
# query and fragment are defined for http, https; not for file, ftp
# Fragment is useful in HTML documents that are accessed by file or ftp,
# but this is not supported by the RFCs.
switch -- $baseparts(scheme) {
http -
https {
if {[array names relparts query] != {query}} {
set relparts(query) {}
}
if {[array names relparts fragment] != {fragment}} {
set relparts(fragment) {}
}
if {$changed || ($relparts(query) != {})} {
set baseparts(query) $relparts(query)
set changed 1
} else {
# Keep base query.
# FIXME error if url has empty query "?".
# FIXME (in split/join) empty query "?".
}
# RFC 3986 section 5.2.2 requires that the base fragment
# is always discarded.
set baseparts(fragment) $relparts(fragment)
# FIXME error if url has empty fragment "#".
# FIXME (in split/join) empty fragment "#".
}
ftp -
file -
default {
}
}
set url [eval [linsert [array get baseparts] 0 join]]
if {$canon} {
# RFC 3986 section 5.2.2 requires us to canonicalize the path.
set url [canonicalize $url]
} else {
}
return $url
} else {
# RFC 3986 section 5.2.2 requires us to canonicalize the path.
set url [canonicalize $url]
return $url
}
}
# ::uri::isrelative --
#
# Determines whether a URL is absolute or relative
#
# Arguments:
# url URL to check
#
# Results:
# Returns 1 if the URL is relative, 0 otherwise
proc ::uri::isrelative url {
return [expr {![regexp -- {^[A-Za-z][A-Za-z0-9+.-]*:} $url]}]
}
# ::uri::geturl --
#
# Fetch the data from an arbitrary URL.
#
# This package provides a handler for the file:
# scheme, since this conflicts with the file command.
#
# Arguments:
# url address of data resource
# args configuration options
#
# Results:
# Depends on scheme
proc ::uri::geturl {url args} {
array set urlparts [split $url]
switch -- $urlparts(scheme) {
file {
return [eval [linsert $args 0 file_geturl $url]]
}
default {
# Load a geturl package for the scheme first and only if
# that fails the scheme package itself. This prevents
# cyclic dependencies between packages.
if {[catch {package require $urlparts(scheme)::geturl}]} {
package require $urlparts(scheme)
}
return [eval [linsert $args 0 $urlparts(scheme)::geturl $url]]
}
}
}
# ::uri::file_geturl --
#
# geturl implementation for file: scheme
#
# TODO:
# This is an initial, basic implementation.
# Eventually want to support all options for geturl.
#
# Arguments:
# url URL to fetch
# args configuration options
#
# Results:
# Returns data from file
proc ::uri::file_geturl {url args} {
variable file:counter
set var [namespace current]::file[incr file:counter]
upvar #0 $var state
array set state {data {}}
array set parts [split $url]
set ch [open $parts(path)]
# Could determine text/binary from file extension,
# except on Macintosh
# fconfigure $ch -translation binary
set state(data) [read $ch]
close $ch
return $var
}
# ::uri::join --
#
# Format a URL
#
# Arguments:
# args components, key-value format
#
# Results:
# A URL
proc ::uri::join args {
array set components $args
return [eval [linsert $args 0 Join[string totitle $components(scheme)]]]
}
# ::uri::canonicalize --
#
# Canonicalize a URL
#
# Acknowledgements:
# Andreas Kupries <andreas_kupries@users.sourceforge.net>
# Keith Nash <kjnash@users.sourceforge.net>
#
# Arguments:
# uri URI (which contains a path component)
#
# Results:
# The URI with the filename path in its canonical form.
# This is not full URI "normalization" which may require further
# processing.
proc ::uri::canonicalize uri {
# Make uri canonical with respect to dots (path changing commands)
#
# Remove single dots (.) => pwd not changing
# Remove double dots (..) => gobble previous segment of path
#
# Fixes for this command:
#
# * Ignore any url which cannot be split into components by this
# module. Just assume that such urls do not have a path to
# canonicalize.
#
# * Ignore any url which could be split into components, but does
# not have a path component.
#
# In the text above 'ignore' means
# 'return the url unchanged to the caller'.
if {[catch {array set u [::uri::split $uri]}]} {
return $uri
}
if {![info exists u(path)]} {
return $uri
}
# RemoveDotSegments works perfectly well on paths without a leading "/", but
# removing and re-adding the quirks ensures RFC 3986 conformance in a few
# corner cases.
RemoveQuirk3986 u
set u(path) [RemoveDotSegments $u(path)]
AddQuirk3986 u
set uri [eval [linsert [array get u] 0 ::uri::join]]
return $uri
}
# ::uri::RemoveDotSegments --
#
# Remove any segments "." and ".." from a URI path.
# Optionally remove empty segments {}.
#
# Intended to implement the "remove_dot_segments" routine
# defined in RFC 3986 Sec. 5.2.4.
#
# Acknowledgements:
# Andreas Kupries <andreas_kupries@users.sourceforge.net>
# Keith Nash <kjnash@users.sourceforge.net>
#
# Arguments:
# path path component of a URI
#
# Results:
# The URI path in its canonical form.
proc ::uri::RemoveDotSegments path {
variable Quirks
set oldList [::split $path /]
if {[lindex $oldList 0] == {}} {
set lead 1
} else {
set lead 0
}
set end [llength $oldList]
incr end -1
# i - index of element seg in oldList
# j - index of last element written to newList
set i 0
set j -1
set newList {}
foreach seg $oldList {
if { $Quirks(RemoveDoubleSlashes)
&& ($seg == {}) && ($i != 0) && ($i != $end)
} {
# Throw away this empty segment.
# This merges adjacent "/".
# If the first or last segment is empty, it is handled at "else".
# Other empty segments are also handled at "else" if this quirk has
# not been requested.
} elseif {($seg == {.}) && ($i == $end)} {
# Replace "." with {} to keep a trailing "/" in path.
lappend newList {}
incr j
} elseif {$seg == {.}} {
# Throw away this "." segment.
} elseif {($seg == {..}) && ($j > $lead - 1) && ($i == $end)} {
# Remove the element previously added to newList, and
# replace it with {} to keep a trailing "/" in path.
set newList [lreplace $newList $j $j {}]
} elseif {($seg == {..}) && ($j > $lead - 1)} {
# Remove the element previously added to newList.
set newList [lreplace $newList $j $j]
incr j -1
} elseif {($seg == {..}) && ($i == $end)} {
# Can't go any deeper in newList, but this path needs a
# leading "/".
lappend newList {}
incr j
} elseif {$seg == {..}} {
# Can't go any deeper in newList.
} else {
# A "normal" path segment!
lappend newList $seg
incr j
}
incr i
}
return [::join $newList /]
}
# ::uri::RemoveQuirk3986
#
# Work on an array produced by uri::split. Read the path and pbare
# elements, and convert the path element to RFC 3986 compliance from
# NoInitialSlash and NoExtraKeys quirks modes IF the caller has requested
# these quirks AND they are used by the array's scheme.
#
# Full RFC 3986 compliance is not possible if the caller has set both the
# quirks NoInitialSlash and NoExtraKeys. This mode is offered for
# backward compatibility. See documentation uri(n).
#
# Arguments:
# arrName Name of array in the caller's stack frame that holds the
# results of uri::split.
# Results:
# No return value. The array is modified as a side effect.
proc ::uri::RemoveQuirk3986 {arrName} {
variable Quirks
upvar 1 $arrName u
if { $Quirks(NoInitialSlash)
&& ([lsearch {http https ftp} $u(scheme)] != -1)
} {
if {$Quirks(NoExtraKeys)} {
array set u {pbare 0}
} else {
# Keep existing value of u(pbare).
}
set PathFirst [string index $u(path) 0]
if {($PathFirst != {}) && ($PathFirst != {/})} {
# If the quirk is set and used, then the leading "/" of the path has
# been stripped. Put it back.
set u(path) "/$u(path)"
} elseif {($PathFirst != {}) && ($PathFirst == {/})} {
# In principle we should prepend "/" to u(path) here too, but this
# leads to perverse results, e.g. uri::join with path "/" becomes
# path "//".
} elseif {($PathFirst == {}) && (!$u(pbare))} {
# This is how {} and / are distinguished for the value of the
# 3986-defined path, when the quirk is set and used, i.e. when the
# leading "/" of the path has been stripped.
set u(path) "/"
} else {
# Leave u(path) unchanged.
}
}
if {$Quirks(NoInitialSlash) && (!$Quirks(NoExtraKeys))} {
# pbare is required
} else {
array unset u pbare
}
return
}
# ::uri::AddQuirk3986
#
# Work on an array produced by uri::split. Read the path element, and
# convert the path and pbare elements from RFC 3986 compliance to
# NoInitialSlash and NoExtraKeys quirks modes IF the caller has requested
# these quirks AND they are used by the array's scheme.
#
# Arguments:
# arrName Name of array in the caller's stack frame that holds the
# results of uri::split.
# Results:
# No return value. The array is modified as a side effect.
proc ::uri::AddQuirk3986 arrName {
variable Quirks
upvar 1 $arrName u
array unset u pbare
if { $Quirks(NoInitialSlash)
&& ([lsearch {http https ftp} $u(scheme)] != -1)
} {
if {$Quirks(NoExtraKeys)} {
# u(pbare) is refused
} elseif {($u(path) == {})} {
set u(pbare) 1
} else {
set u(pbare) 0
}
# In principle we should remove only the first "/", not all
# of them, but it in this quirk regime it is cleaner to keep the
# rule that the path never begins with "/".
set u(path) [string trimleft $u(path) /]
} else {
}
return
}
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# regular expressions covering various url schemes
# Currently known URL schemes:
#
# (RFC 1738)
# ------------------------------------------------
# scheme basic syntax of scheme specific part
# ------------------------------------------------
# ftp //<user>:<password>@<host>:<port>/<cwd1>/.../<cwdN>/<name>;type=<typecode>
# //<user>:<password>@<host>:<port>/fpath;type=<typecode>
#
# http //<host>:<port>/<hpath>?<searchpart>
#
# gopher //<host>:<port>/<gophertype><selector>
# <gophertype><selector>%09<search>
# <gophertype><selector>%09<search>%09<gopher+_string>
#
# mailto <rfc822-addr-spec>
# news <newsgroup-name>
# <message-id>
# nntp //<host>:<port>/<newsgroup-name>/<article-number>
# telnet //<user>:<password>@<host>:<port>/
# wais //<host>:<port>/<database>
# //<host>:<port>/<database>?<search>
# //<host>:<port>/<database>/<wtype>/<wpath>
# file //<host>/<fpath>
# prospero //<host>:<port>/<hsoname>;<field>=<value>
# ------------------------------------------------
#
# (RFC 2111)
# ------------------------------------------------
# scheme basic syntax of scheme specific part
# ------------------------------------------------
# mid message-id
# message-id/content-id
# cid content-id
# ------------------------------------------------
#
# (RFC 2255)
# ------------------------------------------------
# scheme basic syntax of scheme specific part
# ------------------------------------------------
# ldap //<host>:<port>/<dn>?<attrs>?<scope>?<filter>?<extensions>
# ------------------------------------------------
# ------------------------------------------------------------------------------
# IMPORTANT WARNINGS
# ------------------------------------------------------------------------------
# (1) THE PATTERNS DEFINED BELOW (with one exception) ARE NOT USED FOR PARSING
# URLs BY ANY OF THIS PACKAGE'S COMMANDS.
# (2) THAT EXCEPTION IS THE VARIABLE ::uri::ftp::typepart
# (3) AS LONG AS THAT VARIABLE IS ASSIGNED THE CORRECT VALUE, ALL THE
# uri::register CALLS CAN BE DELETED WITHOUT AFFECTING THE uri::* COMMANDS.
# (2) REGISTRATION OF A SCHEME DOES NOT IMPLEMENT COMMANDS FOR THAT SCHEME.
# (3) REGISTRATION OF A SCHEME IS NOT NECESSARY TO IMPLEMENT COMMANDS FOR THAT
# SCHEME.
# Instead:
# (4) THE PATTERNS ARE FOR REFERENCE, AND CAN BE ACCESSED VIA THESE NAMESPACE
# VARIABLES, OR IN SOME CASES VIA VARIABLES MAINTAINED BY uri::register.
# (5) THE VARIABLES schemepart AND url ARE MENTIONED IN THE DOCUMENTATION.
# (6) UNDOCUMENTED VARIABLES MIGHT BE ACCESSED BY THIRD-PARTY CODE.
# (7) THEREFORE EVERYTHING IS RETAINED FOR BACKWARD COMPATIBILITY.
# ------------------------------------------------------------------------------
# FTP
uri::register ftp {
# Please read the warnings above.
variable escape [set [namespace parent [namespace current]]::basic::escape]
variable login [set [namespace parent [namespace current]]::basic::login]
variable charN {[a-zA-Z0-9$_.+!*'(,)?:@&=-]}
variable char "(${charN}|${escape})"
variable segment "${char}*"
variable path "${segment}(/${segment})*"
variable type {[AaDdIi]}
variable typepart ";type=(${type})"
# Used elsewhere: typepart
variable schemepart \
"//${login}(/${path}(${typepart})?)?"
variable url "ftp:${schemepart}"
}
# FILE
uri::register file {
# Please read the warnings above.
variable host [set [namespace parent [namespace current]]::basic::host]
variable path [set [namespace parent [namespace current]]::ftp::path]
variable schemepart "//(${host}|localhost)?/${path}"
variable url "file:${schemepart}"
}
# HTTP
uri::register {http https} {
# Please read the warnings above.
variable escape \
[set [namespace parent [namespace current]]::basic::escape]
variable hostOrPort \
[set [namespace parent [namespace current]]::basic::hostOrPort]
variable charN {[a-zA-Z0-9$_.+!*'(,);:@&=-]}
variable char "($charN|${escape})"
variable segment "${char}*"
variable path "${segment}(/${segment})*"
variable search $segment
variable schemepart \
"//${hostOrPort}(/${path}(\\?${search})?)?"
variable url "http:${schemepart}"
}
# GOPHER
uri::register gopher {
# Please read the warnings above.
variable xChar \
[set [namespace parent [namespace current]]::basic::xChar]
variable hostOrPort \
[set [namespace parent [namespace current]]::basic::hostOrPort]
variable search \
[set [namespace parent [namespace current]]::http::search]
variable type $xChar
variable selector "$xChar*"
variable string $selector
variable schemepart \
"//${hostOrPort}(/(${type}(${selector}(%09${search}(%09${string})?)?)?)?)?"
variable url "gopher:${schemepart}"
}
# MAILTO
uri::register mailto {
# Please read the warnings above.
variable xChar [set [namespace parent [namespace current]]::basic::xChar]
variable host [set [namespace parent [namespace current]]::basic::host]
variable schemepart "$xChar+(@${host})?"
variable url "mailto:${schemepart}"
}
# NEWS
uri::register news {
# Please read the warnings above.
variable escape [set [namespace parent [namespace current]]::basic::escape]
variable alpha [set [namespace parent [namespace current]]::basic::alpha]
variable host [set [namespace parent [namespace current]]::basic::host]
variable aCharN {[a-zA-Z0-9$_.+!*'(,);/?:&=-]}
variable aChar "($aCharN|${escape})"
variable gChar {[a-zA-Z0-9$_.+-]}
variable newsgroup-name "${alpha}${gChar}*"
variable message-id "${aChar}+@${host}"
variable schemepart "\\*|${newsgroup-name}|${message-id}"
variable url "news:${schemepart}"
}
# WAIS
uri::register wais {
# Please read the warnings above.
variable uChar \
[set [namespace parent [namespace current]]::basic::xChar]
variable hostOrPort \
[set [namespace parent [namespace current]]::basic::hostOrPort]
variable search \
[set [namespace parent [namespace current]]::http::search]
variable db "${uChar}*"
variable type "${uChar}*"
variable path "${uChar}*"
variable database "//${hostOrPort}/${db}"
variable index "//${hostOrPort}/${db}\\?${search}"
variable doc "//${hostOrPort}/${db}/${type}/${path}"
#variable schemepart "${doc}|${index}|${database}"
variable schemepart \
"//${hostOrPort}/${db}((\\?${search})|(/${type}/${path}))?"
variable url "wais:${schemepart}"
}
# PROSPERO
uri::register prospero {
# Please read the warnings above.
variable escape \
[set [namespace parent [namespace current]]::basic::escape]
variable hostOrPort \
[set [namespace parent [namespace current]]::basic::hostOrPort]
variable path \
[set [namespace parent [namespace current]]::ftp::path]
variable charN {[a-zA-Z0-9$_.+!*'(,)?:@&-]}
variable char "(${charN}|$escape)"
variable fieldname "${char}*"
variable fieldvalue "${char}*"
variable fieldspec ";${fieldname}=${fieldvalue}"
variable schemepart "//${hostOrPort}/${path}(${fieldspec})*"
variable url "prospero:$schemepart"
}
# LDAP
uri::register {ldap ldaps} {
# Please read the warnings above.
variable hostOrPort \
[set [namespace parent [namespace current]]::basic::hostOrPort]
# very crude parsing
variable dn {[^?]*}
variable attrs {[^?]*}
variable scope "base|one|sub"
variable filter {[^?]*}
# extensions are not handled yet
variable schemepart "//${hostOrPort}(/${dn}(\?${attrs}(\?(${scope})(\?${filter})?)?)?)?"
variable url "ldap:$schemepart"
}
package provide uri 1.2.7
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