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# resources.tcl --
#
# XSLT extension providing access to resources.
#
# Copyright (c) 2005-2008 Explain
# http://www.explain.com.au/
# Copyright (c) 2001-2004 Zveno Pty Ltd
# http://www.zveno.com/
#
# See the file "LICENSE" in this distribution for information on usage and
# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# $Id: resources.tcl,v 1.1.1.1 2009/01/16 22:11:49 joye Exp $
catch {
package require base64
}
package provide xslt::resources 1.3
namespace eval xslt::resources {
namespace export list type exists modified
}
# xslt::resources::list --
#
# List the resources available at a given location
#
# Arguments:
# locn Resource path to list
# basedir Base directory
# args not needed
#
# Results:
# Returns list of resources
proc xslt::resources::list {locnNd {baseNd {}} args} {
# What kind of resource is this? file, http, ftp, etc?
if {[llength $args]} {
return -code error "too many arguments"
}
set locn $locnNd
# The resource may be passed in as a nodeset
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
set base $baseNd
catch {set base [dom::node stringValue [lindex $baseNd 0]]}
if {[string match /* $base]} {
regsub {^(/)} $locn {} locn
}
set result {}
foreach entry [glob -nocomplain [file join $base $locn *]] {
lappend result [file tail $entry]
}
return $result
}
# xslt::resources::type --
#
# Gives the type of the resource
#
# Arguments:
# locn Resource path to type
# args not needed
#
# Results:
# Returns string describing resource
proc xslt::resources::type {locnNd args} {
if {[llength $args]} {
return -code error "too many arguments"
}
set locn $locnNd
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
if {[file isdir $locn]} {
return directory
} elseif {[file isfile $locn]} {
return file
} else {
return other
}
}
# xslt::resources::exists --
#
# Check whether a resource exists
#
# Arguments:
# locn Resource path to type
# args not needed
#
# Results:
# Returns boolean
proc xslt::resources::exists {locnNd args} {
if {[llength $args]} {
return -code error "too many arguments"
}
set locn $locnNd
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
if {[file exists $locn]} {
return 1
} else {
return 0
}
}
# xslt::resources::modified --
#
# Report last modification time of a resource
#
# Arguments:
# locn Resource path
# args not needed
#
# Results:
# Returns ISO standard date-time string
proc xslt::resources::modified {locnNd args} {
if {[llength $args]} {
return -code error "too many arguments"
}
set locn $locnNd
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
if {[file exists $locn]} {
return [clock format [file mtime $locn] -format {%Y-%m-%dT%H:%M:%S}]
} else {
return {}
}
}
# xslt::resources::mkdir --
#
# Create a directory hierarchy.
#
# Arguments:
# locn Resource path for directory
# args not needed
#
# Results:
# Returns directory created or empty string if unsuccessful
proc xslt::resources::mkdir {locnNd args} {
if {[llength $args]} {
return {}
}
set locn $locnNd
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
set dir [file split $locn]
set current [lindex $dir 0]
set remaining [lrange $dir 1 end]
while {[llength $remaining]} {
set current [file join $current [lindex $remaining 0]]
set remaining [lrange $remaining 1 end]
if {[file exists $current]} {
if {![file isdir $current]} {
return {}
}
} elseif {[file isdir $current]} {
continue
} else {
if {[catch {file mkdir $current}]} {
return {}
}
}
}
return $locn
}
# xslt::resources::copy --
#
# Copy a resource.
#
# Arguments:
# src Resource to copy
# dest Destination for resource
# args not needed
#
# Results:
# Resource copied
proc xslt::resources::copy {srcNd destNd args} {
set src $srcNd
catch {set src [dom::node stringValue [lindex $srcNd 0]]}
set dest $destNd
catch {set dest [dom::node stringValue [lindex $destNd 0]]}
if {[catch {file copy -force $src $dest} msg]} {
catch {
package require log
log::log error "copy failed due to \"$msg\""
}
return 0
} else {
return 1
}
}
# xslt::resources::move --
#
# Move (rename) a resource.
#
# Arguments:
# src Resource to move
# dest Destination for resource
# args not needed
#
# Results:
# Resource renamed
proc xslt::resources::move {srcNd destNd args} {
set src $srcNd
catch {set src [dom::node stringValue [lindex $srcNd 0]]}
set dest $destNd
catch {set dest [dom::node stringValue [lindex $destNd 0]]}
if {[catch {file rename -force $src $dest}]} {
return 0
} else {
return 1
}
}
# xslt::resources::file-attributes --
#
# Change attributes of a resource.
#
# Arguments:
# src Resource to change
# what Attribute to change
# detail Attribute value
# args not needed
#
# Results:
# Resource attribute changed
proc xslt::resources::file-set-attributes {srcNd whatNd detailNd args} {
set src $srcNd
catch {set src [dom::node stringValue [lindex $srcNd 0]]}
set what $whatNd
catch {set what [dom::node stringValue [lindex $whatNd 0]]}
set detail $detailNd
catch {set detail [dom::node stringValue [lindex $detailNd 0]]}
if {[catch {file attributes $src -$what $detail} result]} {
return {}
} else {
return $result
}
}
# xslt::resources::delete --
#
# Delete a resource
#
# Arguments:
# locn Resource path to type
# args not needed
#
# Results:
# Returns boolean
proc xslt::resources::delete {locnNd args} {
if {[llength $args]} {
return -code error "too many arguments"
}
set locn $locnNd
catch {set locn [dom::node stringValue [lindex $locnNd 0]]}
if {[catch {file delete -force $locn} msg]} {
catch {
package require log
log::log error "delete failed due to \"$msg\""
}
return 0
} else {
return 1
}
}
# xslt::resources::link --
#
# Link a resource.
#
# Arguments:
# from Link to create
# to Target of link
# args not needed
#
# Results:
# Symbolic link created
proc xslt::resources::link {fromNd toNd args} {
set from $fromNd
catch {set from [dom::node stringValue [lindex $fromNd 0]]}
set to $toNd
catch {set to [dom::node stringValue [lindex $toNd 0]]}
if {[catch {file link $from $to}]} {
return 0
} else {
return 1
}
}
# xslt::resources::write-base64 --
#
# Decode base64 encoded data and write the binary data to a file
#
# Arguments:
# fname Filename
# b64 base64 encoded data
# args not needed
#
# Results:
# File opened for writing and binary data written.
# Returns 1 if file successfully written, 0 otherwise.
proc xslt::resources::write-base64 {fnameNd b64Nd args} {
set fname $fnameNd
catch {set fname [dom::node stringValue [lindex $fnameNd 0]]}
set b64 $b64Nd
catch {set b64 [dom::node stringValue [lindex $b64Nd 0]]}
if {[catch {package require base64}]} {
return 0
}
if {[catch {open $fname w} ch]} {
return 0
} else {
set binarydata [base64::decode $b64]
fconfigure $ch -trans binary -encoding binary
puts -nonewline $ch $binarydata
close $ch
return 1
}
}
# xslt::resources::read-base64 --
#
# Read binary data from a file and base64 encode it
#
# Arguments:
# fname Filename
# args not needed
#
# Results:
# File opened for readng and contents read.
# Returns content as base64-encoded data.
proc xslt::resources::read-base64 {fnameNd args} {
set fname $fnameNd
catch {set fname [dom::node stringValue [lindex $fnameNd 0]]}
if {[catch {package require base64}]} {
return 0
}
if {[catch {open $fname} ch]} {
return 0
} else {
fconfigure $ch -trans binary -encoding binary
set binarydata [read $ch]
close $ch
return [base64::encode $binarydata]
}
}
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