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#! /usr/bin/env tclsh

package require http 2.7
package require sqlite3


package require sha1





namespace eval ::appfs {
	variable cachedir "/tmp/appfs-cache"
	variable ttl 3600
	variable nttl 60

	proc _hash_sep {hash {seps 4}} {




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#! /usr/bin/env tclsh

package require http 2.7
package require sqlite3

if {[catch {
	package require sha1
}]} {
	@@SHA1.TCL@@
	package require sha1
}

namespace eval ::appfs {
	variable cachedir "/tmp/appfs-cache"
	variable ttl 3600
	variable nttl 60

	proc _hash_sep {hash {seps 4}} {
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			set filekey [_hash_sep $filekey]
		}

		set file [file join $::appfs::cachedir $filekey]

		file mkdir [file dirname $file]

		if {![file exists $file]} {



			set tmpfile "${file}.new"

			set fd [open $tmpfile "w"]
			fconfigure $fd -translation binary

			catch {
				set token [::http::geturl $url -channel $fd -binary true]
			}

			if {[info exists token]} {
				set ncode [::http::ncode $token]
				::http::reset $token
			} else {
				set ncode "900"
			}

			close $fd

			if {$keyIsHash} {
				set hash [string tolower [sha1::sha1 -hex -file $tmpfile]]
			} else {
				set hash $key
			}

			if {$ncode == "200" && $hash == $key} {
				file rename -force -- $tmpfile $file
			} else {
				file delete -force -- $tmpfile
			}
		}

		return $file
	}


	proc _isHash {value} {







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			set filekey [_hash_sep $filekey]
		}

		set file [file join $::appfs::cachedir $filekey]

		file mkdir [file dirname $file]

		if {[file exists $file]} {
			return $file
		}

		set tmpfile "${file}.[expr {rand()}]"

		set fd [open $tmpfile "w"]
		fconfigure $fd -translation binary

		catch {
			set token [::http::geturl $url -channel $fd -binary true]
		}

		if {[info exists token]} {
			set ncode [::http::ncode $token]
			::http::reset $token
		} else {
			set ncode "900"
		}

		close $fd

		if {$keyIsHash} {
			set hash [string tolower [sha1::sha1 -hex -file $tmpfile]]
		} else {
			set hash $key
		}

		if {$ncode == "200" && $hash == $key} {
			file rename -force -- $tmpfile $file
		} else {
			file delete -force -- $tmpfile

		}

		return $file
	}


	proc _isHash {value} {
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		switch -- $os {
			"linux" - "freebsd" - "openbsd" - "netbsd" {
				return $os
			}
			"sunos" {
				return "solaris"
			}



		}

		return -code error "Unable to normalize OS: $os"
	}

	proc _normalizeCPU {cpu} {
		set cpu [string tolower [string trim $cpu]]

		switch -glob -- $cpu {
			"i?86" {
				return "ix86"
			}
			"x86_64" {
				return $cpu



			}
		}

		return -code error "Unable to normalize CPU: $cpu"
	}

	proc init {} {







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		switch -- $os {
			"linux" - "freebsd" - "openbsd" - "netbsd" {
				return $os
			}
			"sunos" {
				return "solaris"
			}
			"noarch" - "none" - "any" - "all" {
				return "noarch"
			}
		}

		return -code error "Unable to normalize OS: $os"
	}

	proc _normalizeCPU {cpu} {
		set cpu [string tolower [string trim $cpu]]

		switch -glob -- $cpu {
			"i?86" {
				return "ix86"
			}
			"x86_64" {
				return $cpu
			}
			"noarch" - "none" - "any" - "all" {
				return "noarch"
			}
		}

		return -code error "Unable to normalize CPU: $cpu"
	}

	proc init {} {
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	}

	proc download {hostname hash {method sha1}} {
		set url "http://$hostname/appfs/$method/$hash"
		set file [_cachefile $url $hash]

		if {![file exists $file]} {
			return -code error "Unable to fetch"
		}

		return $file
	}

	proc getindex {hostname} {
		set now [clock seconds]







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	}

	proc download {hostname hash {method sha1}} {
		set url "http://$hostname/appfs/$method/$hash"
		set file [_cachefile $url $hash]

		if {![file exists $file]} {
			return -code error "Unable to fetch (file does not exist: $file)"
		}

		return $file
	}

	proc getindex {hostname} {
		set now [clock seconds]
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		catch {
			set token [::http::geturl $url]
			if {[::http::ncode $token] == "200"} {
				set indexhash_data [::http::data $token]
			}
			::http::reset $token
			$token cleanup
		}

		if {![info exists indexhash_data]} {
			# Cache this result for 60 seconds
			_db eval {INSERT OR REPLACE INTO sites (hostname, lastUpdate, ttl) VALUES ($hostname, $now, $::appfs::nttl);}

			return -code error "Unable to fetch $url"







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		catch {
			set token [::http::geturl $url]
			if {[::http::ncode $token] == "200"} {
				set indexhash_data [::http::data $token]
			}
			::http::reset $token
			::http::cleanup $token
		}

		if {![info exists indexhash_data]} {
			# Cache this result for 60 seconds
			_db eval {INSERT OR REPLACE INTO sites (hostname, lastUpdate, ttl) VALUES ($hostname, $now, $::appfs::nttl);}

			return -code error "Unable to fetch $url"
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			if {$line == ""} {
				continue
			}

			set work [split $line ","]

			unset -nocomplain pkgInfo

			set pkgInfo(package)  [lindex $work 0]
			set pkgInfo(version)  [lindex $work 1]
			set pkgInfo(os)       [_normalizeOS [lindex $work 2]]
			set pkgInfo(cpuArch)  [_normalizeCPU [lindex $work 3]]
			set pkgInfo(hash)     [string tolower [lindex $work 4]]
			set pkgInfo(hash_type) "sha1"
			set pkgInfo(isLatest) [expr {!![lindex $work 5]}]




			if {![_isHash $pkgInfo(hash)]} {
				continue
			}

			lappend curr_packages $pkgInfo(hash)








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			if {$line == ""} {
				continue
			}

			set work [split $line ","]

			unset -nocomplain pkgInfo
			if {[catch {
				set pkgInfo(package)  [lindex $work 0]
				set pkgInfo(version)  [lindex $work 1]
				set pkgInfo(os)       [_normalizeOS [lindex $work 2]]
				set pkgInfo(cpuArch)  [_normalizeCPU [lindex $work 3]]
				set pkgInfo(hash)     [string tolower [lindex $work 4]]
				set pkgInfo(hash_type) "sha1"
				set pkgInfo(isLatest) [expr {!![lindex $work 5]}]
			}]} {
				continue
			}

			if {![_isHash $pkgInfo(hash)]} {
				continue
			}

			lappend curr_packages $pkgInfo(hash)