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#! /usr/bin/env tclsh
package require http 2.7
package require sqlite3
namespace eval ::appfs {
variable cachedir "/tmp/appfs-cache"
variable ttl 3600
proc _hash_sep {hash {seps 4}} {
for {set idx 0} {$idx < $seps} {incr idx} {
append retval "[string range $hash [expr {$idx * 2}] [expr {($idx * 2) + 1}]]/"
}
append retval "[string range $hash [expr {$idx * 2}] end]"
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if {![info exists ::appfs::db]} {
file mkdir $::appfs::cachedir
sqlite3 ::appfs::db [file join $::appfs::cachedir cache.db]
}
_db eval {CREATE TABLE IF NOT EXISTS sites(hostname PRIMARY KEY, lastUpdate);}
_db eval {CREATE TABLE IF NOT EXISTS packages(hostname, sha1, package, version, os, cpuArch, isLatest, haveManifest);}
_db eval {CREATE TABLE IF NOT EXISTS files(package_sha1, type, time, source, size, perms, file_sha1, file_name, file_directory);}
}
proc download {hostname hash {method sha1}} {
set url "http://$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]
set lastUpdates [_db eval {SELECT lastUpdate FROM sites WHERE hostname = $hostname LIMIT 1;}]
if {[llength $lastUpdates] == 0} {
set lastUpdate 0
} else {
set lastUpdate [lindex $lastUpdates 0]
}
if {$now < ($lastUpdate + $::appfs::ttl)} {
return COMPLETE
}
if {[string match "*\[/~\]*" $hostname]} {
return -code error "Invalid hostname"
}
set url "http://$hostname/appfs/index"
catch {
set token [::http::geturl $url]
if {[::http::ncode $token] == "200"} {
set indexcachefile [_cachefile $url "SERVERS/[string tolower $hostname]" 0]
if {![file exists $indexcachefile]} {
set indexhash_data [::http::data $token]
}
::http::reset $token
$token cleanup
}
if {![info exists indexhash_data]} {
return -code error "Unable to fetch $url"
}
set fd [open $indexcachefile]
gets $fd indexhash_data
close $fd
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if {$pkgInfo(isLatest)} {
_db eval {UPDATE packages SET isLatest = 0 WHERE hostname = $hostname AND package = $pkgInfo($package) AND os = $pkgInfo($package) AND cpuArch = $pkgInfo(cpuArch);}
}
_db eval {INSERT INTO packages (hostname, sha1, package, version, os, cpuArch, isLatest, haveManifest) VALUES ($hostname, $pkgInfo(hash), $pkgInfo(package), $pkgInfo(version), $pkgInfo(os), $pkgInfo(cpuArch), $pkgInfo(isLatest), 0);}
}
_db eval {INSERT OR REPLACE INTO sites (hostname, lastUpdate) VALUES ($hostname, $now);}
return COMPLETE
}
proc getpkgmanifest {hostname package_sha1} {
set haveManifests [_db eval {SELECT haveManifest FROM packages WHERE sha1 = $package_sha1 LIMIT 1;}]
set haveManifest [lindex $haveManifests 0]
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