Check-in [df8e635cac]
Overview
Comment:Updated to avoid hammering remote servers if cache cannot be updated for some reason other than downloading failed
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: df8e635cacec68652b909590743e1d61ea6f51e3
User & Date: rkeene on 2015-12-08 14:13:58
Other Links: manifest | tags
Context
2016-07-10
19:05
Updated to finalize a thread that terminated even if there are no current Tcl interpreters associated with it check-in: b03c6db3d1 user: rkeene tags: trunk
2015-12-08
14:13
Updated to avoid hammering remote servers if cache cannot be updated for some reason other than downloading failed check-in: df8e635cac user: rkeene tags: trunk
2015-11-19
16:01
Updated initializer to be explicitly unsigned check-in: f905360d64 user: rkeene tags: trunk
Changes

Modified appfsd.tcl from [9efbb291d1] to [865f14848a].

284
285
286
287
288
289
290




291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324

325
326
327
328
329
330
331
			return -code error "Unable to fetch (file does not exist: $file)"
		}

		return $file
	}

	proc getindex {hostname} {




		set now [clock seconds]

		set lastUpdates [db eval {SELECT lastUpdate, ttl FROM sites WHERE hostname = $hostname LIMIT 1;}]
		if {[llength $lastUpdates] == 0} {
			set lastUpdate 0
			set ttl 0
		} else {
			set lastUpdate [lindex $lastUpdates 0]
			set ttl [lindex $lastUpdates 1]
		}

		if {$now < ($lastUpdate + $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 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"
		}

		set indexhash_data [string trim $indexhash_data "\r\n"]
		set indexhash_data [split $indexhash_data ","]
		set indexhash       [lindex $indexhash_data 0]
		set indexhashmethod [lindex $indexhash_data 1]







>
>
>
>















<
<
<
<











|
|


>







284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309




310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
			return -code error "Unable to fetch (file does not exist: $file)"
		}

		return $file
	}

	proc getindex {hostname} {
		if {[string match "*\[/~\]*" $hostname]} {
			return -code error "Invalid hostname"
		}

		set now [clock seconds]

		set lastUpdates [db eval {SELECT lastUpdate, ttl FROM sites WHERE hostname = $hostname LIMIT 1;}]
		if {[llength $lastUpdates] == 0} {
			set lastUpdate 0
			set ttl 0
		} else {
			set lastUpdate [lindex $lastUpdates 0]
			set ttl [lindex $lastUpdates 1]
		}

		if {$now < ($lastUpdate + $ttl)} {
			return COMPLETE
		}





		set url "http://$hostname/appfs/index"

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

		# Note that we attempted to fetch this index and do not try
		# again for a while
			db eval {INSERT OR REPLACE INTO sites (hostname, lastUpdate, ttl) VALUES ($hostname, $now, $::appfs::nttl);}

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

		set indexhash_data [string trim $indexhash_data "\r\n"]
		set indexhash_data [split $indexhash_data ","]
		set indexhash       [lindex $indexhash_data 0]
		set indexhashmethod [lindex $indexhash_data 1]