[tor-bugs] #16907 [Onionoo]: Stop returning a 500 Internal Server Error when the hourly updater has not run for 6+ hours

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri Jan 8 08:35:18 UTC 2016

#16907: Stop returning a 500 Internal Server Error when the hourly updater has not
run for 6+ hours
 Reporter:  karsten      |          Owner:
     Type:  enhancement  |         Status:  needs_review
 Priority:  Medium       |      Milestone:
Component:  Onionoo      |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
  Sponsor:               |

Comment (by karsten):

 iwakeh, teor, thanks for the comments.  Agreed!

 virgil, if you really want to keep the current behavior in your
 application, maybe there's a way to achieve that: just include an `If-
 Modified-Since` header with a timestamp six hours ago, and you'll either
 get a 200 status code if content was modified since then or a 304 status
 code if it hasn't.  Example (with a timestamp six minutes ago):

 $ date -u
 Fri Jan  8 08:32:30 UTC 2016
 $ curl -H "If-Modified-Since: Fri, 08 Jan 2016 08:26:30 GMT" -v
 *   Trying
 * Connected to onionoo.torproject.org ( port 443 (#0)
 * TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
 * Server certificate: *.torproject.org
 * Server certificate: DigiCert SHA2 High Assurance Server CA
 * Server certificate: DigiCert High Assurance EV Root CA
 > GET /summary?limit=0 HTTP/1.1
 > Host: onionoo.torproject.org
 > User-Agent: curl/7.43.0
 > Accept: */*
 > If-Modified-Since: Fri, 08 Jan 2016 08:26:30 GMT
 < HTTP/1.1 304 Not Modified
 < Date: Fri, 08 Jan 2016 08:33:08 GMT
 < Server: Apache
 < Cache-Control: public, max-age=300
 * Connection #0 to host onionoo.torproject.org left intact

 And if you want to receive content in either case, just leave out that
 header and decide whether to display a warning based on the server's
 `Last-Modified` header.  I think we don't have change the Onionoo protocol
 for anything here.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16907#comment:17>
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