[Varnish] #1758: Open ended range request results in truncated images

[Varnish]

#1758: Open ended range request results in truncated images
-----------------------------+--------------------
 Reporter:  jafa             |       Type:  defect
   Status:  new              |   Priority:  normal
Milestone:                   |  Component:  build
  Version:  4.0.3            |   Severity:  normal
 Keywords:  range truncated  |
-----------------------------+--------------------
 Symptom: client (Kodi) getting truncated images.

 Client (Kodi) sent requests HEAD, HEAD, GET. The GET request include
 "Range: bytes=0-".

 Varnish responded:
 HEAD: "Content-Length: 50726"
 HEAD: "Content-Length: 50726"
 GET: "Content-Range: bytes 0-14157/14158" and "Content-Length: 14158"

 A few minutes later I hit it from a webbrowser (no range request).
 Varnish responded with "Content-Length: 50726" and delivered the complete
 data.

 Full headers in attached files.

 Workaround = "unset req.http.Range". This avoids the problem - images are
 delivered correctly.

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1758>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator