[bug #60289] wget --continue: Range header is included in other options' HEAD requests

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60289>

                 Summary: wget --continue: Range header is included in other
options' HEAD requests
                 Project: GNU Wget
            Submitted by: None
            Submitted on: Thu 25 Mar 2021 03:14:57 PM UTC
                Category: Program Logic
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Clayton M.
        Originator Email: chariblaze1@gmail.com
             Open/Closed: Open
                 Release: None
         Discussion Lock: Any
        Operating System: None
         Reproducibility: Every Time
           Fixed Release: None
         Planned Release: None
              Regression: None
           Work Required: None
          Patch Included: No

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Details:

If --continue/-c is combined with an option that (first) sends a HEAD request,
a Range header is unnecessarily included and the server might respond with 416
Requested Range Not Satisfiable.

Including Range would be expected if it was manually included with --header,
but I think since -c is for downloading it should only affect specifically GET
requests.

Test with Wget 1.21.1:

$ wget https://www.nirsoft.net/utils/downtester.zip
$ touch --date="2010-01-01" downtester.zip    # Remote file is timestamped
2013
$ wget -d --continue --timestamping --no-if-modified-since
https://www.nirsoft.net/utils/downtester.zip

(replace older local file, else continue partially completed download)

Excerpt of output:

---request begin---
HEAD /utils/downtester.zip HTTP/1.1
Range: bytes=63701-
User-Agent: Wget/1.21.1
Accept: */*
Accept-Encoding: identity
Host: www.nirsoft.net
Connection: Keep-Alive

---request end---
HTTP request sent, awaiting response...
---response begin---
HTTP/1.1 416 Requested Range Not Satisfiable
Date: Thu, 25 Mar 2021 01:42:27 GMT
Server: Apache
Keep-Alive: timeout=4, max=50
Connection: Keep-Alive
Content-Type: text/html; charset=iso-8859-1

---response end---




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