When issuing a GET or HEAD request on a format folder that contains a
single artifact file, the response is an HTTP redirection to that
file. In that case, add a "Content-Disposition" HTTP header to the
response, so that it can be used with e.g. "curl -JOL" to save the
downloaded file using the actual file name instead of that of the
format folder.

Signed-off-by: Julien Floret <julien.floret@6wind.com>
Acked-by: Thomas Faivre <thomas.faivre@6wind.com>
---
 dlrepo/views/fmt.py | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/dlrepo/views/fmt.py b/dlrepo/views/fmt.py
index 0c48289b2e6f..5a2cb1105d2f 100644
--- a/dlrepo/views/fmt.py
+++ b/dlrepo/views/fmt.py
@@ -4,6 +4,7 @@
 
 import asyncio
 import logging
+import os
 from typing import Callable
 
 from aiohttp import web
@@ -149,16 +150,7 @@ class FormatFileView(BaseView):
         yield "/~{user}/products/{product}/{variant}/{product_branch}/{version}/{format}"
 
     async def head(self):
-        fmt = _get_format(self.repo(), self.request.match_info, self.access_granted)
-        if fmt.is_dirty():
-            raise web.HTTPNotFound()
-        url = fmt.url()
-        files = list(fmt.get_digests().keys())
-        if len(files) == 1:
-            url += files[0]
-        if url != self.request.path:
-            raise web.HTTPFound(url)
-        return web.Response()
+        return await self.get()
 
     async def get(self):
         """
@@ -168,9 +160,16 @@ class FormatFileView(BaseView):
             redirect to /branches/$branch/$tag/$job/$format/
         """
         fmt = _get_format(self.repo(), self.request.match_info, self.access_granted)
+        if fmt.is_dirty():
+            raise web.HTTPNotFound()
         files = list(fmt.get_digests().keys())
         if len(files) == 1 and files[0] != "index.html":
-            return web.HTTPFound(fmt.url() + files[0])
+            return web.HTTPFound(
+                fmt.url() + files[0],
+                headers={
+                    "Content-Disposition": f"attachment; filename={os.path.basename(files[0])}"
+                },
+            )
         return web.HTTPFound(fmt.url())
 
 
-- 
2.39.2

dlrepo/patches/.build.yml: SUCCESS in 43s

[fmt: add content disposition header to redirection][0] from [Julien Floret][1]

[0]: https://lists.sr.ht/~rjarry/dlrepo/patches/50873
[1]: julien.floret@6wind.com

✓ #1191903 SUCCESS dlrepo/patches/.build.yml https://builds.sr.ht/~rjarry/job/1191903

Julien Floret <julien.floret@6wind.com> wrote:
> When issuing a GET or HEAD request on a format folder that contains a
> single artifact file, the response is an HTTP redirection to that
> file. In that case, add a "Content-Disposition" HTTP header to the
> response, so that it can be used with e.g. "curl -JOL" to save the
> downloaded file using the actual file name instead of that of the
> format folder.
>
> Signed-off-by: Julien Floret <julien.floret@6wind.com>
> Acked-by: Thomas Faivre <thomas.faivre@6wind.com>
> ---

Acked-by: Robin Jarry <robin@jarry.cc>

Applied, thanks.

To git@git.sr.ht:~rjarry/dlrepo
   75d45a112ab8..7d50989d3d91  main -> main