Re: Save link as... silent failure on gopher protocol

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Hello, I'm sending two patches with an idea to solve this problem.
It's a proof of concept that I'm offering to develop and complete, although
I have very little free time.

The first patch works with the latest dillo release (3.3.0) but also works
with the current repository.
It implements changes in dillo, download.dpi, and the file and data DPIs as
examples.
The second patch works with the latest gopher.dpi repository.

The main idea is that the DPIs that handle protocols save the URL and write
the file themselves, coordinating with download.dpi and dillo.

To do this, they implement a new DPI command: `save_url`
d_cmd =3D a_Dpip_build_cmd("cmd=3D%s url=3D%s destination=3D%s", "save_url"=
, url,
dl_dest);

Dillo initiates a download, sending it to download.dpi as before. If it's
HTTP* or FTP*, it downloads directly as it does now. Otherwise, it will
send a `save_url` command to Dillo to coordinate. This allows Dillo to
notify the user, verify the security of the change, etc.Currently, Dillo
only checks if there's a DPI that handles the requested protocol.

(A new function (`a_Dpiapi_is_service_handled(server_str)`) queries `dpid`
without executing the DPI. No code is modified in `dpid`. Modifying `dpid`
or executing the DPI would allow querying the capabilities of the DPIs, but
it doesn't seem necessary.)

- If a DPI is present, it sends the `save_url` command to the DPI that
coordinates with `download.dpi` via a secondary channel so that downloads
can continue even if all Dillo windows are closed.

- If the protocol isn't handled, it notifies download.dpi through the
secondary channel (this reduces the amount of code).

The next step would be to implement `save_url` in other protocol DPIs.

A possible change to download.dpi once all is done is to leave download.dpi
it as just a GUI for DPIs and extract the code to download HTTP to a DPI.
(There's already ftp.dpi)

One last thing: can you recommend a simple Git manual?


Saludos
Diego.

El lun, 25 may 2026 a las 21:23, Rodrigo Arias (<[email protected]>)
escribi=C3=B3:

> Hi,
>
> On Mon, May 25, 2026 at 09:25:58AM -0700, Ben Collver wrote:
> >Good day,
> >
> >I am using dillo 3.3.0 on Slackware64 15.0.
> >
> >If I open a gopher directory, right-click on an item, and click
> >Save link as..., this opens a file save dialog.  If i click OK, it
> >dismisses the dialog.  I expected it to save something, but it
> >creates no new files.
> >
> >Gopher URI:  gopher://gopher.pglaf.org/1/4/0/2/8/40282/
> >Top item:    40282-0
> >
> >I found the following workaround:
> >
> >* Left click 40282-0
> >* Click Save button in browser toolbar
> >
> >This creates a new file as expected.
>
> Yes, this is a known limitation of the downloads in Dillo. Using the
> "Save link as" to fetch a new resource will use wget under the hood,
> which only allows http(s). You can see the message in the console:
>
> > UIcmd_save: /tmp/40282-0.txt
> > ** WARNING **: Ignoring download request for
> > 'gopher://gopher.pglaf.org/0/4/0/2/8/40282/40282-0.txt': not in cache
> > and not downloadable.
>
> Browsing to the target file makes the gopher plugin fetch the file and
> place it in the Dillo cache (you can see it in about:cache). Then saving
> the current page (or going back and clicking the "Save link as" entry)
> works because it fetches it from the cache.
>
> It is planned to solve this some time in the future, but involves
> complex changes. In the meanwhile, you can use this workaround.
>
> Best,
> Rodrigo.
> _______________________________________________
> Dillo-dev mailing list -- dillo-dev-lx9mn2B4QYRWk0Htik3J/[email protected]
> To unsubscribe send an email to dillo-dev-leave-lx9mn2B4QYRWk0Htik3J/[email protected]
>

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<div dir=3D"ltr">Hello, I&#39;m sending two patches with an idea to solve t=
his problem.<br>It&#39;s a proof of concept that I&#39;m offering to develo=
p and complete, although I have very little free time.<br><br>The first pat=
ch works with the latest dillo release (3.3.0) but also works with the curr=
ent repository.<br>It implements changes in dillo, download.dpi, and the fi=
le and data DPIs as examples.<br>The second patch works with the latest gop=
her.dpi repository.<br><br>The main idea is that the DPIs that handle proto=
cols save the URL and write the file themselves, coordinating with download=
.dpi and dillo.<br><br>To do this, they implement a new DPI command: `save_=
url`<br>d_cmd =3D a_Dpip_build_cmd(&quot;cmd=3D%s url=3D%s destination=3D%s=
&quot;, &quot;save_url&quot;, url, dl_dest);<br><br><div>Dillo initiates a =
download, sending it to download.dpi as before. If it&#39;s HTTP* or FTP*, =
it downloads directly as it does now. Otherwise, it will send a `save_url` =
command to Dillo to coordinate. This allows Dillo to notify the user, verif=
y the security of the change, etc.Currently, Dillo only checks if there&#39=
;s a DPI that handles the requested protocol.</div><div><br></div>(A new fu=
nction (`a_Dpiapi_is_service_handled(server_str)`) queries `dpid` without e=
xecuting the DPI. No code is modified in `dpid`. Modifying `dpid` or execut=
ing the DPI would allow querying the capabilities of the DPIs, but it doesn=
&#39;t seem necessary.)<br><br>- If a DPI is present, it sends the `save_ur=
l` command to the DPI that coordinates with `download.dpi` via a secondary =
channel so that downloads can continue even if all Dillo windows are closed=
.<br><br>- If the protocol isn&#39;t handled, it notifies download.dpi thro=
ugh the secondary channel (this reduces the amount of code).<br><br>The nex=
t step would be to implement `save_url` in other protocol DPIs.<br><br>A po=
ssible change to download.dpi once all is done is to leave download.dpi it =
as just a GUI for DPIs and extract the code to download HTTP to a DPI. (The=
re&#39;s already ftp.dpi)<br><br><div>One last thing: can you recommend a s=
imple Git manual?</div><div><br></div><div><br></div><div>Saludos</div><div=
>Diego.</div></div><br><div class=3D"gmail_quote gmail_quote_container"><di=
v dir=3D"ltr" class=3D"gmail_attr">El lun, 25 may 2026 a las 21:23, Rodrigo=
 Arias (&lt;<a href=3D"mailto:[email protected]">[email protected]</a>&gt=
;) escribi=C3=B3:<br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
">Hi,<br>
<br>
On Mon, May 25, 2026 at 09:25:58AM -0700, Ben Collver wrote:<br>
&gt;Good day,<br>
&gt;<br>
&gt;I am using dillo 3.3.0 on Slackware64 15.0.<br>
&gt;<br>
&gt;If I open a gopher directory, right-click on an item, and click<br>
&gt;Save link as..., this opens a file save dialog.=C2=A0 If i click OK, it=
<br>
&gt;dismisses the dialog.=C2=A0 I expected it to save something, but it<br>
&gt;creates no new files.<br>
&gt;<br>
&gt;Gopher URI:=C2=A0 gopher://<a href=3D"http://gopher.pglaf.org/1/4/0/2/8=
/40282/" rel=3D"noreferrer" target=3D"_blank">gopher.pglaf.org/1/4/0/2/8/40=
282/</a><br>
&gt;Top item:=C2=A0 =C2=A0 40282-0<br>
&gt;<br>
&gt;I found the following workaround:<br>
&gt;<br>
&gt;* Left click 40282-0<br>
&gt;* Click Save button in browser toolbar<br>
&gt;<br>
&gt;This creates a new file as expected.<br>
<br>
Yes, this is a known limitation of the downloads in Dillo. Using the <br>
&quot;Save link as&quot; to fetch a new resource will use wget under the ho=
od, <br>
which only allows http(s). You can see the message in the console:<br>
<br>
&gt; UIcmd_save: /tmp/40282-0.txt<br>
&gt; ** WARNING **: Ignoring download request for <br>
&gt; &#39;gopher://<a href=3D"http://gopher.pglaf.org/0/4/0/2/8/40282/40282=
-0.txt" rel=3D"noreferrer" target=3D"_blank">gopher.pglaf.org/0/4/0/2/8/402=
82/40282-0.txt</a>&#39;: not in cache <br>
&gt; and not downloadable.<br>
<br>
Browsing to the target file makes the gopher plugin fetch the file and <br>
place it in the Dillo cache (you can see it in about:cache). Then saving <b=
r>
the current page (or going back and clicking the &quot;Save link as&quot; e=
ntry) <br>
works because it fetches it from the cache.<br>
<br>
It is planned to solve this some time in the future, but involves <br>
complex changes. In the meanwhile, you can use this workaround.<br>
<br>
Best,<br>
Rodrigo.<br>
_______________________________________________<br>
Dillo-dev mailing list -- <a href=3D"mailto:dillo-dev-lx9mn2B4QYRWk0Htik3J/[email protected]" target=
=3D"_blank">dillo-dev-lx9mn2B4QYRWk0Htik3J/[email protected]</a><br>
To unsubscribe send an email to <a href=3D"mailto:dillo-dev-leave@mailman3.=
com" target=3D"_blank">dillo-dev-leave-lx9mn2B4QYRWk0Htik3J/[email protected]</a><br>
</blockquote></div>

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