updatechecker: Port to libsoup3 and small other fixes

[b4n]

Port to libsoup3 (see https://github.com/geany/geany-plugins/pull/1295#issuecomment-1906999722 @jbicha) plus a couple other fixes I just couldn't leave there after seeing them :slightly_smiling_face:

:warning: DISCLAIMER: I don't know neither libsoup2.4 nor libsoup3. This is a uneducated guess by looking at the scarce documentation and the API reference. And it seems to work with limited testing (I tested manually only, for the normal case, the 404 case and the incorrect domain case -- all of which got the expected result).

[elextr]

I don't know enough about libsoup to sensibly review (and don't have the time to learn), but since Geany uses GIO why not g_file_new_for_uri() and g_file_read() (or g_file_read_async()/g_file_read_finish() to not block the UI) instead of using libsoup directly?

[xiota]

g_file_new_for_uri() and g_file_read() (or g_file_read_async()/g_file_read_finish()

It works...

#include <gio/gio.h>
#include <stdio.h>

int main() {
  GFile *file = g_file_new_for_uri("https://geany.org/service/version/");

  GError *error = NULL;
  GFileInputStream *stream = g_file_read(file, NULL, &error);

  if (!error) {
    printf("No error.\n");

    guint8 *buffer = NULL;
    gsize size = 0;

    buffer = (guint8 *)g_malloc(32);

    gboolean success = g_input_stream_read_all((GInputStream *)stream, buffer,
                                               31, &size, NULL, &error);

    if (success) {
      buffer[size] = '\0';
      printf("Data: %s\n", buffer);
    } else {
      printf("Error reading stream.\n");
    }

  } else {
    printf("Error reading uri.\n");
  }

  return 0;
}

$ gcc test.c -o test $(pkgconf --libs gio-2.0) $(pkgconf --cflags gio-2.0)

$ ./test
No error.
Data: 2.0.0

[elextr]

@xiota neat, and simple, although it has one theoretical bug (though unlikely in practice) [hint: what if 32 bytes were returned].

Just for general information, Geany used (a long time ago) to avoid GIO, which is probably why the plugin used libsoup directly. But now GIO is required by Geany so its available to the plugin.

[xiota]

Edited code in previous comment to request 31 bytes from g_input_stream_read_all().

It was written to check whether https:// is supported because I saw only file:// mentioned in the docs.

[elextr]

Unfortunately the GIO docs don't say when g_file_new_from_URI() and the associated stream was supported (that I could see) but it works on the machine I'm on ATM which is pretty olde.

PS I expect not everyone has your alias pkgconf == pkg-config :wink:

[xiota]

Unfortunately the GIO docs don't say when g_file_new_from_URI() and the associated stream was supported (that I could see) but it works on the machine I'm on ATM which is pretty olde.

Looks like it depends on gvfs... After uninstalling...

$ ./test
Error reading uri.

Maybe better to depend on gvfs than libsoup-3.0 because gvfs has a longer support history (works on LTS distros) than libsoup 3.

PS I expect not everyone has your alias pkgconf == pkg-config 😉

On my computer, pkg-config is the symlink. Looks like pkgconf and pkg-config are different projects.

[elextr]

Yeah, pkg-config is the Freedesktop original, pkgconf would appear to be a re-implementation. Your distro installs pkgconf and links the original command to it so existing scripts will work, if they happen to conform to what pkgconf considers "correct".

If an existing script fails because it depends on some edge case in pkg-config tough. And very aggressive about it they are, "if someone insists on fixing such a non-bug, this constitutes a violation of our Code of Conduct, which may be addressed by banning from this repository".

Edit: by "script" I really mean the .pc files that various apps install

[xiota]

I use whatever is provided by the package manager. Even on Debian, pkg-config is a dummy package that redirects to pkgconf. Fedora also does not appear to provide the original pkg-config.

Their stance doesn't seem particularly "aggressive" in context because they call out "passive-aggressive people who try to argue with us". Seems they probably had some people who opened numerous issues reporting closely related problems that they were told multiple times are not bugs. It would be like... what if someone opened multiple issues for Geany complaining that it doesn't support various Qt6 features despite being told multiple times that they aren't bugs? Eventually, those complaints could be considered intentionally disruptive, and people who "insist" on continuing need to be cut off.

[elextr]

Looks like it depends on gvfs... After uninstalling...

Well, IIUC GVFS is part of GIO (not to be confused with GnomeVFS), so if its uninstalled its not surprising parts of GIO don't work.

But that probably means reading URLs won't work on Windows, dunno about Macos, so back to the soup I guess :stuck_out_tongue_winking_eye:

[xiota]

It is separate from GIO. This is the project page: https://gitlab.gnome.org/GNOME/gvfs

Debian packages, appear to be gvfs and gvfs-backends.

Looks like msys2 and brew do not have gvfs.

[elextr]

Well, I interpret the very first words in the readme "GVfs is a userspace virtual filesystem implementation for GIO" to mean its part of GIO. IIUC it provides the implementations for the abstract file/URL/dbus stream operations in GIO and thats why you get an error if its not installed and you try to read anything other than a local file.

Never mind, its was worth a try, and thanks for writing that test program.

[xiota]

Someone could run the test program on windows or mac to find out. I no longer have (easy) access to either.

[b4n]

Yeah I guess using GIO directly for this kind of super simple GET would make sense Indeed. I also think that gvfs will indeed be part of all reasonable GIO installations, but I could be wrong.

[b4n]

hum… @elextr @xiota so what's your conclusion? Depend on libsoup3 as this PR because it's HTTP, or depend on a GVFS backend for HTTP?

[b4n]

Note that writing an async version of the feature, while reasonably easy, is a little bit more work.

[b4n]

See #1340 if wanted.

[elextr]

hum… @elextr @xiota so what's your conclusion? Depend on libsoup3 as this PR because it's HTTP, or depend on a GVFS backend for HTTP?

Waiting for https://github.com/geany/geany-plugins/pull/1340#issuecomment-2079741003

If it works ? #1340 : #1336

[b4n]

This PR won (IMO), so it's the one to review @frlan

[b4n]

I rebased this on master now #1342 is merged, as it has CI infrastructure changes for building with libsoup3. Apart from that it's unchanged from the previous version.

[b4n]

@frlan I think this should really land (or be rejected if need be) before 2.1 so we have libsoup3 support for every relevant plugin.

[eht16]

I'll test the CI installers in the next days when time permits.

[eht16]

Tested on Windows and works.