libcurl backend

For rpm-ostree, we already link to libcurl indirectly via librepo, and
only having one HTTP library in process makes sense.

Further, libcurl is (I think) more popular in the embedded space.  It
also supports HTTP/2.0 today, which is a *very* nice to have for OSTree.

This seems to be working fairly well for me in my local testing, but it's
obviously brand new nontrivial code, so it's going to need some soak time.

The ugliest part of this is having to vendor in the soup-url code. With
Oxidation we could follow the path of Firefox and use the
[Servo URL parser](https://github.com/servo/rust-url).  Having to redo
cookie parsing also sucked, and that would also be a good oxidation target.

But that's for the future.

Closes: #641
Approved by: jlebon

1 files changed, 118 insertions, 0 deletions

diff --git a/src/libostree/ostree-fetcher-uri.c b/src/libostree/ostree-fetcher-uri.c
new file mode 100644
index 00000000..7ef42eca
--- /dev/null
+++ b/src/libostree/ostree-fetcher-uri.c
@@ -0,0 +1,118 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2011,2017 Colin Walters <walters@verbum.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Colin Walters <walters@verbum.org>
+ */
+
+#include "config.h"
+
+
+#ifdef HAVE_LIBCURL
+#include "ostree-soup-uri.h"
+#else
+#define LIBSOUP_USE_UNSTABLE_REQUEST_API
+#include <libsoup/soup.h>
+#include <libsoup/soup-requester.h>
+#include <libsoup/soup-request-http.h>
+#endif
+
+#include "ostree-fetcher.h"
+
+#include "libglnx.h"
+
+void
+_ostree_fetcher_uri_free (OstreeFetcherURI *uri)
+{
+  if (uri)
+    soup_uri_free ((SoupURI*)uri);
+}
+
+OstreeFetcherURI *
+_ostree_fetcher_uri_parse (const char       *str,
+                           GError          **error)
+{
+  SoupURI *soupuri = soup_uri_new (str);
+  if (soupuri == NULL)
+    {
+      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                   "Failed to parse uri: %s", str);
+      return NULL;
+    }
+  return (OstreeFetcherURI*)soupuri;
+}
+
+static OstreeFetcherURI *
+_ostree_fetcher_uri_new_path_internal (OstreeFetcherURI *uri,
+                                       gboolean          extend,
+                                       const char       *path)
+{
+  SoupURI *newuri = soup_uri_copy ((SoupURI*)uri);
+  if (path)
+    {
+      if (extend)
+        {
+          const char *origpath = soup_uri_get_path ((SoupURI*)uri);
+          g_autofree char *newpath = g_build_filename (origpath, path, NULL);
+          soup_uri_set_path (newuri, newpath);
+        }
+      else
+        {
+          soup_uri_set_path (newuri, path);
+        }
+    }
+  return (OstreeFetcherURI*)newuri;
+}
+
+OstreeFetcherURI *
+_ostree_fetcher_uri_new_path (OstreeFetcherURI *uri,
+                              const char       *path)
+{
+  return _ostree_fetcher_uri_new_path_internal (uri, FALSE, path);
+}
+
+OstreeFetcherURI *
+_ostree_fetcher_uri_new_subpath (OstreeFetcherURI *uri,
+                                 const char       *subpath)
+{
+  return _ostree_fetcher_uri_new_path_internal (uri, TRUE, subpath);
+}
+
+OstreeFetcherURI *
+_ostree_fetcher_uri_clone (OstreeFetcherURI *uri)
+{
+  return _ostree_fetcher_uri_new_subpath (uri, NULL);
+}
+
+char *
+_ostree_fetcher_uri_get_scheme (OstreeFetcherURI *uri)
+{
+  return g_strdup (soup_uri_get_scheme ((SoupURI*)uri));
+}
+
+char *
+_ostree_fetcher_uri_get_path (OstreeFetcherURI *uri)
+{
+  return g_strdup (soup_uri_get_path ((SoupURI*)uri));
+}
+
+char *
+_ostree_fetcher_uri_to_string (OstreeFetcherURI *uri)
+{
+  return soup_uri_to_string ((SoupURI*)uri, FALSE);
+}