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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* GIO - GLib Input, Output and Streaming Library
*
* Copyright © 2022 Red Hat Inc.
*
* 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 2.1 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, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "genvironmentproxyresolver.h"
#include <glib.h>
#include <glib/gi18n-lib.h>
struct _GEnvironmentProxyResolver {
GObject parent_instance;
GProxyResolver *base_resolver;
};
static void g_environment_proxy_resolver_iface_init (GProxyResolverInterface *iface);
#ifdef GENVIRONMENTPROXY_MODULE
static void
g_environment_proxy_resolver_class_finalize (GEnvironmentProxyResolverClass *klass)
{
}
G_DEFINE_DYNAMIC_TYPE_EXTENDED (GEnvironmentProxyResolver,
g_environment_proxy_resolver,
G_TYPE_OBJECT, G_TYPE_FLAG_FINAL,
G_IMPLEMENT_INTERFACE_DYNAMIC (G_TYPE_PROXY_RESOLVER,
g_environment_proxy_resolver_iface_init))
#else
G_DEFINE_FINAL_TYPE_WITH_CODE (GEnvironmentProxyResolver,
g_environment_proxy_resolver,
G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_PROXY_RESOLVER,
g_environment_proxy_resolver_iface_init))
#endif
static gboolean
g_environment_proxy_resolver_is_supported (GProxyResolver *object)
{
return (g_getenv ("ftp_proxy") || g_getenv ("FTP_PROXY") ||
g_getenv ("https_proxy") || g_getenv ("HTTPS_PROXY") ||
g_getenv ("http_proxy") || g_getenv ("HTTP_PROXY") ||
g_getenv ("no_proxy") || g_getenv ("NO_PROXY"));
}
static GProxyResolver *
get_base_resolver (GProxyResolver *resolver)
{
return G_PROXY_RESOLVER (G_ENVIRONMENT_PROXY_RESOLVER (resolver)->base_resolver);
}
static gchar **
g_environment_proxy_resolver_lookup (GProxyResolver *resolver,
const gchar *uri,
GCancellable *cancellable,
GError **error)
{
return g_proxy_resolver_lookup (get_base_resolver (resolver), uri, cancellable, error);
}
static void
g_environment_proxy_resolver_lookup_async (GProxyResolver *resolver,
const gchar *uri,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_proxy_resolver_lookup_async (get_base_resolver (resolver), uri, cancellable, callback, user_data);
}
static gchar **
g_environment_proxy_resolver_lookup_finish (GProxyResolver *resolver,
GAsyncResult *result,
GError **error)
{
return g_proxy_resolver_lookup_finish (resolver, result, error);
}
static void
g_environment_proxy_resolver_finalize (GObject *object)
{
GEnvironmentProxyResolver *resolver = G_ENVIRONMENT_PROXY_RESOLVER (object);
g_object_unref (resolver->base_resolver);
G_OBJECT_CLASS (g_environment_proxy_resolver_parent_class)->finalize (object);
}
static const char *
validate_proxy_envvar (const char *var)
{
const char *url;
GError *error = NULL;
if ((url = g_getenv (var)))
{
/* Empty strings mean no proxy. */
if (*url == '\0')
return NULL;
if (g_uri_is_valid (url, G_URI_FLAGS_NONE, &error))
return url;
g_warning ("Environment variable %s specifies invalid proxy URL %s: %s", var, url, error->message);
g_error_free (error);
}
return NULL;
}
static void
g_environment_proxy_resolver_init (GEnvironmentProxyResolver *resolver)
{
char **ignore_hosts = NULL;
const char *default_proxy = NULL;
const char *url;
if (g_getenv ("no_proxy"))
ignore_hosts = g_strsplit (g_getenv ("no_proxy"), ",", -1);
else if (g_getenv ("NO_PROXY"))
ignore_hosts = g_strsplit (g_getenv ("NO_PROXY"), ",", -1);
/* The http_proxy/HTTP_PROXY is used for *all* protocols (except FTP or HTTPS,
* if more specific environment variables are set). It is not just for HTTP.
* This matches the behavior of libproxy's environment variable module, or
* GNOME's use-same-proxy setting.
*/
if ((url = validate_proxy_envvar ("http_proxy")))
default_proxy = url;
else if ((url = validate_proxy_envvar ("HTTP_PROXY")))
default_proxy = url;
resolver->base_resolver = g_simple_proxy_resolver_new (default_proxy, ignore_hosts);
g_strfreev (ignore_hosts);
if ((url = validate_proxy_envvar ("ftp_proxy")))
g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver->base_resolver), "ftp", url);
else if ((url = validate_proxy_envvar ("FTP_PROXY")))
g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver->base_resolver), "ftp", url);
if ((url = validate_proxy_envvar ("https_proxy")))
g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver->base_resolver), "https", url);
else if ((url = validate_proxy_envvar ("HTTPS_PROXY")))
g_simple_proxy_resolver_set_uri_proxy (G_SIMPLE_PROXY_RESOLVER (resolver->base_resolver), "https", url);
}
static void
g_environment_proxy_resolver_class_init (GEnvironmentProxyResolverClass *resolver_class)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (resolver_class);
object_class->finalize = g_environment_proxy_resolver_finalize;
}
static void
g_environment_proxy_resolver_iface_init (GProxyResolverInterface *iface)
{
iface->is_supported = g_environment_proxy_resolver_is_supported;
iface->lookup = g_environment_proxy_resolver_lookup;
iface->lookup_async = g_environment_proxy_resolver_lookup_async;
iface->lookup_finish = g_environment_proxy_resolver_lookup_finish;
}
#ifdef GENVIRONMENTPROXY_MODULE
void
g_environment_proxy_resolver_register (GIOModule *module)
{
g_environment_proxy_resolver_register_type (G_TYPE_MODULE (module));
if (!module)
g_io_extension_point_register (G_PROXY_RESOLVER_EXTENSION_POINT_NAME);
g_io_extension_point_implement (G_PROXY_RESOLVER_EXTENSION_POINT_NAME,
g_environment_proxy_resolver_get_type(),
"environment",
0);
}
#endif
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