path: root/e-util/e-file-request.c

/*
 * e-file-request.c
 *
 * This program 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) version 3.
 *
 * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
 *
 */

#define LIBSOUP_USE_UNSTABLE_REQUEST_API

#include "e-file-request.h"

#include <libsoup/soup.h>

#include <string.h>

#define d(x)

#define E_FILE_REQUEST_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_FILE_REQUEST, EFileRequestPrivate))

struct _EFileRequestPrivate {
    gchar *content_type;
    gint content_length;
};

G_DEFINE_TYPE (EFileRequest, e_file_request, SOUP_TYPE_REQUEST)

static void
handle_file_request (GSimpleAsyncResult *res,
                     GObject *object,
                     GCancellable *cancellable)
{
    EFileRequest *request = E_FILE_REQUEST (object);
    SoupURI *uri;
    GInputStream *stream;
    gchar *contents;
    gsize length;

    if (g_cancellable_is_cancelled (cancellable))
        return;

    uri = soup_request_get_uri (SOUP_REQUEST (request));

    if (g_file_get_contents (uri->path, &contents, &length, NULL)) {

        request->priv->content_type =
            g_content_type_guess (uri->path, NULL, 0, NULL);
        request->priv->content_length = length;

        stream = g_memory_input_stream_new_from_data (
                contents, length, (GDestroyNotify) g_free);
        g_simple_async_result_set_op_res_gpointer (res, stream, NULL);
    }
}

static void
file_request_finalize (GObject *object)
{
    EFileRequest *request = E_FILE_REQUEST (object);

    if (request->priv->content_type) {
        g_free (request->priv->content_type);
        request->priv->content_type = NULL;
    }

    G_OBJECT_CLASS (e_file_request_parent_class)->finalize (object);
}

static gboolean
file_request_check_uri (SoupRequest *request,
                       SoupURI *uri,
                       GError **error)
{
    return (strcmp (uri->scheme, "evo-file") == 0);
}

static void
file_request_send_async (SoupRequest *request,
                         GCancellable *cancellable,
                         GAsyncReadyCallback callback,
                         gpointer user_data)
{
    GSimpleAsyncResult *simple;

    d (printf ("received request for %s\n", soup_uri_to_string (uri, FALSE)));

    /* WebKit won't allow us to load data through local file:// protocol
     * when using "remote" mail:// protocol, so we have evo-file://
     * which WebKit thinks it's remote, but in fact it behaves like
     * oridnary file:// */

    simple = g_simple_async_result_new (
        G_OBJECT (request), callback, user_data,
        file_request_send_async);

    g_simple_async_result_set_check_cancellable (simple, cancellable);

    g_simple_async_result_run_in_thread (
        simple, handle_file_request,
        G_PRIORITY_DEFAULT, cancellable);

    g_object_unref (simple);
}

static GInputStream *
file_request_send_finish (SoupRequest *request,
                          GAsyncResult *result,
                          GError **error)
{
    GSimpleAsyncResult *simple;
    GInputStream *stream;

    simple = G_SIMPLE_ASYNC_RESULT (result);
    stream = g_simple_async_result_get_op_res_gpointer (simple);

    /* Reset the stream before passing it back to webkit */
    if (stream && G_IS_SEEKABLE (stream))
        g_seekable_seek (G_SEEKABLE (stream), 0, G_SEEK_SET, NULL, NULL);

    if (!stream) /* We must always return something */
        stream = g_memory_input_stream_new ();

    return stream;
}

static goffset
file_request_get_content_length (SoupRequest *request)
{
    EFileRequest *efr = E_FILE_REQUEST (request);

    d (printf ("Content-Length: %d bytes\n", efr->priv->content_length));

    return efr->priv->content_length;
}

static const gchar *
file_request_get_content_type (SoupRequest *request)
{
    EFileRequest *efr = E_FILE_REQUEST (request);

    d (printf ("Content-Type: %s\n", efr->priv->content_type));

    return efr->priv->content_type;
}

static const gchar *data_schemes[] = { "evo-file", NULL };

static void
e_file_request_class_init (EFileRequestClass *class)
{
    GObjectClass *object_class;
    SoupRequestClass *request_class;

    g_type_class_add_private (class, sizeof (EFileRequestPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->finalize = file_request_finalize;

    request_class = SOUP_REQUEST_CLASS (class);
    request_class->schemes = data_schemes;
    request_class->send_async = file_request_send_async;
    request_class->send_finish = file_request_send_finish;
    request_class->get_content_type = file_request_get_content_type;
    request_class->get_content_length = file_request_get_content_length;
    request_class->check_uri = file_request_check_uri;
}

static void
e_file_request_init (EFileRequest *request)
{
    request->priv = E_FILE_REQUEST_GET_PRIVATE (request);
}