path: root/mail/e-mail-request.c

/*
 * e-mail-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-mail-request.h"

#include <libsoup/soup.h>
#include <libsoup/soup-requester.h>
#include <libsoup/soup-request-http.h>

#include <glib/gi18n.h>
#include <camel/camel.h>

#include "em-format-html.h"

#include <e-util/e-icon-factory.h>
#include <e-util/e-util.h>

#define d(x)
#define dd(x)

#define E_MAIL_REQUEST_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_MAIL_REQUEST, EMailRequestPrivate))

struct _EMailRequestPrivate {
    EMFormatHTML *efh;

    CamelStream *output_stream;
    EMFormatPURI *puri;
    gchar *mime_type;

    gint content_length;

    GHashTable *uri_query;

        gchar *ret_mime_type;
};

G_DEFINE_TYPE (EMailRequest, e_mail_request, SOUP_TYPE_REQUEST)

static void
handle_mail_request (GSimpleAsyncResult *res,
                     GObject *object,
                     GCancellable *cancellable)
{
    EMailRequest *request = E_MAIL_REQUEST (object);
    EMFormatHTML *efh = request->priv->efh;
    EMFormat *emf = EM_FORMAT (efh);
    GInputStream *stream;
    GByteArray *ba;
    gchar *part_id;
    EMFormatWriterInfo info = {0};
    gchar *val;

    if (g_cancellable_is_cancelled (cancellable))
        return;

    if (request->priv->output_stream != NULL) {
        g_object_unref (request->priv->output_stream);
    }

    request->priv->output_stream = camel_stream_mem_new ();

    val = g_hash_table_lookup (request->priv->uri_query, "headers_collapsed");
    if (val)
        info.headers_collapsed = atoi (val);

    val = g_hash_table_lookup (request->priv->uri_query, "headers_collapsable");
    if (val)
        info.headers_collapsable = atoi (val);

    val = g_hash_table_lookup (request->priv->uri_query, "mode");
    if (val)
        info.mode = atoi (val);

    part_id = g_hash_table_lookup (request->priv->uri_query, "part_id");
    if (part_id) {
        /* original part_id is owned by the GHashTable */
        part_id = soup_uri_decode (part_id);
        request->priv->puri = em_format_find_puri (emf, part_id);

        if (request->priv->puri) {
            em_format_puri_write (request->priv->puri,
                request->priv->output_stream, &info, cancellable);
        } else {
            g_warning ("Failed to lookup requested part '%s' - this should not happen!", part_id);
        }

        g_free (part_id);
    } else {
        if (info.mode == 0)
            info.mode = EM_FORMAT_WRITE_MODE_NORMAL;

        em_format_write (emf, request->priv->output_stream, &info, cancellable);
    }

    /* Convert the GString to GInputStream and send it back to WebKit */
    ba = camel_stream_mem_get_byte_array (CAMEL_STREAM_MEM (request->priv->output_stream));
    if (!ba->data) {
        gchar *data = g_strdup_printf(_("Failed to load part '%s'"), part_id);
        dd(printf("%s", data));
        g_byte_array_append (ba, (guchar *) data, strlen (data));
        g_free (data);
    } else {
        dd ({
            gchar *d = g_strndup ((gchar *) ba->data, ba->len);
            printf("%s", d);
            g_free (d);
        });
    }

    stream = g_memory_input_stream_new_from_data (
            (gchar *) ba->data, ba->len, NULL);
    g_simple_async_result_set_op_res_gpointer (res, stream, NULL);
}

static void
mail_request_finalize (GObject *object)
{
    EMailRequest *request = E_MAIL_REQUEST (object);

    if (request->priv->output_stream) {
        g_object_unref (request->priv->output_stream);
        request->priv->output_stream = NULL;
    }

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

    if (request->priv->uri_query) {
        g_hash_table_destroy (request->priv->uri_query);
        request->priv->uri_query = NULL;
    }

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

    if (request->priv->efh) {
        g_object_unref (request->priv->efh);
        request->priv->efh = NULL;
    }

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

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

static void
mail_request_send_async (SoupRequest *request,
                         GCancellable *cancellable,
                         GAsyncReadyCallback callback,
                         gpointer user_data)
{
    SoupSession *session;
    EMailRequest *emr = E_MAIL_REQUEST (request);
    GSimpleAsyncResult *simple;
    SoupURI *uri;
    GHashTable *formatters;
    gchar *uri_str;

    session = soup_request_get_session (request);
    uri = soup_request_get_uri (request);

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

    if (uri->query) {
        emr->priv->uri_query = soup_form_decode (uri->query);
    } else {
        emr->priv->uri_query = NULL;
    }

    formatters = g_object_get_data (G_OBJECT (session), "formatters");
                    g_return_if_fail (formatters != NULL);

    uri_str = g_strdup_printf (
        "%s://%s%s", uri->scheme, uri->host, uri->path);
    emr->priv->efh = g_hash_table_lookup (formatters, uri_str);
    g_free (uri_str);

    g_return_if_fail (emr->priv->efh);

    /* Make sure the formatter lives until we are finished here */
    g_object_ref (emr->priv->efh);

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

    g_simple_async_result_set_check_cancellable (simple, cancellable);

    g_simple_async_result_run_in_thread (
        simple, handle_mail_request,
        G_PRIORITY_DEFAULT, cancellable);

    g_object_unref (simple);
}

static GInputStream *
mail_request_send_finish (SoupRequest *request,
                          GAsyncResult *result,
                          GError **error)
{
    GInputStream *stream;

    stream = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (result));

    /* 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
mail_request_get_content_length (SoupRequest *request)
{
    EMailRequest *emr = E_MAIL_REQUEST (request);
    GByteArray *ba;
    gint content_length = 0;

    if (emr->priv->content_length > 0)
        content_length = emr->priv->content_length;
    else if (emr->priv->output_stream) {
        ba = camel_stream_mem_get_byte_array (CAMEL_STREAM_MEM (emr->priv->output_stream));
        if (ba) {
            content_length = ba->len;
        }
    }

    d(printf("Content-Length: %d bytes\n", content_length));
    return content_length;
}

static const gchar *
mail_request_get_content_type (SoupRequest *request)
{
    EMailRequest *emr = E_MAIL_REQUEST (request);
    gchar *mime_type;

    if (emr->priv->mime_type) {
        mime_type = g_strdup (emr->priv->mime_type);
    } else if (!emr->priv->puri) {
        mime_type = g_strdup ("text/html");
    } else if (!emr->priv->puri->mime_type) {
        CamelContentType *ct = camel_mime_part_get_content_type (emr->priv->puri->part);
        mime_type = camel_content_type_simple (ct);
    } else {
        mime_type = g_strdup (emr->priv->puri->mime_type);
    }

    if (g_strcmp0 (mime_type, "text/html") == 0) {
        emr->priv->ret_mime_type = g_strconcat (mime_type, "; charset=\"UTF-8\"", NULL);
        g_free (mime_type);
    } else {
        emr->priv->ret_mime_type = mime_type;
    }

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

    return emr->priv->ret_mime_type;
}

static const char *data_schemes[] = { "mail", NULL };

static void
e_mail_request_class_init (EMailRequestClass *class)
{
    GObjectClass *object_class;
    SoupRequestClass *request_class;

    g_type_class_add_private (class, sizeof (EMailRequestPrivate));

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

    request_class = SOUP_REQUEST_CLASS (class);
    request_class->schemes = data_schemes;
    request_class->send_async = mail_request_send_async;
    request_class->send_finish = mail_request_send_finish;
    request_class->get_content_type = mail_request_get_content_type;
    request_class->get_content_length = mail_request_get_content_length;
    request_class->check_uri = mail_request_check_uri;
}

static void
e_mail_request_init (EMailRequest *request)
{
    request->priv = E_MAIL_REQUEST_GET_PRIVATE (request);
}