src/core/sipe-mime.c

   1 /**
   2  * @file sipe-mime.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010-2016 SIPE Project <http://sipe.sourceforge.net/>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <string.h>
  24
  25 #include "sipe-common.h"
  26
  27 #include <glib.h>
  28
  29 /*
  30  * GMIME interfaces fail to compile on ARM architecture with -Wcast-align
  31  *
  32  * Diagnostic #pragma was added in GCC 4.2.0
  33  */
  34 #if defined(__GNUC__)
  35 #if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2)) || (__GNUC__ >= 5)
  36 #if defined(__ARMEL__) || defined(__ARMEB__) || defined(__mips__) || defined(__sparc__) || (defined(__powerpc__) && defined(__NO_FPRS__))
  37 #pragma GCC diagnostic ignored "-Wcast-align"
  38 #endif
  39 #endif
  40 #endif
  41
  42 #include <gmime/gmime.h>
  43
  44 #include "sipe-mime.h"
  45
  46 #include "sipe-backend.h"
  47 #include "sipe-utils.h"
  48
  49 void sipe_mime_init(void)
  50 {
  51         g_mime_init(0);
  52 }
  53
  54 void sipe_mime_shutdown(void)
  55 {
  56         g_mime_shutdown();
  57 }
  58
  59 struct gmime_callback_data {
  60         sipe_mime_parts_cb callback;
  61         gpointer user_data;
  62 };
  63
  64 static GSList *gmime_fields_to_nameval(GMimeObject *part)
  65 {
  66         GMimeHeaderList *headers = g_mime_object_get_header_list(part);
  67         GMimeHeaderIter *iter = g_mime_header_iter_new();
  68         GSList *fields = NULL;
  69
  70         if (g_mime_header_list_get_iter(headers, iter)) {
  71                 do {
  72                         fields = sipe_utils_nameval_add(fields,
  73                                                         g_mime_header_iter_get_name(iter),
  74                                                         g_mime_header_iter_get_value(iter));
  75
  76                 } while (g_mime_header_iter_next(iter));
  77         }
  78         g_mime_header_iter_free(iter);
  79
  80         return fields;
  81 }
  82
  83 static void gmime_callback(SIPE_UNUSED_PARAMETER GMimeObject *parent,
  84                            GMimeObject *part,
  85                            gpointer user_data)
  86 {
  87         GMimeDataWrapper *data = g_mime_part_get_content_object((GMimePart *)part);
  88
  89         if (data) {
  90                 GMimeStream *stream = g_mime_data_wrapper_get_stream(data);
  91
  92                 if (stream) {
  93                         ssize_t length = 0;
  94                         const char *encoding;
  95                         gchar *buffer;
  96                         GString *content;
  97
  98                         encoding = g_mime_object_get_header(part,
  99                                         "Content-Transfer-Encoding");
 100                         if (encoding) {
 101                                 GMimeFilter *filter = g_mime_filter_basic_new(
 102                                                 g_mime_content_encoding_from_string(encoding), FALSE);
 103                                 stream = g_mime_stream_filter_new (stream);
 104                                 g_mime_stream_filter_add(GMIME_STREAM_FILTER(stream), filter);
 105                                 g_object_unref (filter);
 106                         }
 107
 108                         /* g_mime_stream_read() might not read everything in one call */
 109                         content = g_string_new(NULL);
 110                         buffer = g_malloc(4096);
 111                         while ((length = g_mime_stream_read(stream, buffer, 4096)) > 0) {
 112                                 g_string_append_len(content, buffer, length);
 113                         }
 114                         g_free(buffer);
 115
 116                         if (length == 0) {
 117                                 struct gmime_callback_data *cd = user_data;
 118                                 GSList *fields = gmime_fields_to_nameval(part);
 119
 120                                 cd->callback(cd->user_data, fields,
 121                                                 content->str, content->len);
 122
 123                                 sipe_utils_nameval_free(fields);
 124                         }
 125
 126                         g_string_free(content, TRUE);
 127
 128                         if (encoding) {
 129                                 // Unref GMimeStreamFilter wrapping GMimeStream.
 130                                 g_object_unref(stream);
 131                         }
 132                 }
 133         }
 134 }
 135
 136 void sipe_mime_parts_foreach(const gchar *type,
 137                              const gchar *body,
 138                              sipe_mime_parts_cb callback,
 139                              gpointer user_data)
 140 {
 141         gchar *doc = g_strdup_printf("Content-Type: %s\r\n\r\n%s", type, body);
 142         GMimeStream *stream = g_mime_stream_mem_new_with_buffer(doc, strlen(doc));
 143
 144         if (stream) {
 145                 GMimeParser *parser = g_mime_parser_new_with_stream(stream);
 146                 GMimeMultipart *multipart = (GMimeMultipart *)g_mime_parser_construct_part(parser);
 147
 148                 if (multipart) {
 149                         struct gmime_callback_data cd = {callback, user_data};
 150
 151                         SIPE_DEBUG_INFO("sipe_mime_parts_foreach: %d parts", g_mime_multipart_get_count(multipart));
 152
 153                         g_mime_multipart_foreach(multipart, gmime_callback, &cd);
 154                         g_object_unref(multipart);
 155                 }
 156
 157                 g_object_unref(parser);
 158                 g_object_unref(stream);
 159         }
 160         g_free(doc);
 161 }
 162
 163 /*
 164   Local Variables:
 165   mode: c
 166   c-file-style: "bsd"
 167   indent-tabs-mode: t
 168   tab-width: 8
 169   End:
 170 */