src/core/sipe-mime.c

   1 /**
   2  * @file sipe-mime.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010-2017 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 #if !GMIME_CHECK_VERSION(2,6,0)
  45 #error GMime >= 2.6.0 is required to build SIPE
  46 #endif
  47
  48 #if !GMIME_CHECK_VERSION(3,0,0)
  49 #define g_mime_part_get_content(p)         g_mime_part_get_content_object(p)
  50 #define g_mime_parser_construct_part(p, o) g_mime_parser_construct_part(p)
  51 #endif
  52
  53 #include "sipe-mime.h"
  54
  55 #include "sipe-backend.h"
  56 #include "sipe-utils.h"
  57
  58 void sipe_mime_init(void)
  59 {
  60         g_mime_init(
  61 #if !GMIME_CHECK_VERSION(3,0,0)
  62                 0
  63 #endif
  64         );
  65 }
  66
  67 void sipe_mime_shutdown(void)
  68 {
  69         g_mime_shutdown();
  70 }
  71
  72 struct gmime_callback_data {
  73         sipe_mime_parts_cb callback;
  74         gpointer user_data;
  75 };
  76
  77 static GSList *gmime_fields_to_nameval(GMimeObject *part)
  78 {
  79         GMimeHeaderList *headers = g_mime_object_get_header_list(part);
  80         GSList *fields = NULL;
  81 #if GMIME_CHECK_VERSION(3,0,0)
  82         guint count = g_mime_header_list_get_count(headers);
  83         guint index;
  84
  85         for (index = 0; index < count; index++) {
  86                 GMimeHeader *header = g_mime_header_list_get_header_at(headers,
  87                                                                        index);
  88                 fields = sipe_utils_nameval_add(fields,
  89                                                 g_mime_header_get_name(header),
  90                                                 g_mime_header_get_value(header));
  91         }
  92 #else
  93         GMimeHeaderIter *iter = g_mime_header_iter_new();
  94
  95         if (g_mime_header_list_get_iter(headers, iter)) {
  96                 do {
  97                         fields = sipe_utils_nameval_add(fields,
  98                                                         g_mime_header_iter_get_name(iter),
  99                                                         g_mime_header_iter_get_value(iter));
 100                 } while (g_mime_header_iter_next(iter));
 101         }
 102         g_mime_header_iter_free(iter);
 103 #endif
 104
 105         return fields;
 106 }
 107
 108 static void gmime_callback(SIPE_UNUSED_PARAMETER GMimeObject *parent,
 109                            GMimeObject *part,
 110                            gpointer user_data)
 111 {
 112         GMimeDataWrapper *data = g_mime_part_get_content((GMimePart *)part);
 113
 114         if (data) {
 115                 GMimeStream *stream = g_mime_data_wrapper_get_stream(data);
 116
 117                 if (stream) {
 118                         ssize_t length = 0;
 119                         const char *encoding;
 120                         gchar *buffer;
 121                         GString *content;
 122
 123                         encoding = g_mime_object_get_header(part,
 124                                         "Content-Transfer-Encoding");
 125                         if (encoding) {
 126                                 GMimeFilter *filter = g_mime_filter_basic_new(
 127                                                 g_mime_content_encoding_from_string(encoding), FALSE);
 128                                 stream = g_mime_stream_filter_new (stream);
 129                                 g_mime_stream_filter_add(GMIME_STREAM_FILTER(stream), filter);
 130                                 g_object_unref (filter);
 131                         }
 132
 133                         /* g_mime_stream_read() might not read everything in one call */
 134                         content = g_string_new(NULL);
 135                         buffer = g_malloc(4096);
 136                         while ((length = g_mime_stream_read(stream, buffer, 4096)) > 0) {
 137                                 g_string_append_len(content, buffer, length);
 138                         }
 139                         g_free(buffer);
 140
 141                         if (length == 0) {
 142                                 struct gmime_callback_data *cd = user_data;
 143                                 GSList *fields = gmime_fields_to_nameval(part);
 144
 145                                 cd->callback(cd->user_data, fields,
 146                                                 content->str, content->len);
 147
 148                                 sipe_utils_nameval_free(fields);
 149                         }
 150
 151                         g_string_free(content, TRUE);
 152
 153                         if (encoding) {
 154                                 // Unref GMimeStreamFilter wrapping GMimeStream.
 155                                 g_object_unref(stream);
 156                         }
 157                 }
 158         }
 159 }
 160
 161 void sipe_mime_parts_foreach(const gchar *type,
 162                              const gchar *body,
 163                              sipe_mime_parts_cb callback,
 164                              gpointer user_data)
 165 {
 166         gchar *doc = g_strdup_printf("Content-Type: %s\r\n\r\n%s", type, body);
 167         GMimeStream *stream = g_mime_stream_mem_new_with_buffer(doc, strlen(doc));
 168
 169         if (stream) {
 170                 GMimeParser *parser = g_mime_parser_new_with_stream(stream);
 171                 GMimeMultipart *multipart = (GMimeMultipart *)g_mime_parser_construct_part(parser,
 172                                                                                            NULL);
 173
 174                 if (multipart) {
 175                         struct gmime_callback_data cd = {callback, user_data};
 176
 177                         SIPE_DEBUG_INFO("sipe_mime_parts_foreach: %d parts", g_mime_multipart_get_count(multipart));
 178
 179                         g_mime_multipart_foreach(multipart, gmime_callback, &cd);
 180                         g_object_unref(multipart);
 181                 }
 182
 183                 g_object_unref(parser);
 184                 g_object_unref(stream);
 185         }
 186         g_free(doc);
 187 }
 188
 189 /*
 190   Local Variables:
 191   mode: c
 192   c-file-style: "bsd"
 193   indent-tabs-mode: t
 194   tab-width: 8
 195   End:
 196 */