src/recv.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31
  32 #ifdef G_OS_WIN32
  33 #include "w32lib.h"
  34 #else
  35 #include <sys/time.h>
  36 #endif
  37
  38 #include "recv.h"
  39 #include "socket.h"
  40 #include "utils.h"
  41
  42 static RecvUIFunc       recv_ui_func;
  43 static gpointer         recv_ui_func_data;
  44
  45 gint recv_write_to_file(SockInfo *sock, const gchar *filename)
  46 {
  47         FILE *fp;
  48         gint ret;
  49
  50         g_return_val_if_fail(filename != NULL, -1);
  51
  52         if ((fp = g_fopen(filename, "wb")) == NULL) {
  53                 FILE_OP_ERROR(filename, "fopen");
  54                 recv_write(sock, NULL);
  55                 return -1;
  56         }
  57
  58         if (change_file_mode_rw(fp, filename) < 0)
  59                 FILE_OP_ERROR(filename, "chmod");
  60
  61         if ((ret = recv_write(sock, fp)) < 0) {
  62                 fclose(fp);
  63                 g_unlink(filename);
  64                 return ret;
  65         }
  66
  67         if (fclose(fp) == EOF) {
  68                 FILE_OP_ERROR(filename, "fclose");
  69                 g_unlink(filename);
  70                 return -1;
  71         }
  72
  73         return 0;
  74 }
  75
  76 gint recv_bytes_write_to_file(SockInfo *sock, glong size, const gchar *filename)
  77 {
  78         FILE *fp;
  79         gint ret;
  80
  81         g_return_val_if_fail(filename != NULL, -1);
  82
  83         if ((fp = g_fopen(filename, "wb")) == NULL) {
  84                 FILE_OP_ERROR(filename, "fopen");
  85                 recv_write(sock, NULL);
  86                 return -1;
  87         }
  88
  89         if (change_file_mode_rw(fp, filename) < 0)
  90                 FILE_OP_ERROR(filename, "chmod");
  91
  92         if ((ret = recv_bytes_write(sock, size, fp)) < 0) {
  93                 fclose(fp);
  94                 g_unlink(filename);
  95                 return ret;
  96         }
  97
  98         if (fclose(fp) == EOF) {
  99                 FILE_OP_ERROR(filename, "fclose");
 100                 g_unlink(filename);
 101                 return -1;
 102         }
 103
 104         return 0;
 105 }
 106
 107 gint recv_write(SockInfo *sock, FILE *fp)
 108 {
 109         gchar buf[BUFFSIZE];
 110         gint len;
 111         gint count = 0;
 112         gint bytes = 0;
 113         struct timeval tv_prev, tv_cur;
 114
 115         gettimeofday(&tv_prev, NULL);
 116
 117         for (;;) {
 118                 if (sock_gets(sock, buf, sizeof(buf)) < 0) {
 119                         g_warning("error occurred while retrieving data.\n");
 120                         return -2;
 121                 }
 122
 123                 len = strlen(buf);
 124                 if (len > 1 && buf[0] == '.' && buf[1] == '\r') {
 125                         if (recv_ui_func)
 126                                 recv_ui_func(sock, count, bytes,
 127                                              recv_ui_func_data);
 128                         break;
 129                 }
 130                 count++;
 131                 bytes += len;
 132
 133                 if (recv_ui_func) {
 134                         gettimeofday(&tv_cur, NULL);
 135                         /* if elapsed time from previous update is greater
 136                            than 50msec, update UI */
 137                         if (tv_cur.tv_sec - tv_prev.tv_sec > 0 ||
 138                             tv_cur.tv_usec - tv_prev.tv_usec > UI_REFRESH_INTERVAL) {
 139                                 gboolean ret;
 140                                 ret = recv_ui_func(sock, count, bytes,
 141                                                    recv_ui_func_data);
 142                                 if (ret == FALSE) return -1;
 143                                 gettimeofday(&tv_prev, NULL);
 144                         }
 145                 }
 146
 147                 if (len > 1 && buf[len - 1] == '\n' && buf[len - 2] == '\r') {
 148                         buf[len - 2] = '\n';
 149                         buf[len - 1] = '\0';
 150                         len--;
 151                 }
 152
 153                 if (buf[0] == '.' && buf[1] == '.')
 154                         memmove(buf, buf + 1, len--);
 155
 156                 if (!strncmp(buf, ">From ", 6))
 157                         memmove(buf, buf + 1, len--);
 158
 159                 if (fp && fputs(buf, fp) == EOF) {
 160                         perror("fputs");
 161                         g_warning("Can't write to file.\n");
 162                         fp = NULL;
 163                 }
 164         }
 165
 166         if (!fp) return -1;
 167
 168         return 0;
 169 }
 170
 171 gint recv_bytes_write(SockInfo *sock, glong size, FILE *fp)
 172 {
 173         gchar *buf;
 174         glong count = 0;
 175         gchar *prev, *cur;
 176
 177         if (size == 0)
 178                 return 0;
 179
 180         buf = g_malloc(size);
 181
 182         do {
 183                 gint read_count;
 184
 185                 read_count = sock_read(sock, buf + count, size - count);
 186                 if (read_count < 0) {
 187                         g_free(buf);
 188                         return -2;
 189                 }
 190                 count += read_count;
 191         } while (count < size);
 192
 193         /* +------------------+----------------+--------------------------+ *
 194          * ^buf               ^prev            ^cur             buf+size-1^ */
 195
 196         prev = buf;
 197         while ((cur = memchr(prev, '\r', size - (prev - buf))) != NULL) {
 198                 if (cur == buf + size - 1) break;
 199
 200                 if (fwrite(prev, sizeof(gchar), cur - prev, fp) == EOF ||
 201                     fwrite("\n", sizeof(gchar), 1, fp) == EOF) {
 202                         perror("fwrite");
 203                         g_warning("Can't write to file.\n");
 204                         g_free(buf);
 205                         return -1;
 206                 }
 207
 208                 if (*(cur + 1) == '\n')
 209                         prev = cur + 2;
 210                 else
 211                         prev = cur + 1;
 212
 213                 if (prev - buf >= size) break;
 214         }
 215
 216         if (prev - buf < size && fwrite(buf, sizeof(gchar),
 217                                         size - (prev - buf), fp) == EOF) {
 218                 perror("fwrite");
 219                 g_warning("Can't write to file.\n");
 220                 g_free(buf);
 221                 return -1;
 222         }
 223
 224         g_free(buf);
 225         return 0;
 226 }
 227
 228 void recv_set_ui_func(RecvUIFunc func, gpointer data)
 229 {
 230         recv_ui_func = func;
 231         recv_ui_func_data = data;
 232 }