59712bbc18
* src/news.c * src/procheader.c * src/unmime.c Better fix for \n's in headers (don't break Received: and others)
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
|
|
* Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
|
|
* Copyright (C) 1999-2006 Hiroyuki Yamamoto and the Sylpheed-Claws team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
#include "codeconv.h"
|
|
#include "base64.h"
|
|
#include "quoted-printable.h"
|
|
|
|
#define ENCODED_WORD_BEGIN "=?"
|
|
#define ENCODED_WORD_END "?="
|
|
|
|
/* Decodes headers based on RFC2045 and RFC2047. */
|
|
|
|
gchar *unmime_header(const gchar *encoded_str)
|
|
{
|
|
const gchar *p = encoded_str;
|
|
const gchar *eword_begin_p, *encoding_begin_p, *text_begin_p,
|
|
*eword_end_p;
|
|
gchar charset[32];
|
|
gchar encoding;
|
|
gchar *conv_str;
|
|
GString *outbuf;
|
|
gchar *out_str;
|
|
gsize out_len;
|
|
|
|
outbuf = g_string_sized_new(strlen(encoded_str) * 2);
|
|
|
|
while (*p != '\0') {
|
|
gchar *decoded_text = NULL;
|
|
gint len;
|
|
|
|
eword_begin_p = strstr(p, ENCODED_WORD_BEGIN);
|
|
if (!eword_begin_p) {
|
|
g_string_append(outbuf, p);
|
|
break;
|
|
}
|
|
encoding_begin_p = strchr(eword_begin_p + 2, '?');
|
|
if (!encoding_begin_p) {
|
|
g_string_append(outbuf, p);
|
|
break;
|
|
}
|
|
text_begin_p = strchr(encoding_begin_p + 1, '?');
|
|
if (!text_begin_p) {
|
|
g_string_append(outbuf, p);
|
|
break;
|
|
}
|
|
eword_end_p = strstr(text_begin_p + 1, ENCODED_WORD_END);
|
|
if (!eword_end_p) {
|
|
g_string_append(outbuf, p);
|
|
break;
|
|
}
|
|
|
|
if (p == encoded_str) {
|
|
g_string_append_len(outbuf, p, eword_begin_p - p);
|
|
p = eword_begin_p;
|
|
} else {
|
|
/* ignore spaces between encoded words */
|
|
const gchar *sp;
|
|
|
|
for (sp = p; sp < eword_begin_p; sp++) {
|
|
if (!g_ascii_isspace(*sp)) {
|
|
g_string_append_len
|
|
(outbuf, p, eword_begin_p - p);
|
|
p = eword_begin_p;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
len = MIN(sizeof(charset) - 1,
|
|
encoding_begin_p - (eword_begin_p + 2));
|
|
memcpy(charset, eword_begin_p + 2, len);
|
|
charset[len] = '\0';
|
|
encoding = g_ascii_toupper(*(encoding_begin_p + 1));
|
|
|
|
if (encoding == 'B') {
|
|
decoded_text = g_malloc
|
|
(eword_end_p - (text_begin_p + 1) + 1);
|
|
len = base64_decode(decoded_text, text_begin_p + 1,
|
|
eword_end_p - (text_begin_p + 1));
|
|
decoded_text[len] = '\0';
|
|
} else if (encoding == 'Q') {
|
|
decoded_text = g_malloc
|
|
(eword_end_p - (text_begin_p + 1) + 1);
|
|
len = qp_decode_q_encoding
|
|
(decoded_text, text_begin_p + 1,
|
|
eword_end_p - (text_begin_p + 1));
|
|
} else {
|
|
g_string_append_len(outbuf, p, eword_end_p + 2 - p);
|
|
p = eword_end_p + 2;
|
|
continue;
|
|
}
|
|
|
|
/* convert to UTF-8 */
|
|
conv_str = conv_codeset_strdup(decoded_text, charset, NULL);
|
|
if (!conv_str || !g_utf8_validate(conv_str, -1, NULL)) {
|
|
g_free(conv_str);
|
|
conv_str = g_malloc(len + 1);
|
|
conv_utf8todisp(conv_str, len + 1, decoded_text);
|
|
}
|
|
g_string_append(outbuf, conv_str);
|
|
g_free(conv_str);
|
|
|
|
g_free(decoded_text);
|
|
|
|
p = eword_end_p + 2;
|
|
}
|
|
|
|
out_str = outbuf->str;
|
|
out_len = outbuf->len;
|
|
g_string_free(outbuf, FALSE);
|
|
|
|
return g_realloc(out_str, out_len + 1);
|
|
}
|