#include "parsedate.h"
#include "database.h"
#include "ctdl_module.h"
-#ifdef HAVE_ICONV
-#include <iconv.h>
-// This is the non-define version in case it is needed for debugging
-#if 0
-inline void FindNextEnd (char *bptr, char *end)
-{
- /* Find the next ?Q? */
- end = strchr(bptr + 2, '?');
- if (end == NULL) return NULL;
- if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) &&
- (*(end + 2) == '?')) {
- /* skip on to the end of the cluster, the next ?= */
- end = strstr(end + 3, "?=");
- }
- else
- /* sort of half valid encoding, try to find an end. */
- end = strstr(bptr, "?=");
-}
-#endif
-
-#define FindNextEnd(bptr, end) { \
- end = strchr(bptr + 2, '?'); \
- if (end != NULL) { \
- if (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) && (*(end + 2) == '?')) { \
- end = strstr(end + 3, "?="); \
- } else end = strstr(bptr, "?="); \
- } \
-}
-
-// Handle subjects with RFC2047 encoding such as:
-// =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
-void utf8ify_rfc822_string(char *buf) {
- char *start, *end, *next, *nextend, *ptr;
- char newbuf[1024];
- char charset[128];
- char encoding[16];
- char istr[1024];
- iconv_t ic = (iconv_t)(-1) ;
- char *ibuf; // Buffer of characters to be converted
- char *obuf; // Buffer for converted characters
- size_t ibuflen; // Length of input buffer
- size_t obuflen; // Length of output buffer
- char *isav; // Saved pointer to input buffer
- char *osav; // Saved pointer to output buffer
- int passes = 0;
- int i, len, delta;
- int illegal_non_rfc2047_encoding = 0;
-
- // Sometimes, badly formed messages contain strings which were simply
- // written out directly in some foreign character set instead of
- // using RFC2047 encoding. This is illegal but we will attempt to
- // handle it anyway by converting from a user-specified default
- // charset to UTF-8 if we see any nonprintable characters.
- len = strlen(buf);
- for (i=0; i<len; ++i) {
- if ((buf[i] < 32) || (buf[i] > 126)) {
- illegal_non_rfc2047_encoding = 1;
- i = len; // take a shortcut, it won't be more than one.
- }
- }
- if (illegal_non_rfc2047_encoding) {
- const char *default_header_charset = "iso-8859-1";
- if ( (strcasecmp(default_header_charset, "UTF-8")) && (strcasecmp(default_header_charset, "us-ascii")) ) {
- ctdl_iconv_open("UTF-8", default_header_charset, &ic);
- if (ic != (iconv_t)(-1) ) {
- ibuf = malloc(1024);
- isav = ibuf;
- safestrncpy(ibuf, buf, 1024);
- ibuflen = strlen(ibuf);
- obuflen = 1024;
- obuf = (char *) malloc(obuflen);
- osav = obuf;
- iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
- osav[1024-obuflen] = 0;
- strcpy(buf, osav);
- free(osav);
- iconv_close(ic);
- free(isav);
- }
- }
- }
-
- // pre evaluate the first pair
- nextend = end = NULL;
- len = strlen(buf);
- start = strstr(buf, "=?");
- if (start != NULL)
- FindNextEnd (start, end);
-
- while ((start != NULL) && (end != NULL)) {
- next = strstr(end, "=?");
- if (next != NULL)
- FindNextEnd(next, nextend);
- if (nextend == NULL)
- next = NULL;
-
- // did we find two partitions
- if ((next != NULL) && ((next - end) > 2)) {
- ptr = end + 2;
- while ((ptr < next) &&
- (isspace(*ptr) ||
- (*ptr == '\r') ||
- (*ptr == '\n') ||
- (*ptr == '\t')))
- ptr ++;
- // did we find a gab just filled with blanks?
- if (ptr == next) {
- memmove(end + 2, next, len - (next - start));
-
- // now terminate the gab at the end
- delta = (next - end) - 2;
- len -= delta;
- buf[len] = '\0';
-
- // move next to its new location.
- next -= delta;
- nextend -= delta;
- }
- }
- // our next-pair is our new first pair now.
- start = next;
- end = nextend;
- }
-
- // Now we handle foreign character sets properly encoded in RFC2047 format.
- start = strstr(buf, "=?");
- FindNextEnd((start != NULL)? start : buf, end);
- while (start != NULL && end != NULL && end > start) {
- extract_token(charset, start, 1, '?', sizeof charset);
- extract_token(encoding, start, 2, '?', sizeof encoding);
- extract_token(istr, start, 3, '?', sizeof istr);
-
- ibuf = malloc(1024);
- isav = ibuf;
- if (!strcasecmp(encoding, "B")) { // base64
- ibuflen = CtdlDecodeBase64(ibuf, istr, strlen(istr));
- }
- else if (!strcasecmp(encoding, "Q")) { // quoted-printable
- size_t len;
- unsigned long pos;
-
- len = strlen(istr);
- pos = 0;
- while (pos < len) {
- if (istr[pos] == '_') istr[pos] = ' ';
- pos++;
- }
- ibuflen = CtdlDecodeQuotedPrintable(ibuf, istr, len);
- }
- else {
- strcpy(ibuf, istr); // unknown encoding
- ibuflen = strlen(istr);
- }
-
- ctdl_iconv_open("UTF-8", charset, &ic);
- if (ic != (iconv_t)(-1) ) {
- obuflen = 1024;
- obuf = (char *) malloc(obuflen);
- osav = obuf;
- iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
- osav[1024-obuflen] = 0;
-
- end = start;
- end++;
- strcpy(start, "");
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- strcpy(end, &end[1]);
-
- snprintf(newbuf, sizeof newbuf, "%s%s%s", buf, osav, end);
- strcpy(buf, newbuf);
- free(osav);
- iconv_close(ic);
- }
- else {
- end = start;
- end++;
- strcpy(start, "");
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- remove_token(end, 0, '?');
- strcpy(end, &end[1]);
-
- snprintf(newbuf, sizeof newbuf, "%s(unreadable)%s", buf, end);
- strcpy(buf, newbuf);
- }
-
- free(isav);
-
- // Since spammers will go to all sorts of absurd lengths to get their
- // messages through, there are LOTS of corrupt headers out there.
- // So, prevent a really badly formed RFC2047 header from throwing
- // this function into an infinite loop.
- ++passes;
- if (passes > 20) return;
-
- start = strstr(buf, "=?");
- FindNextEnd((start != NULL)? start : buf, end);
- }
-
-}
-#else
-inline void utf8ify_rfc822_string(char *a){};
-
-#endif
char *inetcfg = NULL;
projects / citadel.git / blobdiff