/*
- * $Id$
- *
* Output an HTML message, modifying it slightly to make sure it plays nice
* with the rest of our web framework.
*
+ * Copyright (c) 2005-2012 by the citadel.org team
+ *
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 3.
+ *
+ * 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.
*/
-#include <ctype.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <limits.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <string.h>
-#include <pwd.h>
-#include <errno.h>
-#include <stdarg.h>
-#include <pthread.h>
-#include <signal.h>
#include "webcit.h"
-#include "vcard.h"
-#include "webserver.h"
+
+
+
+/*
+ * Strip surrounding single or double quotes from a string.
+ */
+void stripquotes(char *s)
+{
+ int len;
+
+ if (!s) return;
+
+ len = strlen(s);
+ if (len < 2) return;
+
+ if ( ( (s[0] == '\"') && (s[len-1] == '\"') ) || ( (s[0] == '\'') && (s[len-1] == '\'') ) ) {
+ s[len-1] = 0;
+ strcpy(s, &s[1]);
+ }
+}
+
+
+/*
+ * Check to see if a META tag has overridden the declared MIME character set.
+ *
+ * charset Character set name (left unchanged if we don't do anything)
+ * meta_http_equiv Content of the "http-equiv" portion of the META tag
+ * meta_content Content of the "content" portion of the META tag
+ */
+void extract_charset_from_meta(char *charset, char *meta_http_equiv, char *meta_content)
+{
+ char *ptr;
+ char buf[64];
+
+ if (!charset) return;
+ if (!meta_http_equiv) return;
+ if (!meta_content) return;
+
+
+ if (strcasecmp(meta_http_equiv, "Content-type")) return;
+
+ ptr = strchr(meta_content, ';');
+ if (!ptr) return;
+
+ safestrncpy(buf, ++ptr, sizeof buf);
+ string_trim(buf);
+ if (!strncasecmp(buf, "charset=", 8)) {
+ strcpy(charset, &buf[8]);
+
+ /*
+ * The brain-damaged webmail program in Microsoft Exchange declares
+ * a charset of "unicode" when they really mean "UTF-8". GNU iconv
+ * treats "unicode" as an alias for "UTF-16" so we have to manually
+ * fix this here, otherwise messages generated in Exchange webmail
+ * show up as a big pile of weird characters.
+ */
+ if (!strcasecmp(charset, "unicode")) {
+ strcpy(charset, "UTF-8");
+ }
+
+ /* Remove wandering punctuation */
+ if ((ptr=strchr(charset, '\"'))) *ptr = 0;
+ string_trim(charset);
+ }
+}
+
/*
+ * Sanitize and enhance an HTML message for display.
+ * Also convert weird character sets to UTF-8 if necessary.
+ * Also fixup img src="cid:..." type inline images to fetch the image
+ *
*/
-void output_html(void) {
+void output_html(const char *supplied_charset, int treat_as_wiki, int msgnum, StrBuf *Source, StrBuf *Target) {
char buf[SIZ];
char *msg;
char *ptr;
char *msgstart;
char *msgend;
- char *converted_msg;
+ StrBuf *converted_msg;
int buffer_length = 1;
int line_length = 0;
int content_length = 0;
- int output_length = 0;
char new_window[SIZ];
int brak = 0;
+ int alevel = 0;
+ int scriptlevel = 0;
+ int script_start_pos = (-1);
int i;
int linklen;
+ char charset[128];
+ StrBuf *BodyArea = NULL;
+#ifdef HAVE_ICONV
+ 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 *osav; /* Saved pointer to output buffer */
+#endif
+ if (Target == NULL)
+ Target = WC->WBuf;
+ safestrncpy(charset, supplied_charset, sizeof charset);
msg = strdup("");
- sprintf(new_window, "<A TARGET=\"%s\" HREF=", TARGET);
+ sprintf(new_window, "<a target=\"%s\" href=", TARGET);
- while (serv_gets(buf), strcmp(buf, "000")) {
+ if (Source == NULL) while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
line_length = strlen(buf);
buffer_length = content_length + line_length + 2;
- msg = realloc(msg, buffer_length);
- if (msg == NULL) {
- wprintf("<B>realloc() error! "
- "couldn't get %d bytes: %s</B><BR><BR>\n",
- buffer_length + 1,
- strerror(errno));
+ ptr = realloc(msg, buffer_length);
+ if (ptr == NULL) {
+ StrBufAppendPrintf(Target, "<b>");
+ StrBufAppendPrintf(Target, _("realloc() error! couldn't get %d bytes: %s"),
+ buffer_length + 1,
+ strerror(errno));
+ StrBufAppendPrintf(Target, "</b><br><br>\n");
+ while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
+ /** flush */
+ }
+ free(msg);
return;
}
+ msg = ptr;
strcpy(&msg[content_length], buf);
content_length += line_length;
strcpy(&msg[content_length], "\n");
content_length += 1;
}
+ else {
+ content_length = StrLength(Source);
+ free(msg);
+ msg = (char*) ChrPtr(Source);/* TODO: remove cast */
+ buffer_length = content_length;
+ }
- ptr = msg;
+ /** Do a first pass to isolate the message body */
+ ptr = msg + 1;
msgstart = msg;
msgend = &msg[content_length];
while (ptr < msgend) {
- /* Advance to next tag */
+ /** Advance to next tag */
ptr = strchr(ptr, '<');
if ((ptr == NULL) || (ptr >= msgend)) break;
++ptr;
if ((ptr == NULL) || (ptr >= msgend)) break;
- /* Any of these tags cause everything up to and including
+ /*
+ * Look for META tags. Some messages (particularly in
+ * Asian locales) illegally declare a message's character
+ * set in the HTML instead of in the MIME headers. This
+ * is wrong but we have to work around it anyway.
+ */
+ if (!strncasecmp(ptr, "META", 4)) {
+
+ char *meta_start;
+ char *meta_end;
+ int meta_length;
+ char *meta;
+ char *meta_http_equiv;
+ char *meta_content;
+ char *spaceptr;
+
+ meta_start = &ptr[4];
+ meta_end = strchr(ptr, '>');
+ if ((meta_end != NULL) && (meta_end <= msgend)) {
+ meta_length = meta_end - meta_start + 1;
+ meta = malloc(meta_length + 1);
+ safestrncpy(meta, meta_start, meta_length);
+ meta[meta_length] = 0;
+ string_trim(meta);
+ if (!strncasecmp(meta, "HTTP-EQUIV=", 11)) {
+ meta_http_equiv = strdup(&meta[11]);
+ spaceptr = strchr(meta_http_equiv, ' ');
+ if (spaceptr != NULL) {
+ *spaceptr = 0;
+ meta_content = strdup(++spaceptr);
+ if (!strncasecmp(meta_content, "content=", 8)) {
+ strcpy(meta_content, &meta_content[8]);
+ stripquotes(meta_http_equiv);
+ stripquotes(meta_content);
+ extract_charset_from_meta(charset,
+ meta_http_equiv, meta_content);
+ }
+ free(meta_content);
+ }
+ free(meta_http_equiv);
+ }
+ free(meta);
+ }
+ }
+
+ /*
+ * Any of these tags cause everything up to and including
* the tag to be removed.
*/
if ( (!strncasecmp(ptr, "HTML", 4))
- ||(!strncasecmp(ptr, "HEAD", 4))
- ||(!strncasecmp(ptr, "/HEAD", 5))
- ||(!strncasecmp(ptr, "BODY", 4)) ) {
+ ||(!strncasecmp(ptr, "HEAD", 4))
+ ||(!strncasecmp(ptr, "/HEAD", 5))
+ ||(!strncasecmp(ptr, "BODY", 4)) ) {
+ char *pBody = NULL;
+
+ if (!strncasecmp(ptr, "BODY", 4)) {
+ pBody = ptr;
+ }
ptr = strchr(ptr, '>');
if ((ptr == NULL) || (ptr >= msgend)) break;
+ if ((pBody != NULL) && (ptr - pBody > 4)) {
+ char* src;
+ char *cid_start, *cid_end;
+
+ *ptr = '\0';
+ pBody += 4;
+ while ((isspace(*pBody)) && (pBody < ptr))
+ pBody ++;
+ BodyArea = NewStrBufPlain(NULL, ptr - pBody);
+
+ if (pBody < ptr) {
+ src = strstr(pBody, "cid:");
+ if (src) {
+ cid_start = src + 4;
+ cid_end = cid_start;
+ while ((*cid_end != '"') &&
+ !isspace(*cid_end) &&
+ (cid_end < ptr))
+ cid_end ++;
+
+ /* copy tag and attributes up to src="cid: */
+ StrBufAppendBufPlain(BodyArea, pBody, src - pBody, 0);
+
+ /* add in /webcit/mimepart/<msgno>/CID/
+ trailing / stops dumb URL filters getting excited */
+ StrBufAppendPrintf(BodyArea,
+ "/webcit/mimepart/%d/",msgnum);
+ StrBufAppendBufPlain(BodyArea, cid_start, cid_end - cid_start, 0);
+
+ if (ptr - cid_end > 0)
+ StrBufAppendBufPlain(BodyArea,
+ cid_end + 1,
+ ptr - cid_end, 0);
+ }
+ else
+ StrBufAppendBufPlain(BodyArea, pBody, ptr - pBody, 0);
+ }
+ *ptr = '>';
+ }
++ptr;
if ((ptr == NULL) || (ptr >= msgend)) break;
msgstart = ptr;
}
- /* Any of these tags cause everything including and following
+ /*
+ * Any of these tags cause everything including and following
* the tag to be removed.
*/
if ( (!strncasecmp(ptr, "/HTML", 5))
- ||(!strncasecmp(ptr, "/BODY", 5)) ) {
+ ||(!strncasecmp(ptr, "/BODY", 5)) ) {
--ptr;
msgend = ptr;
strcpy(ptr, "");
-
+
}
++ptr;
}
+ if (msgstart > msg) {
+ strcpy(msg, msgstart);
+ }
+
+ /* Now go through the message, parsing tags as necessary. */
+ converted_msg = NewStrBufPlain(NULL, content_length + 8192);
- converted_msg = malloc(content_length);
- strcpy(converted_msg, "");
- ptr = msgstart;
+
+ /** Convert foreign character sets to UTF-8 if necessary. */
+#ifdef HAVE_ICONV
+ if ( (strcasecmp(charset, "us-ascii"))
+ && (strcasecmp(charset, "UTF-8"))
+ && (strcasecmp(charset, ""))
+ ) {
+ syslog(LOG_DEBUG, "Converting %s to UTF-8\n", charset);
+ ctdl_iconv_open("UTF-8", charset, &ic);
+ if (ic == (iconv_t)(-1) ) {
+ syslog(LOG_WARNING, "%s:%d iconv_open() failed: %s\n",
+ __FILE__, __LINE__, strerror(errno));
+ }
+ }
+ if (Source == NULL) {
+ if (ic != (iconv_t)(-1) ) {
+ ibuf = msg;
+ ibuflen = content_length;
+ obuflen = content_length + (content_length / 2) ;
+ obuf = (char *) malloc(obuflen);
+ osav = obuf;
+ iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
+ content_length = content_length + (content_length / 2) - obuflen;
+ osav[content_length] = 0;
+ free(msg);
+ msg = osav;
+ iconv_close(ic);
+ }
+ }
+ else {
+ if (ic != (iconv_t)(-1) ) {
+ StrBuf *Buf = NewStrBufPlain(NULL, StrLength(Source) + 8096);;
+ StrBufConvert(Source, Buf, &ic);
+ FreeStrBuf(&Buf);
+ iconv_close(ic);
+ msg = (char*)ChrPtr(Source); /* TODO: get rid of this. */
+ }
+ }
+
+#endif
+
+ /*
+ * At this point, the message has been stripped down to
+ * only the content inside the <BODY></BODY> tags, and has
+ * been converted to UTF-8 if it was originally in a foreign
+ * character set. The text is also guaranteed to be null
+ * terminated now.
+ */
+
+ if (converted_msg == NULL) {
+ StrBufAppendPrintf(Target, "Error %d: %s<br>%s:%d", errno, strerror(errno), __FILE__, __LINE__);
+ goto BAIL;
+ }
+
+ if (BodyArea != NULL) {
+ StrBufAppendBufPlain(converted_msg, HKEY("<table "), 0);
+ StrBufAppendBuf(converted_msg, BodyArea, 0);
+ StrBufAppendBufPlain(converted_msg, HKEY(" width=\"100%\"><tr><td>"), 0);
+ }
+ ptr = msg;
+ msgend = strchr(msg, 0);
while (ptr < msgend) {
- /* Change mailto: links to WebCit mail, by replacing the
+
+ /** Try to sanitize the html of any rogue scripts */
+ if (!strncasecmp(ptr, "<script", 7)) {
+ if (scriptlevel == 0) {
+ script_start_pos = StrLength(converted_msg);
+ }
+ ++scriptlevel;
+ }
+ if (!strncasecmp(ptr, "</script", 8)) {
+ --scriptlevel;
+ }
+
+ /**
+ * Change mailto: links to WebCit mail, by replacing the
* link with one that points back to our mail room. Due to
* the way we parse URL's, it'll even handle mailto: links
* that have "?subject=" in them.
*/
- if (!strncasecmp(ptr, "<A HREF=\"mailto:", 16)) {
+ if (!strncasecmp(ptr, "<a href=\"mailto:", 16)) {
content_length += 64;
- converted_msg = realloc(converted_msg, content_length);
- sprintf(&converted_msg[output_length],
- "<A HREF=\"/display_enter"
- "?force_room=_MAIL_&recp=");
- output_length += 47;
+ StrBufAppendPrintf(converted_msg,
+ "<a href=\"display_enter?force_room=_MAIL_?recp=");
ptr = &ptr[16];
+ ++alevel;
++brak;
}
- /* Make links open in a separate window */
- else if (!strncasecmp(ptr, "<A HREF=", 8)) {
- content_length += 64;
- converted_msg = realloc(converted_msg, content_length);
- sprintf(&converted_msg[output_length], new_window);
- output_length += strlen(new_window);
- ptr = &ptr[8];
+ /** Make external links open in a separate window */
+ else if (!strncasecmp(ptr, "<a href=\"", 9)) {
+ ++alevel;
++brak;
+ if ( ((strchr(ptr, ':') < strchr(ptr, '/')))
+ && ((strchr(ptr, '/') < strchr(ptr, '>')))
+ ) {
+ /* open external links to new window */
+ StrBufAppendPrintf(converted_msg, new_window);
+ ptr = &ptr[8];
+ }
+ else if (
+ (treat_as_wiki)
+ && (strncasecmp(ptr, "<a href=\"wiki?", 14))
+ && (strncasecmp(ptr, "<a href=\"dotgoto?", 17))
+ && (strncasecmp(ptr, "<a href=\"knrooms?", 17))
+ ) {
+ content_length += 64;
+ StrBufAppendPrintf(converted_msg, "<a href=\"wiki?go=");
+ StrBufUrlescAppend(converted_msg, WC->CurRoom.name, NULL);
+ StrBufAppendPrintf(converted_msg, "?page=");
+ ptr = &ptr[9];
+ }
+ else {
+ StrBufAppendPrintf(converted_msg, "<a href=\"");
+ ptr = &ptr[9];
+ }
}
- /* Turn anything that looks like a URL into a real link, as long
+ /** Fixup <img src="cid:... ...> to fetch the mime part */
+ else if (!strncasecmp(ptr, "<img ", 5)) {
+ char *cid_start, *cid_end;
+ char* tag_end=strchr(ptr,'>');
+ char* src;
+ /* FIXME - handle this situation (maybe someone opened an <img cid...
+ * and then ended the message)
+ */
+ if (!tag_end) {
+ syslog(LOG_DEBUG, "tag_end is null and ptr is:\n");
+ syslog(LOG_DEBUG, "%s\n", ptr);
+ syslog(LOG_DEBUG, "Theoretical bytes remaining: %d\n", (int)(msgend - ptr));
+ }
+
+ src=strstr(ptr, "src=\"cid:");
+ ++brak;
+
+ if (src
+ && isspace(*(src-1))
+ && tag_end
+ && (cid_start=strchr(src,':'))
+ && (cid_end=strchr(cid_start,'"'))
+ && (cid_end < tag_end)
+ ) {
+ /* copy tag and attributes up to src="cid: */
+ StrBufAppendBufPlain(converted_msg, ptr, src - ptr, 0);
+ cid_start++;
+
+ /* add in /webcit/mimepart/<msgno>/CID/
+ trailing / stops dumb URL filters getting excited */
+ StrBufAppendPrintf(converted_msg,
+ " src=\"/webcit/mimepart/%d/",msgnum);
+ StrBufAppendBufPlain(converted_msg, cid_start, cid_end - cid_start, 0);
+ StrBufAppendBufPlain(converted_msg, "/\"", -1, 0);
+
+ ptr = cid_end+1;
+ }
+ StrBufAppendBufPlain(converted_msg, ptr, tag_end - ptr, 0);
+ ptr = tag_end;
+ }
+
+ /**
+ * Turn anything that looks like a URL into a real link, as long
* as it's not inside a tag already
*/
- else if ( (brak == 0)
- && (!strncasecmp(ptr, "http://", 7))) {
- linklen = 0;
- /* Find the end of the link */
- for (i=0; i<=strlen(ptr); ++i) {
- if ((ptr[i]==0)
- ||(isspace(ptr[i]))
- ||(ptr[i]==10)
- ||(ptr[i]==13)
- ||(ptr[i]==')')
- ||(ptr[i]=='>')
- ||(ptr[i]==']')
+ else if ( (brak == 0) && (alevel == 0) &&
+ ( (!strncasecmp(ptr, "http://", 7)) ||
+ (!strncasecmp(ptr, "https://", 8)))) {
+ /** Find the end of the link */
+ int strlenptr;
+ linklen = 0;
+
+ strlenptr = strlen(ptr);
+ for (i=0; i<=strlenptr; ++i) {
+ if ((ptr[i]==0)
+ ||(isspace(ptr[i]))
+ ||(ptr[i]==10)
+ ||(ptr[i]==13)
+ ||(ptr[i]=='(')
+ ||(ptr[i]==')')
+ ||(ptr[i]=='<')
+ ||(ptr[i]=='>')
+ ||(ptr[i]=='[')
+ ||(ptr[i]==']')
+ ||(ptr[i]=='"')
+ ||(ptr[i]=='\'')
) linklen = i;
- if (linklen > 0) break;
+ /* did s.b. send us an entity? */
+ if (ptr[i] == '&') {
+ if ((ptr[i+2] ==';') ||
+ (ptr[i+3] ==';') ||
+ (ptr[i+5] ==';') ||
+ (ptr[i+6] ==';') ||
+ (ptr[i+7] ==';'))
+ linklen = i;
}
- if (linklen > 0) {
- content_length += (32 + linklen);
- converted_msg = realloc(converted_msg, content_length);
- sprintf(&converted_msg[output_length], new_window);
- output_length += strlen(new_window);
- converted_msg[output_length] = '\"';
- converted_msg[++output_length] = 0;
- for (i=0; i<linklen; ++i) {
- converted_msg[output_length] = ptr[i];
- converted_msg[++output_length] = 0;
- }
- sprintf(&converted_msg[output_length], "\">");
- output_length += 2;
- for (i=0; i<linklen; ++i) {
- converted_msg[output_length] = *ptr++;
- converted_msg[++output_length] = 0;
- }
- sprintf(&converted_msg[output_length], "</A>");
- output_length += 4;
+ if (linklen > 0) break;
+ }
+ if (linklen > 0) {
+ char *ltreviewptr;
+ char *nbspreviewptr;
+ char linkedchar;
+ int len;
+
+ len = linklen;
+ linkedchar = ptr[len];
+ ptr[len] = '\0';
+ /* spot for some subject strings tinymce tends to give us. */
+ ltreviewptr = strchr(ptr, '<');
+ if (ltreviewptr != NULL) {
+ *ltreviewptr = '\0';
+ linklen = ltreviewptr - ptr;
+ }
+
+ nbspreviewptr = strstr(ptr, " ");
+ if (nbspreviewptr != NULL) {
+ /* nbspreviewptr = '\0'; */
+ linklen = nbspreviewptr - ptr;
}
+ if (ltreviewptr != 0)
+ *ltreviewptr = '<';
+
+ ptr[len] = linkedchar;
+
+ content_length += (32 + linklen);
+ StrBufAppendPrintf(converted_msg, "%s\"", new_window);
+ StrBufAppendBufPlain(converted_msg, ptr, linklen, 0);
+ StrBufAppendPrintf(converted_msg, "\">");
+ StrBufAppendBufPlain(converted_msg, ptr, linklen, 0);
+ ptr += linklen;
+ StrBufAppendPrintf(converted_msg, "</A>");
+ }
}
else {
+ StrBufAppendBufPlain(converted_msg, ptr, 1, 0);
+ ptr++;
+ }
+
+
+ if ((ptr >= msg) && (ptr <= msgend)) {
/*
* We need to know when we're inside a tag,
* so we don't turn things that look like URL's into
* links, when they're already links - or image sources.
*/
- if (*ptr == '<') ++brak;
- if (*ptr == '>') --brak;
- converted_msg[output_length] = *ptr++;
- converted_msg[++output_length] = 0;
+ if ((ptr > msg) && (*(ptr-1) == '<')) {
+ ++brak;
+ }
+ if ((ptr > msg) && (*(ptr-1) == '>')) {
+ --brak;
+ if ((scriptlevel == 0) && (script_start_pos >= 0)) {
+ StrBufCutRight(converted_msg, StrLength(converted_msg) - script_start_pos);
+ script_start_pos = (-1);
+ }
+ }
+ if (!strncasecmp(ptr, "</A>", 3)) --alevel;
+ }
+ }
+
+ if (BodyArea != NULL) {
+ StrBufAppendBufPlain(converted_msg, HKEY("</td></tr></table>"), 0);
+ FreeStrBuf(&BodyArea);
+ }
+
+ /** uncomment these two lines to override conversion */
+ /** memcpy(converted_msg, msg, content_length); */
+ /** output_length = content_length; */
+
+ /** Output our big pile of markup */
+ StrBufAppendBuf(Target, converted_msg, 0);
+
+BAIL: /** A little trailing vertical whitespace... */
+ StrBufAppendPrintf(Target, "<br><br>\n");
+
+ /** Now give back the memory */
+ FreeStrBuf(&converted_msg);
+ if ((msg != NULL) && (Source == NULL)) free(msg);
+}
+
+
+
+
+
+
+/*
+ * Look for URL's embedded in a buffer and make them linkable. We use a
+ * target window in order to keep the Citadel session in its own window.
+ */
+void UrlizeText(StrBuf* Target, StrBuf *Source, StrBuf *WrkBuf)
+{
+ int len, UrlLen, Offset, TrailerLen;
+ const char *start, *end, *pos;
+
+ FlushStrBuf(Target);
+
+ start = NULL;
+ len = StrLength(Source);
+ end = ChrPtr(Source) + len;
+ for (pos = ChrPtr(Source); (pos < end) && (start == NULL); ++pos) {
+ if (!strncasecmp(pos, "http://", 7))
+ start = pos;
+ else if (!strncasecmp(pos, "ftp://", 6))
+ start = pos;
+ }
+
+ if (start == NULL) {
+ StrBufAppendBuf(Target, Source, 0);
+ return;
+ }
+ FlushStrBuf(WrkBuf);
+
+ for (pos = ChrPtr(Source) + len; pos > start; --pos) {
+ if ( (!isprint(*pos))
+ || (isspace(*pos))
+ || (*pos == '{')
+ || (*pos == '}')
+ || (*pos == '|')
+ || (*pos == '\\')
+ || (*pos == '^')
+ || (*pos == '[')
+ || (*pos == ']')
+ || (*pos == '`')
+ || (*pos == '<')
+ || (*pos == '>')
+ || (*pos == '(')
+ || (*pos == ')')
+ ) {
+ end = pos;
}
}
+
+ UrlLen = end - start;
+ StrBufAppendBufPlain(WrkBuf, start, UrlLen, 0);
+
+ Offset = start - ChrPtr(Source);
+ if (Offset != 0)
+ StrBufAppendBufPlain(Target, ChrPtr(Source), Offset, 0);
+ StrBufAppendPrintf(Target, "%ca href=%c%s%c TARGET=%c%s%c%c%s%c/A%c",
+ LB, QU, ChrPtr(WrkBuf), QU, QU, TARGET,
+ QU, RB, ChrPtr(WrkBuf), LB, RB);
+
+ TrailerLen = StrLength(Source) - (end - ChrPtr(Source));
+ if (TrailerLen > 0)
+ StrBufAppendBufPlain(Target, end, TrailerLen, 0);
+}
- /* Output our big pile of markup */
- client_write(converted_msg, output_length);
- /* A little trailing vertical whitespace... */
- wprintf("<BR><BR>\n");
+void url(char *buf, size_t bufsize)
+{
+ int len, UrlLen, Offset, TrailerLen, outpos;
+ char *start, *end, *pos;
+ char urlbuf[SIZ];
+ char outbuf[SIZ];
+
+ start = NULL;
+ len = strlen(buf);
+ if (len > bufsize) {
+ syslog(LOG_WARNING, "URL: content longer than buffer!");
+ return;
+ }
+ end = buf + len;
+ for (pos = buf; (pos < end) && (start == NULL); ++pos) {
+ if (!strncasecmp(pos, "http://", 7))
+ start = pos;
+ if (!strncasecmp(pos, "ftp://", 6))
+ start = pos;
+ }
+
+ if (start == NULL)
+ return;
- /* Now give back the memory */
- free(converted_msg);
- free(msg);
+ for (pos = buf+len; pos > start; --pos) {
+ if ( (!isprint(*pos))
+ || (isspace(*pos))
+ || (*pos == '{')
+ || (*pos == '}')
+ || (*pos == '|')
+ || (*pos == '\\')
+ || (*pos == '^')
+ || (*pos == '[')
+ || (*pos == ']')
+ || (*pos == '`')
+ || (*pos == '<')
+ || (*pos == '>')
+ || (*pos == '(')
+ || (*pos == ')')
+ ) {
+ end = pos;
+ }
+ }
+
+ UrlLen = end - start;
+ if (UrlLen > sizeof(urlbuf)){
+ syslog(LOG_WARNING, "URL: content longer than buffer!");
+ return;
+ }
+ memcpy(urlbuf, start, UrlLen);
+ urlbuf[UrlLen] = '\0';
+
+ Offset = start - buf;
+ if ((Offset != 0) && (Offset < sizeof(outbuf)))
+ memcpy(outbuf, buf, Offset);
+ outpos = snprintf(&outbuf[Offset], sizeof(outbuf) - Offset,
+ "%ca href=%c%s%c TARGET=%c%s%c%c%s%c/A%c",
+ LB, QU, urlbuf, QU, QU, TARGET, QU, RB, urlbuf, LB, RB);
+ if (outpos >= sizeof(outbuf) - Offset) {
+ syslog(LOG_WARNING, "URL: content longer than buffer!");
+ return;
+ }
+
+ TrailerLen = len - (end - start);
+ if (TrailerLen > 0)
+ memcpy(outbuf + Offset + outpos, end, TrailerLen);
+ if (Offset + outpos + TrailerLen > bufsize) {
+ syslog(LOG_WARNING, "URL: content longer than buffer!");
+ return;
+ }
+ memcpy (buf, outbuf, Offset + outpos + TrailerLen);
+ *(buf + Offset + outpos + TrailerLen) = '\0';
}
projects / citadel.git / blobdiff