/*
* $Id$
*
- * This is a really bad attempt at writing a parser to handle MIME-encoded
- * messages.
+ * This is the MIME parser for Citadel. Sometimes it actually works.
*
- * Copyright (c) 1998-1999 by Art Cancro
+ * Copyright (c) 1998-2001 by Art Cancro
* This code is distributed under the terms of the GNU General Public License.
*
*/
-#include "sysdep.h"
+#ifdef DLL_EXPORT
+#define IN_LIBCIT
+#endif
+
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#include "citadel.h"
-#include "mime_parser.h"
-#include "sysdep_decls.h"
#include "server.h"
-
+#include "dynloader.h"
+#include "sysdep_decls.h"
+#include "mime_parser.h"
+#include "tools.h"
void extract_key(char *target, char *source, char *key)
}
-
-/*
- * Utility function to "readline" from memory
- * (returns new pointer)
+/*
+ * For non-multipart messages, we need to generate a quickie partnum of "1"
+ * to return to callback functions. Some callbacks demand it.
*/
-char *memreadline(char *start, char *buf, int maxlen)
-{
- char ch;
- char *ptr;
-
- ptr = start;
- memset(buf, 0, maxlen);
-
- while (1) {
- ch = *ptr++;
- if ((ch == 10) || (ch == 0)) {
- if (strlen(buf) > 0)
- if (buf[strlen(buf) - 1] == 13)
- buf[strlen(buf) - 1] = 0;
- return ptr;
- }
- if (strlen(buf) < (maxlen - 1)) {
- buf[strlen(buf) + 1] = 0;
- buf[strlen(buf)] = ch;
- }
- }
+char *fixed_partnum(char *supplied_partnum) {
+ if (supplied_partnum == NULL) return "1";
+ if (strlen(supplied_partnum)==0) return "1";
+ return supplied_partnum;
}
+
/*
* Given a message or message-part body and a length, handle any necessary
* decoding and pass the request up the stack.
void *cbcontent,
char *cbtype,
size_t cblength,
+ char *cbencoding,
void *cbuserdata),
- void *userdata
+ void (*PreMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+ void (*PostMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+ void *userdata,
+ int dont_decode
)
{
strcpy(encoding, "");
/* If this part is not encoded, send as-is */
- if (strlen(encoding) == 0) {
- CallBack(name, filename, partnum, disposition, part_start,
- content_type, length, userdata);
+ if ( (strlen(encoding) == 0) || (dont_decode)) {
+ if (CallBack != NULL) {
+ CallBack(name, filename, fixed_partnum(partnum),
+ disposition, part_start,
+ content_type, length, encoding, userdata);
+ }
return;
}
if ((strcasecmp(encoding, "base64"))
&& (strcasecmp(encoding, "quoted-printable"))) {
- lprintf(5, "ERROR: unknown MIME encoding '%s'\n", encoding);
+ lprintf(9, "ERROR: unknown MIME encoding '%s'\n", encoding);
return;
}
/*
* assumption with base64, uuencode, and quoted-printable. Just to
* be safe, we still pad the buffer a bit.
*/
- decoded = mallok(length + 1024);
+ decoded = malloc(length + 1024);
if (decoded == NULL) {
- lprintf(5, "ERROR: cannot allocate memory.\n");
+ lprintf(9, "ERROR: cannot allocate memory.\n");
return;
}
if (pipe(sendpipe) != 0)
childpid = fork();
if (childpid < 0) {
- phree(decoded);
+ free(decoded);
return;
}
if (childpid == 0) {
close(2);
/* send stdio to the pipes */
if (dup2(sendpipe[0], 0) < 0)
- lprintf(5, "ERROR dup2()\n");
+ lprintf(9, "ERROR dup2()\n");
if (dup2(recvpipe[1], 1) < 0)
- lprintf(5, "ERROR dup2()\n");
+ lprintf(9, "ERROR dup2()\n");
close(sendpipe[1]); /* Close the ends we're not using */
close(recvpipe[0]);
if (!strcasecmp(encoding, "base64"))
execlp("./base64", "base64", "-d", NULL);
else if (!strcasecmp(encoding, "quoted-printable"))
execlp("./qpdecode", "qpdecode", NULL);
- lprintf(5, "ERROR: cannot exec decoder for %s\n", encoding);
+ lprintf(9, "ERROR: cannot exec decoder for %s\n", encoding);
exit(1);
}
close(sendpipe[0]); /* Close the ends we're not using */
blocksize = read(recvpipe[0], &decoded[bytes_recv],
statbuf.st_size);
if (blocksize < 0)
- lprintf(5, "ERROR: cannot read from pipe\n");
+ lprintf(9, "ERROR: cannot read from pipe\n");
else
bytes_recv = bytes_recv + blocksize;
}
if (blocksize > 2048)
blocksize = 2048;
if (write(sendpipe[1], &part_start[bytes_sent], blocksize) < 0) {
- lprintf(5, "ERROR: cannot write to pipe: %s\n",
+ lprintf(9, "ERROR: cannot write to pipe: %s\n",
strerror(errno));
write_error = 1;
}
bytes_recv = bytes_recv + blocksize;
}
- if (bytes_recv > 0)
- CallBack(name, filename, partnum, disposition, decoded,
- content_type, bytes_recv, userdata);
+ if (bytes_recv > 0) if (CallBack != NULL) {
+ CallBack(name, filename, fixed_partnum(partnum),
+ disposition, decoded,
+ content_type, bytes_recv, "binary", userdata);
+ }
- phree(decoded);
+ free(decoded);
}
/*
void *cbcontent,
char *cbtype,
size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+ void (*PreMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
void *cbuserdata),
- void *userdata
+ void (*PostMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+ void *userdata,
+ int dont_decode
)
{
char *ptr;
- char *part_start, *part_end;
- char buf[256];
- char header[256];
- char boundary[256];
- char startary[256];
- char endary[256];
- char content_type[256];
- char encoding[256];
- char disposition[256];
- char name[256];
- char filename[256];
+ char *part_start, *part_end = NULL;
+ char buf[SIZ];
+ char header[SIZ];
+ char boundary[SIZ];
+ char startary[SIZ];
+ char endary[SIZ];
+ char content_type[SIZ];
+ size_t content_length;
+ char encoding[SIZ];
+ char disposition[SIZ];
+ char name[SIZ];
+ char filename[SIZ];
int is_multipart;
int part_seq = 0;
int i;
size_t length;
- char nested_partnum[256];
+ char nested_partnum[SIZ];
lprintf(9, "the_mime_parser() called\n");
ptr = content_start;
memset(name, 0, sizeof name);
memset(filename, 0, sizeof filename);
memset(disposition, 0, sizeof disposition);
+ content_length = 0;
+
+ /* If the caller didn't supply an endpointer, generate one by measure */
+ if (content_end == NULL) {
+ content_end = &content_start[strlen(content_start)];
+ }
/* Learn interesting things from the headers */
strcpy(header, "");
do {
ptr = memreadline(ptr, buf, sizeof buf);
- if (*ptr == 0)
- return; /* premature end of message */
- if (content_end != NULL)
- if (ptr >= content_end)
- return;
+ if (ptr >= content_end)
+ return;
for (i = 0; i < strlen(buf); ++i)
if (isspace(buf[i]))
strcpy(disposition, &header[21]);
extract_key(filename, disposition, "filename");
}
+ if (!strncasecmp(header, "Content-length: ", 16)) {
+ content_length = (size_t) atol(&header[16]);
+ }
if (!strncasecmp(header,
"Content-transfer-encoding: ", 27))
strcpy(encoding, &header[27]);
is_multipart = 0;
}
+ lprintf(9, "is_multipart=%d, boundary=<%s>\n",
+ is_multipart, boundary);
+
/* If this is a multipart message, then recursively process it */
part_start = NULL;
if (is_multipart) {
/* Tell the client about this message's multipartedness */
- CallBack("", "", partnum, "", NULL, content_type, 0, userdata);
+ if (PreMultiPartCallBack != NULL) {
+ PreMultiPartCallBack("", "", partnum, "",
+ NULL, content_type,
+ 0, encoding, userdata);
+ }
/* Figure out where the boundaries are */
sprintf(startary, "--%s", boundary);
sprintf(endary, "--%s--", boundary);
do {
- part_end = ptr;
- ptr = memreadline(ptr, buf, sizeof buf);
- if (*ptr == 0)
- return; /* premature end of message */
- if (content_end != NULL)
- if (ptr >= content_end)
- return;
- if ((!strcasecmp(buf, startary))
- || (!strcasecmp(buf, endary))) {
+ if ( (!strncasecmp(ptr, startary, strlen(startary)))
+ || (!strncasecmp(ptr, endary, strlen(endary))) ) {
+ lprintf(9, "hit boundary!\n");
if (part_start != NULL) {
if (strlen(partnum) > 0) {
sprintf(nested_partnum, "%s.%d",
}
the_mime_parser(nested_partnum,
part_start, part_end,
- CallBack, userdata);
+ CallBack,
+ PreMultiPartCallBack,
+ PostMultiPartCallBack,
+ userdata,
+ dont_decode);
}
+ ptr = memreadline(ptr, buf, sizeof(buf));
part_start = ptr;
}
- } while (strcasecmp(buf, endary));
+ else {
+ part_end = ptr;
+ ++ptr;
+ }
+ } while ( (strcasecmp(ptr, endary)) && (ptr <= content_end) );
+ if (PostMultiPartCallBack != NULL) {
+ PostMultiPartCallBack("", "", partnum, "", NULL,
+ content_type, 0, encoding, userdata);
+ }
+ return;
}
/* If it's not a multipart message, then do something with it */
if (!is_multipart) {
+ lprintf(9, "doing non-multipart thing\n");
part_start = ptr;
length = 0;
- while ((*ptr != 0)
- && ((content_end == NULL) || (ptr < content_end))) {
+ while (ptr < content_end) {
+ ++ptr;
++length;
- part_end = ptr++;
}
+ part_end = content_end;
+
+ /* Truncate if the header told us to */
+ if ( (content_length > 0) && (length > content_length) ) {
+ length = content_length;
+ lprintf(9, "truncated to %d\n", content_length);
+ }
+
mime_decode(partnum,
part_start, length,
content_type, encoding, disposition,
- name, filename, CallBack, userdata);
+ name, filename,
+ CallBack, NULL, NULL,
+ userdata, dont_decode);
}
-
-
}
* Note: NULL can be supplied as content_end; in this case, the message is
* considered to have ended when the parser encounters a 0x00 byte.
*/
-void mime_parser(char *content_start, char *content_end,
+void mime_parser(char *content_start,
+ char *content_end,
+
void (*CallBack)
(char *cbname,
char *cbfilename,
void *cbcontent,
char *cbtype,
size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+
+ void (*PreMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
void *cbuserdata),
- void *userdata
+
+ void (*PostMultiPartCallBack)
+ (char *cbname,
+ char *cbfilename,
+ char *cbpartnum,
+ char *cbdisp,
+ void *cbcontent,
+ char *cbtype,
+ size_t cblength,
+ char *cbencoding,
+ void *cbuserdata),
+
+ void *userdata,
+ int dont_decode
)
{
lprintf(9, "mime_parser() called\n");
- the_mime_parser("", content_start, content_end, CallBack, userdata);
+ the_mime_parser("", content_start, content_end,
+ CallBack,
+ PreMultiPartCallBack,
+ PostMultiPartCallBack,
+ userdata, dont_decode);
}
projects / citadel.git / blobdiff