/*
* get_content_type.c - Part of AFD, an automatic file distribution
* program.
* Copyright (c) 2021 Holger Kiehl <Holger.Kiehl@dwd.de>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "afddefs.h"
DESCR__S_M3
/*
** NAME
** get_content_type - tries to determine content-type from filename
** end
**
** SYNOPSIS
** void get_content_type(char *filename,
** char *content_type,
** int is_attachment)
**
** DESCRIPTION
** Tries to determine the content-type from filename extension.
**
** RETURN VALUES
** Returns content type in variable content_type. If the extension
** is unknown it will insert APPLICATION/octet-stream if is_attachment
** is YES, otherwise TEXT/plain,
**
** AUTHOR
** H.Kiehl
**
** HISTORY
** 14.08.2021 H.Kiehl Cut out from smtpcmd.c
*/
DESCR__E_M3
#include <string.h> /* strcpy() */
#include "commondefs.h"
/*######################### get_content_type() ##########################*/
void
get_content_type(char *filename, char *content_type, int is_attachment)
{
content_type[0] = '\0';
if (filename != NULL)
{
char *ptr;
ptr = filename + strlen(filename);
while ((ptr > filename) && (*ptr != '.'))
{
ptr--;
}
if ((*ptr == '.') && (*(ptr + 1) != '\0'))
{
ptr++;
if (((*ptr == 'p') || (*ptr == 'P')) &&
((*(ptr + 1) == 'n') || (*(ptr + 1) == 'N')) &&
((*(ptr + 2) == 'g') || (*(ptr + 2) == 'G')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "IMAGE/png");
}
else if (((*ptr == 'j') || (*ptr == 'J')) &&
((((*(ptr + 1) == 'p') || (*(ptr + 1) == 'P')) &&
(((*(ptr + 2) == 'g') || (*(ptr + 2) == 'G')) ||
((*(ptr + 2) == 'e') || (*(ptr + 2) == 'E'))) &&
(*(ptr + 3) == '\0')) ||
(((*(ptr + 1) == 'e') || (*(ptr + 1) == 'E')) &&
((*(ptr + 2) == 'p') || (*(ptr + 2) == 'P')) &&
((*(ptr + 3) == 'g') || (*(ptr + 3) == 'G')) &&
(*(ptr + 4) == '\0'))))
{
(void)strcpy(content_type, "IMAGE/jpeg");
}
else if (((*ptr == 't') || (*ptr == 'T')) &&
((*(ptr + 1) == 'i') || (*(ptr + 1) == 'I')) &&
((*(ptr + 2) == 'f') || (*(ptr + 2) == 'F')) &&
((((*(ptr + 3) == 'f') || (*(ptr + 3) == 'F')) &&
(*(ptr + 4) == '\0')) ||
(*(ptr + 3) == '\0')))
{
(void)strcpy(content_type, "IMAGE/tiff");
}
else if (((*ptr == 'g') || (*ptr == 'G')) &&
((*(ptr + 1) == 'i') || (*(ptr + 1) == 'I')) &&
((*(ptr + 2) == 'f') || (*(ptr + 2) == 'F')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "IMAGE/gif");
}
else if (((*ptr == 'j') || (*ptr == 'J')) &&
((*(ptr + 1) == 's') || (*(ptr + 1) == 'S')) &&
(*(ptr + 2) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/javascript");
}
else if (((*ptr == 'm') || (*ptr == 'M')) &&
((*(ptr + 1) == 'p') || (*(ptr + 1) == 'P')) &&
(*(ptr + 2) == '4') && (*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/mp4");
}
else if (((*ptr == 'd') || (*ptr == 'D')) &&
((*(ptr + 1) == 'o') || (*(ptr + 1) == 'O')) &&
((*(ptr + 2) == 'c') || (*(ptr + 2) == 'C')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/msword");
}
else if (((*ptr == 'p') || (*ptr == 'P')) &&
((*(ptr + 1) == 'd') || (*(ptr + 1) == 'D')) &&
((*(ptr + 2) == 'f') || (*(ptr + 2) == 'F')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/pdf");
}
else if (((*ptr == 'e') || (*ptr == 'E')) &&
((*(ptr + 1) == 'p') || (*(ptr + 1) == 'P')) &&
((*(ptr + 2) == 's') || (*(ptr + 2) == 'S')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/postscript");
}
else if (((*ptr == 'x') || (*ptr == 'X')) &&
((*(ptr + 1) == 'l') || (*(ptr + 1) == 'L')) &&
((*(ptr + 2) == 's') || (*(ptr + 2) == 'S')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/vnd.ms-excel");
}
else if (((*ptr == 'p') || (*ptr == 'P')) &&
((*(ptr + 1) == 'p') || (*(ptr + 1) == 'P')) &&
((*(ptr + 2) == 't') || (*(ptr + 2) == 'T')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/vnd.ms-powerpoint");
}
else if (((*ptr == 'b') || (*ptr == 'B')) &&
((*(ptr + 1) == 'z') || (*(ptr + 1) == 'Z')) &&
(*(ptr + 2) == '2') && (*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/x-bzip2");
}
else if ((((*ptr == 'g') || (*ptr == 'G')) &&
((*(ptr + 1) == 'z') || (*(ptr + 1) == 'Z')) &&
(*(ptr + 2) == '\0')) ||
(((*ptr == 't') || (*ptr == 'T')) &&
((*(ptr + 1) == 'g') || (*(ptr + 1) == 'G')) &&
((*(ptr + 2) == 'z') || (*(ptr + 2) == 'Z')) &&
(*(ptr + 3) == '\0')))
{
(void)strcpy(content_type, "APPLICATION/x-gzip");
}
else if (((*ptr == 's') || (*ptr == 'S')) &&
((*(ptr + 1) == 'h') || (*(ptr + 1) == 'H')) &&
(*(ptr + 2) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/x-sh");
}
else if (((*ptr == 't') || (*ptr == 'T')) &&
((*(ptr + 1) == 'a') || (*(ptr + 1) == 'A')) &&
((*(ptr + 2) == 'r') || (*(ptr + 2) == 'R')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/x-tar");
}
else if (((*ptr == 'z') || (*ptr == 'Z')) &&
((*(ptr + 1) == 'i') || (*(ptr + 1) == 'I')) &&
((*(ptr + 2) == 'p') || (*(ptr + 2) == 'P')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "APPLICATION/zip");
}
else if (((*ptr == 'm') || (*ptr == 'M')) &&
((*(ptr + 1) == 'p') || (*(ptr + 1) == 'P')) &&
((((*(ptr + 2) == 'g') || (*(ptr + 2) == 'G')) &&
((*(ptr + 3) == 'a') || (*(ptr + 3) == 'A')) &&
(*(ptr + 4) == '\0')) ||
(((*(ptr + 2) == '2') || (*(ptr + 2) == '3')) &&
(*(ptr + 4) == '\0'))))
{
(void)strcpy(content_type, "VIDEO/mpeg");
}
else if ((((*ptr == 'm') || (*ptr == 'M')) &&
((*(ptr + 1) == 'o') || (*(ptr + 1) == 'O')) &&
((*(ptr + 2) == 'v') || (*(ptr + 2) == 'V')) &&
(*(ptr + 3) == '\0')) ||
(((*ptr == 'q') || (*ptr == 'Q')) &&
((*(ptr + 1) == 't') || (*(ptr + 1) == 'T')) &&
(*(ptr + 2) == '\0')))
{
(void)strcpy(content_type, "VIDEO/quicktime");
}
else if (((((*ptr == 'a') || (*ptr == 'A')) &&
((*(ptr + 1) == 's') || (*(ptr + 1) == 'S')) &&
((*(ptr + 2) == 'c') || (*(ptr + 2) == 'C'))) ||
(((*ptr == 't') || (*ptr == 'T')) &&
((*(ptr + 1) == 'x') || (*(ptr + 1) == 'X')) &&
((*(ptr + 2) == 't') || (*(ptr + 2) == 'T')))) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/plain");
}
else if (((*ptr == 'c') || (*ptr == 'C')) &&
((*(ptr + 1) == 's') || (*(ptr + 1) == 'S')) &&
((*(ptr + 2) == 'v') || (*(ptr + 2) == 'V')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/csv");
}
else if (((*ptr == 'c') || (*ptr == 'C')) &&
((*(ptr + 1) == 's') || (*(ptr + 1) == 'S')) &&
((*(ptr + 2) == 's') || (*(ptr + 2) == 'S')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/css");
}
else if (((*ptr == 'r') || (*ptr == 'R')) &&
((*(ptr + 1) == 't') || (*(ptr + 1) == 'T')) &&
((*(ptr + 2) == 'x') || (*(ptr + 2) == 'X')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/richtext");
}
else if (((*ptr == 'r') || (*ptr == 'R')) &&
((*(ptr + 1) == 't') || (*(ptr + 1) == 'T')) &&
((*(ptr + 2) == 'f') || (*(ptr + 2) == 'F')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/rtf");
}
else if (((*ptr == 'x') || (*ptr == 'X')) &&
((*(ptr + 1) == 'm') || (*(ptr + 1) == 'M')) &&
((*(ptr + 2) == 'l') || (*(ptr + 2) == 'L')) &&
(*(ptr + 3) == '\0'))
{
(void)strcpy(content_type, "TEXT/xml");
}
else if (((*ptr == 'h') || (*ptr == 'H')) &&
((*(ptr + 1) == 't') || (*(ptr + 1) == 'T')) &&
((*(ptr + 2) == 'm') || (*(ptr + 2) == 'M')) &&
((((*(ptr + 3) == 'l') || (*(ptr + 3) == 'L')) &&
(*(ptr + 4) == '\0')) ||
(*(ptr + 3) == '\0')))
{
(void)strcpy(content_type, "TEXT/html");
}
}
}
if (content_type[0] == '\0')
{
if (is_attachment == YES)
{
(void)strcpy(content_type, "APPLICATION/octet-stream");
}
else
{
/*
* Maybe it is better to insert "TEXT/plain" since this
* is what mail servers do if they do not get the Content-Type
* from the client.
*/
(void)strcpy(content_type, "TEXT/plain");
}
}
return;
}