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/*
* Copyright (c) 2009 Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
/*
* This program is a CGI application. It processes server-side includes:
* <!--#include file="file.html" -->
*
* Usage: put these lines in httpd.conf:
*
* *.html:/bin/httpd_ssi
* *.htm:/bin/httpd_ssi
*/
/* Build a-la
i486-linux-uclibc-gcc \
-static -static-libgcc \
-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \
-Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Werror \
-Wold-style-definition -Wdeclaration-after-statement -Wno-pointer-sign \
-Wmissing-prototypes -Wmissing-declarations \
-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer \
-ffunction-sections -fdata-sections -fno-guess-branch-probability \
-funsigned-char \
-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 \
-march=i386 -mpreferred-stack-boundary=2 \
-Wl,-Map -Wl,link.map -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
httpd_ssi.c -o httpd_ssi
*/
/* Size (i386, static uclibc, approximate):
text data bss dec hex filename
8931 164 68552 77647 12f4f httpd_ssi
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <time.h>
static char line[64 * 1024];
/*
* Currently only handles directives which are alone on the line
*/
static void process_includes(const char *filename)
{
FILE *fp = fopen(filename, "r");
if (!fp)
exit(1);
#define INCLUDE "<!--#include file=\""
while (fgets(line, sizeof(line), fp)) {
char *closing_dq;
/* FIXME: output text leading to INCLUDE first */
if (strncmp(line, INCLUDE, sizeof(INCLUDE)-1) != 0
|| (closing_dq = strchr(line + sizeof(INCLUDE)-1, '"')) == NULL
/* or strstr(line + sizeof(INCLUDE)-1, "\" -->")? */
) {
fputs(line, stdout);
continue;
}
*closing_dq = '\0';
/* FIXME:
* (1) are relative paths with /../ etc ok?
* (2) if we include a/1.htm and it includes b/2.htm,
* do we need to include a/b/2.htm or b/2.htm?
* IOW, do we need to "cd $dirname"?
*/
process_includes(line + sizeof(INCLUDE)-1);
/* FIXME: this should be the tail of line after --> */
putchar('\n');
}
}
int main(int argc, char *argv[])
{
if (!argv[1])
return 1;
/* Seen from busybox.net's Apache:
* HTTP/1.1 200 OK
* Date: Thu, 10 Sep 2009 18:23:28 GMT
* Server: Apache
* Accept-Ranges: bytes
* Connection: close
* Content-Type: text/html
*/
printf(
/* "Date: Thu, 10 Sep 2009 18:23:28 GMT\r\n" */
/* "Server: Apache\r\n" */
/* "Accept-Ranges: bytes\r\n" - do we really accept bytes?! */
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n"
);
process_includes(argv[1]);
return 0;
}
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