networking/httpd_ssi.c: new example CGI handler
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/httpd_ssi.c b/networking/httpd_ssi.c
new file mode 100644
index 0000000..f758059
--- /dev/null
+++ b/networking/httpd_ssi.c
@@ -0,0 +1,102 @@
+/*
+ * 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" -->
+ */
+
+/* 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 ok?
+ * (2) if we include a/1.htm and it includes b/2.htm,
+ * do we need to insert 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;
+}