From 00cca3608962ef1f2ca9672024671221095df54c Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Tue, 23 Nov 2021 19:08:26 +0100
Subject: Removed sendfile for now

It is not compatible between linux and freebsd (different number of
parameters)
---
 Makefile |  2 +-
 cgi.c    | 68 ++++++++++++++++++++++++++--------------------------------------
 2 files changed, 29 insertions(+), 41 deletions(-)

diff --git a/Makefile b/Makefile
index b15cafb..b352ab3 100644
--- a/Makefile
+++ b/Makefile
@@ -15,5 +15,5 @@ clean:
 	rm -f ./main
 
 %:
-	$(CC) $(CFLAGS) -o $@ *.c $(LIBS)
+	$(CC) $(CFLAGS) -o $@ cgi.c main.c $(LIBS)
 
diff --git a/cgi.c b/cgi.c
index 9f75399..aa86c9a 100644
--- a/cgi.c
+++ b/cgi.c
@@ -38,14 +38,6 @@
 #include "main.h"
 #include <cups/cups.h>
 
-# ifdef __FreeBSD__
-#     include <sys/types.h>
-#     include <sys/socket.h>
-#     include <sys/uio.h>
-# else
-#     include <sys/sendfile.h>
-# endif
-
 static const char * line1 = NULL, * line2 = NULL;
 
 int print_on_correct_printer(void * user_data, unsigned flags, cups_dest_t * dest) {
@@ -89,12 +81,37 @@ int print_on_correct_printer(void * user_data, unsigned flags, cups_dest_t * des
 	return 0;
 }
 
-void send_answer(Http_Header * http_header, int fd_socket) {
+void send_answer_file(Http_Header * http_header, int fd_socket) {
+
 	FILE * f = fdopen((size_t) fd_socket, "w");
 	fputs("HTTP/1.0 200 OK\n", f);
 	fputs("content-type: text/html\n\n", f);
 	fflush(f);
 
+	#define BUFFER_SIZE 1024
+	char buffer[BUFFER_SIZE];
+	FILE * file = fopen(&http_header->url[1], "r");
+	if(file) {
+		size_t read_size = 0;
+		for(;;) {
+			read_size = fread(buffer, 1, BUFFER_SIZE, file);
+			fwrite(buffer, 1, read_size, f);
+			fflush(f);
+			if(feof(file))
+				break;
+		}
+	} else {
+		if(http_header->url) // TODO: too dangerous to check that here, that is too late.
+			fprintf(f, "could not open file \"%s\"\n", &http_header->url[1]);
+	}
+
+	fflush(f);
+	fclose(f);
+	return;
+}
+
+void send_answer(Http_Header * http_header, int fd_socket) {
+
 	char * printer_name = "Brother_QL-720NW";
 	cupsEnumDests(CUPS_DEST_FLAGS_NONE,
 			0,
@@ -104,42 +121,13 @@ void send_answer(Http_Header * http_header, int fd_socket) {
 			print_on_correct_printer,
 			printer_name
 			);
-
 	line1 = NULL;
 	line2 = NULL;
 
-	int file = open("index.html", O_RDONLY);
-	if(0 < file) {
-		struct stat stat;
-		fstat(file, &stat);
-		sendfile (fileno(f), file, NULL, stat.st_size);
-	} else {
-		if(http_header->url) // TODO: too dangerous to check that here, that is too late.
-			fprintf(f, "could not open file \"%s\"\n", &http_header->url[1]);
-	}
-
+	http_header->url = "/index.html";
+	send_answer_file(http_header, fd_socket);
 }
 
-void send_answer_file(Http_Header * http_header, int fd_socket) {
-
-	FILE * f = fdopen((size_t) fd_socket, "w");
-	fputs("HTTP/1.0 200 OK\n", f);
-	fputs("content-type: text/plain\n\n", f);
-	fflush(f);
-
-	int file = open(&http_header->url[1], O_RDONLY);
-	if(0 < file) {
-		struct stat stat;
-		fstat(file, &stat);
-		sendfile (fileno(f), file, NULL, stat.st_size);
-	} else {
-		if(http_header->url) // TODO: too dangerous to check that here, that is too late.
-			fprintf(f, "could not open file \"%s\"\n", &http_header->url[1]);
-	}
-
-	fclose(f);
-	return;
-}
 
 void next_part(Http_Header * http_header, const char * content, size_t content_size) {
 	if(!http_header->content_disposition)
-- 
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