From 5cc93f9b21f26b204dba4b496ccc0f732b268c3f Mon Sep 17 00:00:00 2001
From: Niklas Halle <niklas@niklashalle.net>
Date: Mon, 8 Jun 2020 14:56:34 +0200
Subject: force flush after header write

---
 03_exercise/srv/shell.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/03_exercise/srv/shell.c b/03_exercise/srv/shell.c
index 0419f35..95c9982 100644
--- a/03_exercise/srv/shell.c
+++ b/03_exercise/srv/shell.c
@@ -6,6 +6,9 @@
 #include <stdbool.h>
 #include <wait.h>
 #include <errno.h>
+#include <ares_build.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
 
 #include "array.h"
 #include "process.h"
@@ -123,7 +126,12 @@ void send_file(int client_fd, char *path) {
         return;
     }
 
-    usleep(250);
+    int flag = 1;
+    // force flush
+    setsockopt(client_fd, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int));
+    flag = 0;
+
+    usleep(150);
 
     memset(buffer, 0, BUF_SIZE);
 
@@ -156,16 +164,16 @@ void signal_handler(int signal) {
 
 bool check_put(char *buffer, int sock) {
     // "<<!bytecount!name"
-    char   cmd[4];
-    char   rest[BUF_SIZE - 3];
-    size_t file_size;
+    char cmd[4];
 
     memcpy(cmd, buffer, 3);
     cmd[3] = 0;
 
     if (strcmp(cmd, "<<!") == 0) {
-        int offset       = 3;
-        int i            = offset;
+        char   rest[BUF_SIZE - 3];
+        size_t file_size;
+        int    offset = 3;
+        int    i      = offset;
         for (; i < BUF_SIZE; ++i) {
             if (buffer[i] == '!')
                 break;
-- 
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