add webserver source code

tools/webserver/get_time.c

@@ -0,0 +1,37 @@
+/*
+* file:get_time.c
+*/
+#include <time.h>
+#include <stdio.h>
+#include <string.h>
+#include "get_time.h"
+
+
+/* get the time on server,
+   return: the ascii string of time , NULL on error
+   argument: time_buf the buffer to store time_string
+*/
+
+char *get_time_str(char *time_buf)
+{
+    time_t    now_sec;
+    struct tm    *time_now;
+    if(    time(&now_sec) == -1)
+    {
+        perror("time() in get_time.c");
+        return NULL;
+    }
+    if((time_now = gmtime(&now_sec)) == NULL)
+    {
+        perror("localtime in get_time.c");
+        return NULL;
+    }
+    char *str_ptr = NULL;
+    if((str_ptr = asctime(time_now)) == NULL)
+    {
+        perror("asctime in get_time.c");
+        return NULL;
+    }
+    strcat(time_buf, str_ptr);
+    return time_buf;
+}

tools/webserver/get_time.h

@@ -0,0 +1,11 @@
+#ifndef GET_TIME_H
+#define GET_TIME_H
+
+
+#define TIME_BUFFER_SIZE    40    /* buffer size of time_buffer */
+
+char *get_time_str(char *time_buf);
+
+
+
+#endif