nginx 414 Request-URI Too Long - nginx

Question

when I open 127.0.0.1, the url would jump to 127.0.0.1/k.com/k.com/k/.com/......
my hosts
127.0.0.1 localhost
127.0.0.1 k.com
my nginx config
#user _www;
worker_processes 1;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
access_log off;
gzip off;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/json application/x-javascript text/css application/xml text/javascript;
gzip_vary on;
gzip_disable "MSIE [1-6]\.";
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
server {
listen 80;
server_name k.com;
client_max_body_size 20M;
root F:/xxxx/www;
underscores_in_headers on;
index index.html;
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Methods' 'GET,POST,PUT,DELETE';
add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,username,password,remember,token';
location / {
try_files $uri $uri/ /index.html;
}
location = /index.html {
add_header Cache-Control no-cache;
add_header Cache-Control private;
}
}
server {
listen 80;
server_name localhost;
root F:/xxxx/www/htdocs; #
index index.html index.php;
autoindex on;
location / {
try_files $uri $uri/ /index.html;
}
}
}
how to configure 127.0.0.1 , direct to another directory or empty page, either or direct to localhost.