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    ▪nginx负载memcached不能返回304状态字问题的解决方法      一、问题描述： 使用nginx作为负载均衡，当访问为图片时到memcached中找，如果未找到运行apache模块将相应文件写入memcached。如果访问图片last-modified为改变，则从本地浏览器的缓存中读取相应.........

    ▪nginx屏蔽ip直接访问的方法      某些情况下需要禁止ip直接访问站点,在nginx.conf中加入如下代码：   代码如下: #禁止IP访问 server { listen 80 default; server_name _; return 500; } 将nginx服务reload 生效 即可, 这样便屏蔽了80端口ip直.........

    ▪创建nginx的启动脚本      首先，安装nginx。 代码如下: # yum install gcc openssl-devel pcre-devel zlib-devel # groupadd nginx # useradd -g nginx -s /bin/false -M nginx ./configure \   --prefix=/usr \   --sbin-path=/usr/sbin/nginx \   --conf-path=/etc/nginx/ngi.........

代码如下:

 /* skip flags */
+ long int lm;
+ time_t ims;
+ lm = strtol(p, NULL, 10);
+ if( r->headers_in.if_modified_since == NULL) {
+     ims = 0;
+ } else {
+     ims = ngx_http_parse_time(r->headers_in.if_modified_since->value.data,
+     r->headers_in.if_modified_since->value.len);
+ }
+ ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+ "TIEMPOS: lm=\"%d\" ims=\"%d\"", lm, ims);
+
         while (*p) {
             if (*p++ == ' ') {
                 goto length;

代码如下:

while (*p && *p++ != CR) { /* void */ }
+ r->headers_out.last_modified_time = lm;
         r->headers_out.content_length_n = ngx_atoof(len, p - len - 1);
         if (r->headers_out.content_length_n == -1) {
             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
 

代码如下:

  time_t t;
    time(&t);
    flags = t;

    if (! (flags
           && safe_strtol(tokens[3].value, &exptime_int)
           && safe_strtol(tokens[4].value, (int32_t *)&vlen))) {
        out_string(c, "CLIENT_ERROR bad command line format");
        return;
}

代码如下:

#禁止IP访问
server
{
listen 80 default;
server_name _;
return 500;
}

代码如下:

# yum install gcc openssl-devel pcre-devel zlib-devel

# groupadd nginx
# useradd -g nginx -s /bin/false -M nginx

./configure \
  --prefix=/usr \
  --sbin-path=/usr/sbin/nginx \
  --conf-path=/etc/nginx/nginx.conf \
  --error-log-path=/var/log/nginx/error.log \
  --http-log-path=/var/log/nginx/access.log \
  --pid-path=/var/run/nginx/nginx.pid  \
  --lock-path=/var/lock/nginx.lock \
  --user=nginx \
  --group=nginx \
  --with-http_ssl_module \
  --with-http_flv_module \
  --with-http_stub_status_module \
  --with-http_gzip_static_module \
  --http-client-body-temp-path=/var/tmp/nginx/client/ \
  --http-proxy-temp-path=/var/tmp/nginx/proxy/ \
  --http-fastcgi-temp-path=/var/tmp/nginx/fcgi/ \
  --with-pcre

make && make install

代码如下:

#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig: - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \
# proxy and IMAP/POP3 proxy server
# processname: nginx
# config: /etc/nginx/nginx.conf
# config: /etc/sysconfig/nginx
# pidfile: /var/run/nginx.pid
 
# Source function library.
. /etc/rc.d/init.d/functions
 
# Source networking configuration.
. /etc/sysconfig/network
 
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
 
nginx="/usr/sbin/nginx"
prog=$(basename $nginx)
 
NGINX_CONF_FILE="/etc/nginx/nginx.conf"
 
[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx
 
lockfile=/var/lock/subsys/nginx
 
make_dirs() {
   # make required directories
   user=`nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=\([^ ]*\).*/\1/g' -`
   options=`$nginx -V 2>&1 | grep 'configure arguments:'`
   for opt in $options; do
   if [ `echo $opt | grep '.*-temp-path'` ]; then
   value=`echo $opt | cut -d "=" -f 2`
   if [ ! -d "$value" ]; then
   # echo "creating" $value
   mkdir -p $value && chown -R $user $value
   fi
   fi
   done
}
 
start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
make_dirs
echo -n $"Starting $prog: "
daemon $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
 
stop() {
echo -n $"Stopping $prog: "
killproc $prog -QUIT
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
 
restart() {
configtest || return $?
stop
sleep 1
start
}
 
reload() {
configtest || return $?
echo -n $"Reloading $prog: "
killproc $nginx -HUP
RETVAL=$?
echo
}
 
force_reload() {
restart
}
 
configtest() {
  $nginx -t -c $NGINX_CONF_FILE
}
 
rh_status() {
status $prog
}
 
rh_status_q() {
rh_status >/dev/null 2>&1
}
 
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit 2
esac