一个通过shell脚本实现首页静态化的例子

【背景】网站首页是由多个组成，为减少服务器SSI(server side include)的压力，新网站需要对首页作静态化，以满足用户访问的性能需求。

【实现】通过部署在服务器上的shell脚本，在服务器端定时访问服务器的内部首页路径，保存为html, 存储到web服务的首页路径下。

1）首页下载函数

indexSave.sh

#!/bin/bash
# parameter1=homeUrl;
# parameter2=targetDir;
# parameter3=workDir;
homeUrl=$1
targetDir=$2
workDir=$3
tempFile1=$workDir"index.txt"
tempFile2=$workDir"index.html"
flagText="</body>"
time=`date +"%Y-%m-%d %H:%M:%S"`
date=`date +%Y_%m_%d`
rm -rf ${tempFile1}
rm -rf ${tempFile2}
validCount=0  #define the valid flag count
a=(0,1,2,3,4,5,6) #define the check flag array
a[0]="<html>"
a[1]="</html>"
a[2]="<title>XXXXX</title>"
a[3]="<head>"
a[4]="</head>"
a[5]="<body>"
a[6]="</body>"
num=${#a[@]}
let minsize=30000
let maxsize=40000 
wget --cache=off ${homeUrl}  -O${tempFile1}
if [ -f ${tempFile1} ];then
       echo "We have downloaded "${tempFile1}" from "${homeUrl} "[${time}]">>run$date.log
       while read line
         do
                temp=$line 
		for var in ${a[@]};
		do
			aa=`echo $temp|grep $var|wc -l`
			if [ $aa -gt 0  ];then
     				echo "We have checked Valid flag${validCount}:"$temp>>run$date.log
     				let validCount++
			fi 
		done
		bb=`echo $temp|grep $flagText|wc -l`
		if [ $bb = 0 ]
		then
			echo ${temp} >> ${tempFile2}
		else
			#echo "contains flag "${flagText}" append staticTime "${time}>>run$date.log
			temp='<span staticTime="'${time}'"  style="display:none"></span>'${temp} 
			echo  ${temp} >> ${tempFile2}
		fi           
          done < ${tempFile1}
else
	echo "Fetal Error,we haven't  got the "${tempFile1}" from "${homeUrl} "[${time}]">>run$date.log
fi    
s=$(du -b $tempFile2|awk '{print $1}')
echo "We have generated the final file "$tempFile2",file size is "$s" bytes">>run$date.log
if [ $s -gt $minsize -a $s -lt $maxsize ];
then
	echo "We have checked the final file size in bytes,it is between $minSize and $maxSize">>run$date.log
	if [ $validCount -eq $num ];then
		echo "We have checked all valid flags, total "$validCount" items">>run$date.log
		cp -f ${tempFile2} ${targetDir}
		time=`date +"%Y-%m-%d %H:%M:%S"`
     		echo "We have saved ${tempFile2} into ${targetDir}[${time}]">>run$date.log
   	else
    		echo "Fetal Error,$tempFile2 checked flag is not expected [${time}]">>run$date.log
   	fi
else
    	echo "Fetal Error,$tempFile2 size is not expected [${time}]">>run$date.log
fi
#

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">2）调度函数staticMain.sh</span>

#!/bin/bash
homeUrl="http://localhost:8090/home"
targetDir="/projects/prenewsite/cn/page/home/"
workDir="/temp/temp2/"
count=1
while [ $count -ge 0 ]
	do	
		
		source ${workDir}indexSave.sh $homeUrl $targetDir $workDir
		sleep 20
        done

3）执行命令脚本

nohup sh staticMain.sh >/dev/null 2>&1 &

#注意：在[] 表达式中，常见的>,<需要加转义字符，表示字符串大小比较，以acill码位置作为比较。不直接支持<>运算符，还有逻辑运算符|| && 它需要用-a[and] –o[or]表示

一个通过shell脚本实现首页静态化的例子

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