#!/bin/bash

# 配置源目录和备份目录
source_dir="/etc/nginx/conf.d"
backup_dir="/www/mnt/backup/nginx"

# 创建备份目录（如果不存在）
mkdir -p "$backup_dir"

# 获取当前日期（格式：YYYY-MM-DD）
current_date=$(date +%Y-%m-%d)

# 压缩配置文件到临时tar包
tar_filename="/tmp/nginx_config_backup_$current_date.tar.gz"
tar -czf "$tar_filename" -C "$source_dir" .

# 检查上一个备份是否存在且与当前备份不同
last_backup=$(ls -t "$backup_dir" | head -1)
if [ -n "$last_backup" ]; then
    # 解压上一个备份和当前备份
    mkdir -p /tmp/last_backup /tmp/current_backup
    tar -xzf "$backup_dir/$last_backup" -C /tmp/last_backup
    tar -xzf "$tar_filename" -C /tmp/current_backup

    # 使用diff命令比较两个目录中的文件差异
    diff_output=$(diff -r /tmp/last_backup /tmp/current_backup)

    # 清理临时目录
    rm -r /tmp/last_backup /tmp/current_backup

    if [ -z "$diff_output" ]; then
        # 上一个备份与当前备份相同，抛弃当前备份
        echo "No changes in Nginx configuration. Discarding backup."
        rm "$tar_filename"
        exit 0
    fi
fi

# 移动当前备份到备份目录
mv "$tar_filename" "$backup_dir"

# 删除多余的备份（保留最多10个备份）
backup_count=$(ls -1 "$backup_dir" | wc -l)
if [ "$backup_count" -gt 10 ]; then
    oldest_backup=$(ls -t "$backup_dir" | tail -1)
    rm "$backup_dir/$oldest_backup"
fi

echo "Nginx configuration backup completed."

crontab -e

5     3       *       *       *       /opt/shell/nginx/nginx_config_backup.sh

【3位】【45位 全球路由前缀】【16位 子网ID】【64位 接口ID】

ping -6 240e:386:924:f4e1::c47

curl -g [240e:386:924:f4e1:fe67:3f72:5318:a114]

curl -g -v [240e:386:924:f4e1:fe67:3f72:5318:a114]

"id","name","age"
"1","John",25
"2","Alice",30

<person>
    <id>1</id>
    <name>John</name>
    <age>25</age>
</person>

{
  "id": 1,
  "name": "John",
  "age": 25
}

id: 1
name: John
age: 25

config redirect             
    option name 'Allow-Wan-SSH-61622'
    option src 'wan'
    option src_dport '61622'
    option dest 'lan'
    option dest_port '22'
    option proto 'tcp'           
    option target 'DNAT'

iptables -I INPUT -s 123.240.202.234 -j ACCEPT

config rule
        option name 'Company Ip White List'
        option src 'wan'
        option src_ip '123.240.202.234'
        option family 'ipv4'
        option target 'ACCEPT'

vi /etc/config/firewall 

config rule
    option name 'Allow-Wan-SSH-22'
    option src  'wan'
    option dest_port  '22'
    option target  'ACCEPT'
    option proto  'tcp'

service firewall restart
# 或
/etc/init.d/firewall restart

config rule
        option src              wan
        option dest_port        22
        option target           ACCEPT
        option proto            tcp

config redirect
        option src       wan
        option src_dport 80
        option proto     tcp
        option dest_ip   192.168.1.10

config redirect
        option src              lan
        option dest             wan
        option src_ip           10.55.34.85
        option src_dip          63.240.161.99
        option dest_port        123
        option target           SNAT

config redirect
        option src              wan
        option src_dport        80
        option dest             lan
        option dest_port        80
        option proto            tcp

config rule
        option src              lan
        option dest             wan
        option dest_ip          123.45.67.89
        option target           REJECT

config rule
        option src              lan
        option dest             wan
        option src_mac          00:00:00:00:00
        option target           REJECT

config rule
        option src              lan
        option dest             wan
        option dest_port        1000-1100
        option proto            'tcp udp'
        option target           REJECT

config redirect
	option src              lan
	option proto            tcp
	option src_dport        80
	option dest_port        3128

config redirect
        option src              lan
        option proto            tcp
        option src_ip           !192.168.1.100
        option src_dport        80
        option dest_ip          192.168.1.100
        option dest_port        3128

config redirect
	option src              wan
	option proto            all
	option dest_ip          192.168.1.2

ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("'Hello World'");
String message = (String) exp.getValue();

ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("'Hello World'.concat('!')");
String message = (String) exp.getValue();

ExpressionParser parser = new SpelExpressionParser();
// invokes 'getBytes().length'
Expression exp = parser.parseExpression("'Hello World'.bytes.length");  
int length = (Integer) exp.getValue();

ExpressionParser parser = new SpelExpressionParser();
Expression exp = parser.parseExpression("new String('hello world').toUpperCase()");
String message = exp.getValue(String.class);

class Simple {
    public List<Boolean> booleanList = new ArrayList<Boolean>();
}
    	
Simple simple = new Simple();

simple.booleanList.add(true);

StandardEvaluationContext simpleContext = new StandardEvaluationContext(simple);

// false is passed in here as a string.  SpEL and the conversion service will 
// correctly recognize that it needs to be a Boolean and convert it
parser.parseExpression("booleanList[0]").setValue(simpleContext, "false");

// b will be false
Boolean b = simple.booleanList.get(0);

ExpressionParser parser = new SpelExpressionParser();

// evals to "Hello World"
String helloWorld = (String) parser.parseExpression("'Hello World'").getValue(); 

double avogadrosNumber  = (Double) parser.parseExpression("6.0221415E+23").getValue();  

// evals to 2147483647
int maxValue = (Integer) parser.parseExpression("0x7FFFFFFF").getValue();  

boolean trueValue = (Boolean) parser.parseExpression("true").getValue();

Object nullValue = parser.parseExpression("null").getValue();

int year = (Integer) parser.parseExpression("Birthdate.Year + 1900").getValue(context); 

String city = (String) parser.parseExpression("placeOfBirth.City").getValue(context);

ExpressionParser parser = new SpelExpressionParser();

// Inventions Array
StandardEvaluationContext teslaContext = new StandardEvaluationContext(tesla);

// evaluates to "Induction motor"
String invention = parser.parseExpression("inventions[3]").getValue(teslaContext, 
                                                                    String.class); 

// Members List
StandardEvaluationContext societyContext = new StandardEvaluationContext(ieee);

// evaluates to "Nikola Tesla"
String name = parser.parseExpression("Members[0].Name").getValue(societyContext, String.class);

// List and Array navigation
// evaluates to "Wireless communication"
String invention = parser.parseExpression("Members[0].Inventions[6]").getValue(societyContext,
                                                                               String.class);

// Officer's Dictionary

Inventor pupin = parser.parseExpression("Officers['president']").getValue(societyContext, 
                                                                          Inventor.class);

// evaluates to "Idvor"
String city = 
    parser.parseExpression("Officers['president'].PlaceOfBirth.City").getValue(societyContext,
                                                                               String.class);

// setting values
parser.parseExpression("Officers['advisors'][0].PlaceOfBirth.Country").setValue(societyContext,
                                                                                "Croatia");

// string literal, evaluates to "bc"
String c = parser.parseExpression("'abc'.substring(2, 3)").getValue(String.class);

// evaluates to true
boolean isMember = parser.parseExpression("isMember('Mihajlo Pupin')").getValue(societyContext,
                                                                                Boolean.class);

// 计算结果为真
boolean trueValue = parser.parseExpression( " 2 == 2" ).getValue(Boolean.class );

// 计算结果为假
boolean falseValue = parser.parseExpression( " 2 < -5.0" ).getValue(Boolean.class );

// 计算结果为真
boolean trueValue = parser.parseExpression( " 'black' < 'block'" ).getValue(Boolean.class );

// evaluates to false
boolean falseValue = parser.parseExpression("'xyz' instanceof T(int)").getValue(Boolean.class);

// evaluates to true
boolean trueValue = 
     parser.parseExpression("'5.00' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean.class);

//evaluates to false
boolean falseValue = 
     parser.parseExpression("'5.0067' matches '^-?\\d+(\\.\\d{2})?$'").getValue(Boolean.class);

// -- AND --

// evaluates to false
boolean falseValue = parser.parseExpression("true and false").getValue(Boolean.class);

// evaluates to true
String expression =  "isMember('Nikola Tesla') and isMember('Mihajlo Pupin')";
boolean trueValue = parser.parseExpression(expression).getValue(societyContext, Boolean.class);

// -- OR --

// evaluates to true
boolean trueValue = parser.parseExpression("true or false").getValue(Boolean.class);

// evaluates to true
String expression =  "isMember('Nikola Tesla') or isMember('Albert Einstien')";
boolean trueValue = parser.parseExpression(expression).getValue(societyContext, Boolean.class);

// -- NOT --

// evaluates to false
boolean falseValue = parser.parseExpression("!true").getValue(Boolean.class);


// -- AND and NOT --
String expression =  "isMember('Nikola Tesla') and !isMember('Mihajlo Pupin')";
boolean falseValue = parser.parseExpression(expression).getValue(societyContext, Boolean.class);

// Addition
int two = parser.parseExpression("1 + 1").getValue(Integer.class); // 2

String testString = 
   parser.parseExpression("'test' + ' ' + 'string'").getValue(String.class);  // 'test string'

// Subtraction
int four =  parser.parseExpression("1 - -3").getValue(Integer.class); // 4

double d = parser.parseExpression("1000.00 - 1e4").getValue(Double.class); // -9000

// Multiplication
int six =  parser.parseExpression("-2 * -3").getValue(Integer.class); // 6

double twentyFour = parser.parseExpression("2.0 * 3e0 * 4").getValue(Double.class); // 24.0

// Division
int minusTwo =  parser.parseExpression("6 / -3").getValue(Integer.class); // -2

double one = parser.parseExpression("8.0 / 4e0 / 2").getValue(Double.class); // 1.0

// Modulus
int three =  parser.parseExpression("7 % 4").getValue(Integer.class); // 3

int one = parser.parseExpression("8 / 5 % 2").getValue(Integer.class); // 1

// Operator precedence
int minusTwentyOne = parser.parseExpression("1+2-3*8").getValue(Integer.class); // -21

Inventor tesla = new Inventor("Nikola Tesla", "Serbian");
StandardEvaluationContext context = new StandardEvaluationContext(tesla);
context.setVariable("newName", "Mike Tesla");

parser.parseExpression("Name = #newName").getValue(context);

System.out.println(tesla.getName()) // "Mike Tesla"

spring:
  cloud:
    inetutils:
      ignored-interfaces: eth0

spring.cloud.inetutils.preferred-networks=10.34.12

spring.cloud.nacos.discovery.networkInterface = eth0

spring:
  cloud:
    nacos:
      discovery:
        ip: 10.13.19.91
        

sudo mv /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt.bak && sudo curl -Lko /etc/ssl/certs/ca-certificates.crt https://curl.se/ca/cacert.pem

sudo -i

mv /usr/bin/ffmpeg /usr/bin/ffmpeg_back

ln -s /volume1/@appstore/ffmpeg/bin/ffmpeg /usr/bin/ffmpeg

@Component
public class TestApplicationRunner implements ApplicationRunner {

    @Autowired
    private NacosDiscoveryProperties nacosDiscoveryProperties;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("启动后运行");
        System.out.println(nacosDiscoveryProperties.getIp());
        System.out.println(nacosDiscoveryProperties.getPort());
    }

}