opencv_cpp_480

更新：2025-10-12

下载地址 opencv-4.8.0-windows.exe

解压 opencv-4.8.0-windows.exe 到指定的位置 D:\develop\opencv

VS 配置 opencv 环境 （Release X64）

vs2022 属性管理器 没有 Microsoft.cpp.x64.user,可以直接点击 Release| x64 是一样的。

  1. 配置包含目录

    “公共包含目录” 是属性表 (.props) 级别的设置，影响所有使用该属性表的项目。

    “包含目录” 是项目 (.vcxproj) 级别的设置，只影响当前项目。

    VC++ 目录 -> 常规 -> 库目录

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    D:\develop\opencv\build\include
    D:\develop\opencv\build\include\opencv2

  2. 配置库目录

    VC++ 目录 -> 常规 -> 库目录

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    D:\develop\opencv\build\x64\vc16\lib

  3. 配置链接器

    链接器->输入->附加依赖项

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    opencv_world480.lib

  4. 配置环境变量(系统path中)、重启VS

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    D:\develop\opencv\build\x64\vc16\bin
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Websocket 认证

更新：2025-09-29

方式1、方式2可以混用，否则会出现握手无响应（是因为有个 checkStartsWith 参数需要设置为 true）

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io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandshakeHandler#channelRead
    
io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker13#newHandshakeResponse

方式1 基于 url 参数方式

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const socket = new WebSocket('ws://127.0.0.1:8080/ws?token=xxx')
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@Override
    protected void initChannel(SocketChannel socketChannel) throws Exception {
        ChannelPipeline pipeline = socketChannel.pipeline();
//        pipeline.addLast(new LoggingHandler(LogLevel.INFO));

        // 因为使用 HTTP 协议，所以需要 HTTP编码器，解码器
        // WebSocket 握手完成后，HTTP 相关的 handler（如 HttpServerCodec）会被移除，后续通信直接使用 WebSocket 帧
        pipeline.addLast(new HttpServerCodec());

        // 以块方式，添加 chunkedWriter 处理器
        pipeline.addLast(new ChunkedWriteHandler());

        /*
         * 1. http数据在传输中是分段的，HttpObjectAggregator 可以把多个段聚合起来
         * 2. 这就是为什么当浏览器发送大量数据时，就会发出多次 http请求的原因
         */
        pipeline.addLast(new HttpObjectAggregator(1024 * 512));

        // 添加WebSocket消息压缩处理器
        // 会报错
        //  RSV != 0 and no extension negotiated, RSV:4
//        pipeline.addLast(new WebSocketServerCompressionHandler());

        // 保存用户ip
        // pipeline.addLast(new HttpHeadersHandler());

//        pipeline.addLast(new LifeCyCleHandler());

        //设置一个空闲状态处理程序（心跳机制），读空闲，写空闲，读写空闲
        pipeline.addLast(new IdleStateHandler(120, 0, 0));

        // 自定义参数处理器，必须放在 new WebSocketServerProtocolHandler() 处理器之前
        pipeline.addLast("auth", authUrlHandler);
        // WebSocket协议处理器，关键配置
        pipeline.addLast(new WebSocketServerProtocolHandler(
                "/ws",  // WebSocket路径
                null,   // 子协议，不指定
                true,   // 允许扩展
                65536,  // 最大帧大小
                false,  // 不允许掩码
                true    // 握手超时后关闭连接
        ));
        pipeline.addLast(new WebSocketHandshakeCompleteHandler());
        pipeline.addLast(new NettyChatHandler());  //添加自定义handler
    }
more >>
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二进制、八进制、十六进制

更新：2025-07-19

二进制转八进制

3个二进制位1组，不够前面补0

4 2 1 组合

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// 0111 = 0x07 
// 000 0 0 + 0 + 0 = 0
// 001 1 0 + 0 + 1 = 1
// 010 2 0 + 2 + 0 = 2
// 011 3 0 + 2 + 1 = 3
// 100 4 4 + 0 + 0 = 4
// 101 5 4 + 0 + 1 = 5
// 110 6 4 + 2 + 0 = 6
// 111 7 4 + 2 + 1 = 7

二进制转十六进制

4个二进制位1组，不够前面补0

8 4 2 1 组合

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// 1111 = 0x0f 
// 0000 00 0 + 0 + 0 + 0 = 0
// 0001 01 0 + 0 + 0 + 1 = 1
// 0010 02 0 + 0 + 2 + 0 = 2
// 0011 03 0 + 0 + 2 + 1 = 3
// 0100 04 0 + 4 + 0 + 0 = 4
// 0101 05 0 + 4 + 0 + 1 = 5
// 0110 06 0 + 4 + 2 + 0 = 6
// 0111 07 0 + 4 + 2 + 1 = 7
// 1000 08 8 + 0 + 0 + 0 = 8
// 1001 09 8 + 0 + 0 + 1 = 9
// 1010 0a 8 + 0 + 2 + 0 = 10
// 1011 0b 8 + 0 + 2 + 1 = 11
// 1100 0c 8 + 4 + 0 + 0 = 12
// 1101 0d 8 + 4 + 0 + 1 = 13
// 1110 0e 8 + 4 + 2 + 0 = 14
// 1111 0f 8 + 4 + 2 + 1 = 15

二进制转十进制

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// 128, 64, 32, 16, 8, 4, 2, 1

// 0001 0000 => 0x10
// 0001 0000 => 16(10)
// 16 + 0

// 0111 1111 => 0x7f
// 0111 1111 => 127(10)
// 64+32+16 15 => 127
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Rocky Linux 9.6

更新：2025-07-19

配置静态IP、dns 跟gateway一样即可，不然没法上外网

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cd /etc/NetworkManager/system-connections

[root@localhost system-connections]# cat ens33.nmconnection 
[connection]
id=ens33
uuid=4d6ca82b-eb68-34f6-a6c8-bad245dc86d0
type=ethernet
autoconnect-priority=-999
interface-name=ens33
timestamp=1752923027

[ethernet]

[ipv4]
address1=192.168.18.96/24
gateway=192.168.18.2
dns=192.168.18.2
method=manual

[ipv6]
addr-gen-mode=eui64
method=auto

[proxy]

## 方式1 重启网络
nmcli connection reload         # 重新加载配置文件（确保修改生效）
nmcli connection down ens33     # 关闭连接
nmcli connection up ens33       # 重新启用连接

## 方式1 远程连接推荐这个
systemctl restart NetworkManager  # 重启服务（所有连接会短暂断开）

开启 root 远程连接

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# 查看ssh状态
systemctl status sshd

# 修改配置文件
vi /etc/ssh/sshd_config
# 这里去掉注释 改为 yes
PermitRootLoin yes

# 重启服务
systemctl restart sshd
more >>
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RestClient RestTemplate

更新：2025-06-21

https://docs.spring.io/spring-framework/reference/integration/rest-clients.html

RestTemplate method RestClient equivalent
getForObject(String, Class, Object…) get() .uri(String, Object…) .retrieve() .body(Class)
getForObject(String, Class, Map) get() .uri(String, Map) .retrieve() .body(Class)
getForObject(URI, Class) get() .uri(URI) .retrieve() .body(Class)
getForEntity(String, Class, Object…) get() .uri(String, Object…) .retrieve() .toEntity(Class)
getForEntity(String, Class, Map) get() .uri(String, Map) .retrieve() .toEntity(Class)
getForEntity(URI, Class) get() .uri(URI) .retrieve() .toEntity(Class)
headForHeaders(String, Object…) head() .uri(String, Object…) .retrieve() .toBodilessEntity() .getHeaders()
headForHeaders(String, Map) head() .uri(String, Map) .retrieve() .toBodilessEntity() .getHeaders()
headForHeaders(URI) head() .uri(URI) .retrieve() .toBodilessEntity() .getHeaders()
postForLocation(String, Object, Object…) post() .uri(String, Object…) .body(Object).retrieve() .toBodilessEntity() .getLocation()
postForLocation(String, Object, Map) post() .uri(String, Map) .body(Object) .retrieve() .toBodilessEntity() .getLocation()
postForLocation(URI, Object) post() .uri(URI) .body(Object) .retrieve() .toBodilessEntity() .getLocation()
postForObject(String, Object, Class, Object…) post() .uri(String, Object…) .body(Object) .retrieve() .body(Class)
postForObject(String, Object, Class, Map) post() .uri(String, Map) .body(Object) .retrieve() .body(Class)
postForObject(URI, Object, Class) post() .uri(URI) .body(Object) .retrieve() .body(Class)
postForEntity(String, Object, Class, Object…) post() .uri(String, Object…) .body(Object) .retrieve() .toEntity(Class)
postForEntity(String, Object, Class, Map) post() .uri(String, Map) .body(Object) .retrieve() .toEntity(Class)
postForEntity(URI, Object, Class) post() .uri(URI) .body(Object) .retrieve() .toEntity(Class)
put(String, Object, Object…) put() .uri(String, Object…) .body(Object) .retrieve() .toBodilessEntity()
put(String, Object, Map) put() .uri(String, Map) .body(Object) .retrieve() .toBodilessEntity()
put(URI, Object) put() .uri(URI) .body(Object) .retrieve() .toBodilessEntity()
patchForObject(String, Object, Class, Object…) patch() .uri(String, Object…) .body(Object) .retrieve() .body(Class)
patchForObject(String, Object, Class, Map) patch() .uri(String, Map) .body(Object) .retrieve() .body(Class)
patchForObject(URI, Object, Class) patch() .uri(URI) .body(Object) .retrieve() .body(Class)
delete(String, Object…) delete() .uri(String, Object…) .retrieve() .toBodilessEntity()
delete(String, Map) delete() .uri(String, Map) .retrieve() .toBodilessEntity()
delete(URI) delete() .uri(URI) .retrieve() .toBodilessEntity()
optionsForAllow(String, Object…) options() .uri(String, Object…) .retrieve() .toBodilessEntity() .getAllow()
optionsForAllow(String, Map) options() .uri(String, Map) .retrieve() .toBodilessEntity() .getAllow()
optionsForAllow(URI) options() .uri(URI) .retrieve() .toBodilessEntity() .getAllow()
exchange(String, HttpMethod, HttpEntity, Class, Object…) method(HttpMethod) .uri(String, Object…) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(Class) [1]
exchange(String, HttpMethod, HttpEntity, Class, Map) method(HttpMethod) .uri(String, Map) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(Class) [1]
exchange(URI, HttpMethod, HttpEntity, Class) method(HttpMethod) .uri(URI) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(Class) [1]
exchange(String, HttpMethod, HttpEntity, ParameterizedTypeReference, Object…) method(HttpMethod) .uri(String, Object…) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(ParameterizedTypeReference) [1]
exchange(String, HttpMethod, HttpEntity, ParameterizedTypeReference, Map) method(HttpMethod) .uri(String, Map) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(ParameterizedTypeReference) [1]
exchange(URI, HttpMethod, HttpEntity, ParameterizedTypeReference) method(HttpMethod) .uri(URI) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(ParameterizedTypeReference) [1]
exchange(RequestEntity, Class) method(HttpMethod) .uri(URI) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(Class) [2]
exchange(RequestEntity, ParameterizedTypeReference) method(HttpMethod) .uri(URI) .headers(Consumer<HttpHeaders>) .body(Object) .retrieve() .toEntity(ParameterizedTypeReference) [2]
execute(String, HttpMethod, RequestCallback, ResponseExtractor, Object…) method(HttpMethod) .uri(String, Object…) .exchange(ExchangeFunction)
execute(String, HttpMethod, RequestCallback, ResponseExtractor, Map) method(HttpMethod) .uri(String, Map) .exchange(ExchangeFunction)
execute(URI, HttpMethod, RequestCallback, ResponseExtractor) method(HttpMethod) .uri(URI) .exchange(ExchangeFunction)
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Redis ssl

更新：2025-06-21

生成根 CA 证书

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openssl genrsa -out ca.key 4096
openssl req -x509 -new -nodes -sha256 -key ca.key -days 3650 -subj '/C=CN/ST=Beijing/L=Beijing/O=Arukas IO/OU=Redis Server/CN=redis.vim.io' -out ca.crt

生成服务端证书

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openssl genrsa -out redis.key 4096

-- 签发申请
openssl req -new -sha256 -key redis.key -subj '/C=CN/ST=Beijing/L=Beijing/O=Arukas IO/OU=Redis Server/CN=redis.vim.io' -addext "subjectAltName = IP:127.0.0.1" -out server.csr

openssl x509 -req -sha256 -in server.csr -CA ca.crt -CAkey ca.key -CAserial ca.txt -CAcreateserial -days 3650 -extfile <(printf "subjectAltName=IP:127.0.0.1") -out redis.crt

#查看证书
openssl x509 -in redis.crt -text -noout

生成客户端证书

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openssl genrsa -out client.key 4096

-- 签发申请
openssl req -new -key client.key -out client.csr

openssl x509 -req -days 3650 -in client.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out client.crt

其它

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more >>
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rust

更新：2025-05-27

安装

环境变量添加
%CARGO_HOME%\bin

方式1

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set CARGO_HOME=D:\develop\rust\.cargo
set RUSTUP_HOME=D:\develop\rust\.rustup

或者环境变量设置好也可以

rustup-init.exe

方式2

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rustup-init.exe
默认会安装到 %USERPROFILE%\.cargo 和 %USERPROFILE%\.rustup

将 .cargo 和 .rustup 文件夹移动到目标位置(如 D:\Rust\)

CARGO_HOME = D:\develop\rust\.cargo
RUSTUP_HOME = D:\develop\rust\.rustup
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    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

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