行业资讯

Vue、SprinBoot开发运维的一些坑和知识集锦

发布时间：2020-03-03 14:11:43 作者：BlueMiaomiao
来源：网络 阅读：769

一、完美解决Vue2.0+Axios开发生产环境跨域问题

由于博主主要是做后端开发和自动化运维的，因此，前端基本面向同学和搜索引擎编程...这次彻底搞出了一个简洁优雅的Vue和Axios配合的跨域方案，适合开发环境和生产环境！

（1）在config/index.js中配置开发环境跨域

proxyTable: {
    '/api': {
        target: 'https://211.64.32.228:8899/',
        secure: false,
        changeOrigin: true,
        pathRewrite: {
            '^/api': ''
        },
        headers: {
            Referer: 'https://211.64.32.228:8899'
        }
    }
}

（2）在main.js中配置自动选择

import axios from 'axios'
import QS from 'qs'

Vue.prototype.$axios = axios
Vue.prototype.$qs = QS

Vue.prototype.baseUrl = process.env.NODE_ENV === "production" ? "https://211.64.32.228:8899" : "/api"

（3）在Vue文件中使用Axios

this.axios({
    method: 'post',
    url: this.baseUrl + '/helloworld',
    data: {},
    headers: {}
}).then((response) => {
    // do some
}).catch((error) => {
    // do some
});

（4）SpringBoot配置允许跨域

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;

@Configuration
public class CorsConfig {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }
}

二、SpringBoot中AES+Base64加解密用户登录凭据

这年头，md5是能反解的，再老也不能掉牙呀..

import org.apache.tomcat.util.codec.binary.Base64;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;

// 使用方法：
// PasswordUtil.Encrypt(String)
// PasswordUtil.Decrypt(String)
public class PasswordUtil {

    // openssl rand -hex 16
    private static String salt = "38350e78e96b83e894b59cc9953af122";

    public static String Encrypt(String password) throws Exception {
        byte[] raw = salt.getBytes(StandardCharsets.UTF_8);
        SecretKeySpec sRawSpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, sRawSpec);
        byte[] encrypted = cipher.doFinal(password.getBytes(StandardCharsets.UTF_8));
        return new Base64().encodeToString(encrypted);
    }

    public static String Decrypt(String password) throws Exception{
        byte[] raw = salt.getBytes(StandardCharsets.UTF_8);
        SecretKeySpec sRawSpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, sRawSpec);
        byte[] encrypted = new Base64().decode(password);
        byte[] original = cipher.doFinal(encrypted);
        return new String(original, StandardCharsets.UTF_8);
    }
}

三、纯CSS自定义超简洁文件上传控件input

主要是解决自定义CSS样式问题和Vue上传文件的问题...注释就不写了，静下心来稍微一看就懂！

<template>
  <div class="upload">
    <div class="upload-demo-show">
      <input accept="image/png,image/gif,image/jpeg" type="file" class="upload-demo-button" @change="handleUploadDemoButtonChange($event)">
      <i class="el-icon-upload upload-btn-icon" :></i>
      <div class="upload-demo-text" :>{{uploadTips}}</div>
    </div>
    <div class="upload-button">
      <el-button :loading="isProcessUpload" type="success" icon="el-icon-right" circle @click="handleProcessUpload"></el-button>
    </div>
  </div>
</template>

<script>
    export default {
        name: "Upload",
        data: function () {
            return {
                uploadImageObject: '',
                isProcessUpload: false,
                uploadTips: '点击上传',
                uploadTipsStyle: {
                    'color': 'gray'
                }
            }
        },
        mounted() {
            this.$store.dispatch('commitNormalStepNumber', 2)
        },
        methods: {
            handleUploadDemoButtonChange: function (e) {
                if ((e.target.files[0].size / 1024) >= 400) {
                    this.$message.error('上传的文件超过指定的大小, 请重新选择');
                } else {
                    this.uploadImageObject = e.target.files[0];
                    this.uploadTips = e.target.files[0].name;
                    this.uploadTipsStyle.color = '#409EFF';
                }

            },
            handleProcessUpload: function () {

                this.isProcessUpload = true;

                // 使用FormData解决POST远程API出现获取不到参数问题
                let formData = new FormData();
                formData.append('uuid', this.$store.getters.getFormUsername);
                formData.append('file', this.uploadImageObject);

                this.$axios({
                    url: this.baseUrl + '/upload/image',
                    method: 'post',
                    headers: {
                        'Content-Type': 'multipart/form-data',
                        token: this.$store.getters.getToken
                    },
                    data: formData
                }).then((response) => {
                    if (response.data === "OK") {
                        this.isProcessUpload = false;
                        this.$router.push({
                            path: '/finish'
                        });
                    } else if (response.data === "UNAUTHORIZED"){
                        this.$message.error('请登录后重试');
                    } else if (response.data === "INTERNAL_SERVER_ERROR") {
                        this.$message.error('很抱歉, 我们发生了一些错误');
                    } else if (response.data === "BAD_REQUEST") {
                        this.$message.error('你的请求有误, 文件可能有点儿问题');
                    } else {
                        this.$message.error('产生了无法预知的错误, 请重新登陆');
                        console.log(response.data)
                    }
                }).catch((err) => {
                    this.$message.error('网络请求出错');
                    console.log(err)
                });

                this.isProcessUpload = false;
            }
        }
    }
</script>

<style scoped>
  .upload {
    width: 50%;
    margin: 0 auto;
    padding-top: 35px;
  }

  .upload-button {
    padding-top: 25px;
    text-align: center;
  }

  .upload-demo-button {
    width: 349px;
    height: 149px;
    opacity: 0;
  }

  .upload-demo-button:hover {
    cursor: pointer;
  }

  .upload-demo-show {
    border-radius: 5px;
    border: lightgray 1px dashed;
    width: 350px;
    height: 150px;
    margin: 0 auto;
    position: relative;
  }

  .upload-btn-icon {
    position: absolute;
    top: 15%;
    left: 40%;
    font-size: 50pt;
    z-index: -1;
  }

  .upload-demo-text {
    z-index: -1;
    position: absolute;
    top: 58%;
    width: 250px;
    text-align: center;
    left: 50%;
    font-size: 10pt;
    margin-left: -125px;
  }
</style>

四、Vuex最佳实践

（1）定义store/index.js，事实上应该事先模块化，但是我太懒了。

import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

const state = {
  token: ''
};

const getters = {
  getToken(state) {
    return state.token
  }
};

const mutations = {
  setToken(state, token) {
    state.token = token
  }
};

const actions = {
  commitToken({commit}, token) {
    return commit('setToken', token)
  }
};

const store = new Vuex.Store(
  {
    state,
    getters,
    mutations,
    actions
  }
);

export default store;

（2）在main.js中引用

import store from './store'

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  components: {App},
  template: '<App/>',
  store
})

（3）在Vue组件中引用

this.$store.dispatch('commitToken', value);  // 向Store中存储数据
this.$store.getters.getToken;                // 读取Store中的数据

五、Vue-router跳转

然而，官方文档是写的很明确的，但是我懒得翻官方文档...

this.$router.push({
    path: '/normal'
});

六、Nginx配合SpringBoot实现HTTPS强转和API网关负载均衡

user  nginx;
worker_processes  16;

error_log  logs/error.log;

pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    keepalive_timeout  65;

    gzip  on;

    // 设置反向代理
    upstream apiserver {
        server 127.0.0.1:8090 weight=1;
        server 127.0.0.1:8091 weight=1;
        server 127.0.0.1:8092 weight=1;
        server 127.0.0.1:8093 weight=1;
    }

    server {
        listen       80;
        server_name  upload-image;

        // 设置HTTPS强转
        rewrite ^(.*)$ https://$host$1 permanent;
    }

    // API接口使用HTTPS
    server {
        listen       8899 ssl;
        server_name  upload-image-api;

        // 配置HTTPS
        ssl_certificate      ../ssl/server.crt;
        ssl_certificate_key  ../ssl/server.key;

        ssl_session_cache    shared:SSL:1m;
        ssl_session_timeout  5m;

        ssl_ciphers ALL:!DH:!EXPORT:!RC4:+HIGH:+MEDIUM:-LOW:!aNULL:!eNULL;
        ssl_prefer_server_ciphers  on;

        // 添加支持的HTTPS协议
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

        location / {
            proxy_pass http://apiserver;
        }
    }

    server {
        // 将前端静态分发设置跳转到该接口
        listen       443 ssl;
        server_name  upload-image-ssl;

        ssl_certificate      ../ssl/server.crt;
        ssl_certificate_key  ../ssl/server.key;

        ssl_session_cache    shared:SSL:1m;
        ssl_session_timeout  5m;

        ssl_ciphers ALL:!DH:!EXPORT:!RC4:+HIGH:+MEDIUM:-LOW:!aNULL:!eNULL;
        ssl_prefer_server_ciphers  on;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

        location / {
            root   html;
            index  index.html index.htm;    
        }

        error_page  404              /404.html;
        error_page   500 502 503 504  /50x.html;

        location = /50x.html {
            root   html;
        }
    }

}

七、Vue组件水平垂直都居中

就是这个问题，我一直都记不住怎么做，但是我一直都能百度到，连Google都不用...

（1） index.html，设置在style标签

html, body {
    margin: 0;
    padding: 0;
}

（2） 组件样式

.box {
    top: 50%;
    left: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    min-width: 450px;
    max-width: 550px;
    min-height: 500px;
    max-height: 550px;
}

八、Vue与PC端摄像头交互

最近自己用Caffe训练了一个人脸识别的神经网络，以后咱也可以人脸登录了~
So，先搞定PC的Web端的摄像头再说...因为电脑拍出来的照片是不太顺眼的，因此进行了镜像翻转，
但是，你就是那么丑...是我的CSS让你变好看了，哈哈哈~

<template>
  <div class="login-with-facedetection-main box">
    <div class="login-with-facedetection-main-head">
      <img src="../../assets/qimo2-blue.svg" alt="" width="65" height="65">
    </div>
    <div class="login-with-title">青芒云(Qimo Cloud)控制台</div>
    <div class="login-with-subtitle">人脸检测登录，点击图片开始检测</div>
    <div ></div>
    <div class="login-with-form" @click="handleFaceDetection" v-loading="hasLoginFormLoading">
      <video class="video-box" src="" autoplay="autoplay" v-if="hasCameraOpen"></video>
      <img class="photo-box" :src="faceImage" alt="" v-if="hasTakePhoto">
      <canvas id="canvas" width="270" height="270" ></canvas>
    </div>
    <LoginType/>
  </div>
</template>

<script>
    import LoginType from "../common/LoginType";

    export default {
        name: "LoginWithFaceDetection",
        components: {LoginType},
        data: function () {
            return {
                streamPicture: '',
                faceImage: '',
                hasCameraOpen: true,
                hasTakePhoto: false,
                faceImageFile: '',
                hasLoginFormLoading: false,
                clickTimes: 0
            }
        },
        methods: {
            handleFaceDetection: function () {
                if (this.clickTimes === 0) {
                    let video = document.querySelector('video');
                    this.takePhoto();
                    this.closeCamera();
                    this.postFaceDetection();
                    console.log("Face De");
                    this.clickTimes = 1;
                }
                // TODO：显示弹窗，重复的提交
            },
            connectToCamera: function () {
                let self = this;
                navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
                if (navigator.getUserMedia) {
                    // 调用用户媒体设备, 访问摄像头
                    navigator.getUserMedia({
                        video: {
                            width: 270,
                            height: 270
                        }
                    }, function (stream) {
                        let video = document.querySelector('video');
                        video.srcObject = stream;
                        self.streamPicture = stream;
                        video.onloadedmetadata = function (e) {
                            video.play();
                        };
                    }, function (err) {
                        // TODO: 显示错误弹窗，不支持的媒体类型
                    })
                } else {
                    // TODO：显示错误弹窗，无法访问摄像头
                }
            },
            closeCamera: function () {
                this.streamPicture.getTracks()[0].stop();
            },
            takePhoto: function () {
                let video = document.querySelector('video');
                let canvas = document.getElementById('canvas');
                let context = canvas.getContext('2d');
                context.drawImage(video, 0, 0, 270, 270);
                let image = canvas.toDataURL('image/png');
                this.hasCameraOpen = false;
                this.hasTakePhoto = true;
                this.faceImage = image;
                this.faceImageFile = this.dataURLtoFile(image, 'face-detection.png')
            },
            dataURLtoFile: function (dataurl, filename) {
                let arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
                    bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
                while (n--) {
                    u8arr[n] = bstr.charCodeAt(n);
                }
                return new File([u8arr], filename, {type: mime});
            },
            postFaceDetection: function () {
                this.hasLoginFormLoading = true;

                // TODO：发送图片进行识别

                setInterval(() => {
                    this.hasLoginFormLoading = false;
                    clearInterval();
                }, 5000);
            }
        },
        mounted() {
            this.connectToCamera();
        },
        destroyed() {
            this.closeCamera();
        }
    }
</script>

<style scoped>

  .photo-box {
    margin-top: 0;
    width: 270px;
    height: 270px;
    border-radius: 20px;
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg); /* Safari 和 Chrome */
    -moz-transform: rotateY(180deg);
  }

  .video-box {
    transform: rotateY(180deg);
    -webkit-transform: rotateY(180deg); /* Safari 和 Chrome */
    -moz-transform: rotateY(180deg);
    margin-top: 0;
    width: 270px;
    height: 270px;
    object-fit: contain;
    border-radius: 20px;
  }

  .login-with-facedetection-main {
    width: 450px;
    height: 500px;
    box-shadow: 0 0 10px lightgrey;
  }

  .login-with-facedetection-main-head {
    width: 100%;
    height: 65px;
    padding-top: 35px;
    text-align: center;
  }

  .login-with-form {
    width: 270px;
    margin: 0 auto;
    height: 270px;
    text-align: center;
    background-color: #F1F3F4;
    border-radius: 20px;
  }

  .login-with-title {
    font-size: 15pt;
    text-align: center;
    width: 100%;
    padding-top: 20px;
  }

  .login-with-subtitle {
    font-size: 11pt;
    text-align: center;
    width: 100%;
    padding-top: 5px;
  }

  .box {
    top: 50%;
    left: 50%;
    position: absolute;
    transform: translate(-50%, -50%);
    min-width: 450px;
    max-width: 550px;
    min-height: 500px;
    max-height: 550px;
  }
</style>

九、Vue中组价高度自适应

让这个组件的高度总是等于浏览器窗口高度！

（1）组件绑定CSS样式

:

（2） JavaScript数据动态绑定

export default {
    name: "Admin",
    data: function () {
        return {
            isCollapse: true,
            sidebarStyle: {
                'height': ''
            }
        }
    },
    methods: {
        redressHeight: function () {
            this.sidebarStyle.height = window.innerHeight  + 'px';
        }
    },
    created() {
        window.addEventListener('resize', this.redressHeight);
        this.redressHeight();
    },
    destroyed() {
        window.removeEventListener('resize', this.redressHeight);
    }
}

持续更新中...

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