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V2EX  ›  Node.js

VUE 前后端分离两个问题

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  •   SlipStupig · 2017-12-26 22:17:10 +08:00 · 4746 次点击
    这是一个创建于 390 天前的主题,其中的信息可能已经有所发展或是发生改变。

    我现在项目,前端使用 vue 做页面,后端使用 python

    1. npm run build 后无法显示背景图片(背景图片使用 CSS 写在模板的style标签里面的)

    2.使用 axio 请求后端无法将 cookie 设置到浏览器,网上看了一圈方法都不行,withCredentials=true也设置了,但是提示我错误

    Failed to load http://localhost:8088/g: The 'Access-Control-Allow-Origin' header has a value 'http://localhost:8088' that is not equal to the supplied origin. Origin 'http://localhost:8080' is therefore not allowed access.
    

    后端设置:

            self.set_header('Access-Control-Allow-Credentials', True)
            self.set_header("Access-Control-Allow-Origin", "http://localhost:8088")
            self.set_header("Access-Control-Allow-Headers", "x-requested-with")
            self.set_header('Access-Control-Allow-Methods', 'POST, GET, OPTIONS')
    

    怎么才能解决呢?

    第 1 条附言  ·  2017-12-27 09:32:40 +08:00

    开始我cros没设置对,后来v友提示,应该修改cros,然后修改了之后,发现cookie根本没发送到服务端 xtOoV.md.png

    32 回复  |  直到 2017-12-28 08:38:41 +08:00
        1
    greatonce   2017-12-26 22:28:57 +08:00   ♥ 1
    Failed to load http://localhost:8088/g: The 'Access-Control-Allow-Origin' header has a value 'http://localhost:8088' that is not equal to the supplied origin. Origin 'http://localhost:8080' is therefore not allowed access.

    self.set_header("Access-Control-Allow-Origin", "http://localhost:8088")


    你用 8080 访问,设置的是 8088 当然不允许访问
    Origin 'http://localhost:8080' is therefore not allowed access.
        2
    ooTwToo   2017-12-26 23:00:33 +08:00
    哈哈哈,楼上真相了,不过你本地可以 Origin 为 * 呀
        3
    SlipStupig   2017-12-26 23:01:45 +08:00
    @greatonce 我改了之后,后端依然收不到 cookie
        4
    SlipStupig   2017-12-26 23:02:08 +08:00
    @ooTwToo 不行的,要发送 cookie
        5
    TabGre   2017-12-27 07:50:03 +08:00 via iPhone
    可以考虑 nginx 转发
        6
    arfaWong   2017-12-27 08:00:51 +08:00
    开发环境可以用 webpack 的 proxyTable 将请求转发到后端
    生产环境使用 nginx 将请求转发到后端
        7
    SlipStupig   2017-12-27 08:24:20 +08:00
    @arfaWong build 后背景图片没了
        8
    guoyang   2017-12-27 08:26:18 +08:00
    1.首先 CORS,你的方案是没有错的,并且你的头如 1 楼所说 origin 要设置正确;
    2.建议你现在 http://www.test-cors.org/中调通 CORS 的跨站测试;
    3.前端也要开启 Credentials,VUE 的设置大概如下
    import axios from 'axios'
    Vue.prototype.$http.defaults.withCredentials = true
        9
    SlipStupig   2017-12-27 09:04:42 +08:00
    @guoyang cors 已经设置正确了,vue cert 我也设置了,目前依然报错:

    Failed to load http://localhost:8088/a: Redirect from 'http://localhost:8088/a' to 'http://localhost:8088/?next=%2Fa' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access.
        10
    twotiger   2017-12-27 09:09:01 +08:00
    登录后记得刷新页面
        11
    rsl140   2017-12-27 09:13:18 +08:00
    axios.defaults.baseURL = 'http://localhost:8088';
        12
    qiuyk   2017-12-27 09:17:27 +08:00
    @SlipStupig 哥你这端口还是没改呀哈哈哈
        13
    SlipStupig   2017-12-27 09:25:12 +08:00
    @qiuyk 我改了啊,没用啊
    self.set_header('Access-Control-Allow-Credentials', 'true')
    self.set_header("Access-Control-Allow-Origin", "http://localhost:8080")
    self.set_header("Access-Control-Allow-Headers", "x-requested-with")
    self.set_header('Access-Control-Allow-Methods', 'POST, GET, OPTIONS')
        14
    MaxBear   2017-12-27 09:26:35 +08:00 via Android
    跨域了,用 node 代理一下
    可以参考 http://www.bear777.com/blog/vue-vue-axios-vue-resource-vue
        15
    favicon   2017-12-27 09:31:20 +08:00
    webpack 的 proxyTable 里添加 cookieDomainRewrite: "localhost:8080" 不用谢
        16
    jeremaihloo   2017-12-27 09:35:15 +08:00
    webpack 的 proxyTable 呀,楼上很多人都说了
        17
    robinlovemaggie   2017-12-27 09:44:04 +08:00
    前后端分离为啥不考虑用 Token 做 Authrization?
        18
    469054193   2017-12-27 09:46:51 +08:00
    为什么进来变成黑色的了
        19
    Terry05   2017-12-27 09:49:33 +08:00
    这里怎么成全黑了,看着好难受
        20
    changkong   2017-12-27 09:58:06 +08:00
    css 图片路径的问题,vue-cli 是在 build->utils.js 里的`ExtractTextPlugin`改下`publicPath`,
    ```
    if (options.extract) {
    return ExtractTextPlugin.extract({
    use: loaders,
    publicPath: '../../', //注意: 此处根据路径, 自动更改
    fallback: 'vue-style-loader'
    })
    } else {
    return ['vue-style-loader'].concat(loaders)
    }
    ```
        21
    yanqing07   2017-12-27 09:59:48 +08:00
    你收不到 cookie。也可能是 vue 的 ajax 发送时,没带 cookie。不一定是 py 的锅
        22
    SlipStupig   2017-12-27 11:04:16 +08:00
    @changkong 改了后给个个 warning

    Tip: built files are meant to be served over an HTTP server.
    Opening index.html over file:// won't work.
        23
    vivinBear   2017-12-27 11:11:40 +08:00   ♥ 1
    main.js
    Axios.defaults.withCredentials = true

    build/utils.js

    if (options.extract) {
    return ExtractTextPlugin.extract({
    use: loaders,
    fallback: 'vue-style-loader',
    publicPath: '../../' /// 加上这一行
    })
    } else {
    return ['vue-style-loader'].concat(loaders)
    }

    config/index.js
    把 build 的 assetsPublicPath 的值改成""
    就可以了
        24
    vivinBear   2017-12-27 11:12:07 +08:00
    @SlipStupig 看我上面的,你的这些问题我都遇到过,并且都解决了
        25
    vivinBear   2017-12-27 11:12:16 +08:00
    亲测可行
        26
    moxiaonai   2017-12-27 11:29:25 +08:00
    楼上正解。样式问题是编译后的路径不对

    跨域问题,服务端设置 cors。'Access-Control-Allow-Origin'必须为具体域名,不能为*。
    前端 Axios.defaults.withCredentials = true,也必须允许接收跨域的 cookie

        27
    SlipStupig   2017-12-27 11:33:12 +08:00
    @vivinBear 能留个联系方式不,我还是没解决
        28
    SlipStupig   2017-12-27 11:37:22 +08:00
    @vivinBear 我那个背景图片地址是个 BASE64 编码地址:url(data:image/png;base64,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),跟我设置的完全不一样。我的配置

    build/utils.js:
    // Extract CSS when that option is specified
    // (which is the case during production build)
    if (options.extract) {
    return ExtractTextPlugin.extract({
    use: loaders,
    fallback: 'vue-style-loader',
    publicPath: '../../' /// 加上这一行
    })
    } else {
    return ['vue-style-loader'].concat(loaders)
    }

    config/index.js:
    build: {
    // Template for index.html
    index: path.resolve(__dirname, '../dist/index.html'),
    // Paths
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: "",

    /**
    * Source Maps
    */

    productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
    }

    CSS:
    body {
    height: 100%;
    width: 100%;
    position: fixed;
    margin: 0;
    padding: 0;
    border: 0;
    vertical-align: baseline;
    background: url('../assets/login_bg.jpg') no-repeat;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    }
        29
    vivinBear   2017-12-27 13:41:11 +08:00
    @SlipStupig 那这个就和前端没什么关系了吧,你现在还有什么问题,把错误贴出来
        30
    SlipStupig   2017-12-27 14:52:38 +08:00
    @vivinBear 背景图片无法显示啊
        31
    vivinBear   2017-12-27 21:27:38 +08:00
    @SlipStupig 你给我个联系方式,然后我试着帮你看看
        32
    v2gg   2017-12-28 08:38:40 +08:00 via Android
    @SlipStupig build 之后显示不出来可以 F12 看看是什么原因,可能是相对路径的锅
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