grunt-contrib-connect 中间件 CORS 解决方案，具有 keepalive true

对于我的本地开发系统，我尝试使用 grunt-contrib-connect 为前端资产提供服务。我需要一个在 Firefox 中使用字体的跨域解决方案。服务器运行得很好，但我似乎无法设置标头。

我正在使用 grunt-contrib-connect 0.7.1 版本。

connect: {
        dev: {
            options: {
                port: '9001',
                base: 'build',
                hostname: 'localhost',
                keepalive: true,
                middleware: function(connect, options, middlewares) {
                    // inject a custom middleware into the array of default middlewares
                    // this is likely the easiest way for other grunt plugins to
                    // extend the behavior of grunt-contrib-connect
                    middlewares.push(function(req, res, next) {
                        req.setHeader('Access-Control-Allow-Origin', '*');
                        req.setHeader('Access-Control-Allow-Methods', '*');
                        return next();
                    });

                    return middlewares;
                }
            }
        }
}

使用keepalive与中间件有问题吗？

遗憾的是没有人更早对此做出回应。

您的代码看起来就像文档中一样，但是您将标头添加到req代替res.

The second problem is that the docs mislead you into(fixed) https://github.com/gruntjs/grunt-contrib-connect/issues/114#event-145223615 adding your middleware with .push. Your code is not called at all, because something before it is doing a res.end and/or not calling next().

您的固定代码将如下所示：

    middleware: function (connect, options, middlewares) {
                    // inject a custom middleware 
                    middlewares.unshift(function (req, res, next) {
                        res.setHeader('Access-Control-Allow-Origin', '*');
                        res.setHeader('Access-Control-Allow-Methods', '*');
                        //a console.log('foo') here is helpful to see if it runs
                        return next();
                    });

                    return middlewares;
                }