从中间件 Vapor 中排除一些视图答案

【问题标题】：Exclude some views from middleware Vapor从中间件 Vapor 中排除一些视图
【发布时间】：2017-02-14 06:22:29
【问题描述】：

我已经创建了 Vapor 项目。我已经注册了两个视图和两个 API，如下所示。

    drop.get { req in
        return try drop.view.make("index.html")
    }

    drop.get("home") { req in
        return try drop.view.make("home.html")
    }

    // Register the GET request routes
    drop.get("appname") { request in
        return "Welcome to Swift Web service";
    }

    drop.get("appversion") { request in
        return "v1.0";
    }

中间件代码：

    // Added the Middleware version for request and response
    final class VersionMiddleware: Middleware {

        // Interact with request and response
        func respond(to request: Request, chainingTo next: Responder) throws -> Response {

            //Middleware is the perfect place to catch errors thrown from anywhere in the application.
            do {
                // Exclude the views from middleware
                if ( request.uri.path != "/") {
                    // The request has a 'Version' named token that equals "API \(httpVersion)"
                    guard request.headers["access_token"] == "\(publicAPIKey)" else {
                        throw Abort.custom(
                            status: .badRequest,
                            message: "Sorry, Wrong web service authendication!!"
                        ) // The request will be aborted.
                    }

                }
                let response = try next.respond(to: request)
                response.headers["Version"] = "API \(httpVersion)"
                return response
            } catch {
                throw Abort.custom(
                    status: .badRequest,
                    message: "Sorry, we were unable to query the Web service."
                )
            }
        }
    }

添加中间件配置：

    // Configure the middleware
    drop.addConfigurable(middleware: VersionMiddleware() as Middleware, name: "VersionMiddleware")

我的问题是：

每当用户尝试加载 home.html 时，它都应该验证中间件条件，如果我们加载 index.html 服务器将排除中间件验证。

与 API 中的相同：每当用户尝试加载“/appname”时，它应该验证中间件条件，如果我们加载“appversion”服务器将排除中间件验证。

我使用 request.uri.path != "/" 完成了这项工作。我们还有其他方法可以在 Vapor 中进行配置吗？

【问题讨论】：

标签： swift vapor

【解决方案1】：

你可以group一组路由并在那里分配中间件

drop.group(VersionMiddleware()) { group in
    drop.get("home") { req in
        return try drop.view.make("home.html")
    }

    // Register the GET request routes
    drop.get("appname") { request in
        return "Welcome to Swift Web service";
    }
}

drop.get { req in
    return try drop.view.make("index.html")
}

drop.get("appversion") { request in
    return "v1.0";
}

并且不要调用addConfigurable方法

【讨论】：

@Vignesh Kumar 你应该接受这个答案是正确的。