986f076276
Add a new generic container registry client via a new `container` package. Use this to create a command line utility as well as a new upload target for container registries. The code uses the github.com/containers/* project and packages to interact with container registires that is also used by skopeo, podman et al. One if the dependencies is `proglottis/gpgme` that is using cgo to bind libgpgme, so we have to add the corresponding devel package to the BuildRequires as well as installing it on CI. Checks will follow later via an integration test.
74 lines
2.6 KiB
Go
74 lines
2.6 KiB
Go
package mux
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import (
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"net/http"
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"strings"
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)
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// MiddlewareFunc is a function which receives an http.Handler and returns another http.Handler.
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// Typically, the returned handler is a closure which does something with the http.ResponseWriter and http.Request passed
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// to it, and then calls the handler passed as parameter to the MiddlewareFunc.
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type MiddlewareFunc func(http.Handler) http.Handler
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// middleware interface is anything which implements a MiddlewareFunc named Middleware.
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type middleware interface {
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Middleware(handler http.Handler) http.Handler
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}
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// Middleware allows MiddlewareFunc to implement the middleware interface.
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func (mw MiddlewareFunc) Middleware(handler http.Handler) http.Handler {
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return mw(handler)
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}
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// Use appends a MiddlewareFunc to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.
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func (r *Router) Use(mwf ...MiddlewareFunc) {
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for _, fn := range mwf {
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r.middlewares = append(r.middlewares, fn)
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}
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}
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// useInterface appends a middleware to the chain. Middleware can be used to intercept or otherwise modify requests and/or responses, and are executed in the order that they are applied to the Router.
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func (r *Router) useInterface(mw middleware) {
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r.middlewares = append(r.middlewares, mw)
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}
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// CORSMethodMiddleware automatically sets the Access-Control-Allow-Methods response header
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// on requests for routes that have an OPTIONS method matcher to all the method matchers on
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// the route. Routes that do not explicitly handle OPTIONS requests will not be processed
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// by the middleware. See examples for usage.
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func CORSMethodMiddleware(r *Router) MiddlewareFunc {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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allMethods, err := getAllMethodsForRoute(r, req)
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if err == nil {
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for _, v := range allMethods {
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if v == http.MethodOptions {
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w.Header().Set("Access-Control-Allow-Methods", strings.Join(allMethods, ","))
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}
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}
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}
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next.ServeHTTP(w, req)
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})
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}
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}
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// getAllMethodsForRoute returns all the methods from method matchers matching a given
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// request.
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func getAllMethodsForRoute(r *Router, req *http.Request) ([]string, error) {
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var allMethods []string
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for _, route := range r.routes {
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var match RouteMatch
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if route.Match(req, &match) || match.MatchErr == ErrMethodMismatch {
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methods, err := route.GetMethods()
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if err != nil {
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return nil, err
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}
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allMethods = append(allMethods, methods...)
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}
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}
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return allMethods, nil
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}
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