fix(endpoints): add the ability to update TLS for an existing endpoint (#784)

api/http/proxy.go

@@ -0,0 +1,67 @@
+package http
+
+import (
+	"net/http"
+	"net/url"
+
+	"github.com/orcaman/concurrent-map"
+	"github.com/portainer/portainer"
+)
+
+// ProxyService represents a service used to manage Docker proxies.
+type ProxyService struct {
+	proxyFactory *ProxyFactory
+	proxies      cmap.ConcurrentMap
+}
+
+// NewProxyService initializes a new ProxyService
+func NewProxyService(resourceControlService portainer.ResourceControlService) *ProxyService {
+	return &ProxyService{
+		proxies: cmap.New(),
+		proxyFactory: &ProxyFactory{
+			ResourceControlService: resourceControlService,
+		},
+	}
+}
+
+// CreateAndRegisterProxy creates a new HTTP reverse proxy and adds it to the registered proxies.
+// It can also be used to create a new HTTP reverse proxy and replace an already registered proxy.
+func (service *ProxyService) CreateAndRegisterProxy(endpoint *portainer.Endpoint) (http.Handler, error) {
+	var proxy http.Handler
+
+	endpointURL, err := url.Parse(endpoint.URL)
+	if err != nil {
+		return nil, err
+	}
+
+	if endpointURL.Scheme == "tcp" {
+		if endpoint.TLS {
+			proxy, err = service.proxyFactory.newHTTPSProxy(endpointURL, endpoint)
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			proxy = service.proxyFactory.newHTTPProxy(endpointURL)
+		}
+	} else {
+		// Assume unix:// scheme
+		proxy = service.proxyFactory.newSocketProxy(endpointURL.Path)
+	}
+
+	service.proxies.Set(string(endpoint.ID), proxy)
+	return proxy, nil
+}
+
+// GetProxy returns the proxy associated to a key
+func (service *ProxyService) GetProxy(key string) http.Handler {
+	proxy, ok := service.proxies.Get(key)
+	if !ok {
+		return nil
+	}
+	return proxy.(http.Handler)
+}
+
+// DeleteProxy deletes the proxy associated to a key
+func (service *ProxyService) DeleteProxy(key string) {
+	service.proxies.Remove(key)
+}