Update vendor, move to labstack/echo/v4 Fixes #698

vendor/github.com/labstack/echo/v4/group.go

@@ -0,0 +1,121 @@
+package echo
+
+import (
+	"net/http"
+	"path"
+)
+
+type (
+	// Group is a set of sub-routes for a specified route. It can be used for inner
+	// routes that share a common middleware or functionality that should be separate
+	// from the parent echo instance while still inheriting from it.
+	Group struct {
+		prefix     string
+		middleware []MiddlewareFunc
+		echo       *Echo
+	}
+)
+
+// Use implements `Echo#Use()` for sub-routes within the Group.
+func (g *Group) Use(middleware ...MiddlewareFunc) {
+	g.middleware = append(g.middleware, middleware...)
+	// Allow all requests to reach the group as they might get dropped if router
+	// doesn't find a match, making none of the group middleware process.
+	for _, p := range []string{"", "/*"} {
+		g.echo.Any(path.Clean(g.prefix+p), func(c Context) error {
+			return NotFoundHandler(c)
+		}, g.middleware...)
+	}
+}
+
+// CONNECT implements `Echo#CONNECT()` for sub-routes within the Group.
+func (g *Group) CONNECT(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodConnect, path, h, m...)
+}
+
+// DELETE implements `Echo#DELETE()` for sub-routes within the Group.
+func (g *Group) DELETE(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodDelete, path, h, m...)
+}
+
+// GET implements `Echo#GET()` for sub-routes within the Group.
+func (g *Group) GET(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodGet, path, h, m...)
+}
+
+// HEAD implements `Echo#HEAD()` for sub-routes within the Group.
+func (g *Group) HEAD(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodHead, path, h, m...)
+}
+
+// OPTIONS implements `Echo#OPTIONS()` for sub-routes within the Group.
+func (g *Group) OPTIONS(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodOptions, path, h, m...)
+}
+
+// PATCH implements `Echo#PATCH()` for sub-routes within the Group.
+func (g *Group) PATCH(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodPatch, path, h, m...)
+}
+
+// POST implements `Echo#POST()` for sub-routes within the Group.
+func (g *Group) POST(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodPost, path, h, m...)
+}
+
+// PUT implements `Echo#PUT()` for sub-routes within the Group.
+func (g *Group) PUT(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodPut, path, h, m...)
+}
+
+// TRACE implements `Echo#TRACE()` for sub-routes within the Group.
+func (g *Group) TRACE(path string, h HandlerFunc, m ...MiddlewareFunc) *Route {
+	return g.Add(http.MethodTrace, path, h, m...)
+}
+
+// Any implements `Echo#Any()` for sub-routes within the Group.
+func (g *Group) Any(path string, handler HandlerFunc, middleware ...MiddlewareFunc) []*Route {
+	routes := make([]*Route, len(methods))
+	for i, m := range methods {
+		routes[i] = g.Add(m, path, handler, middleware...)
+	}
+	return routes
+}
+
+// Match implements `Echo#Match()` for sub-routes within the Group.
+func (g *Group) Match(methods []string, path string, handler HandlerFunc, middleware ...MiddlewareFunc) []*Route {
+	routes := make([]*Route, len(methods))
+	for i, m := range methods {
+		routes[i] = g.Add(m, path, handler, middleware...)
+	}
+	return routes
+}
+
+// Group creates a new sub-group with prefix and optional sub-group-level middleware.
+func (g *Group) Group(prefix string, middleware ...MiddlewareFunc) *Group {
+	m := make([]MiddlewareFunc, 0, len(g.middleware)+len(middleware))
+	m = append(m, g.middleware...)
+	m = append(m, middleware...)
+	return g.echo.Group(g.prefix+prefix, m...)
+}
+
+// Static implements `Echo#Static()` for sub-routes within the Group.
+func (g *Group) Static(prefix, root string) {
+	static(g, prefix, root)
+}
+
+// File implements `Echo#File()` for sub-routes within the Group.
+func (g *Group) File(path, file string) {
+	g.echo.File(g.prefix+path, file)
+}
+
+// Add implements `Echo#Add()` for sub-routes within the Group.
+func (g *Group) Add(method, path string, handler HandlerFunc, middleware ...MiddlewareFunc) *Route {
+	// Combine into a new slice to avoid accidentally passing the same slice for
+	// multiple routes, which would lead to later add() calls overwriting the
+	// middleware from earlier calls.
+	m := make([]MiddlewareFunc, 0, len(g.middleware)+len(middleware))
+	m = append(m, g.middleware...)
+	m = append(m, middleware...)
+	return g.echo.Add(method, g.prefix+path, handler, m...)
+}