Various fixes/tweaks to HTTP placeholder variables and file matching

- Rename http.var.* -> http.vars.* to be more consistent
- Prefixing a path matcher with * now invokes simple suffix matching
- Handlers and matchers that need a root path default to {http.vars.root}
- Clean replacer output on the file matcher's file selection suffix

3 files changed, 16 insertions, 12 deletions

diff --git a/modules/caddyhttp/fileserver/caddyfile.go b/modules/caddyhttp/fileserver/caddyfile.go
index 7afcc9e..4622af2 100644
--- a/modules/caddyhttp/fileserver/caddyfile.go
+++ b/modules/caddyhttp/fileserver/caddyfile.go
@@ -17,9 +17,9 @@ package fileserver
 import (
 	"encoding/json"
 
-	"github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite"
 	"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
+	"github.com/caddyserver/caddy/v2/modules/caddyhttp/rewrite"
 )
 
 func init() {
@@ -71,11 +71,6 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
 		}
 	}
 
-	// if no root was configured explicitly, use site root
-	if fsrv.Root == "" {
-		fsrv.Root = "{http.var.root}"
-	}
-
 	// hide the Caddyfile (and any imported Caddyfiles)
 	if configFiles := h.Caddyfiles(); len(configFiles) > 0 {
 		for _, file := range configFiles {
@@ -104,7 +99,6 @@ func parseTryFiles(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error)
 
 	matcherSet := map[string]json.RawMessage{
 		"file": h.JSON(MatchFile{
-			Root:     "{http.var.root}",
 			TryFiles: try,
 		}, nil),
 	}
diff --git a/modules/caddyhttp/fileserver/matcher.go b/modules/caddyhttp/fileserver/matcher.go
index b091250..99e217e 100644
--- a/modules/caddyhttp/fileserver/matcher.go
+++ b/modules/caddyhttp/fileserver/matcher.go
@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"path"
 	"time"
 
 	"github.com/caddyserver/caddy/v2"
@@ -87,8 +88,13 @@ func (m *MatchFile) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 			}
 		}
 	}
+	return nil
+}
+
+// Provision sets up m's defaults.
+func (m *MatchFile) Provision(_ caddy.Context) error {
 	if m.Root == "" {
-		m.Root = "{http.var.root}"
+		m.Root = "{http.vars.root}"
 	}
 	return nil
 }
@@ -141,7 +147,7 @@ func (m MatchFile) selectFile(r *http.Request) (rel, abs string, matched bool) {
 	switch m.TryPolicy {
 	case "", tryPolicyFirstExist:
 		for _, f := range m.TryFiles {
-			suffix := repl.ReplaceAll(f, "")
+			suffix := path.Clean(repl.ReplaceAll(f, ""))
 			fullpath := sanitizedPathJoin(root, suffix)
 			if fileExists(fullpath) {
 				return suffix, fullpath, true
@@ -153,7 +159,7 @@ func (m MatchFile) selectFile(r *http.Request) (rel, abs string, matched bool) {
 		var largestFilename string
 		var largestSuffix string
 		for _, f := range m.TryFiles {
-			suffix := repl.ReplaceAll(f, "")
+			suffix := path.Clean(repl.ReplaceAll(f, ""))
 			fullpath := sanitizedPathJoin(root, suffix)
 			info, err := os.Stat(fullpath)
 			if err == nil && info.Size() > largestSize {
@@ -169,7 +175,7 @@ func (m MatchFile) selectFile(r *http.Request) (rel, abs string, matched bool) {
 		var smallestFilename string
 		var smallestSuffix string
 		for _, f := range m.TryFiles {
-			suffix := repl.ReplaceAll(f, "")
+			suffix := path.Clean(repl.ReplaceAll(f, ""))
 			fullpath := sanitizedPathJoin(root, suffix)
 			info, err := os.Stat(fullpath)
 			if err == nil && (smallestSize == 0 || info.Size() < smallestSize) {
@@ -185,7 +191,7 @@ func (m MatchFile) selectFile(r *http.Request) (rel, abs string, matched bool) {
 		var recentFilename string
 		var recentSuffix string
 		for _, f := range m.TryFiles {
-			suffix := repl.ReplaceAll(f, "")
+			suffix := path.Clean(repl.ReplaceAll(f, ""))
 			fullpath := sanitizedPathJoin(root, suffix)
 			info, err := os.Stat(fullpath)
 			if err == nil &&
diff --git a/modules/caddyhttp/fileserver/staticfiles.go b/modules/caddyhttp/fileserver/staticfiles.go
index cdac453..cfb79f8 100644
--- a/modules/caddyhttp/fileserver/staticfiles.go
+++ b/modules/caddyhttp/fileserver/staticfiles.go
@@ -57,6 +57,10 @@ func (FileServer) CaddyModule() caddy.ModuleInfo {
 
 // Provision sets up the static files responder.
 func (fsrv *FileServer) Provision(ctx caddy.Context) error {
+	if fsrv.Root == "" {
+		fsrv.Root = "{http.vars.root}"
+	}
+
 	if fsrv.IndexNames == nil {
 		fsrv.IndexNames = defaultIndexNames
 	}