1 files changed, 85 insertions, 0 deletions
diff --git a/finger.go b/finger.go
new file mode 100644
index 0000000..6ae82dd
--- /dev/null
+++ b/finger.go
@@ -0,0 +1,85 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strings"
+
+	sr "tildegit.org/tjp/sliderule"
+	"tildegit.org/tjp/sliderule/contrib/cgi"
+	"tildegit.org/tjp/sliderule/finger"
+	"tildegit.org/tjp/sliderule/logging"
+)
+
+func buildFingerServer(server Server, config *Configuration) (sr.Server, error) {
+	addr := fmt.Sprintf("%s:%d", server.IP.String(), server.Port)
+
+	_, info, _, errlog := Loggers(config)
+	_ = info.Log("msg", "building finger server", "addr", addr)
+
+	if len(server.Routes) != 1 {
+		return nil, fmt.Errorf("finger server must have 1 route directive, found %d", len(server.Routes))
+	}
+
+	return finger.NewServer(
+		context.Background(),
+		"",
+		"tcp",
+		addr,
+		logging.LogRequests(info)(fingerHandler(server.Routes[0])),
+		errlog,
+	)
+}
+
+func fingerHandler(route RouteDirective) sr.Handler {
+	if route.Type != "static" && route.Type != "cgi" {
+		panic("invalid finger route type '" + route.Type + "'")
+	}
+
+	return sr.HandlerFunc(func(ctx context.Context, request *sr.Request) *sr.Response {
+		u, err := user.Lookup(strings.TrimPrefix(request.Path, "/"))
+		if err != nil {
+			return nil
+		}
+
+		var fpath string
+		if strings.HasPrefix(route.FsPath, "~/") {
+			fpath = filepath.Join(u.HomeDir, route.FsPath[2:])
+		} else {
+			fpath = strings.Replace(route.FsPath, "~", u.Username, 1)
+		}
+
+		st, err := os.Stat(fpath)
+		if err != nil {
+			return finger.Error(err.Error())
+		}
+		if !st.Mode().IsRegular() {
+			return nil
+		}
+
+		if st.Mode()&5 == 5 && (route.Modifiers.Exec || route.Type == "cgi") {
+			buf, code, err := cgi.RunCGI(ctx, request, fpath, "/", nil)
+			if err != nil {
+				return finger.Error("execution error")
+			}
+			if code != 0 {
+				return finger.Error(fmt.Sprintf("execution error: code %d", code))
+			}
+
+			return finger.Success(buf)
+		}
+
+		if route.Type != "static" {
+			return nil
+		}
+
+		file, err := os.Open(fpath)
+		if err != nil {
+			return finger.Error(err.Error())
+		}
+		return finger.Success(file)
+	})
+}