X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/5a420beeb6c64efc3ca0ef13d4ab9ac6c654c3ab..aba81749d2477043232b82300c0ce15548b61888:/services/ws/permission.go

diff --git a/services/ws/permission.go b/services/ws/permission.go
index b2b962c7ce..f71ca61167 100644
--- a/services/ws/permission.go
+++ b/services/ws/permission.go
@@ -1,11 +1,17 @@
-package main
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+package ws
 
 import (
+	"context"
 	"net/http"
 	"net/url"
 	"time"
 
-	"git.curoverse.com/arvados.git/sdk/go/arvados"
+	"git.arvados.org/arvados.git/sdk/go/arvados"
+	"git.arvados.org/arvados.git/sdk/go/ctxlog"
 )
 
 const (
@@ -15,53 +21,94 @@ const (
 
 type permChecker interface {
 	SetToken(token string)
-	Check(uuid string) (bool, error)
+	Check(ctx context.Context, uuid string) (bool, error)
 }
 
-func NewPermChecker(ac arvados.Client) permChecker {
-	ac.AuthToken = ""
+func newPermChecker(ac *arvados.Client) permChecker {
 	return &cachingPermChecker{
-		Client:     &ac,
-		cache:      make(map[string]time.Time),
+		ac:         ac,
+		token:      "-",
+		cache:      make(map[string]cacheEnt),
 		maxCurrent: 16,
 	}
 }
 
+type cacheEnt struct {
+	time.Time
+	allowed bool
+}
+
 type cachingPermChecker struct {
-	*arvados.Client
-	cache      map[string]time.Time
+	ac         *arvados.Client
+	token      string
+	cache      map[string]cacheEnt
 	maxCurrent int
+
+	nChecks  uint64
+	nMisses  uint64
+	nInvalid uint64
 }
 
 func (pc *cachingPermChecker) SetToken(token string) {
-	pc.Client.AuthToken = token
+	if pc.token == token {
+		return
+	}
+	pc.token = token
+	pc.cache = make(map[string]cacheEnt)
 }
 
-func (pc *cachingPermChecker) Check(uuid string) (bool, error) {
+func (pc *cachingPermChecker) Check(ctx context.Context, uuid string) (bool, error) {
+	pc.nChecks++
+	logger := ctxlog.FromContext(ctx).
+		WithField("token", pc.token).
+		WithField("uuid", uuid)
 	pc.tidy()
-	if t, ok := pc.cache[uuid]; ok && time.Now().Sub(t) < maxPermCacheAge {
-		debugLogf("perm ok (cached): %+q %+q", pc.Client.AuthToken, uuid)
-		return true, nil
+	now := time.Now()
+	if perm, ok := pc.cache[uuid]; ok && now.Sub(perm.Time) < maxPermCacheAge {
+		logger.WithField("allowed", perm.allowed).Debug("cache hit")
+		return perm.allowed, nil
 	}
-	var buf map[string]interface{}
-	path, err := pc.PathForUUID("get", uuid)
+
+	path, err := pc.ac.PathForUUID("get", uuid)
 	if err != nil {
+		pc.nInvalid++
 		return false, err
 	}
-	err = pc.RequestAndDecode(&buf, "GET", path, nil, url.Values{
-		"select": {`["uuid"]`},
+
+	pc.nMisses++
+	ctx = arvados.ContextWithAuthorization(ctx, "Bearer "+pc.token)
+	ctx, cancel := context.WithDeadline(ctx, time.Now().Add(time.Minute))
+	defer cancel()
+	var buf map[string]interface{}
+	err = pc.ac.RequestAndDecodeContext(ctx, &buf, "GET", path, nil, url.Values{
+		"include_trash": {"true"},
+		"select":        {`["uuid"]`},
 	})
-	if err, ok := err.(arvados.TransactionError); ok && err.StatusCode == http.StatusNotFound {
-		debugLogf("perm err: %+q %+q: %s", pc.Client.AuthToken, uuid, err)
-		return false, nil
-	}
-	if err != nil {
-		debugLogf("perm !ok: %+q %+q", pc.Client.AuthToken, uuid)
+
+	var allowed bool
+	if err == nil {
+		allowed = true
+	} else if txErr, ok := err.(*arvados.TransactionError); ok && pc.isNotAllowed(txErr.StatusCode) {
+		allowed = false
+	} else {
+		// If "context deadline exceeded", "client
+		// disconnected", HTTP 5xx, network error, etc., don't
+		// cache the result.
+		logger.WithError(err).Error("lookup error")
 		return false, err
 	}
-	debugLogf("perm ok: %+q %+q", pc.Client.AuthToken, uuid)
-	pc.cache[uuid] = time.Now()
-	return true, nil
+	logger.WithField("allowed", allowed).Debug("cache miss")
+	pc.cache[uuid] = cacheEnt{Time: now, allowed: allowed}
+	return allowed, nil
+}
+
+func (pc *cachingPermChecker) isNotAllowed(status int) bool {
+	switch status {
+	case http.StatusForbidden, http.StatusUnauthorized, http.StatusNotFound:
+		return true
+	default:
+		return false
+	}
 }
 
 func (pc *cachingPermChecker) tidy() {