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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package compositedav
import (
"fmt"
"log"
"net/http"
"path"
"strings"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"tailscale.com/tstest"
)
var parentPath = "/parent with spaces"
var childPath = "/parent with spaces/child.txt"
var parentResponse = `<D:response>
<D:href>/parent%20with%20spaces/</D:href>
<D:propstat>
<D:prop>
<D:getlastmodified>Mon, 29 Apr 2024 19:52:23 GMT</D:getlastmodified>
<D:creationdate>Fri, 19 Apr 2024 04:13:34 GMT</D:creationdate>
<D:resourcetype>
<D:collection xmlns:D="DAV:" />
</D:resourcetype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>`
var childResponse = `
<D:response>
<D:href>/parent%20with%20spaces/child.txt</D:href>
<D:propstat>
<D:prop>
<D:getlastmodified>Mon, 29 Apr 2024 19:52:23 GMT</D:getlastmodified>
<D:creationdate>Fri, 19 Apr 2024 04:13:34 GMT</D:creationdate>
<D:resourcetype>
<D:collection xmlns:D="DAV:" />
</D:resourcetype>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>`
var fullParent = []byte(
strings.ReplaceAll(
fmt.Sprintf(`<?xml version="1.0" encoding="UTF-8"?><D:multistatus xmlns:D="DAV:">%s%s</D:multistatus>`, parentResponse, childResponse),
"\n", ""))
var partialParent = []byte(
strings.ReplaceAll(
fmt.Sprintf(`<?xml version="1.0" encoding="UTF-8"?><D:multistatus xmlns:D="DAV:">%s</D:multistatus>`, parentResponse),
"\n", ""))
var fullChild = []byte(
strings.ReplaceAll(
fmt.Sprintf(`<?xml version="1.0" encoding="UTF-8"?><D:multistatus xmlns:D="DAV:">%s</D:multistatus>`, childResponse),
"\n", ""))
func TestStatCacheNoTimeout(t *testing.T) {
// Make sure we don't leak goroutines
tstest.ResourceCheck(t)
c := &StatCache{TTL: 5 * time.Second}
defer c.stop()
// check get before set
fetched := c.get(childPath, 0)
if fetched != nil {
t.Errorf("got %v, want nil", fetched)
}
// set new stat
ce := newCacheEntry(http.StatusMultiStatus, fullChild)
c.set(childPath, 0, ce)
fetched = c.get(childPath, 0)
if diff := cmp.Diff(fetched, ce); diff != "" {
t.Errorf("should have gotten cached value; (-got+want):%v", diff)
}
// fetch stat again, should still be cached
fetched = c.get(childPath, 0)
if diff := cmp.Diff(fetched, ce); diff != "" {
t.Errorf("should still have gotten cached value; (-got+want):%v", diff)
}
}
func TestStatCacheTimeout(t *testing.T) {
// Make sure we don't leak goroutines
tstest.ResourceCheck(t)
c := &StatCache{TTL: 250 * time.Millisecond}
defer c.stop()
// set new stat
ce := newCacheEntry(http.StatusMultiStatus, fullChild)
c.set(childPath, 0, ce)
fetched := c.get(childPath, 0)
if diff := cmp.Diff(fetched, ce); diff != "" {
t.Errorf("should have gotten cached value; (-got+want):%v", diff)
}
// wait for cache to expire and refetch stat, should be empty now
time.Sleep(c.TTL * 2)
fetched = c.get(childPath, 0)
if fetched != nil {
t.Errorf("cached value should have expired")
}
c.set(childPath, 0, ce)
// invalidate the cache and make sure nothing is returned
c.invalidate()
fetched = c.get(childPath, 0)
if fetched != nil {
t.Errorf("invalidate should have cleared cached value")
}
}
func TestParentChildRelationship(t *testing.T) {
// Make sure we don't leak goroutines
tstest.ResourceCheck(t)
c := &StatCache{TTL: 24 * time.Hour} // don't expire
defer c.stop()
missingParentPath := "/missingparent"
unparseableParentPath := "/unparseable"
c.set(parentPath, 1, newCacheEntry(http.StatusMultiStatus, fullParent))
c.set(missingParentPath, 1, newCacheEntry(http.StatusNotFound, nil))
c.set(unparseableParentPath, 1, newCacheEntry(http.StatusMultiStatus, []byte("<this will not parse")))
tests := []struct {
path string
depth int
want *cacheEntry
}{
{
path: parentPath,
depth: 1,
want: newCacheEntry(http.StatusMultiStatus, fullParent),
},
{
path: parentPath,
depth: 0,
want: newCacheEntry(http.StatusMultiStatus, partialParent),
},
{
path: childPath,
depth: 0,
want: newCacheEntry(http.StatusMultiStatus, fullChild),
},
{
path: path.Join(parentPath, "nonexistent.txt"),
depth: 0,
want: notFound,
},
{
path: missingParentPath,
depth: 1,
want: notFound,
},
{
path: missingParentPath,
depth: 0,
want: notFound,
},
{
path: path.Join(missingParentPath, "filename.txt"),
depth: 0,
want: notFound,
},
{
path: unparseableParentPath,
depth: 1,
want: nil,
},
{
path: unparseableParentPath,
depth: 0,
want: nil,
},
{
path: path.Join(unparseableParentPath, "filename.txt"),
depth: 0,
want: nil,
},
{
path: "/unknown",
depth: 1,
want: nil,
},
}
for _, test := range tests {
t.Run(fmt.Sprintf("%d%s", test.depth, test.path), func(t *testing.T) {
got := c.get(test.path, test.depth)
if diff := cmp.Diff(got, test.want); diff != "" {
t.Errorf("unexpected cached value; (-got+want):%v", diff)
log.Printf("want\n%s", test.want.Raw)
log.Printf("got\n%s", got.Raw)
}
})
}
}
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