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client-go/rest: fix finalURLTemplate for url base == "/"

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In some environments, where url base is "/", it can cause all paths to
be presented in metrics with "{prefix}" as `groupIndex` is with the wrong
index. To fix the behavior in such environments, it was added a
conditional branch to check if the URL base is "/" and, thus, print the
metrics with the correct path, for example "api/v1/nodes/{name}" instead
of "{prefix}".

Fixes: 99248b8fe1fe ("Rewrite finalURLTemplate used only for metrics because of dynamic client change")
Signed-off-by: André Martins <aanm90@gmail.com>

Kubernetes-commit: c039b02fa7281fc061455e23b6530ed8b4d19645
This commit is contained in:
André Martins 2019-02-21 20:25:36 +01:00 committed by Kubernetes Publisher
parent 1eb2027cd5
commit 2396a52017
2 changed files with 48 additions and 5 deletions
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20
rest/request.go
View File

@ -511,13 +511,23 @@ func (r Request) finalURLTemplate() url.URL {
}
r.params = newParams
url := r.URL()
segments := strings.Split(r.URL().Path, "/")
segments := strings.Split(url.Path, "/")
groupIndex := 0
index := 0
if r.URL() != nil && r.c.base != nil && strings.Contains(r.URL().Path, r.c.base.Path) {
groupIndex += len(strings.Split(r.c.base.Path, "/"))
trimmedBasePath := ""
if url != nil && r.c.base != nil && strings.Contains(url.Path, r.c.base.Path) {
p := strings.TrimPrefix(url.Path, r.c.base.Path)
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
// store the base path that we have trimmed so we can append it
// before returning the URL
trimmedBasePath = r.c.base.Path
segments = strings.Split(p, "/")
groupIndex = 1
}
if groupIndex >= len(segments) {
if len(segments) <= 2 {
return *url
}
@ -563,7 +573,7 @@ func (r Request) finalURLTemplate() url.URL {
segments[index+3] = "{name}"
}
}
url.Path = path.Join(segments...)
url.Path = path.Join(trimmedBasePath, path.Join(segments...))
return *url
}

33
rest/request_test.go
View File

@ -338,6 +338,7 @@ func TestResultIntoWithNoBodyReturnsErr(t *testing.T) {
func TestURLTemplate(t *testing.T) {
uri, _ := url.Parse("http://localhost/some/base/url/path")
uriSingleSlash, _ := url.Parse("http://localhost/")
testCases := []struct {
Request *Request
ExpectedFullURL string
@ -485,6 +486,38 @@ func TestURLTemplate(t *testing.T) {
ExpectedFullURL: "http://localhost/some/base/url/path/pre1/namespaces/namespaces/namespaces/namespaces/namespaces/namespaces/finalize",
ExpectedFinalURL: "http://localhost/%7Bprefix%7D",
},
{
// dynamic client with core group + namespace + resourceResource (with name) where baseURL is a single /
// /api/$RESOURCEVERSION/namespaces/$NAMESPACE/$RESOURCE/%NAME
Request: NewRequestWithClient(uriSingleSlash, "", ClientContentConfig{GroupVersion: schema.GroupVersion{Group: "test"}}, nil).Verb("DELETE").
Prefix("/api/v1/namespaces/ns/r2/name1"),
ExpectedFullURL: "http://localhost/api/v1/namespaces/ns/r2/name1",
ExpectedFinalURL: "http://localhost/api/v1/namespaces/%7Bnamespace%7D/r2/%7Bname%7D",
},
{
// dynamic client with core group + namespace + resourceResource (with name) where baseURL is 'some/base/url/path'
// /api/$RESOURCEVERSION/namespaces/$NAMESPACE/$RESOURCE/%NAME
Request: NewRequestWithClient(uri, "", ClientContentConfig{GroupVersion: schema.GroupVersion{Group: "test"}}, nil).Verb("DELETE").
Prefix("/api/v1/namespaces/ns/r3/name1"),
ExpectedFullURL: "http://localhost/some/base/url/path/api/v1/namespaces/ns/r3/name1",
ExpectedFinalURL: "http://localhost/some/base/url/path/api/v1/namespaces/%7Bnamespace%7D/r3/%7Bname%7D",
},
{
// dynamic client where baseURL is a single /
// /
Request: NewRequestWithClient(uriSingleSlash, "", ClientContentConfig{GroupVersion: schema.GroupVersion{Group: "test"}}, nil).Verb("DELETE").
Prefix("/"),
ExpectedFullURL: "http://localhost/",
ExpectedFinalURL: "http://localhost/",
},
{
// dynamic client where baseURL is a single /
// /version
Request: NewRequestWithClient(uriSingleSlash, "", ClientContentConfig{GroupVersion: schema.GroupVersion{Group: "test"}}, nil).Verb("DELETE").
Prefix("/version"),
ExpectedFullURL: "http://localhost/version",
ExpectedFinalURL: "http://localhost/version",
},
}
for i, testCase := range testCases {
r := testCase.Request