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REST Client metrics capture grows unbounded

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The URLs were unique by namespace and query parameter value, which means
an infinite number of metrics counters could be created.
This commit is contained in:
Clayton Coleman 2015-06-10 12:52:28 -04:00
parent 629237bbb7
commit bdbf477207
2 changed files with 35 additions and 4 deletions
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21
pkg/client/request.go
View File

@ -530,12 +530,25 @@ func (r *Request) URL() *url.URL {
return finalURL
}
// finalURLTemplate is similar to URL(), but if the request contains name of an object
// (e.g. GET for a specific Pod) it will be substited with "<name>".
func (r *Request) finalURLTemplate() string {
// finalURLTemplate is similar to URL(), but will make all specific parameter values equal
// - instead of name or namespace, "{name}" and "{namespace}" will be used, and all query
// parameters will be reset. This creates a copy of the request so as not to change the
// underyling object. This means some useful request info (like the types of field
// selectors in use) will be lost.
// TODO: preserve field selector keys
func (r Request) finalURLTemplate() string {
if len(r.resourceName) != 0 {
r.resourceName = "<name>"
r.resourceName = "{name}"
}
if r.namespaceSet && len(r.namespace) != 0 {
r.namespace = "{namespace}"
}
newParams := url.Values{}
v := []string{"{value}"}
for k := range r.params {
newParams[k] = v
}
r.params = newParams
return r.URL().String()
}

18
pkg/client/request_test.go
View File

@ -215,6 +215,24 @@ func TestResultIntoWithErrReturnsErr(t *testing.T) {
}
}
func TestURLTemplate(t *testing.T) {
uri, _ := url.Parse("http://localhost")
r := NewRequest(nil, "POST", uri, "test", nil, false, false)
r.Prefix("pre1").Resource("r1").Namespace("ns").Name("nm").Param("p0", "v0")
full := r.URL()
if full.String() != "http://localhost/pre1/namespaces/ns/r1/nm?p0=v0" {
t.Errorf("unexpected initial URL: %s", full)
}
actual := r.finalURLTemplate()
expected := "http://localhost/pre1/namespaces/%7Bnamespace%7D/r1/%7Bname%7D?p0=%7Bvalue%7D"
if actual != expected {
t.Errorf("unexpected URL template: %s %s", actual, expected)
}
if r.URL().String() != full.String() {
t.Errorf("creating URL template changed request: %s -> %s", full.String(), r.URL().String())
}
}
func TestTransformResponse(t *testing.T) {
invalid := []byte("aaaaa")
uri, _ := url.Parse("http://localhost")