Merge pull request #25064 from Clarifai/httpheaders-querystring

Automatic merge from submit-queue

Preserve query strings in HTTP probes instead of escaping them

Fixes a problem reported on Slack by devth.

```release-note
* Allow the use of query strings and URI fragments in HTTP probes
```

This might also preserve fragments, for those crazy enough to pass them.

I am using url.Parse() on the path in order to get path/query/fragment
and also deliberately avoiding the addition of more fields to the API.

pkg/kubelet/prober/prober.go

@@ -208,11 +208,16 @@ func findPortByName(container api.Container, portName string) (int, error) {
 
 // formatURL formats a URL from args.  For testability.
 func formatURL(scheme string, host string, port int, path string) *url.URL {
-	return &url.URL{
-		Scheme: scheme,
-		Host:   net.JoinHostPort(host, strconv.Itoa(port)),
-		Path:   path,
+	u, err := url.Parse(path)
+	// Something is busted with the path, but it's too late to reject it. Pass it along as is.
+	if err != nil {
+		u = &url.URL{
+			Path: path,
+		}
 	}
+	u.Scheme = scheme
+	u.Host = net.JoinHostPort(host, strconv.Itoa(port))
+	return u
 }
 
 type execInContainer struct {

pkg/kubelet/prober/prober_test.go

@@ -41,6 +41,8 @@ func TestFormatURL(t *testing.T) {
 	}{
 		{"http", "localhost", 93, "", "http://localhost:93"},
 		{"https", "localhost", 93, "/path", "https://localhost:93/path"},
+		{"http", "localhost", 93, "?foo", "http://localhost:93?foo"},
+		{"https", "localhost", 93, "/path?bar", "https://localhost:93/path?bar"},
 	}
 	for _, test := range testCases {
 		url := formatURL(test.scheme, test.host, test.port, test.path)