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Signed-off-by: Philip Laine <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // SPDX-FileCopyrightText: 2021-Present The Zarf Authors | ||
|
|
||
| // Package dns contains DNS related functionality. | ||
| package dns | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net/url" | ||
| "regexp" | ||
| "strconv" | ||
| ) | ||
|
|
||
| var ( | ||
| // localClusterServiceRegex is used to match the local cluster service format: | ||
| localClusterServiceRegex = regexp.MustCompile(`^(?P<name>[^\.]+)\.(?P<namespace>[^\.]+)\.svc\.cluster\.local$`) | ||
| ) | ||
|
|
||
| // IsServiceURL returns true if the give url complies with the service url format. | ||
| func IsServiceURL(serviceURL string) bool { | ||
| _, _, _, err := ParseServiceURL(serviceURL) | ||
| return err == nil | ||
| } | ||
|
|
||
| // ParseServiceURL takes a serviceURL and parses it to find the service info for connecting to the cluster. The string is expected to follow the following format: | ||
| // Example serviceURL: http://{SERVICE_NAME}.{NAMESPACE}.svc.cluster.local:{PORT}. | ||
| func ParseServiceURL(serviceURL string) (string, string, int, error) { | ||
| if serviceURL == "" { | ||
| return "", "", 0, errors.New("service url cannot be empty") | ||
| } | ||
| parsedURL, err := url.Parse(serviceURL) | ||
| if err != nil { | ||
| return "", "", 0, err | ||
| } | ||
| if parsedURL.Port() == "" { | ||
| return "", "", 0, errors.New("service url does not have a port") | ||
| } | ||
| remotePort, err := strconv.Atoi(parsedURL.Port()) | ||
| if err != nil { | ||
| return "", "", 0, err | ||
| } | ||
| matches := localClusterServiceRegex.FindStringSubmatch(parsedURL.Hostname()) | ||
| if len(matches) != 3 { | ||
| return "", "", 0, fmt.Errorf("invalid service url %s", serviceURL) | ||
| } | ||
| return matches[2], matches[1], remotePort, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // SPDX-FileCopyrightText: 2021-Present The Zarf Authors | ||
|
|
||
| package dns | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestServiceURL(t *testing.T) { | ||
| t.Parallel() | ||
|
|
||
| tests := []struct { | ||
| name string | ||
| serviceURL string | ||
| expectedErr string | ||
| expectedNamespace string | ||
| expectedName string | ||
| expectedPort int | ||
| }{ | ||
| { | ||
| name: "correct service url", | ||
| serviceURL: "http://foo.bar.svc.cluster.local:5000", | ||
| expectedNamespace: "bar", | ||
| expectedName: "foo", | ||
| expectedPort: 5000, | ||
| }, | ||
| { | ||
| name: "invalid service url without port", | ||
| serviceURL: "http://google.com", | ||
| expectedErr: "service url does not have a port", | ||
| }, | ||
| { | ||
| name: "invalid service url with port", | ||
| serviceURL: "http://google.com:3000", | ||
| expectedErr: "invalid service url http://google.com:3000", | ||
| }, | ||
| { | ||
| name: "empty service url", | ||
| serviceURL: "", | ||
| expectedErr: "service url cannot be empty", | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| t.Parallel() | ||
|
|
||
| isServiceURL := IsServiceURL(tt.serviceURL) | ||
| namespace, name, port, err := ParseServiceURL(tt.serviceURL) | ||
| if tt.expectedErr != "" { | ||
| require.False(t, isServiceURL) | ||
| require.EqualError(t, err, tt.expectedErr) | ||
| return | ||
| } | ||
| require.True(t, isServiceURL) | ||
| require.Equal(t, tt.expectedNamespace, namespace) | ||
| require.Equal(t, tt.expectedName, name) | ||
| require.Equal(t, tt.expectedPort, port) | ||
| }) | ||
| } | ||
| } |
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