🧹 Allow to override the API endpoint

README.md

@@ -90,6 +90,14 @@ make test
 For any requests, bug or comments, please [open an issue][issues] or [submit a
 pull request][pulls].
 
+## Development
+
+When developing new APIs locally, you can overwrite the API endpoint.
+Specify `MONDOO_API_ENDPOINT` environment variable for the `generate` command, e.g.,:
+```
+MONDOO_API_ENDPOINT=http://127.0.0.1 make generate
+```
+
 ## Kudos
 
 This implementation is heavily inspired by the [GitHub GraphQL Go Client](https://github.com/shurcooL/githubv4).

gen/gen.go

@@ -13,6 +13,7 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
 	"path/filepath"
 	"sort"
@@ -74,7 +75,6 @@ func generateSchema(token string, basePath string) error {
 
 // loadSchema loads the GraphQL schema from the Mondoo API.
 func loadSchema(token string) (schema interface{}, err error) {
-	apiHost := "us.api.mondoo.com"
 	introspection := `
 {
   __schema {
@@ -176,10 +176,12 @@ fragment TypeRef on __Type {
   }
 }
 `
+	apiEndpoint, apiHost := getAPIEndpoint()
+	fmt.Printf("using endpoint %s\n", apiEndpoint)
 	// do introspection query
 	req, err := http.NewRequest(
 		"POST",
-		"https://"+apiHost+"/query",
+		apiEndpoint,
 		strings.NewReader(`{"query":`+strconv.Quote(introspection)+`}`),
 	)
 	if err != nil {
@@ -338,3 +340,27 @@ func parseTemplate(text string) *template.Template {
 		},
 	}).Parse(text))
 }
+
+func getAPIEndpoint() (string, string) {
+	apiHost := "us.api.mondoo.com"
+	apiEndpoint, err := url.JoinPath("https://", apiHost, "/query")
+	if err != nil {
+		log.Fatalf("invalid MONDOO_API_ENDPOINT: %v", err)
+	}
+	endpoint, ok := os.LookupEnv("MONDOO_API_ENDPOINT")
+	if ok {
+		if !strings.HasPrefix(endpoint, "http://") && !strings.HasPrefix(endpoint, "https://") {
+			endpoint = "https://" + endpoint
+		}
+		apiEndpoint, err = url.JoinPath(endpoint, "/query")
+		if err != nil {
+			log.Fatalf("invalid MONDOO_API_ENDPOINT: %v", err)
+		}
+	}
+	parsedUrl, err := url.Parse(apiEndpoint)
+	if err != nil {
+		log.Fatalf("invalid API url: %v", err)
+	}
+
+	return apiEndpoint, parsedUrl.Host
+}

gen/gen_test.go

@@ -18,3 +18,26 @@ func TestRun(t *testing.T) {
 	err := generateSchema(token, "..")
 	require.NoError(t, err)
 }
+func TestGetAPIEndpoint(t *testing.T) {
+	// Test case 1: MONDOO_API_ENDPOINT not set
+	expectedEndpoint := "https://us.api.mondoo.com/query"
+	expectedHost := "us.api.mondoo.com"
+	actualEndpoint, actualHost := getAPIEndpoint()
+	require.Equal(t, expectedEndpoint, actualEndpoint, "Unexpected API endpoint")
+	require.Equal(t, expectedHost, actualHost, "Unexpected host")
+
+	// Test case 2: MONDOO_API_ENDPOINT set
+	os.Setenv("MONDOO_API_ENDPOINT", "custom.api.endpoint")
+	expectedEndpoint = "https://custom.api.endpoint/query"
+	expectedHost = "custom.api.endpoint"
+	actualEndpoint, actualHost = getAPIEndpoint()
+	require.Equal(t, expectedEndpoint, actualEndpoint, "Unexpected API endpoint")
+	require.Equal(t, expectedHost, actualHost, "Unexpected host")
+
+	os.Setenv("MONDOO_API_ENDPOINT", "http://custom.api.endpoint:1234")
+	expectedEndpoint = "http://custom.api.endpoint:1234/query"
+	expectedHost = "custom.api.endpoint:1234"
+	actualEndpoint, actualHost = getAPIEndpoint()
+	require.Equal(t, expectedEndpoint, actualEndpoint, "Unexpected API endpoint")
+	require.Equal(t, expectedHost, actualHost, "Unexpected host")
+}