fix mockArchiveServer and refactor isRemoteHTTPArchive

Signed-off-by: Suleiman Dibirov <idsulik@gmail.com>

pkg/plugin/installer/http_installer_test.go

@@ -25,6 +25,7 @@ import (
 	"net/http/httptest"
 	"os"
 	"path/filepath"
+	"sort"
 	"strings"
 	"syscall"
 	"testing"
@@ -67,8 +68,18 @@ func TestStripName(t *testing.T) {
 }
 
 func mockArchiveServer(extensionToContentType map[string]string) *httptest.Server {
+	// Extract and sort keys by length in descending order
+	extensions := make([]string, 0, len(extensionToContentType))
+	for ext := range extensionToContentType {
+		extensions = append(extensions, ext)
+	}
+	sort.Slice(extensions, func(i, j int) bool {
+		return len(extensions[i]) > len(extensions[j])
+	})
+
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		for ext, contentType := range extensionToContentType {
+		for _, ext := range extensions {
+			contentType := extensionToContentType[ext]
 			if strings.HasSuffix(r.URL.Path, ext) {
 				w.Header().Add("Content-Type", contentType)
 				fmt.Fprintln(w, "test")

pkg/plugin/installer/installer.go

@@ -94,37 +94,51 @@ func isLocalReference(source string) bool {
 // It works by checking whether the source looks like a URL and, if it does, running a
 // HEAD operation to see if the remote resource is a file that we understand.
 func isRemoteHTTPArchive(source string) bool {
-	if strings.HasPrefix(source, "http://") || strings.HasPrefix(source, "https://") {
+	if !isHTTPURL(source) {
-		res, err := http.Head(source)
+		return false
-		if err != nil {
+	}
-			// If we get an error at the network layer, we can't install it. So
-			// we return false.
-			return false
-		}
-
-		// Next, we look for the content type or content disposition headers to see
-		// if they have matching extractors.
-		contentType := res.Header.Get("content-type")
-		var foundSuffix string
 
-		if contentType == "application/octet-stream" {
+	contentType, err := getRemoteContentType(source)
-			foundSuffix = filepath.Ext(source)
+	if err != nil {
-		} else {
+		return false
-			foundSuffix, _ = mediaTypeToExtension(contentType)
+	}
-		}
 
-		if foundSuffix == "" {
+	// Handle octet-stream specially by checking file extension
-			// Media type not recognized
+	if contentType == "application/octet-stream" {
-			return false
+		for suffix := range Extractors {
+			if strings.HasSuffix(source, suffix) {
+				return true
+			}
 		}
 
-		_, ok := Extractors[foundSuffix]
+		return false
+	}
 
-		return ok
+	// Check if we have an extractor for this media type
+	if suffix, ok := mediaTypeToExtension(contentType); ok {
+		_, hasExtractor := Extractors[suffix]
+		return hasExtractor
 	}
+
 	return false
 }
 
+// isHTTPURL checks if the source is an HTTP or HTTPS URL
+func isHTTPURL(source string) bool {
+	return strings.HasPrefix(source, "http://") || strings.HasPrefix(source, "https://")
+}
+
+// getRemoteContentType performs a HEAD request and returns the content-type
+func getRemoteContentType(url string) (string, error) {
+	res, err := http.Head(url)
+	if err != nil {
+		return "", err
+	}
+	defer res.Body.Close()
+
+	return res.Header.Get("content-type"), nil
+}
+
 // isPlugin checks if the directory contains a plugin.yaml file.
 func isPlugin(dirname string) bool {
 	_, err := os.Stat(filepath.Join(dirname, plugin.PluginFileName))