[v2] CSS mimetype fix

v2/internal/frontend/assetserver/mimecache.go

@@ -2,6 +2,8 @@ package assetserver
 
 import (
 	"net/http"
+	"path/filepath"
+	"strings"
 	"sync"
 )
 import "github.com/gabriel-vasile/mimetype"
@@ -27,6 +29,10 @@ func GetMimetype(filename string, data []byte) string {
 		result = detect.String()
 	}
 
+	if filepath.Ext(filename) == ".css" && strings.HasPrefix(result, "text/plain") {
+		result = strings.Replace(result, "text/plain", "text/css", 1)
+	}
+
 	if result == "" {
 		result = "application/octet-stream"
 	}

v2/internal/frontend/assetserver/mimecache_test.go

@@ -0,0 +1,25 @@
+package assetserver
+
+import "testing"
+
+func TestGetMimetype(t *testing.T) {
+	type args struct {
+		filename string
+		data     []byte
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		// TODO: Add test cases.
+		{"css", args{"test.css", []byte("body{margin:0;padding:0;background-color:#d579b2}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50;background-color:#ededed}#nav{padding:30px}#nav a{font-weight:700;color:#2c\n3e50}#nav a.router-link-exact-active{color:#42b983}.hello[data-v-4e26ad49]{margin:10px 0}")}, "text/css; charset=utf-8"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := GetMimetype(tt.args.filename, tt.args.data); got != tt.want {
+				t.Errorf("GetMimetype() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}