chore: reorganize useAgent form field

pkg/modules/chromium/chromium.go

@@ -61,10 +61,6 @@ type Chromium struct {
 
 // Options are the available options for converting HTML document to PDF.
 type Options struct {
-	// UserAgent overrides the default User-Agent header.
-	// Optional.
-	UserAgent string
-
 	// WaitDelay is the duration to wait when loading an HTML document before
 	// converting it to PDF.
 	// Optional.
@@ -75,6 +71,10 @@ type Options struct {
 	// Optional.
 	WaitWindowStatus string
 
+	// UserAgent overrides the default User-Agent header.
+	// Optional.
+	UserAgent string
+
 	// ExtraHTTPHeaders are the HTTP headers to send by Chromium while loading
 	// the HTML document.
 	// Optional.
@@ -147,9 +147,9 @@ type Options struct {
 // DefaultOptions returns the default values for Options.
 func DefaultOptions() Options {
 	return Options{
-		UserAgent:         "",
 		WaitDelay:         0,
 		WaitWindowStatus:  "",
+		UserAgent:         "",
 		ExtraHTTPHeaders:  nil,
 		Landscape:         false,
 		PrintBackground:   false,

pkg/modules/chromium/routes.go

@@ -26,9 +26,9 @@ func FormDataChromiumPDFOptions(ctx *api.Context) (*api.FormData, Options) {
 	defaultOptions := DefaultOptions()
 
 	var (
-		userAgent                                        string
 		waitDelay                                        time.Duration
 		waitWindowStatus                                 string
+		userAgent                                        string
 		extraHTTPHeaders                                 map[string]string
 		landscape, printBackground                       bool
 		scale, paperWidth, paperHeight                   float64
@@ -39,9 +39,9 @@ func FormDataChromiumPDFOptions(ctx *api.Context) (*api.FormData, Options) {
 	)
 
 	form := ctx.FormData().
-		String("userAgent", &userAgent, defaultOptions.UserAgent).
 		Duration("waitDelay", &waitDelay, defaultOptions.WaitDelay).
 		String("waitWindowStatus", &waitWindowStatus, defaultOptions.WaitWindowStatus).
+		String("userAgent", &userAgent, defaultOptions.UserAgent).
 		Custom("extraHttpHeaders", func(value string) error {
 			if value == "" {
 				extraHTTPHeaders = defaultOptions.ExtraHTTPHeaders
@@ -71,9 +71,9 @@ func FormDataChromiumPDFOptions(ctx *api.Context) (*api.FormData, Options) {
 		Bool("preferCssPageSize", &preferCSSPageSize, defaultOptions.PreferCSSPageSize)
 
 	options := Options{
-		UserAgent:         userAgent,
 		WaitDelay:         waitDelay,
 		WaitWindowStatus:  waitWindowStatus,
+		UserAgent:         userAgent,
 		ExtraHTTPHeaders:  extraHTTPHeaders,
 		Landscape:         landscape,
 		PrintBackground:   printBackground,