From d9d3b88580f53a2816ce06fd2d39541a531807f2 Mon Sep 17 00:00:00 2001
From: Dmytro Kishchenko <d.kischenko@sweet.tv>
Date: Fri, 10 Nov 2023 14:00:00 +0100
Subject: [PATCH] Added availability to set 200/204 for OPTIONS response status
 code

---
 .gitignore |  2 ++
 config.go  | 36 +++++++++++++++++++++---------------
 cors.go    |  3 +++
 3 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/.gitignore b/.gitignore
index b4ecae3..002df84 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,5 @@ _testmain.go
 *.prof
 
 coverage.out
+
+.idea
diff --git a/config.go b/config.go
index 735c8c1..427cfc0 100644
--- a/config.go
+++ b/config.go
@@ -8,13 +8,14 @@ import (
 )
 
 type cors struct {
-	allowAllOrigins  bool
-	allowCredentials bool
-	allowOriginFunc  func(string) bool
-	allowOrigins     []string
-	normalHeaders    http.Header
-	preflightHeaders http.Header
-	wildcardOrigins  [][]string
+	allowAllOrigins           bool
+	allowCredentials          bool
+	allowOriginFunc           func(string) bool
+	allowOrigins              []string
+	normalHeaders             http.Header
+	preflightHeaders          http.Header
+	wildcardOrigins           [][]string
+	optionsResponseStatusCode int
 }
 
 var (
@@ -48,14 +49,19 @@ func newCors(config Config) *cors {
 		}
 	}
 
+	if config.OptionsResponseStatusCode == 0 {
+		config.OptionsResponseStatusCode = http.StatusNoContent
+	}
+
 	return &cors{
-		allowOriginFunc:  config.AllowOriginFunc,
-		allowAllOrigins:  config.AllowAllOrigins,
-		allowCredentials: config.AllowCredentials,
-		allowOrigins:     normalize(config.AllowOrigins),
-		normalHeaders:    generateNormalHeaders(config),
-		preflightHeaders: generatePreflightHeaders(config),
-		wildcardOrigins:  config.parseWildcardRules(),
+		allowOriginFunc:           config.AllowOriginFunc,
+		allowAllOrigins:           config.AllowAllOrigins,
+		allowCredentials:          config.AllowCredentials,
+		allowOrigins:              normalize(config.AllowOrigins),
+		normalHeaders:             generateNormalHeaders(config),
+		preflightHeaders:          generatePreflightHeaders(config),
+		wildcardOrigins:           config.parseWildcardRules(),
+		optionsResponseStatusCode: config.OptionsResponseStatusCode,
 	}
 }
 
@@ -80,7 +86,7 @@ func (cors *cors) applyCors(c *gin.Context) {
 
 	if c.Request.Method == "OPTIONS" {
 		cors.handlePreflight(c)
-		defer c.AbortWithStatus(http.StatusNoContent) // Using 204 is better than 200 when the request status is OPTIONS
+		defer c.AbortWithStatus(cors.optionsResponseStatusCode)
 	} else {
 		cors.handleNormal(c)
 	}
diff --git a/cors.go b/cors.go
index 4113437..f3ab41e 100644
--- a/cors.go
+++ b/cors.go
@@ -53,6 +53,9 @@ type Config struct {
 
 	// Allows usage of file:// schema (dangerous!) use it only when you 100% sure it's needed
 	AllowFiles bool
+
+	// Allows to pass custom OPTIONS response status code for old browsers / clients
+	OptionsResponseStatusCode int
 }
 
 // AddAllowMethods is allowed to add custom methods