Fix CORS module structure and tests

Author: DakshithaS

cors/v1/README.md

@@ -0,0 +1,11 @@
+# CORS v1
+
+This module provides basic CORS header functionality for HTTP responses.
+
+## Usage
+
+```go
+import "github.com/DakshithaS/go-multi-major-modules/cors/v1"
+
+cors.AddCORSHeaders(w)
+```

cors/v1/cors_test.go

@@ -0,0 +1,23 @@
+package cors_test
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	cors "github.com/DakshithaS/go-multi-major-modules/cors/v1/src"
+)
+
+func TestAddCORSHeaders(t *testing.T) {
+	w := httptest.NewRecorder()
+	cors.AddCORSHeaders(w)
+
+	if w.Header().Get("Access-Control-Allow-Origin") != "*" {
+		t.Errorf("Expected Access-Control-Allow-Origin to be '*', got %s", w.Header().Get("Access-Control-Allow-Origin"))
+	}
+	if w.Header().Get("Access-Control-Allow-Methods") != "GET, POST, PUT, DELETE, OPTIONS" {
+		t.Errorf("Expected Access-Control-Allow-Methods to be 'GET, POST, PUT, DELETE, OPTIONS', got %s", w.Header().Get("Access-Control-Allow-Methods"))
+	}
+	if w.Header().Get("Access-Control-Allow-Headers") != "Content-Type, Authorization" {
+		t.Errorf("Expected Access-Control-Allow-Headers to be 'Content-Type, Authorization', got %s", w.Header().Get("Access-Control-Allow-Headers"))
+	}
+}

cors/v1/go.mod

@@ -0,0 +1,3 @@
+module github.com/DakshithaS/go-multi-major-modules/cors/v1
+
+go 1.21

cors/v1/src/cors.go

@@ -0,0 +1,10 @@
+package cors
+
+import "net/http"
+
+// AddCORSHeaders adds basic CORS headers to the response
+func AddCORSHeaders(w http.ResponseWriter) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+	w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+}

cors/v2/README.md

@@ -0,0 +1,17 @@
+# CORS v2
+
+This module provides configurable CORS header functionality for HTTP responses.
+
+## Usage
+
+```go
+import "github.com/DakshithaS/go-multi-major-modules/cors/v2"
+
+options := cors.CORSOptions{
+	AllowedOrigins: []string{"http://example.com"},
+	AllowedMethods: []string{"GET", "POST"},
+	AllowedHeaders: []string{"Content-Type"},
+}
+
+cors.AddCORSHeadersWithOptions(w, options)
+```

cors/v2/cors_test.go

@@ -0,0 +1,32 @@
+package cors_test
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	cors "github.com/DakshithaS/go-multi-major-modules/cors/v2/src"
+)
+
+func TestAddCORSHeadersWithOptions(t *testing.T) {
+	w := httptest.NewRecorder()
+	options := cors.CORSOptions{
+		AllowedOrigins:   []string{"http://example.com"},
+		AllowedMethods:   []string{"GET", "POST"},
+		AllowedHeaders:   []string{"Content-Type"},
+		AllowCredentials: true,
+	}
+	cors.AddCORSHeadersWithOptions(w, options)
+
+	if w.Header().Get("Access-Control-Allow-Origin") != "http://example.com" {
+		t.Errorf("Expected Access-Control-Allow-Origin to be 'http://example.com', got %s", w.Header().Get("Access-Control-Allow-Origin"))
+	}
+	if w.Header().Get("Access-Control-Allow-Methods") != "GET, POST" {
+		t.Errorf("Expected Access-Control-Allow-Methods to be 'GET, POST', got %s", w.Header().Get("Access-Control-Allow-Methods"))
+	}
+	if w.Header().Get("Access-Control-Allow-Headers") != "Content-Type" {
+		t.Errorf("Expected Access-Control-Allow-Headers to be 'Content-Type', got %s", w.Header().Get("Access-Control-Allow-Headers"))
+	}
+	if w.Header().Get("Access-Control-Allow-Credentials") != "true" {
+		t.Errorf("Expected Access-Control-Allow-Credentials to be 'true', got %s", w.Header().Get("Access-Control-Allow-Credentials"))
+	}
+}

cors/v2/go.mod

@@ -0,0 +1,3 @@
+module github.com/DakshithaS/go-multi-major-modules/cors/v2
+
+go 1.21

cors/v2/src/cors.go

@@ -0,0 +1,50 @@
+package cors
+
+import "net/http"
+
+// CORSOptions holds configuration for CORS headers
+type CORSOptions struct {
+	AllowedOrigins   []string
+	AllowedMethods   []string
+	AllowedHeaders   []string
+	AllowCredentials bool
+}
+
+// AddCORSHeadersWithOptions adds CORS headers based on provided options
+func AddCORSHeadersWithOptions(w http.ResponseWriter, options CORSOptions) {
+	if len(options.AllowedOrigins) > 0 {
+		w.Header().Set("Access-Control-Allow-Origin", options.AllowedOrigins[0]) // Simplified: just first one
+	} else {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+	}
+
+	if len(options.AllowedMethods) > 0 {
+		methods := ""
+		for i, method := range options.AllowedMethods {
+			if i > 0 {
+				methods += ", "
+			}
+			methods += method
+		}
+		w.Header().Set("Access-Control-Allow-Methods", methods)
+	} else {
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+	}
+
+	if len(options.AllowedHeaders) > 0 {
+		headers := ""
+		for i, header := range options.AllowedHeaders {
+			if i > 0 {
+				headers += ", "
+			}
+			headers += header
+		}
+		w.Header().Set("Access-Control-Allow-Headers", headers)
+	} else {
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+	}
+
+	if options.AllowCredentials {
+		w.Header().Set("Access-Control-Allow-Credentials", "true")
+	}
+}

cors/v3/README.md

@@ -0,0 +1,12 @@
+# CORS v3
+
+This module provides an interface-based CORS handler for HTTP responses.
+
+## Usage
+
+```go
+import "github.com/DakshithaS/go-multi-major-modules/cors/v3"
+
+handler := cors.NewDefaultCORSHandler()
+handler.HandleCORS(w, r)
+```

cors/v3/cors_test.go

@@ -0,0 +1,26 @@
+package cors_test
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	cors "github.com/DakshithaS/go-multi-major-modules/cors/v3/src"
+)
+
+func TestDefaultCORSHandler_HandleCORS(t *testing.T) {
+	handler := cors.NewDefaultCORSHandler()
+	w := httptest.NewRecorder()
+	r := httptest.NewRequest("GET", "/", nil)
+
+	handler.HandleCORS(w, r)
+
+	if w.Header().Get("Access-Control-Allow-Origin") != "*" {
+		t.Errorf("Expected Access-Control-Allow-Origin to be '*', got %s", w.Header().Get("Access-Control-Allow-Origin"))
+	}
+	if w.Header().Get("Access-Control-Allow-Methods") != "GET, POST, PUT, DELETE, OPTIONS" {
+		t.Errorf("Expected Access-Control-Allow-Methods to be 'GET, POST, PUT, DELETE, OPTIONS', got %s", w.Header().Get("Access-Control-Allow-Methods"))
+	}
+	if w.Header().Get("Access-Control-Allow-Headers") != "Content-Type, Authorization" {
+		t.Errorf("Expected Access-Control-Allow-Headers to be 'Content-Type, Authorization', got %s", w.Header().Get("Access-Control-Allow-Headers"))
+	}
+}