Add redis support for distributed caching (#83)

* Add redis support for distributed caching

* Move towards the self-provided Redis connection pool and RESP protocol implementation.
Official redis client library won't work with yaegi.

* fixup! Move towards the self-provided Redis connection pool and RESP protocol implementation. Official redis client library won't work with yaegi.

* fixup! fixup! Move towards the self-provided Redis connection pool and RESP protocol implementation. Official redis client library won't work with yaegi.

* fixup! fixup! fixup! Move towards the self-provided Redis connection pool and RESP protocol implementation. Official redis client library won't work with yaegi.

* fixup! fixup! fixup! fixup! Move towards the self-provided Redis connection pool and RESP protocol implementation. Official redis client library won't work with yaegi.

* fixup! fixup! fixup! fixup! fixup! Move towards the self-provided Redis connection pool and RESP protocol implementation. Official redis client library won't work with yaegi.

* ... and another all nighter.

* fixup! ... and another all nighter.

* fixup! fixup! ... and another all nighter.

* fixup! fixup! fixup! ... and another all nighter.

* Resolve issue #85 by adding ability to set custom claims in JWT tokens

* Remove redundant validation in auth middleware ( issue #89 )

* Add ability to set cookie prefix for session cookies ( #87 )

* fixup! Add ability to set cookie prefix for session cookies ( #87 )

* Add ability to set cookie max age - issue #91

* Potential fix for code scanning alert no. 10: Size computation for allocation may overflow

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

* fixup! Merge main into 0.8.0-redis: resolve conflicts

---------

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

config_marshalling.go

@@ -0,0 +1,116 @@
+package traefikoidc
+
+import (
+	"encoding/json"
+)
+
+// REDACTED is the placeholder value for sensitive information
+const REDACTED = "[REDACTED]"
+
+// MarshalJSON implements custom JSON marshalling to redact sensitive fields
+// Rewritten without type aliases for yaegi compatibility
+func (c Config) MarshalJSON() ([]byte, error) {
+	// Build a map manually to avoid type alias issues with yaegi
+	result := make(map[string]interface{})
+
+	// Copy public fields
+	result["providerURL"] = c.ProviderURL
+	result["clientID"] = c.ClientID
+	result["callbackURL"] = c.CallbackURL
+	result["logoutURL"] = c.LogoutURL
+	result["postLogoutRedirectURI"] = c.PostLogoutRedirectURI
+	result["scopes"] = c.Scopes
+	result["forceHTTPS"] = c.ForceHTTPS
+	result["logLevel"] = c.LogLevel
+	result["rateLimit"] = c.RateLimit
+	result["excludedURLs"] = c.ExcludedURLs
+	result["allowedUserDomains"] = c.AllowedUserDomains
+	result["allowedUsers"] = c.AllowedUsers
+	result["allowedRolesAndGroups"] = c.AllowedRolesAndGroups
+
+	// Redact sensitive fields
+	result["clientSecret"] = REDACTED
+	result["sessionEncryptionKey"] = REDACTED
+
+	// Handle Redis config
+	if c.Redis != nil {
+		redisMap := make(map[string]interface{})
+		redisMap["enabled"] = c.Redis.Enabled
+		redisMap["address"] = c.Redis.Address
+		redisMap["password"] = REDACTED
+		redisMap["db"] = c.Redis.DB
+		redisMap["poolSize"] = c.Redis.PoolSize
+		redisMap["cacheMode"] = c.Redis.CacheMode
+		result["redis"] = redisMap
+	}
+
+	return json.Marshal(result)
+}
+
+// MarshalYAML implements custom YAML marshalling to redact sensitive fields
+// Rewritten without type aliases for yaegi compatibility
+func (c Config) MarshalYAML() (interface{}, error) {
+	// Build a map manually to avoid type alias issues with yaegi
+	result := make(map[string]interface{})
+
+	// Copy public fields
+	result["providerURL"] = c.ProviderURL
+	result["clientID"] = c.ClientID
+	result["callbackURL"] = c.CallbackURL
+	result["logoutURL"] = c.LogoutURL
+	result["postLogoutRedirectURI"] = c.PostLogoutRedirectURI
+	result["scopes"] = c.Scopes
+	result["forceHTTPS"] = c.ForceHTTPS
+	result["logLevel"] = c.LogLevel
+	result["rateLimit"] = c.RateLimit
+	result["excludedURLs"] = c.ExcludedURLs
+	result["allowedUserDomains"] = c.AllowedUserDomains
+	result["allowedUsers"] = c.AllowedUsers
+	result["allowedRolesAndGroups"] = c.AllowedRolesAndGroups
+
+	// Redact sensitive fields
+	result["clientSecret"] = REDACTED
+	result["sessionEncryptionKey"] = REDACTED
+
+	// Handle Redis config
+	if c.Redis != nil {
+		redisMap := make(map[string]interface{})
+		redisMap["enabled"] = c.Redis.Enabled
+		redisMap["address"] = c.Redis.Address
+		redisMap["password"] = REDACTED
+		redisMap["db"] = c.Redis.DB
+		redisMap["poolSize"] = c.Redis.PoolSize
+		redisMap["cacheMode"] = c.Redis.CacheMode
+		result["redis"] = redisMap
+	}
+
+	return result, nil
+}
+
+// MarshalJSON for RedisConfig to redact sensitive fields
+// Rewritten without type aliases for yaegi compatibility
+func (r RedisConfig) MarshalJSON() ([]byte, error) {
+	result := make(map[string]interface{})
+	result["enabled"] = r.Enabled
+	result["address"] = r.Address
+	result["password"] = REDACTED
+	result["db"] = r.DB
+	result["poolSize"] = r.PoolSize
+	result["cacheMode"] = r.CacheMode
+
+	return json.Marshal(result)
+}
+
+// MarshalYAML for RedisConfig to redact sensitive fields
+// Rewritten without type aliases for yaegi compatibility
+func (r RedisConfig) MarshalYAML() (interface{}, error) {
+	result := make(map[string]interface{})
+	result["enabled"] = r.Enabled
+	result["address"] = r.Address
+	result["password"] = REDACTED
+	result["db"] = r.DB
+	result["poolSize"] = r.PoolSize
+	result["cacheMode"] = r.CacheMode
+
+	return result, nil
+}