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url.go
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/
url.go
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package validators
import (
"regexp"
"strings"
"github.com/authorizerdev/authorizer/server/constants"
"github.com/authorizerdev/authorizer/server/memorystore"
"github.com/authorizerdev/authorizer/server/parsers"
)
// IsValidOrigin validates origin based on ALLOWED_ORIGINS
func IsValidOrigin(url string) bool {
allowedOriginsString, err := memorystore.Provider.GetStringStoreEnvVariable(constants.EnvKeyAllowedOrigins)
allowedOrigins := []string{}
if err != nil {
allowedOrigins = []string{"*"}
} else {
allowedOrigins = strings.Split(allowedOriginsString, ",")
}
if len(allowedOrigins) == 1 && allowedOrigins[0] == "*" {
return true
}
hasValidURL := false
hostName, port := parsers.GetHostParts(url)
currentOrigin := hostName + ":" + port
for _, origin := range allowedOrigins {
replacedString := origin
// if has regex whitelisted domains
if strings.Contains(origin, "*") {
replacedString = strings.ReplaceAll(origin, ".", "\\.")
replacedString = strings.ReplaceAll(replacedString, "*", ".*")
if strings.HasPrefix(replacedString, ".*") {
replacedString += "\\b"
}
if strings.HasSuffix(replacedString, ".*") {
replacedString = "\\b" + replacedString
}
}
if matched, _ := regexp.MatchString(replacedString, currentOrigin); matched {
hasValidURL = true
break
}
}
return hasValidURL
}