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package helmet
import (
"fmt"
"gitee.com/azhai/fiber-u8l/v2"
)
// New creates a new middleware handler
func New(config ...Config) fiber.Handler {
// Init config
cfg := configDefault(config...)
// Return middleware handler
return func(c *fiber.Ctx) error {
// Next request to skip middleware
if cfg.Next != nil && cfg.Next(c) {
return c.Next()
}
// Set headers
if cfg.XSSProtection != "" {
c.Set(fiber.HeaderXXSSProtection, cfg.XSSProtection)
}
if cfg.ContentTypeNosniff != "" {
c.Set(fiber.HeaderXContentTypeOptions, cfg.ContentTypeNosniff)
}
if cfg.XFrameOptions != "" {
c.Set(fiber.HeaderXFrameOptions, cfg.XFrameOptions)
}
if cfg.CrossOriginEmbedderPolicy != "" {
c.Set("Cross-Origin-Embedder-Policy", cfg.CrossOriginEmbedderPolicy)
}
if cfg.CrossOriginOpenerPolicy != "" {
c.Set("Cross-Origin-Opener-Policy", cfg.CrossOriginOpenerPolicy)
}
if cfg.CrossOriginResourcePolicy != "" {
c.Set("Cross-Origin-Resource-Policy", cfg.CrossOriginResourcePolicy)
}
if cfg.OriginAgentCluster != "" {
c.Set("Origin-Agent-Cluster", cfg.OriginAgentCluster)
}
if cfg.ReferrerPolicy != "" {
c.Set("Referrer-Policy", cfg.ReferrerPolicy)
}
if cfg.XDNSPrefetchControl != "" {
c.Set("X-DNS-Prefetch-Control", cfg.XDNSPrefetchControl)
}
if cfg.XDownloadOptions != "" {
c.Set("X-Download-Options", cfg.XDownloadOptions)
}
if cfg.XPermittedCrossDomain != "" {
c.Set("X-Permitted-Cross-Domain-Policies", cfg.XPermittedCrossDomain)
}
// Handle HSTS headers
if c.Protocol() == "https" && cfg.HSTSMaxAge != 0 {
subdomains := ""
if !cfg.HSTSExcludeSubdomains {
subdomains = "; includeSubDomains"
}
if cfg.HSTSPreloadEnabled {
subdomains = fmt.Sprintf("%s; preload", subdomains)
}
c.Set(fiber.HeaderStrictTransportSecurity, fmt.Sprintf("max-age=%d%s", cfg.HSTSMaxAge, subdomains))
}
// Handle Content-Security-Policy headers
if cfg.ContentSecurityPolicy != "" {
if cfg.CSPReportOnly {
c.Set(fiber.HeaderContentSecurityPolicyReportOnly, cfg.ContentSecurityPolicy)
} else {
c.Set(fiber.HeaderContentSecurityPolicy, cfg.ContentSecurityPolicy)
}
}
// Handle Permissions-Policy headers
if cfg.PermissionPolicy != "" {
c.Set(fiber.HeaderPermissionsPolicy, cfg.PermissionPolicy)
}
return c.Next()
}
}
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