cors

Documentation

Index

• type Cors
  • func AllowAll() Cors
  • func Default() Cors
  • func New(options Options) Cors
• type Options

Types

type Cors

type Cors interface {
	AllowedMethods() []string
	AllowedHeaders() []string
	AllowedOriginsAll() bool

	IsMethodAllowed(method string) bool
	Handler(h http.Handler) http.Handler
	HandlePreflight(w http.ResponseWriter, r *http.Request)
	HandleActualRequest(w http.ResponseWriter, r *http.Request)
}

Cors interface

func AllowAll

func AllowAll() Cors

AllowAll create a new Cors handler with permissive configuration allowing all origins with all standard methods with any header and credentials.

func Default

func Default() Cors

Default creates a new Cors handler with default options.

func New

func New(options Options) Cors

New creates a new Cors handler with the provided options.

type Options

type Options struct {
	// AllowedOrigins is a list of origins a cross-domain request can be executed from.
	// If the special "*" value is present in the list, all origins will be allowed.
	// An origin may contain a wildcard (*) to replace 0 or more characters
	// (i.e.: http://*.domain.com). Usage of wildcards implies a small performance penalty.
	// Only one wildcard can be used per origin.
	// Default value is ["*"]
	AllowedOrigins []string
	// AllowOriginFunc is a custom function to validate the origin. It take the origin
	// as argument and returns true if allowed or false otherwise. If this option is
	// set, the content of AllowedOrigins is ignored.
	AllowOriginFunc func(origin string) bool
	// AllowOriginFunc is a custom function to validate the origin. It takes the HTTP Request object and the origin as
	// argument and returns true if allowed or false otherwise. If this option is set, the content of `AllowedOrigins`
	// and `AllowOriginFunc` is ignored.
	AllowOriginRequestFunc func(r *http.Request, origin string) bool
	// AllowedMethods is a list of methods the client is allowed to use with
	// cross-domain requests. Default value is simple methods (HEAD, GET and POST).
	AllowedMethods []string
	// AllowedHeaders is list of non simple headers the client is allowed to use with
	// cross-domain requests.
	// If the special "*" value is present in the list, all headers will be allowed.
	// Default value is [] but "Origin" is always appended to the list.
	AllowedHeaders []string
	// ExposedHeaders indicates which headers are safe to expose to the API of a CORS
	// API specification
	ExposedHeaders []string
	// MaxAge indicates how long (in seconds) the results of a preflight request
	// can be cached
	MaxAge int
	// AllowCredentials indicates whether the request can include user credentials like
	// cookies, HTTP authentication or client side SSL certificates.
	AllowCredentials bool
	// OptionsPassthrough instructs preflight to let other potential next handlers to
	// process the OPTIONS method. Turn this on if your application handles OPTIONS.
	OptionsPassthrough bool
	// Debugging flag adds additional output to debug server side CORS issues
	Debug bool
	// Logger Debug Mode Logger, if nil use std log
	Logger *zerolog.Logger
}

Options is a configuration container to setup the CORS middleware.