middleware

type BasicAuthConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Validator is a function to validate BasicAuth credentials.
	// Required.
	Validator BasicAuthValidator

	// Realm is a string to define realm attribute of BasicAuth.
	// Default value "Restricted".
	Realm string
}

type BasicAuthValidator func(string, string, echo.Context) (bool, error)

type BeforeFunc func(echo.Context)

type BodyDumpConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Handler receives request and response payload.
	// Required.
	Handler BodyDumpHandler
}

type BodyDumpHandler func(echo.Context, []byte, []byte)

type BodyLimitConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Maximum allowed size for a request body, it can be specified
	// as `4x` or `4xB`, where x is one of the multiple from K, M, G, T or P.
	Limit string `yaml:"limit"`
	// contains filtered or unexported fields
}

type CORSConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// AllowOrigin defines a list of origins that may access the resource.
	// Optional. Default value []string{"*"}.
	AllowOrigins []string `yaml:"allow_origins"`

	// AllowMethods defines a list methods allowed when accessing the resource.
	// This is used in response to a preflight request.
	// Optional. Default value DefaultCORSConfig.AllowMethods.
	AllowMethods []string `yaml:"allow_methods"`

	// AllowHeaders defines a list of request headers that can be used when
	// making the actual request. This is in response to a preflight request.
	// Optional. Default value []string{}.
	AllowHeaders []string `yaml:"allow_headers"`

	// AllowCredentials indicates whether or not the response to the request
	// can be exposed when the credentials flag is true. When used as part of
	// a response to a preflight request, this indicates whether or not the
	// actual request can be made using credentials.
	// Optional. Default value false.
	AllowCredentials bool `yaml:"allow_credentials"`

	// ExposeHeaders defines a whitelist headers that clients are allowed to
	// access.
	// Optional. Default value []string{}.
	ExposeHeaders []string `yaml:"expose_headers"`

	// MaxAge indicates how long (in seconds) the results of a preflight request
	// can be cached.
	// Optional. Default value 0.
	MaxAge int `yaml:"max_age"`
}

type CSRFConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// TokenLength is the length of the generated token.
	TokenLength uint8 `yaml:"token_length"`

	// TokenLookup is a string in the form of "<source>:<key>" that is used
	// to extract token from the request.
	// Optional. Default value "header:X-CSRF-Token".
	// Possible values:
	// - "header:<name>"
	// - "form:<name>"
	// - "query:<name>"
	TokenLookup string `yaml:"token_lookup"`

	// Context key to store generated CSRF token into context.
	// Optional. Default value "csrf".
	ContextKey string `yaml:"context_key"`

	// Name of the CSRF cookie. This cookie will store CSRF token.
	// Optional. Default value "csrf".
	CookieName string `yaml:"cookie_name"`

	// Domain of the CSRF cookie.
	// Optional. Default value none.
	CookieDomain string `yaml:"cookie_domain"`

	// Path of the CSRF cookie.
	// Optional. Default value none.
	CookiePath string `yaml:"cookie_path"`

	// Max age (in seconds) of the CSRF cookie.
	// Optional. Default value 86400 (24hr).
	CookieMaxAge int `yaml:"cookie_max_age"`

	// Indicates if CSRF cookie is secure.
	// Optional. Default value false.
	CookieSecure bool `yaml:"cookie_secure"`

	// Indicates if CSRF cookie is HTTP only.
	// Optional. Default value false.
	CookieHTTPOnly bool `yaml:"cookie_http_only"`
}

type GzipConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Gzip compression level.
	// Optional. Default value -1.
	Level int `yaml:"level"`
}

type JWTConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// BeforeFunc defines a function which is executed just before the middleware.
	BeforeFunc BeforeFunc

	// SuccessHandler defines a function which is executed for a valid token.
	SuccessHandler JWTSuccessHandler

	// ErrorHandler defines a function which is executed for an invalid token.
	// It may be used to define a custom JWT error.
	ErrorHandler JWTErrorHandler

	// Signing key to validate token.
	// Required.
	SigningKey interface{}

	// Signing method, used to check token signing method.
	// Optional. Default value HS256.
	SigningMethod string

	// Context key to store user information from the token into context.
	// Optional. Default value "user".
	ContextKey string

	// Claims are extendable claims data defining token content.
	// Optional. Default value jwt.MapClaims
	Claims jwt.Claims

	// TokenLookup is a string in the form of "<source>:<name>" that is used
	// to extract token from the request.
	// Optional. Default value "header:Authorization".
	// Possible values:
	// - "header:<name>"
	// - "query:<name>"
	// - "cookie:<name>"
	TokenLookup string

	// AuthScheme to be used in the Authorization header.
	// Optional. Default value "Bearer".
	AuthScheme string
	// contains filtered or unexported fields
}

type JWTErrorHandler func(error) error

type JWTSuccessHandler func(echo.Context)

type KeyAuthConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// KeyLookup is a string in the form of "<source>:<name>" that is used
	// to extract key from the request.
	// Optional. Default value "header:Authorization".
	// Possible values:
	// - "header:<name>"
	// - "query:<name>"
	// - "form:<name>"
	KeyLookup string `yaml:"key_lookup"`

	// AuthScheme to be used in the Authorization header.
	// Optional. Default value "Bearer".
	AuthScheme string

	// Validator is a function to validate key.
	// Required.
	Validator KeyAuthValidator
}

type KeyAuthValidator func(string, echo.Context) (bool, error)

type LoggerConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Tags to constructed the logger format.
	//
	// - time_unix
	// - time_unix_nano
	// - time_rfc3339
	// - time_rfc3339_nano
	// - time_custom
	// - id (Request ID)
	// - remote_ip
	// - uri
	// - host
	// - method
	// - path
	// - protocol
	// - referer
	// - user_agent
	// - status
	// - error
	// - latency (In nanoseconds)
	// - latency_human (Human readable)
	// - bytes_in (Bytes received)
	// - bytes_out (Bytes sent)
	// - header:<NAME>
	// - query:<NAME>
	// - form:<NAME>
	//
	// Example "${remote_ip} ${status}"
	//
	// Optional. Default value DefaultLoggerConfig.Format.
	Format string `yaml:"format"`

	// Optional. Default value DefaultLoggerConfig.CustomTimeFormat.
	CustomTimeFormat string `yaml:"custom_time_format"`

	// Output is a writer where logs in JSON format are written.
	// Optional. Default value os.Stdout.
	Output io.Writer
	// contains filtered or unexported fields
}

type MethodOverrideConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Getter is a function that gets overridden method from the request.
	// Optional. Default values MethodFromHeader(echo.HeaderXHTTPMethodOverride).
	Getter MethodOverrideGetter
}

type MethodOverrideGetter func(echo.Context) string

type ProxyBalancer interface {
	AddTarget(*ProxyTarget) bool
	RemoveTarget(string) bool
	Next(echo.Context) *ProxyTarget
}

type ProxyConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Balancer defines a load balancing technique.
	// Required.
	Balancer ProxyBalancer

	// Rewrite defines URL path rewrite rules. The values captured in asterisk can be
	// retrieved by index e.g. $1, $2 and so on.
	// Examples:
	// "/old":              "/new",
	// "/api/*":            "/$1",
	// "/js/*":             "/public/javascripts/$1",
	// "/users/*/orders/*": "/user/$1/order/$2",
	Rewrite map[string]string

	// Context key to store selected ProxyTarget into context.
	// Optional. Default value "target".
	ContextKey string

	// To customize the transport to remote.
	// Examples: If custom TLS certificates are required.
	Transport http.RoundTripper
	// contains filtered or unexported fields
}

type ProxyTarget struct {
	Name string
	URL  *url.URL
	Meta echo.Map
}

type RecoverConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Size of the stack to be printed.
	// Optional. Default value 4KB.
	StackSize int `yaml:"stack_size"`

	// DisableStackAll disables formatting stack traces of all other goroutines
	// into buffer after the trace for the current goroutine.
	// Optional. Default value false.
	DisableStackAll bool `yaml:"disable_stack_all"`

	// DisablePrintStack disables printing stack trace.
	// Optional. Default value as false.
	DisablePrintStack bool `yaml:"disable_print_stack"`
}

type RedirectConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper

	// Status code to be used when redirecting the request.
	// Optional. Default value http.StatusMovedPermanently.
	Code int `yaml:"code"`
}

type RequestIDConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Generator defines a function to generate an ID.
	// Optional. Default value random.String(32).
	Generator func() string
}

type RewriteConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Rules defines the URL path rewrite rules. The values captured in asterisk can be
	// retrieved by index e.g. $1, $2 and so on.
	// Example:
	// "/old":              "/new",
	// "/api/*":            "/$1",
	// "/js/*":             "/public/javascripts/$1",
	// "/users/*/orders/*": "/user/$1/order/$2",
	// Required.
	Rules map[string]string `yaml:"rules"`
	// contains filtered or unexported fields
}

type SecureConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// XSSProtection provides protection against cross-site scripting attack (XSS)
	// by setting the `X-XSS-Protection` header.
	// Optional. Default value "1; mode=block".
	XSSProtection string `yaml:"xss_protection"`

	// ContentTypeNosniff provides protection against overriding Content-Type
	// header by setting the `X-Content-Type-Options` header.
	// Optional. Default value "nosniff".
	ContentTypeNosniff string `yaml:"content_type_nosniff"`

	// XFrameOptions can be used to indicate whether or not a browser should
	// be allowed to render a page in a <frame>, <iframe> or <object> .
	// Sites can use this to avoid clickjacking attacks, by ensuring that their
	// content is not embedded into other sites.provides protection against
	// clickjacking.
	// Optional. Default value "SAMEORIGIN".
	// Possible values:
	// - "SAMEORIGIN" - The page can only be displayed in a frame on the same origin as the page itself.
	// - "DENY" - The page cannot be displayed in a frame, regardless of the site attempting to do so.
	// - "ALLOW-FROM uri" - The page can only be displayed in a frame on the specified origin.
	XFrameOptions string `yaml:"x_frame_options"`

	// HSTSMaxAge sets the `Strict-Transport-Security` header to indicate how
	// long (in seconds) browsers should remember that this site is only to
	// be accessed using HTTPS. This reduces your exposure to some SSL-stripping
	// man-in-the-middle (MITM) attacks.
	// Optional. Default value 0.
	HSTSMaxAge int `yaml:"hsts_max_age"`

	// HSTSExcludeSubdomains won't include subdomains tag in the `Strict Transport Security`
	// header, excluding all subdomains from security policy. It has no effect
	// unless HSTSMaxAge is set to a non-zero value.
	// Optional. Default value false.
	HSTSExcludeSubdomains bool `yaml:"hsts_exclude_subdomains"`

	// ContentSecurityPolicy sets the `Content-Security-Policy` header providing
	// security against cross-site scripting (XSS), clickjacking and other code
	// injection attacks resulting from execution of malicious content in the
	// trusted web page context.
	// Optional. Default value "".
	ContentSecurityPolicy string `yaml:"content_security_policy"`
}

type Skipper func(echo.Context) bool

type StaticConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Root directory from where the static content is served.
	// Required.
	Root string `yaml:"root"`

	// Index file for serving a directory.
	// Optional. Default value "index.html".
	Index string `yaml:"index"`

	// Enable HTML5 mode by forwarding all not-found requests to root so that
	// SPA (single-page application) can handle the routing.
	// Optional. Default value false.
	HTML5 bool `yaml:"html5"`

	// Enable directory browsing.
	// Optional. Default value false.
	Browse bool `yaml:"browse"`
}

type TrailingSlashConfig struct {
	// Skipper defines a function to skip middleware.
	Skipper Skipper

	// Status code to be used when redirecting the request.
	// Optional, but when provided the request is redirected using this code.
	RedirectCode int `yaml:"redirect_code"`
}