engine

type Config struct {
	Address      string        // TCP address to listen on.
	Listener     net.Listener  // Custom `net.Listener`. If set, server accepts connections on it.
	TLSCertFile  string        // TLS certificate file path.
	TLSKeyFile   string        // TLS key file path.
	DisableHTTP2 bool          // Disables HTTP/2.
	ReadTimeout  time.Duration // Maximum duration before timing out read of the request.
	WriteTimeout time.Duration // Maximum duration before timing out write of the response.
}

type Cookie interface {
	// Name returns the name of the cookie.
	Name() string

	// Value returns the value of the cookie.
	Value() string

	// Path returns the path of the cookie.
	Path() string

	// Domain returns the domain of the cookie.
	Domain() string

	// Expires returns the expiry time of the cookie.
	Expires() time.Time

	// Secure indicates if cookie is secured.
	Secure() bool

	// HTTPOnly indicate if cookies is HTTP only.
	HTTPOnly() bool
}

type Handler interface {
	ServeHTTP(Request, Response)
}

type HandlerFunc func(Request, Response)

type Header interface {
	// Add adds the key, value pair to the header. It appends to any existing values
	// associated with key.
	Add(string, string)

	// Del deletes the values associated with key.
	Del(string)

	// Set sets the header entries associated with key to the single element value.
	// It replaces any existing values associated with key.
	Set(string, string)

	// Get gets the first value associated with the given key. If there are
	// no values associated with the key, Get returns "".
	Get(string) string

	// Keys returns the header keys.
	Keys() []string

	// Contains checks if the header is set.
	Contains(string) bool
}

type Request interface {
	// IsTLS returns true if HTTP connection is TLS otherwise false.
	IsTLS() bool

	// Scheme returns the HTTP protocol scheme, `http` or `https`.
	Scheme() string

	// Host returns HTTP request host. Per RFC 2616, this is either the value of
	// the `Host` header or the host name given in the URL itself.
	Host() string

	// SetHost sets the host of the request.
	SetHost(string)

	// URI returns the unmodified `Request-URI` sent by the client.
	URI() string

	// SetURI sets the URI of the request.
	SetURI(string)

	// URL returns `engine.URL`.
	URL() URL

	// Header returns `engine.Header`.
	Header() Header

	// Referer returns the referring URL, if sent in the request.
	Referer() string

	// ContentLength returns the size of request's body.
	ContentLength() int64

	// UserAgent returns the client's `User-Agent`.
	UserAgent() string

	// RemoteAddress returns the client's network address.
	RemoteAddress() string

	// RealIP returns the client's network address based on `X-Forwarded-For`
	// or `X-Real-IP` request header.
	RealIP() string

	// Method returns the request's HTTP function.
	Method() string

	// SetMethod sets the HTTP method of the request.
	SetMethod(string)

	// Body returns request's body.
	Body() io.Reader

	// Body sets request's body.
	SetBody(io.Reader)

	// FormValue returns the form field value for the provided name.
	FormValue(string) string

	// FormParams returns the form parameters.
	FormParams() map[string][]string

	// FormFile returns the multipart form file for the provided name.
	FormFile(string) (*multipart.FileHeader, error)

	// MultipartForm returns the multipart form.
	MultipartForm() (*multipart.Form, error)

	// Cookie returns the named cookie provided in the request.
	Cookie(string) (Cookie, error)

	// Cookies returns the HTTP cookies sent with the request.
	Cookies() []Cookie
}

type Response interface {
	// Header returns `engine.Header`
	Header() Header

	// WriteHeader sends an HTTP response header with status code.
	WriteHeader(int)

	// Write writes the data to the connection as part of an HTTP reply.
	Write(b []byte) (int, error)

	// SetCookie adds a `Set-Cookie` header in HTTP response.
	SetCookie(Cookie)

	// Status returns the HTTP response status.
	Status() int

	// Size returns the number of bytes written to HTTP response.
	Size() int64

	// Committed returns true if HTTP response header is written, otherwise false.
	Committed() bool

	// Write returns the HTTP response writer.
	Writer() io.Writer

	// SetWriter sets the HTTP response writer.
	SetWriter(io.Writer)
}

type Server interface {
	// SetHandler sets the handler for the HTTP server.
	SetHandler(Handler)

	// SetLogger sets the logger for the HTTP server.
	SetLogger(log.Logger)

	// Start starts the HTTP server.
	Start() error

	// Stop stops the HTTP server by closing underlying TCP connection.
	Stop() error
}

type URL interface {
	// Path returns the request URL path.
	Path() string

	// SetPath sets the request URL path.
	SetPath(string)

	// QueryParam returns the query param for the provided name.
	QueryParam(string) string

	// QueryParam returns the query parameters as map.
	QueryParams() map[string][]string

	// QueryString returns the URL query string.
	QueryString() string
}