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.
	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 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 header keys.
	Keys() []string
}

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

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

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

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

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

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

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

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)

	// 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
}

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

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