utils

Documentation

Index

• Constants
• func CopyHeaders(dst, src http.Header)
• func CopyURL(i *url.URL) *url.URL
• func HasHeaders(names []string, headers http.Header) bool
• func NopWriteCloser(w io.Writer) io.WriteCloser
• func RemoveHeaders(headers http.Header, names ...string)
• type BasicAuth
  • func ParseAuthHeader(header string) (*BasicAuth, error)
  • func (ba *BasicAuth) String() string
• type BufferWriter
  • func NewBufferWriter(w io.WriteCloser) *BufferWriter
  • func (b *BufferWriter) Close() error
  • func (b *BufferWriter) Header() http.Header
  • func (b *BufferWriter) Write(buf []byte) (int, error)
  • func (b *BufferWriter) WriteHeader(code int)
• type ErrorHandler
• type ErrorHandlerFunc
  • func (f ErrorHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, err error)
• type ExtractSource
• type ExtractorFunc
  • func (f ExtractorFunc) Extract(req *http.Request) (string, int64, error)
• type FileLogger
  • func NewFileLogger(w io.Writer, lvl LogLevel) *FileLogger
  • func (f *FileLogger) Errorf(format string, args ...interface{})
  • func (f *FileLogger) Infof(format string, args ...interface{})
  • func (f *FileLogger) Warningf(format string, args ...interface{})
• type LogLevel
• type Logger
• type NOPLogger
  • func (*NOPLogger) Error(string)
  • func (*NOPLogger) Errorf(format string, args ...interface{})
  • func (*NOPLogger) Info(string)
  • func (*NOPLogger) Infof(format string, args ...interface{})
  • func (*NOPLogger) Warning(string)
  • func (*NOPLogger) Warningf(format string, args ...interface{})
• type ProxyWriter
  • func (p *ProxyWriter) Flush()
  • func (p *ProxyWriter) Header() http.Header
  • func (p *ProxyWriter) StatusCode() int
  • func (p *ProxyWriter) Write(buf []byte) (int, error)
  • func (p *ProxyWriter) WriteHeader(code int)
• type SourceExtractor
  • func NewExtractor(variable string) (SourceExtractor, error)
• type StdHandler
  • func (e *StdHandler) ServeHTTP(w http.ResponseWriter, req *http.Request, err error)

Constants

const (
	INFO = iota
	WARN
	ERROR
)

Functions

func CopyHeaders

func CopyHeaders(dst, src http.Header)

CopyHeaders copies http headers from source to destination, it does not overide, but adds multiple headers

func CopyURL

func CopyURL(i *url.URL) *url.URL

CopyURL provides update safe copy by avoiding shallow copying User field

func HasHeaders

func HasHeaders(names []string, headers http.Header) bool

HasHeaders determines whether any of the header names is present in the http headers

func NopWriteCloser

func NopWriteCloser(w io.Writer) io.WriteCloser

NopCloser returns a WriteCloser with a no-op Close method wrapping the provided Writer w.

func RemoveHeaders

func RemoveHeaders(headers http.Header, names ...string)

RemoveHeaders removes the header with the given names from the headers map

Types

type BasicAuth

type BasicAuth struct {
	Username string
	Password string
}

func ParseAuthHeader

func ParseAuthHeader(header string) (*BasicAuth, error)

func (*BasicAuth) String

func (ba *BasicAuth) String() string

type BufferWriter

type BufferWriter struct {
	H    http.Header
	Code int
	W    io.WriteCloser
}

func NewBufferWriter

func NewBufferWriter(w io.WriteCloser) *BufferWriter

func (*BufferWriter) Close

func (b *BufferWriter) Close() error

func (*BufferWriter) Header

func (b *BufferWriter) Header() http.Header

func (*BufferWriter) Write

func (b *BufferWriter) Write(buf []byte) (int, error)

func (*BufferWriter) WriteHeader

func (b *BufferWriter) WriteHeader(code int)

WriteHeader sets rw.Code.

type ErrorHandler

type ErrorHandler interface {
	ServeHTTP(w http.ResponseWriter, req *http.Request, err error)
}

var DefaultHandler ErrorHandler = &StdHandler{}

type ErrorHandlerFunc

type ErrorHandlerFunc func(http.ResponseWriter, *http.Request, error)

func (ErrorHandlerFunc) ServeHTTP

func (f ErrorHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, err error)

ServeHTTP calls f(w, r).

type ExtractSource

type ExtractSource func(req *http.Request)

type ExtractorFunc

type ExtractorFunc func(req *http.Request) (token string, amount int64, err error)

func (ExtractorFunc) Extract

func (f ExtractorFunc) Extract(req *http.Request) (string, int64, error)

type FileLogger

type FileLogger struct {
	// contains filtered or unexported fields
}

func NewFileLogger

func NewFileLogger(w io.Writer, lvl LogLevel) *FileLogger

func (*FileLogger) Errorf

func (f *FileLogger) Errorf(format string, args ...interface{})

func (*FileLogger) Infof

func (f *FileLogger) Infof(format string, args ...interface{})

func (*FileLogger) Warningf

func (f *FileLogger) Warningf(format string, args ...interface{})

type LogLevel

type LogLevel int

type Logger

type Logger interface {
	Infof(format string, args ...interface{})
	Warningf(format string, args ...interface{})
	Errorf(format string, args ...interface{})
}

Logger defines a simple logging interface

var NullLogger Logger = &NOPLogger{}

type NOPLogger

type NOPLogger struct {
}

func (*NOPLogger) Error

func (*NOPLogger) Error(string)

func (*NOPLogger) Errorf

func (*NOPLogger) Errorf(format string, args ...interface{})

func (*NOPLogger) Info

func (*NOPLogger) Info(string)

func (*NOPLogger) Infof

func (*NOPLogger) Infof(format string, args ...interface{})

func (*NOPLogger) Warning

func (*NOPLogger) Warning(string)

func (*NOPLogger) Warningf

func (*NOPLogger) Warningf(format string, args ...interface{})

type ProxyWriter

type ProxyWriter struct {
	W    http.ResponseWriter
	Code int
}

ProxyWriter helps to capture response headers and status code from the ServeHTTP. It can be safely passed to ServeHTTP handler, wrapping the real response writer.

func (*ProxyWriter) Flush

func (p *ProxyWriter) Flush()

func (*ProxyWriter) Header

func (p *ProxyWriter) Header() http.Header

func (*ProxyWriter) StatusCode

func (p *ProxyWriter) StatusCode() int

func (*ProxyWriter) Write

func (p *ProxyWriter) Write(buf []byte) (int, error)

func (*ProxyWriter) WriteHeader

func (p *ProxyWriter) WriteHeader(code int)

type SourceExtractor

type SourceExtractor interface {
	Extract(req *http.Request) (token string, amount int64, err error)
}

ExtractSource extracts the source from the request, e.g. that may be client ip, or particular header that identifies the source. amount stands for amount of connections the source consumes, usually 1 for connection limiters error should be returned when source can not be identified

func NewExtractor

func NewExtractor(variable string) (SourceExtractor, error)

type StdHandler

type StdHandler struct {
}

func (*StdHandler) ServeHTTP

func (e *StdHandler) ServeHTTP(w http.ResponseWriter, req *http.Request, err error)