imgserver

README

imgserver

Test task for Yandex internship. Simple Go server that download all <img> tag images from HTML page, and return page with all images encoded base64. URL of HTTP page passes by query attribute. Support many different page encodings

usage

go get github.com/Skipor/imgserver/cmd/imgserver

$GOBIN/imgserver -p 8888

curl http://localhost:8888/?url=https://habrahabr.ru/interesting/

Documentation

Overview

Test task for Yandex internship. Simple Go server that download all <img> tag images from HTML page, and return page with all images encoded base64. URL of HTTP page passes by query attribute. Support many different page encodings

Index

• Constants
• type ContextAdaptor
  • func NewImgCtxAdaptor(log Logger, client *http.Client, timeout time.Duration) ContextAdaptor
  • func (h ContextAdaptor) ServeHTTP(w http.ResponseWriter, req *http.Request)
• type ErrorHandler
• type ErrorLogger
  • func (h ErrorLogger) HandleError(ctx context.Context, req *http.Request, err error) *Response
• type Handler
• type HandlerError
  • func NewHandlerError(statusCode int, description string) *HandlerError
  • func (e *HandlerError) Error() string
• type ImgHandler
  • func (h *ImgHandler) ServeHTTPC(ctx context.Context, w http.ResponseWriter, req *http.Request)
• type ImgLogicHandler
  • func NewImgLogicHandler(client *http.Client) *ImgLogicHandler
  • func (h *ImgLogicHandler) HandleLogic(ctx context.Context, req *http.Request) (*Response, error)
• type Logger
  • func SetEmitter(log Logger, emitter string) Logger
• type LogicHandler
• type Response
  • func NewInternalErrorResponse() *Response
  • func NewResponse() *Response
  • func NewTimeoutResponse() *Response

Constants

const (
	CtxHTTPClientKey = "httpclient"
	CtxLoggerKey     = "logger"
)

public keys upper handler can

const (
	//logger field to indicate log msg emitter
	FromLoggerFieldKey = "from"
)

Types

type ContextAdaptor

type ContextAdaptor struct {
	Handler
	Ctx context.Context
}

Implement http.Handler interface for imgserver.Handler

func NewImgCtxAdaptor

func NewImgCtxAdaptor(log Logger, client *http.Client, timeout time.Duration) ContextAdaptor

func (ContextAdaptor) ServeHTTP

func (h ContextAdaptor) ServeHTTP(w http.ResponseWriter, req *http.Request)

type ErrorHandler

type ErrorHandler interface {
	HandleError(ctx context.Context, req *http.Request, err error) *Response
}

type ErrorLogger

type ErrorLogger struct {
}

func (ErrorLogger) HandleError

func (h ErrorLogger) HandleError(ctx context.Context, req *http.Request, err error) *Response

type Handler

type Handler interface {
	ServeHTTPC(context.Context, http.ResponseWriter, *http.Request)
}

type HandlerError

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

func NewHandlerError

func NewHandlerError(statusCode int, description string) *HandlerError

func (*HandlerError) Error

func (e *HandlerError) Error() string

type ImgHandler

type ImgHandler struct {
	Log          Logger
	LogicHandler LogicHandler
	ErrorHandler ErrorHandler
	Timeout      time.Duration //no timeout if 0
	// contains filtered or unexported fields
}

func (*ImgHandler) ServeHTTPC

func (h *ImgHandler) ServeHTTPC(ctx context.Context, w http.ResponseWriter, req *http.Request)

type ImgLogicHandler

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

func NewImgLogicHandler

func NewImgLogicHandler(client *http.Client) *ImgLogicHandler

func (*ImgLogicHandler) HandleLogic

func (h *ImgLogicHandler) HandleLogic(ctx context.Context, req *http.Request) (*Response, error)

type Logger

type Logger interface {
	logrus.FieldLogger
}

func SetEmitter

func SetEmitter(log Logger, emitter string) Logger

type LogicHandler

type LogicHandler interface {
	HandleLogic(ctx context.Context, req *http.Request) (*Response, error)
}

type Response

type Response struct {
	StatusCode int
	Header     http.Header
	Body       *bytes.Buffer
}

func NewInternalErrorResponse

func NewInternalErrorResponse() *Response

func NewResponse

func NewResponse() *Response

func NewTimeoutResponse

func NewTimeoutResponse() *Response