http

type CacheControlPublicHandler ¶

type CacheControlPublicHandler struct {
	http.Handler
}

CacheControlPublicHandler is a net/http.Handler implementation that sets the "Cache-Control" header to "public". It only sets the header if the status code is StatusOK/204 or StatusNotModified/304.

func (h *CacheControlPublicHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request)

type Error ¶

type Error struct {
	Code int
	Text string
}

Error is a HTTP error.

func NewErrorDefaultText(code int) *Error

func (err *Error) Error() string

type ExpiresHandler ¶

type ExpiresHandler struct {
	http.Handler
	Expires time.Duration
}

ExpiresHandler is a HTTP Handler that sets "Expires" header. It only sets the header if the status code is StatusOK/204 or StatusNotModified/304.

func (eh *ExpiresHandler) ServeHTTP(rw http.ResponseWriter, req *http.Request)

type Handler ¶

type Handler struct {
	Parser    Parser                                 // parse request to Params
	Server    imageserver.Server                     // handle image requests
	ETagFunc  func(params imageserver.Params) string // optional
	ErrorFunc func(err error, req *http.Request)     // allows to handle internal errors, optional
}

Handler is a HTTP Handler for imageserver.Server.

Only GET and HEAD methods are supported.

Supports ETag/If-None-Match (status code 304). It doesn't check if the image really exists.

func (handler *Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request)

type ListParser ¶

type ListParser []Parser

ListParser is a list of HTTP Parser.

func (lp ListParser) Parse(req *http.Request, params imageserver.Params) error

func (lp ListParser) Resolve(param string) string

type Parser ¶

type Parser interface {
	// Parse parses a Request and fill Params.
	Parse(*http.Request, imageserver.Params) error

	// Resolve resolves a param to a HTTP param.
	// It returns the resolved HTTP param, or an empty string.
	Resolve(param string) (httpParam string)
}

Parser represents a HTTP Request parser.

type SourceParser ¶

type SourceParser struct{}

SourceParser is a HTTP Parser that takes the "source" param from the query.

func (parser *SourceParser) Parse(req *http.Request, params imageserver.Params) error

func (parser *SourceParser) Resolve(param string) string

type SourcePathParser ¶

type SourcePathParser struct{}

SourcePathParser is a HTTP Parser that takes the "source" param from the path.

func (parser *SourcePathParser) Parse(req *http.Request, params imageserver.Params) error

func (parser *SourcePathParser) Resolve(param string) string

type SourcePrefixParser ¶

type SourcePrefixParser struct {
	Parser
	Prefix string
}

SourcePrefixParser is a HTTP Parser that adds a prefix to the "source" param.

func (ps *SourcePrefixParser) Parse(req *http.Request, params imageserver.Params) error

type SourceTransformParser ¶

type SourceTransformParser struct {
	Parser
	Transform func(source string) string
}

SourceTransformParser is a HTTP Parser that transforms the "source" param.

func (ps *SourceTransformParser) Parse(req *http.Request, params imageserver.Params) error