nbhttp

package
v1.5.8 Latest Latest
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 Go to latest Published: Apr 23, 2024 License: MIT Imports: 27 Imported by: 57

Documentation

Index

Constants

View Source 
const (
	// IOModNonBlocking represents that the server serve all the connections by nbio poller goroutines to handle io events.
	IOModNonBlocking = 0
	// IOModBlocking represents that the server serve each connection with one goroutine at least to handle reading.
	IOModBlocking = 1
	// IOModMixed represents that the server creates listener mux to handle different connections, 1 listener will be dispatch to two ChanListener:
	// If ChanListener A's online is less than its max online num, the new connection will be dispatch to this listener A and served by single goroutine;
	// Else the new connection will be dispatch to ChanListener B and served by nbio poller.
	IOModMixed = 2

	// DefaultIOMod represents the default IO Mod used by nbhttp.Engine.
	DefaultIOMod = IOModNonBlocking
	// DefaultMaxBlockingOnline represents the default num of connections that will be dispatched to ChanListner A.
	DefaultMaxBlockingOnline = 10000
)
View Source 
const (
	// DefaultMaxLoad .
	DefaultMaxLoad = 1024 * 1024

	// DefaultHTTPReadLimit .
	DefaultHTTPReadLimit = 1024 * 1024 * 64

	// DefaultMaxWebsocketFramePayloadSize .
	DefaultMaxWebsocketFramePayloadSize = 1024 * 32

	// DefaultKeepaliveTime .
	DefaultKeepaliveTime = time.Second * 120

	// DefaultBlockingReadBufferSize sets to 4k.
	DefaultBlockingReadBufferSize = 1024 * 4
)
View Source 
const (

	// MaxUint .
	MaxUint = ^uint(0)
	// MaxInt .
	MaxInt = int64(int(MaxUint >> 1))
)

Variables

View Source 
var (
	// ErrInvalidCRLF .
	ErrInvalidCRLF = errors.New("invalid cr/lf at the end of line")

	// ErrInvalidHTTPVersion .
	ErrInvalidHTTPVersion = errors.New("invalid HTTP version")

	// ErrInvalidHTTPStatusCode .
	ErrInvalidHTTPStatusCode = errors.New("invalid HTTP status code")
	// ErrInvalidHTTPStatus .
	ErrInvalidHTTPStatus = errors.New("invalid HTTP status")

	// ErrInvalidMethod .
	ErrInvalidMethod = errors.New("invalid HTTP method")

	// ErrInvalidRequestURI .
	ErrInvalidRequestURI = errors.New("invalid URL")

	// ErrInvalidHost .
	ErrInvalidHost = errors.New("invalid host")

	// ErrInvalidPort .
	ErrInvalidPort = errors.New("invalid port")

	// ErrInvalidPath .
	ErrInvalidPath = errors.New("invalid path")

	// ErrInvalidQueryString .
	ErrInvalidQueryString = errors.New("invalid query string")

	// ErrInvalidFragment .
	ErrInvalidFragment = errors.New("invalid fragment")

	// ErrCRExpected .
	ErrCRExpected = errors.New("CR character expected")

	// ErrLFExpected .
	ErrLFExpected = errors.New("LF character expected")

	// ErrInvalidCharInHeader .
	ErrInvalidCharInHeader = errors.New("invalid character in header")

	// ErrUnexpectedContentLength .
	ErrUnexpectedContentLength = errors.New("unexpected content-length header")

	// ErrInvalidContentLength .
	ErrInvalidContentLength = errors.New("invalid ContentLength")

	// ErrInvalidChunkSize .
	ErrInvalidChunkSize = errors.New("invalid chunk size")

	// ErrTrailerExpected .
	ErrTrailerExpected = errors.New("trailer expected")

	// ErrTooLong .
	ErrTooLong = errors.New("invalid http message: too long")
)
View Source 
var (
	// ErrInvalidH2SM .
	ErrInvalidH2SM = errors.New("invalid http2 SM characters")

	// ErrInvalidH2HeaderR .
	ErrInvalidH2HeaderR = errors.New("invalid http2 SM characters")
)
View Source 
var (
	// ErrClientUnsupportedSchema .
	ErrClientUnsupportedSchema = errors.New("unsupported schema")

	// ErrClientTimeout .
	ErrClientTimeout = errors.New("timeout")

	// ErrClientClosed .
	ErrClientClosed = errors.New("http client closed")
)
View Source 
var (
	// ErrNilConn .
	ErrNilConn = errors.New("nil Conn")
)
View Source 
var (
	// ErrServiceOverload .
	ErrServiceOverload = errors.New("service overload")
)
View Source 
var ReadBufferPools = &sync.Map{}

Functions

func SyncExecutor added in v1.3.16 

func SyncExecutor(f func()) bool

Types

type BodyReader 

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

BodyReader implements io.ReadCloser and is to be used as HTTP body.

func NewBodyReader 

func NewBodyReader(engine *Engine) *BodyReader

NewBodyReader creates a BodyReader.

func (*BodyReader) Buffers added in v1.5.4 

func (br *BodyReader) Buffers() [][]byte

Buffers returns the underlayer buffers that store the HTTP Body.

func (*BodyReader) Close 

func (br *BodyReader) Close() error

Close frees buffers and resets itself to empty value.

func (*BodyReader) Engine added in v1.5.4 

func (br *BodyReader) Engine() *Engine

Engine returns Engine that creates this HTTP Body.

func (*BodyReader) Index added in v1.5.4 

func (br *BodyReader) Index() int

Index returns current head buffer's reading index.

func (*BodyReader) Left added in v1.5.4 

func (br *BodyReader) Left() int

Left returns how many bytes are left for reading.

func (*BodyReader) RawBodyBuffers added in v1.5.4 

func (br *BodyReader) RawBodyBuffers() [][]byte

RawBodyBuffers returns a reference of BodyReader's current buffers. The buffers returned will be closed(released automatically when closed) HTTP Handler is called, users should not free the buffers and should not hold it any longer after the HTTP Handler is called.

func (*BodyReader) Read 

func (br *BodyReader) Read(p []byte) (int, error)

Read reads body bytes to p, returns the num of bytes read and error.

type Client added in v1.2.4 

type Client struct {
	Engine *Engine

	Jar http.CookieJar

	Timeout time.Duration

	MaxConnsPerHost int32
	IdleConnTimeout time.Duration

	TLSClientConfig *tls.Config

	Dial func(network, addr string) (net.Conn, error)

	Proxy func(*http.Request) (*url.URL, error)

	CheckRedirect func(req *http.Request, via []*http.Request) error
	// contains filtered or unexported fields
}

Client implements the similar functions with std http.Client.

func (*Client) Close added in v1.2.4 

func (c *Client) Close()

Close closes all underlayer connections with EOF.

func (*Client) CloseWithError added in v1.2.4 

func (c *Client) CloseWithError(err error)

CloseWithError closes all underlayer connections with error.

func (*Client) Do added in v1.2.4 

func (c *Client) Do(req *http.Request, handler func(res *http.Response, conn net.Conn, err error))

Do sends an HTTP request and returns an HTTP response. Notice:

  1. It's blocking when Dial to the server;
  2. It's non-blocking for waiting for the response;
  3. It calls the handler when the response is received or other errors occur, such as timeout.

type ClientConn added in v1.2.4 

type ClientConn struct {
	Engine *Engine

	Jar http.CookieJar

	Timeout time.Duration

	IdleConnTimeout time.Duration

	TLSClientConfig *tls.Config

	Dial func(network, addr string) (net.Conn, error)

	Proxy func(*http.Request) (*url.URL, error)

	CheckRedirect func(req *http.Request, via []*http.Request) error
	// contains filtered or unexported fields
}

ClientConn .

func (*ClientConn) Close added in v1.2.4 

func (c *ClientConn) Close()

Close closes underlayer connection with EOF.

func (*ClientConn) CloseWithError added in v1.2.4 

func (c *ClientConn) CloseWithError(err error)

CloseWithError closes underlayer connection with error.

func (*ClientConn) Do added in v1.2.4 

func (c *ClientConn) Do(req *http.Request, handler func(res *http.Response, conn net.Conn, err error))

Do sends an HTTP request and returns an HTTP response. Notice:

  1. It's blocking when Dial to the server;
  2. It's non-blocking for waiting for the response;
  3. It calls the handler when the response is received or other errors occur, such as timeout.

func (*ClientConn) OnClose added in v1.2.4 

func (c *ClientConn) OnClose(h func())

OnClose registers a callback for closing.

func (*ClientConn) Reset added in v1.2.4 

func (c *ClientConn) Reset()

Reset resets itself as new created.

type ClientProcessor 

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

ClientProcessor is used for client side connection.

func (*ClientProcessor) Clean added in v1.4.0 

func (p *ClientProcessor) Clean(parser *Parser)

Clean .

func (*ClientProcessor) Close added in v1.1.4 

func (p *ClientProcessor) Close(parser *Parser, err error)

Close .

func (*ClientProcessor) OnBody 

func (p *ClientProcessor) OnBody(parser *Parser, data []byte) error

OnBody .

func (*ClientProcessor) OnComplete 

func (p *ClientProcessor) OnComplete(parser *Parser)

OnComplete .

func (*ClientProcessor) OnContentLength 

func (p *ClientProcessor) OnContentLength(parser *Parser, contentLength int)

OnContentLength .

func (*ClientProcessor) OnHeader 

func (p *ClientProcessor) OnHeader(parser *Parser, key, value string)

OnHeader .

func (*ClientProcessor) OnMethod 

func (p *ClientProcessor) OnMethod(parser *Parser, method string)

OnMethod .

func (*ClientProcessor) OnProto 

func (p *ClientProcessor) OnProto(parser *Parser, proto string) error

OnProto .

func (*ClientProcessor) OnStatus 

func (p *ClientProcessor) OnStatus(parser *Parser, code int, status string)

OnStatus .

func (*ClientProcessor) OnTrailerHeader 

func (p *ClientProcessor) OnTrailerHeader(parser *Parser, key, value string)

OnTrailerHeader .

func (*ClientProcessor) OnURL 

func (p *ClientProcessor) OnURL(parser *Parser, uri string) error

OnURL .

type ConfAddr added in v1.2.7 

type ConfAddr struct {
	Network   string
	Addr      string
	NListener int
	TLSConfig *tls.Config
	// contains filtered or unexported fields
}

ConfAddr .

type Config 

type Config struct {
	// Name describes your gopher name for logging, it's set to "NB" by default.
	Name string

	// Network is the global listening protocol, used with Addrs toghter.
	// tcp* supported only by now, there's no plan for other protocol such as udp,
	// because it's too easy to write udp server/client.
	Network string

	// TLSConfig is the global tls config for all tls addrs.
	TLSConfig *tls.Config

	// Addrs is the non-tls listening addr list for an Engine.
	// if it is empty, no listener created, then the Engine is used for client by default.
	Addrs []string

	// AddrsTLS is the tls listening addr list for an Engine.
	// Engine will create listeners by AddrsTLS if it's not empty.
	AddrsTLS []string

	// AddrConfigs is the non-tls listening addr details list for an Engine.
	AddrConfigs []ConfAddr

	// AddrConfigsTLS is the tls listening addr details list for an Engine.
	AddrConfigsTLS []ConfAddr

	// Listen is used to create listener for Engine.
	Listen func(network, addr string) (net.Listener, error)

	// ListenUDP is used to create udp listener for Engine.
	ListenUDP func(network string, laddr *net.UDPAddr) (*net.UDPConn, error)

	// MaxLoad represents the max online num, it's set to 10k by default.
	MaxLoad int

	// NListener represents listner goroutine num for each ConfAddr, it's set to 1 by default.
	NListener int

	// NPoller represents poller goroutine num, it's set to runtime.NumCPU() by default.
	NPoller int

	// ReadLimit represents the max size for parser reading, it's set to 64M by default.
	ReadLimit int

	// MaxHTTPBodySize represents the max size of HTTP body for parser reading.
	MaxHTTPBodySize int

	// ReadBufferSize represents buffer size for reading, it's set to 64k by default.
	ReadBufferSize int

	// MaxWriteBufferSize represents max write buffer size for Conn, it's set to 1m by default.
	// if the connection's Send-Q is full and the data cached by nbio is
	// more than MaxWriteBufferSize, the connection would be closed by nbio.
	MaxWriteBufferSize int

	// MaxWebsocketFramePayloadSize represents max payload size of websocket frame.
	MaxWebsocketFramePayloadSize int

	// MessageHandlerPoolSize represents max http server's task pool goroutine num, it's set to runtime.NumCPU() * 256 by default.
	MessageHandlerPoolSize int

	// WriteTimeout represents Conn's write time out when response to a HTTP request.
	WriteTimeout time.Duration

	// KeepaliveTime represents Conn's ReadDeadline when waiting for a new request, it's set to 120s by default.
	KeepaliveTime time.Duration

	// LockListener represents listener's goroutine to lock thread or not, it's set to false by default.
	LockListener bool

	// LockPoller represents poller's goroutine to lock thread or not, it's set to false by default.
	LockPoller bool

	// DisableSendfile .
	DisableSendfile bool

	// ReleaseWebsocketPayload automatically release data buffer after function each call to websocket OnMessage or OnDataFrame.
	ReleaseWebsocketPayload bool

	// RetainHTTPBody represents whether to automatically release HTTP body's buffer after calling HTTP handler.
	RetainHTTPBody bool

	// MaxConnReadTimesPerEventLoop represents max read times in one poller loop for one fd.
	MaxConnReadTimesPerEventLoop int

	// Handler sets HTTP handler for Engine.
	Handler http.Handler

	// ServerExecutor sets the executor for data reading callbacks.
	ServerExecutor func(f func())

	// ClientExecutor sets the executor for client callbacks.
	ClientExecutor func(f func())

	// TLSAllocator sets the buffer allocator for TLS.
	TLSAllocator tls.Allocator

	// BodyAllocator sets the buffer allocator for HTTP.
	BodyAllocator mempool.Allocator

	// Context sets common context for Engine.
	Context context.Context

	// Cancel sets the cancel func for common context.
	Cancel func()

	// SupportServerOnly .
	SupportServerOnly bool

	// IOMod represents io mod, it is set to IOModNonBlocking by default.
	IOMod int
	// MaxBlockingOnline represents max blocking conn's online num.
	MaxBlockingOnline int
	// BlockingReadBufferSize represents read buffer size of blocking mod.
	BlockingReadBufferSize int

	// EpollMod .
	EpollMod uint32
	// EPOLLONESHOT .
	EPOLLONESHOT uint32

	// ReadBufferPool .
	ReadBufferPool mempool.Allocator

	// WebsocketCompressor .
	WebsocketCompressor func(w io.WriteCloser, level int) io.WriteCloser

	// WebsocketDecompressor .
	WebsocketDecompressor func(r io.Reader) io.ReadCloser

	// AsyncReadInPoller represents how the reading events and reading are handled
	// by epoll goroutine:
	// true : epoll goroutine handles the reading events only, another goroutine
	//        pool will handles the reading.
	// false: epoll goroutine handles both the reading events and the reading.
	//        false is by defalt.
	AsyncReadInPoller bool
	// IOExecute is used to handle the aysnc reading, users can customize it.
	IOExecute func(f func([]byte))
}

Config .

type Conn added in v1.3.20 

type Conn struct {
	net.Conn
	Parser    *Parser
	Trasfered bool
}

type EmptyProcessor 

type EmptyProcessor struct{}

EmptyProcessor .

func (*EmptyProcessor) Clean added in v1.4.0 

func (p *EmptyProcessor) Clean(parser *Parser)

Clean .

func (*EmptyProcessor) Close added in v1.1.4 

func (p *EmptyProcessor) Close(parser *Parser, err error)

Close .

func (*EmptyProcessor) OnBody 

func (p *EmptyProcessor) OnBody(parser *Parser, data []byte) error

OnBody .

func (*EmptyProcessor) OnComplete 

func (p *EmptyProcessor) OnComplete(parser *Parser)

OnComplete .

func (*EmptyProcessor) OnContentLength 

func (p *EmptyProcessor) OnContentLength(parser *Parser, contentLength int)

OnContentLength .

func (*EmptyProcessor) OnHeader 

func (p *EmptyProcessor) OnHeader(parser *Parser, key, value string)

OnHeader .

func (*EmptyProcessor) OnMethod 

func (p *EmptyProcessor) OnMethod(parser *Parser, method string)

OnMethod .

func (*EmptyProcessor) OnProto 

func (p *EmptyProcessor) OnProto(parser *Parser, proto string) error

OnProto .

func (*EmptyProcessor) OnStatus 

func (p *EmptyProcessor) OnStatus(parser *Parser, code int, status string)

OnStatus .

func (*EmptyProcessor) OnTrailerHeader 

func (p *EmptyProcessor) OnTrailerHeader(parser *Parser, key, value string)

OnTrailerHeader .

func (*EmptyProcessor) OnURL 

func (p *EmptyProcessor) OnURL(parser *Parser, uri string) error

OnURL .

type Engine added in v1.2.4 

type Engine struct {
	*nbio.Engine
	Config

	CheckUtf8 func(data []byte) bool

	BaseCtx context.Context
	Cancel  func()

	ExecuteClient func(f func())
	// contains filtered or unexported fields
}

Engine .

func NewEngine added in v1.2.4 

func NewEngine(conf Config) *Engine

NewEngine .

func (*Engine) AddConnNonTLSBlocking added in v1.3.5 

func (engine *Engine) AddConnNonTLSBlocking(conn *Conn, tlsConfig *tls.Config, decrease func())

AddConnNonTLSBlocking .

func (*Engine) AddConnNonTLSNonBlocking added in v1.3.5 

func (engine *Engine) AddConnNonTLSNonBlocking(conn *Conn, tlsConfig *tls.Config, decrease func())

AddConnNonTLSNonBlocking .

func (*Engine) AddConnTLSBlocking added in v1.3.5 

func (engine *Engine) AddConnTLSBlocking(conn *Conn, tlsConfig *tls.Config, decrease func())

AddConnTLSBlocking .

func (*Engine) AddConnTLSNonBlocking added in v1.3.5 

func (engine *Engine) AddConnTLSNonBlocking(conn *Conn, tlsConfig *tls.Config, decrease func())

AddConnTLSNonBlocking .

func (*Engine) AddTransferredConn added in v1.3.14 

func (engine *Engine) AddTransferredConn(nbc *nbio.Conn) error

AddTransferredConn .

func (*Engine) DataHandler added in v1.2.4 

func (e *Engine) DataHandler(c *nbio.Conn, data []byte)

DataHandler .

func (*Engine) DialerOnline added in v1.3.19 

func (e *Engine) DialerOnline() int

DialerOnline .

func (*Engine) OnClose added in v1.2.4 

func (e *Engine) OnClose(h func(c net.Conn, err error))

OnClose registers callback for disconnected.

func (*Engine) OnOpen added in v1.2.4 

func (e *Engine) OnOpen(h func(c net.Conn))

OnOpen registers callback for new connection.

func (*Engine) OnStop added in v1.2.4 

func (e *Engine) OnStop(h func())

OnStop registers callback before Engine is stopped.

func (*Engine) Online added in v1.2.4 

func (e *Engine) Online() int

Online .

func (*Engine) SetETAsyncRead added in v1.5.4 

func (e *Engine) SetETAsyncRead()

SetETAsyncRead .

func (*Engine) SetLTSyncRead added in v1.5.4 

func (e *Engine) SetLTSyncRead()

SetLTSyncRead .

func (*Engine) Shutdown added in v1.2.4 

func (e *Engine) Shutdown(ctx context.Context) error

Shutdown .

func (*Engine) Start added in v1.2.7 

func (e *Engine) Start() error

Start .

func (*Engine) Stop added in v1.2.7 

func (e *Engine) Stop()

Stop .

func (*Engine) TLSDataHandler added in v1.2.4 

func (e *Engine) TLSDataHandler(c *nbio.Conn, data []byte)

TLSDataHandler .

type Parser 

type Parser struct {
	ParserCloser ParserCloser

	Engine *Engine

	// Underlayer Conn.
	Conn net.Conn

	// used to call message handler when got a full Request/Response.
	Execute func(f func()) bool

	Processor Processor
	// contains filtered or unexported fields
}

Parser .

func NewParser 

func NewParser(conn net.Conn, engine *Engine, processor Processor, isClient bool, executor func(f func()) bool) *Parser

NewParser creates an HTTP parser.

func (*Parser) CloseAndClean added in v1.4.0 

func (p *Parser) CloseAndClean(err error)

CloseAndClean closes the underlayer connection and cleans up related.

func (*Parser) OnClose added in v1.2.4 

func (p *Parser) OnClose(h func(p *Parser, err error))

OnClose registers callback for closing.

func (*Parser) Parse added in v1.5.4 

func (p *Parser) Parse(data []byte) error

Parse parses data bytes and calls HTTP handler when full request received. If the connection is upgraded, it passes the data bytes to the ParserCloser and doesn't parse them itself any more.

func (*Parser) UnderlayerConn added in v1.4.0 

func (p *Parser) UnderlayerConn() net.Conn

type ParserCloser added in v1.5.4 

type ParserCloser interface {
	UnderlayerConn() net.Conn
	Parse(data []byte) error
	CloseAndClean(err error)
}

type Processor 

type Processor interface {
	OnMethod(parser *Parser, method string)
	OnURL(parser *Parser, uri string) error
	OnProto(parser *Parser, proto string) error
	OnStatus(parser *Parser, code int, status string)
	OnHeader(parser *Parser, key, value string)
	OnContentLength(parser *Parser, contentLength int)
	OnBody(parser *Parser, data []byte) error
	OnTrailerHeader(parser *Parser, key, value string)
	OnComplete(parser *Parser)
	Close(parser *Parser, err error)
	Clean(parser *Parser)
}

Processor .

func NewClientProcessor 

func NewClientProcessor(conn *ClientConn, handler func(res *http.Response, err error)) Processor

NewClientProcessor .

func NewEmptyProcessor 

func NewEmptyProcessor() Processor

NewEmptyProcessor .

func NewServerProcessor 

func NewServerProcessor() Processor

NewServerProcessor .

type Response 

type Response struct {
	Parser *Parser
	// contains filtered or unexported fields
}

Response represents the server side of an HTTP response.

func NewResponse 

func NewResponse(parser *Parser, request *http.Request) *Response

NewResponse .

func (*Response) Header 

func (res *Response) Header() http.Header

Header .

func (*Response) Hijack 

func (res *Response) Hijack() (net.Conn, *bufio.ReadWriter, error)

Hijack .

func (*Response) ReadFrom 

func (res *Response) ReadFrom(r io.Reader) (n int64, err error)

ReadFrom .

func (*Response) Write 

func (res *Response) Write(data []byte) (int, error)

Write .

func (*Response) WriteHeader 

func (res *Response) WriteHeader(statusCode int)

WriteHeader .

func (*Response) WriteString added in v1.1.22 

func (res *Response) WriteString(s string) (int, error)

WriteString .

type Server 

type Server struct {
	*Engine
}

Server .

func NewServer 

func NewServer(conf Config, v ...interface{}) *Server

NewServer .

func NewServerTLS 

func NewServerTLS(conf Config, v ...interface{}) *Server

NewServerTLS .

type ServerProcessor 

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

ServerProcessor is used for server side connection.

func (*ServerProcessor) Clean added in v1.4.0 

func (p *ServerProcessor) Clean(parser *Parser)

Clean .

func (*ServerProcessor) Close added in v1.1.4 

func (p *ServerProcessor) Close(parser *Parser, err error)

Close .

func (*ServerProcessor) OnBody 

func (p *ServerProcessor) OnBody(parser *Parser, data []byte) error

OnBody .

func (*ServerProcessor) OnComplete 

func (p *ServerProcessor) OnComplete(parser *Parser)

OnComplete .

func (*ServerProcessor) OnContentLength 

func (p *ServerProcessor) OnContentLength(parser *Parser, contentLength int)

OnContentLength .

func (*ServerProcessor) OnHeader 

func (p *ServerProcessor) OnHeader(parser *Parser, key, value string)

OnHeader .

func (*ServerProcessor) OnMethod 

func (p *ServerProcessor) OnMethod(parser *Parser, method string)

OnMethod .

func (*ServerProcessor) OnProto 

func (p *ServerProcessor) OnProto(parser *Parser, proto string) error

OnProto .

func (*ServerProcessor) OnStatus 

func (p *ServerProcessor) OnStatus(parser *Parser, code int, status string)

OnStatus .

func (*ServerProcessor) OnTrailerHeader 

func (p *ServerProcessor) OnTrailerHeader(parser *Parser, key, value string)

OnTrailerHeader .

func (*ServerProcessor) OnURL 

func (p *ServerProcessor) OnURL(parser *Parser, rawurl string) error

OnURL .

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