2.

數(shù)據(jù)長度在

128-65525

之間時

,

Payload?Length

位設(shè)為

126

,

后面

額外使用

16bit

表

示長度

(

前面的

126

不再是長度的一部分

)

3.

數(shù)據(jù)長度在

65526-2^64-1

之間時

,

Payload?Length

位設(shè)為

127

,

后面

額外使用

64bit

表示長度

(

前面的

127

不再是長度的一部分

)

1.

Fin?(bit?0):?determines?if?this?is?the?last?frame?in?the?message.?This?would?be

set?to?1?on?the?end?of?a?series?of?frames,?or?in?a?single-frame?message,?it?would

be?set?to?1?as?it?is?both?the?first?and?last?frame.

2.

RSV1,?RSV2,?RSV3?(bits?1-3):?these?three?bits?are?reserved?for?websocket

extensions,?and?should?be?0?unless?a?specific?extension?requires?the?use?of?any

of?these?bytes.

3.

Opcode?(bits?4-7):?these?four?bits?deterimine?the?type?of?the?frame.?Control

frames?communicate?WebSocket?state,?while?non-control?frames

communicate?data.?The?various?types?of?codes?include:

1.

x0:?continuation?frame;?this?frame?contains?data?that?should?be?appended?to

the?previous?frame

2.

x1:?text?frame;?this?frame?(and?any?following)?contains?text

3.

x2:?binary?frame;?this?frame?(and?any?following)?contains?binary?data

4.

x3?-?x7:?non-control?reserved?frames;?these?are?reserved?for?possible

websocket?extensions

5.

x8:?close?frame;?this?frame?should?end?the?connection

6.

x9:?ping?frame

7.

xA:?pong?frame

8.

xB?-?xF:?control?reserved?frames

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