【DAY19】 socket编程的补充

1.大包发送

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udp限制64k,切割若干个小packet.

totalLength = x ;

perPack = 50k ;

count = x / 50 ; //计算包的数量

//组报文

2.URL:统一资源定位符。Uniform Resource Locator

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http://www.example.com/docs/resource1.html

HyperText Transfer Protocol

http://www.baidu.com:80/xx/x/x/x.txt

http://localhost:8080/xx/x/x/x.txt

http://www.baidu.com

protocal :// domain name : port / path

http://192.168.12.5:8080/a/b/c/d.txt?id=123&&name=tom

protocal : http

port : 8080

host : 192.168.12.5

authority : host : port //授权

file : /a/b/c/d.txt?id=123&&name=tom  //path + ? + query

path : /a/b/c/d.txt

query : id=123&&name=tom

header :消息头

body :消息主体