一、内容协商的两种方式 每个 URI 指向的资源可以是任何事物，可以有多种不同的表述，例如一份文档可以有不同语言的翻译、不同的媒体格式、可以针对不同的浏览器提 供不同的压缩
一、内容协商的两种方式
每个 URI 指向的资源可以是任何事物，可以有多种不同的表述，例如一份文档可以有不同语言的翻译、不同的媒体格式、可以针对不同的浏览器提
供不同的压缩编码等
二、Proactive 主动式内容协商
三、Reactive 响应式内容协商
四、常见的协商要素
1、常见协商要素1
2、常见协商要素2
内容编码：主要指压缩算法
响应中的压缩方式
五、国际化与本地化
六、资源表述的元数据头部
六、cURL工具使用
1、--compressed 将结果解压缩
命令
curl ‘https://www.baidu.com/‘ -H ‘Connection: keep-alive‘ -H ‘Pragma: no-cache‘ -H ‘Cache-Control: no-cache‘ -H ‘Upgrade-Insecure-Requests: 1‘ -H ‘User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36‘ -H ‘Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3‘ -H ‘Accept-Encoding: gzip, deflate, br‘ -H ‘Accept-Language: zh-CN,zh;q=0.9‘ -H ‘Cookie: BDUSS=Y3Ty0zbFdRbTBIWWdlZ0UtRjZpOGNzdFFtVXVzNTJiemxXNzdyc1lNak45ZkJjSVFBQUFBJCQAAAAAAAAAAAEAAACumLcCbHVvYWhvbmcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM1oyVzNaMlcRH; A^`=1570252928jMyG000154233; BAIDUID=D3466420B11AEE8C6DCE1776E360E57C:FG=1; PSTM=1570252049; BIDUPSID=9ED37D1EFAB864BCB9197CD7637AB8CC; BD_UPN=12314353; BDORZ=FFFB88E999055A3F8A630C64834BD6D0; H_PS_645EC=a521LDhJX1l%2BFB6jUNwQI7xetFq3k3%2FLeU6yK%2Fb70nZrV8c%2B%2FpIMx8OkrgfHWtqdpDC8; BD_HOME=1; H_PS_PSSID=1430_21124_29522_29720_29568_29220; sugstore=1‘ --compressed
运行结果
bds.comm.dpquery="";
bds.comm.samSugApi=s_session.sid === "25219" ? 1 : 0;
var index_content = $(‘#head‘);
var index_foot= $(‘#ftCon‘);
var index_css= $(‘#style_super_inline‘);
var index_is_css = $(‘#s_is_index_css‘);
var index_css_content = index_css.html();
var index_u= $(‘#u_sp‘);
var result_u= $(‘#u‘);
window.index_links = [];
var result_head = $("#head");
window.index_on=function(){
s_session.index_off = false;
};
window.index_off=function(){
s_session.index_off = true;
$(document.body).attr(‘link‘, ‘#0000cc‘);
index_links = [];
$("head").find("link").each(function(){
index_links.push(this);
$(this).remove();
});
index_css.remove();
index_is_css.remove();
$(‘#head_wrapper‘).css(‘width‘,‘‘);
$(‘#kw‘).css(‘font-family‘,‘‘);
$(‘head‘).append($.decodeHTML($(‘#s_index_off_css‘).html()));
$(‘head‘).append($.decodeHTML($(‘#s_is_result_css‘).html()));
$(‘.s-tips-skin‘).remove();
$(‘.s-skin-container‘).remove();
$(‘#s_mancard_newmusic‘).remove();
};
2、去掉--compressed 结果是二进制文件
curl ‘https://www.baidu.com/‘ -H ‘Connection: keep-alive‘ -H ‘Pragma: no-cache‘ -H ‘Cache-Control: no-cache‘ -H ‘Upgrade-Insecure-Requests: 1‘ -H ‘User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36‘ -H ‘Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3‘ -H ‘Accept-Encoding: gzip, deflate, br‘ -H ‘Accept-Language: zh-CN,zh;q=0.9‘ -H ‘Cookie: BDUSS=Y3Ty0zbFdRbTBIWWdlZ0UtRjZpOGNzdFFtVXVzNTJiemxXNzdyc1lNak45ZkJjSVFBQUFBJCQAAAAAAAAAAAEAAACumLcCbHVvYWhvbmcAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM1oyVzNaMlcRH; A^`=1570252928jMyG000154233; BAIDUID=D3466420B11AEE8C6DCE1776E360E57C:FG=1; PSTM=1570252049; BIDUPSID=9ED37D1EFAB864BCB9197CD7637AB8CC; BD_UPN=12314353; BDORZ=FFFB88E999055A3F8A630C64834BD6D0; H_PS_645EC=a521LDhJX1l%2BFB6jUNwQI7xetFq3k3%2FLeU6yK%2Fb70nZrV8c%2B%2FpIMx8OkrgfHWtqdpDC8; BD_HOME=1; H_PS_PSSID=1430_21124_29522_29720_29568_29220; sugstore=1‘
截图如下
3、去掉头部的压缩-H ‘Accept-Encoding: gzip, deflate, br‘
