前端的性能优化是一个永不停歇的路程,优化的方式也不一而足,今天重点不在于介绍性能优化,而是介绍性能优化的其中一种方式,通过压缩来节省http请求的流量,实现过程中依赖http中header部分的两个字段,Accept-Encoding...首先我们先了解下Accept-Encoding和Content-Encoding的作用。 含义与作用 为什么首先要讲这两个字段的含义呢?...所以request请求header里的Accept-Encoding就是用来告诉服务端客户端是支持哪些编码方式的,一般的值有gzip/compress/deflate/br等,可以多个,中间用逗号隔开。...如: Accept-Encoding: gzip, deflate, br 复制代码 当服务端接收到请求,并且从header里拿到编码标识时,就可以选择其中一种方式来进行编码压缩,然后返给客户端,但是如果...综上,Accept-Encoding用来标识客户端能够理解的内容编码方式。 Content-Encoding用来标识主体进行了何种方式的内容编码转换。
在使用requests请求链接的时候,发现请求得到的内容总是一堆乱码: 此时请求的headers里的Accept-Encoding是这样写的: headers = { 'Accept-Encoding...当把Accept-Encoding里的gzip去掉后,才能得到正确的内容。...这里是因为压缩算法的原因,具体可参考:Accept-Encoding 发布者:全栈程序员栈长,转载请注明出处:https://javaforall.cn/159689.html原文链接:https://
Accept-Encoding和Content-Encoding Accept-Encoding和Content-Encoding是HTTP中用来对采用何种压缩格式传输正文进行协定的一对header。...工作原理如下: 浏览器发送请求,通过Accept-Encoding带上自己支持的内容编码格式列表 服务端从中挑选一个用来对正文进行编码,并通过Content-Encoding响应头指明响应编码格式。
how-to-properly-handle-a-gzipped-page-when-using-curl curl -X GET -H "Host:www.baidu.com" -H "Connection:Keep-Alive" -H "Accept-Encoding...http://www.baidu.com/" curl --compressed -X GET -H "Host:www.baidu.com" -H "Connection:Keep-Alive" -H "Accept-Encoding
公众号:知识浅谈 众所周知,在 HTTP 传输时是支持 gzip 压缩的,客户端发起请求时在请求头里增加 Accept-Encoding: gzip,服务端响应时在返回的头信息里增加 Content-Encoding...重点来了,但是有时候我们可能会在代码中加上Accept-Encoding: gzip 就是因为加了这个请求头,问题就来了,打印出来的响应信息是乱码,去掉请求头中的accept-encoding就ok了...的话,会自动进行解压,但是当我们添加了请求头就不自动解压了,具体代码如下 //如果返回的头信息里Content-Encoding = gzip,并且我们没有手动在请求头信息里设置 Accept-Encoding...("Range") == null) { //如果我们没有在请求头信息里增加Accept-Encoding,在这里会自动设置头信息 Accept-Encoding = gzip...transparentGzip = true; requestBuilder.header("Accept-Encoding", "gzip"); } List<Cookie
receive a request from: 10.22.34.48:54722 map[Accept-Encoding:[gzip] Connection:[close] User-Agent:[Go-http-client.../1.1]] receive a request from: 10.22.34.48:54724 map[Accept-Encoding:[gzip] Connection:[close] User-Agent...:[Go-http-client/1.1]] receive a request from: 10.22.34.48:54726 map[Accept-Encoding:[gzip] Connection...:[close] User-Agent:[Go-http-client/1.1]] receive a request from: 10.22.34.48:54728 map[Accept-Encoding...] Connection:[close] User-Agent:[Go-http-client/1.1]] receive a request from: 10.22.34.48:54731 map[Accept-Encoding
var transparentGzip = false if (userRequest.header("Accept-Encoding") == null && userRequest.header...("Range") == null) { transparentGzip = true requestBuilder.header("Accept-Encoding", "gzip...gzip // If we add an "Accept-Encoding: gzip" header field we're responsible for also decompressing...("Range") == null) { transparentGzip = true requestBuilder.header("Accept-Encoding", "gzip...") } 如果用户没有指定Accept-Encoding,且请求没有带Range字段时,可以自动转换为gzip。
OkHttp在发送请求的时候,会自动加入gzip请求头Accept-Encoding:gzip。...(Accept-Encoding和Content-Encoding是一对请求头,分别对应着请求和返回) 为什么要进行压缩呢?因为它能大幅减少传输的容量。...具体代码如下,当判断没有Accept-Encoding头的时候,就自行加入一个。...// If we add an "Accept-Encoding: gzip" header field we're responsible for also decompressing // the...", "gzip"); 也就是手动设置了Accept-Encoding头信息。
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0 Accept-Encoding...User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0 Accept-Encoding...User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0 Accept-Encoding...User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0 Accept-Encoding.../client/upload.php HTTP/1.1 Host: User-Agent: python-requests/2.31.0 Accept-Encoding
like Gecko) Chrome/98.0.4758.109 Safari/537.36', 'Referer': 'http://httpbin.org/', 'Accept-Encoding...like Gecko) Chrome/98.0.4758.109 Safari/537.36', 'Referer': 'http://httpbin.org/', 'Accept-Encoding...Safari/537.36', 'Origin': 'http://httpbin.org', 'Referer': 'http://httpbin.org/', 'Accept-Encoding...like Gecko) Chrome/98.0.4758.109 Safari/537.36', 'Referer': 'http://httpbin.org/', 'Accept-Encoding...like Gecko) Chrome/98.0.4758.109 Safari/537.36', 'Referer': 'http://httpbin.org/', 'Accept-Encoding
浏览器通过HTTP请求头部里加上Accept-Encoding,告诉服务器,“你可以用gzip,或者defalte算法压缩资源”。...Accept-Encoding:gzip, deflate 那么,在nodejs里,是如何对资源进行压缩的呢?答案就是Zlib模块。...首先判断 是否包含 accept-encoding 首部,且值为gzip。 否:返回未压缩的文件。 是:返回gzip压缩后的文件。...fileForGzip.html'; var server = http.createServer(function(req, res){ var acceptEncoding = req.headers['accept-encoding...hello world'; var server = http.createServer(function(req, res){ var acceptEncoding = req.headers['accept-encoding
注意:如果头里面有“-” ,例Accept-Encoding,则要headerValues[“Accept-Encoding”]) cookie 获得cookie对象(表示一个保存了所有cookie...,则要headerValues[“Accept-Encoding”] --%> ${header["Accept-Encoding"]} <br...,则要headerValues[“Accept-Encoding”] headerValues["Accept-Encoding"]返回的是一个string[]数组,headerValues...["Accept-Encoding"][0]取出数组中的第一个值 --%> ${headerValues["Accept-Encoding"][0]}...,则要header["Accept-Encoding"]、headerValues["Accept-Encoding"] 测试cookie时,例${cookie.key}取的是cookie对象,
代码如下:import requestsheaders = { "Accept-Encoding": "gzip, deflate, br",}param = '{"name":"tom"}'resp...果然是因为这个“br"算法导致的问题问题原因痛定思痛,捋一下思路,问题本身出在Content-Encoding与Accept-Encoding这2个header配置上面。...Content-Encoding与Accept-Encoding的说明当设置压缩格式后,服务器会根据用户设置的压缩格式对页面进行压缩,节省http请求的流量。...简单的说:Accept-Encoding:用来标识客户端能够理解的内容编码方式。Content-Encoding:用来标识主体进行了何种方式的内容编码转换。...Accept-Encoding 是HTTP协议的请求报文头,一般形式如"Accept-Encoding": "gzip, deflate, br"其中: gzip deflate br 压缩算法
10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36Accept: */*Accept-Encoding...AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36 Accept: */* Accept-Encoding...AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36 Accept: */* Accept-Encoding...AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36 Accept: */* Accept-Encoding
Request received: GET /7d HTTP/1.1 Host: 127.0.0.1:12306 User-Agent: PostmanRuntime/7.4.0 Accept: */* Accept-Encoding...Request received: GET /7d HTTP/1.1 Host: 127.0.0.1:12306 User-Agent: PostmanRuntime/7.4.0 Accept: */* Accept-Encoding...Request received: GET /7d HTTP/1.1 Host: 127.0.0.1:12306 User-Agent: PostmanRuntime/7.4.0 Accept: */* Accept-Encoding.../7d HTTP/1.1 Host: 127.0.0.1:12306 User-Agent: PostmanRuntime/7.4.0 Content-Length: 167 Accept: */* Accept-Encoding...GET /zuozewei/7d/12345 HTTP/1.1 Host: 127.0.0.1:12306 User-Agent: PostmanRuntime/7.4.0 Accept: */* Accept-Encoding
首先,发送以下请求以添加包含邪恶 SpEL 表达式的路由器: POST /actuator/gateway/routes/hacktest HTTP/1.1 Host: localhost:8080 Accept-Encoding...SpEL 表达式将在此步骤中执行: POST /actuator/gateway/refresh HTTP/1.1 Host: localhost:8080 Accept-Encoding: gzip...Content-Length: 0 第三,发送以下请求以检索结果: GET /actuator/gateway/routes/hacktest HTTP/1.1 Host: localhost:8080 Accept-Encoding...最后,发送一个 DELETE 请求来删除我们的恶意路由器: DELETE /actuator/gateway/routes/hacktest HTTP/1.1 Host: localhost:8080 Accept-Encoding
SaveXxxxxImageName=this_is_image.jpg HTTP/1.1 Host: xxxxx.com Connection: close User-Agent: Mozilla/5.0 Accept-Encoding...XXXXX/Pictures&SaveXxxxxImageName= HTTP/1.1 Host: xxxxx.com Connection: close User-Agent: Mozilla/5.0 Accept-Encoding.../etc/&SaveXxxxxImageName=passwd HTTP/1.1 Host: xxxxx.com Connection: close User-Agent: Mozilla/5.0 Accept-Encoding.../&SaveXxxxxImageName= HTTP/1.1 Host: xxxxx.com Connection: close User-Agent: Mozilla/5.0 Accept-Encoding...SaveXxxxxImageName=.bash_profile HTTP/1.1 Host: xxxxx.com Connection: close User-Agent: Mozilla/5.0 Accept-Encoding
当客户端可以处理压缩内容时,客户端必须通过发送请求头上的Accept-Encoding 通知服务器它的能力。...中间件使用这个信息来选择provider,在请求的Accept-Encoding 头上的列表的基础上。...在示例项目上,客户端提交请求,带有Accept-Encoding: mycustomcompression头。...为了指导客户端和代理(client and proxy)缓存多个存在的版本,并且存储,Vary 头是被加到Accept-Encoding 值。...头被移除了, Accept-Encoding头的移除阻止了中间件压缩响应。
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