Curl view HTTP header response header information

Sunshine island Master 2020-11-13 10:32:22
curl view http header response

curl see HTTP Header Response header information , See the MIPO blog :curl see HTTP Header Response header information

1、curl -I see HTTP Response header information

curl -I













yg-mac:~ homer$ curl -I

HTTP/1.1 200 OK

Server: nginx

Date: Thu, 31 May 2018 03:51:08 GMT

Content-Type: text/html; charset=UTF-8

Connection: keep-alive

Vary: Accept-Encoding

Set-Cookie: PHPSESSID=d4kf789gvurb10p7g5pcqd80o6; path=/

Expires: Thu, 19 Nov 1981 08:52:00 GMT

Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0

Pragma: no-cache

Vary: proxys-bj


2、HTTP Response header information

1) HTTP Return code

  • 1xx:client Request server Has been received , Dealing with
  • 2xx: success   Express client request ,server The end has received 、 Understand and deal with
  • 3xx:client The request was redirected to others server【 Other URL】
  • 4xx: Express client The request is not correct ,server Can't identify
  • 5xx:server The end service is not normal

2) Cache-Control

web Site settings for caching ;

  • no-cache: Express server Don't allow client Set the cache ;client Each request requires a back-end service
  • max-age:server Set the cache time of the page ; The unit is seconds   namely :1 In an hour client Revisit Using the cache just now ; No more repeated access to the background server
  • private must-revalidate

3) Connection

server Whether to support long connection ; If keep-alive explain web Of server Supports long connections .

however TCP The long connection is bidirectional ; Must be client and server All support long connection ; To make a long connection .

commonly client 【 browser 】 Long connection is supported by default ; So as long as sever End supports long connections ; You can make long connections .



3、curl send out Get/Post request

1)get request

What we usually use most is curl Without any parameters , In fact, this is get request ; Put all the parameters in http://xx Back

curl ""


2)post request

curl -d ''
curl -H "Content-Type:application/json" -X POST -d '{"post_data":""}' ''


3) Upload files

curl -F 'csl=@/home/xxxx/xxx.csl' -F 'tag=xxx' -F 'category=full' ""


curl HTTP Header

about "User-Agent", "Cookie", "Host" This kind of standard HTTP Header field , There's usually another way to set it up .

curl The command provides specific options to set these header fields :

  • -A (or --user-agent): Set up "User-Agent" Field .
  • -b (or --cookie): Set up "Cookie" Field .
  • -e (or --referer): Set up "Referer" Field .

for example , The following two commands are equivalent . Both commands are equally true HTTP The head of the "User-Agent" The string has been changed .



$ curl -H "User-Agent: my browser" ""

$ curl -A "my browser" ""


wget It's another one similar to curl, It can be used to get URL Command line tools for .

wget It also allows you to use a custom HTTP head .

Click on   here   see wget Command details .



1)with JSON

curl -i -H "Accept: application/json" -H "Content-Type: application/json"


2)with XML

curl -H "Accept: application/xml" -H "Content-Type: application/xml" -X GET



1)For posting data

curl --data "param1=value1&param2=value2"


2)For file upload

curl --form "fileupload=@filename.txt"


3)RESTful HTTP Post

curl -X POST -d @filename


4)For logging into a site (auth)

curl -d "username=admin&password=admin&submit=Login" --dump-header headers curl -L -b headers


本文为[Sunshine island Master]所创,转载请带上原文链接,感谢

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