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cURL cheat sheet

A Software › Linux cheat sheet in English by [deleted]

curl is the most powerful command in linux

Web Linux HTTP Curl Transfer
58,955 views 10,501 downloads 28 Feb 2014 History
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Follow Redirects

-L

Cookies

-b cookiejar
Send Cookies using cookiejar
-c cookiejar
Store Cookies in cookiejar
-b '­n1=v1; n2=v2'
Send raw cookies using -b

Send Binary Data

--data­-binary
@<f­ile­nam­e>
Does not process the file before sending. -d sends it in ASCII.

Insecure SSL

-k / --insecure
By default all insecure requests fail. With -k, insecure requests do not fail.

Authen­tic­ation

-u
<us­ern­ame­:pa­ssw­ord>

Proxy

-x <pr­oxy>
Example :
-x '­htt­p:/­/pr­oxy­:20­80'

Compre­ssion

--comp­ression
Curl accepts compre­ssion encoding formats : gzip, deflate

POST Data

-d
<@filename>
-d
<da­ta>
Adding an @ reads the data from file.

HTTP Method

-X
<Me­tho­d>
Specify method to use : POST, HEAD, PUT, GET, DELETE

Output to file

-o <fi­len­ame>

Write to file

-O
Writes output to file instead of stdout

Max operation time

-m <se­con­ds>

Connect Timeout

--conn­ect­-ti­meout <se­con­ds>
Specify maximum time allowed to connect to remote server

Write Out

-w
<fo­rma­t>
Defines what to display on stdout after a completed and successful operation.
curl -s -w '­%{r­emo­te_ip} %{time­_total} %{http­_code} \n' -o /dev/null http:/­/an­kush.io

Send Header

-H <he­ade­r>

User Agent

-A '­Use­r-A­gen­t-N­ame­'

Show Response Header

-i
Prints response headers along with response content.

HEAD Request

-I
Sends a HEAD request. Only response headers are printed.

Verbose output

-v
Useful to inspect headers
> means data sent by curl
< means data received by curl

Silent mode

-s
Does not output progress

Show Error

-S
When used with -s, this shows an error when it fails.

Exit Codes

6
Can't resolve host
7
Couldn­'t connect to host
28
Operation timeout
55
Failed to send data
56
Failed to receive data

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