I wish to send a header to my Apache server on a Linux box. How can I achieve this via a curl call?
This question is related to
curl
http-headers
The answer is
GET:
with JSON:
curl -i -H "Accept: application/json" -H "Content-Type: application/json" http://hostname/resource
with XML:
curl -H "Accept: application/xml" -H "Content-Type: application/xml" -X GET http://hostname/resource
POST:
For posting data:
curl --data "param1=value1¶m2=value2" http://hostname/resource
For file upload:
curl --form "[email protected]" http://hostname/resource
RESTful HTTP Post:
curl -X POST -d @filename http://hostname/resource
For logging into a site (auth):
curl -d "username=admin&password=admin&submit=Login" --dump-header headers http://localhost/Login
curl -L -b headers http://localhost/
-H/--header <header>
(HTTP) Extra header to use when getting a web page. You may specify
any number of extra headers. Note that if you should add a custom
header that has the same name as one of the internal ones curl would
use, your externally set header will be used instead of the internal
one. This allows you to make even trickier stuff than curl would
normally do. You should not replace internally set headers without
knowing perfectly well what you're doing. Remove an internal header
by giving a replacement without content on the right side of the
colon, as in: -H "Host:".
curl will make sure that each header you add/replace get sent with
the proper end of line marker, you should thus not add that as a
part of the header content: do not add newlines or carriage returns
they will only mess things up for you.
See also the -A/--user-agent and -e/--referer options.
This option can be used multiple times to add/replace/remove multi-
ple headers.
Example:
curl --header "X-MyHeader: 123" www.google.com
You can see the request that curl sent by adding the -v option.
I use Postman.
Execute whatever call you want to do. Then, postman provides a handy tool to show the curl code .
Run it in the terminal.
In case you want send your custom headers, you can do it this way:
curl -v -H @{'custom_header'='custom_header_value'} http://localhost:3000/action?result1=gh&result2=ghk
Use -H or --header.
Man page: http://curl.haxx.se/docs/manpage.html#-H
-H/--header <header>
(HTTP) Extra header to use when getting a web page. You may specify
any number of extra headers. Note that if you should add a custom
header that has the same name as one of the internal ones curl would
use, your externally set header will be used instead of the internal
one. This allows you to make even trickier stuff than curl would
normally do. You should not replace internally set headers without
knowing perfectly well what you're doing. Remove an internal header
by giving a replacement without content on the right side of the
colon, as in: -H "Host:".
curl will make sure that each header you add/replace get sent with
the proper end of line marker, you should thus not add that as a
part of the header content: do not add newlines or carriage returns
they will only mess things up for you.
See also the -A/--user-agent and -e/--referer options.
This option can be used multiple times to add/replace/remove multi-
ple headers.
Example:
curl --header "X-MyHeader: 123" www.google.com
You can see the request that curl sent by adding the -v option.
You can also send multiple headers, data (JSON for example), and specify Call method (POST,GET) into a single CUrl call like this:
curl -X POST(Get or whatever) \
http://your_url.com/api/endpoint \
-H 'Content-Type: application/json' \
-H 'header-element1: header-data1' \
-H 'header-element2: header-data2' \
......more headers................
-d '{
"JsonExArray": [
{
"json_prop": "1",
},
{
"json_prop": "2",
}
]
}'
In anaconda envirement through windows the commands should be: GET, for ex:
curl.exe http://127.0.0.1:5000/books
Post or Patch the data for ex:
curl.exe http://127.0.0.1:5000/books/8 -X PATCH -H "Content-Type: application/json" -d '{\"rating\":\"2\"}'
PS: Add backslash for json data to avoid this type of error => Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)
and use curl.exe instead of curl only to avoid this problem:
Invoke-WebRequest : Cannot bind parameter 'Headers'. Cannot convert the "Content-Type: application/json" value of type
"System.String" to type "System.Collections.IDictionary".
At line:1 char:48
+ ... 0.1:5000/books/8 -X PATCH -H "Content-Type: application/json" -d '{\" ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Invoke-WebRequest], ParameterBindingException
+ FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.InvokeWebRequestCommand
Use -H or --header.
Man page: http://curl.haxx.se/docs/manpage.html#-H
I've switched from curl to Httpie; the syntax looks like:
http http://myurl HeaderName:value
-H/--header <header>
(HTTP) Extra header to use when getting a web page. You may specify
any number of extra headers. Note that if you should add a custom
header that has the same name as one of the internal ones curl would
use, your externally set header will be used instead of the internal
one. This allows you to make even trickier stuff than curl would
normally do. You should not replace internally set headers without
knowing perfectly well what you're doing. Remove an internal header
by giving a replacement without content on the right side of the
colon, as in: -H "Host:".
curl will make sure that each header you add/replace get sent with
the proper end of line marker, you should thus not add that as a
part of the header content: do not add newlines or carriage returns
they will only mess things up for you.
See also the -A/--user-agent and -e/--referer options.
This option can be used multiple times to add/replace/remove multi-
ple headers.
Example:
curl --header "X-MyHeader: 123" www.google.com
You can see the request that curl sent by adding the -v option.
In case you want send your custom headers, you can do it this way:
curl -v -H @{'custom_header'='custom_header_value'} http://localhost:3000/action?result1=gh&result2=ghk
Use -H or --header.
Man page: http://curl.haxx.se/docs/manpage.html#-H
In PHP:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue'));
or you can set multiple:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue', 'HeaderName2:HeaderValue2'));
In anaconda envirement through windows the commands should be: GET, for ex:
curl.exe http://127.0.0.1:5000/books
Post or Patch the data for ex:
curl.exe http://127.0.0.1:5000/books/8 -X PATCH -H "Content-Type: application/json" -d '{\"rating\":\"2\"}'
PS: Add backslash for json data to avoid this type of error => Failed to decode JSON object: Expecting value: line 1 column 1 (char 0)
and use curl.exe instead of curl only to avoid this problem:
Invoke-WebRequest : Cannot bind parameter 'Headers'. Cannot convert the "Content-Type: application/json" value of type
"System.String" to type "System.Collections.IDictionary".
At line:1 char:48
+ ... 0.1:5000/books/8 -X PATCH -H "Content-Type: application/json" -d '{\" ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Invoke-WebRequest], ParameterBindingException
+ FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.InvokeWebRequestCommand
I've switched from curl to Httpie; the syntax looks like:
http http://myurl HeaderName:value
I use Postman.
Execute whatever call you want to do. Then, postman provides a handy tool to show the curl code .
Run it in the terminal.
GET (multiple parameters):
curl -X GET "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl --request GET "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl -i -H "Application/json" -H "Content-type: application/json" "http://localhost:3000/action?result1=gh&result2=ghk"
In PHP:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue'));
or you can set multiple:
curl_setopt($ch, CURLOPT_HTTPHEADER, array('HeaderName:HeaderValue', 'HeaderName2:HeaderValue2'));
You can also send multiple headers, data (JSON for example), and specify Call method (POST,GET) into a single CUrl call like this:
curl -X POST(Get or whatever) \
http://your_url.com/api/endpoint \
-H 'Content-Type: application/json' \
-H 'header-element1: header-data1' \
-H 'header-element2: header-data2' \
......more headers................
-d '{
"JsonExArray": [
{
"json_prop": "1",
},
{
"json_prop": "2",
}
]
}'
GET (multiple parameters):
curl -X GET "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl --request GET "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl "http://localhost:3000/action?result1=gh&result2=ghk"
or
curl -i -H "Application/json" -H "Content-type: application/json" "http://localhost:3000/action?result1=gh&result2=ghk"
Source: Stackoverflow.com