I wish to send a header to my Apache server on a Linux box. How can I achieve this via a cURL call?

11 Answers

man curl:

 -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"

You can see the request that curl sent by adding the -v option.

GET:

with JSON:

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

with XML:

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

POST:

For posting data:

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

For file upload:

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

RESTful HTTP Post:

curl -X POST -d @filename

For logging into a site (auth):

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

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'));

Use -H or --header.

Man page:

GET (multiple parameters):

curl -X GET ""

curl --request GET ""

curl ""

curl -i -H "Application/json" -H "Content-type: application/json" ""

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) \ \ -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", } ] }'

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.

I've switched from curl to Httpie; the syntax looks like:

http HeaderName:value

In case you want send your custom headers, you can do it this way:

curl -v -H @{'custom_header'='custom_header_value'}

In anaconda envirement through windows the commands should be: GET, for ex:

curl.exe

Post or Patch the data for ex:

curl.exe -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

Here are the some curl commands for most common http methods.

Domain Object considered here is

@Data @NoArgsConstructor @AllArgsConstructor @Document @Validated public class Movie { @Id private String id; private String name; @NotNull private Integer year; @NotNull private List<String> cast; private LocalDate release_date; }

POST-CREATE-MOVIE

curl -i \ -d '{"id":1, "name": "Dhoom", "year":2004,"cast":["John Abraham", "Abhishek Bachan"],"release_date": "2004-06-15"}' \ -H "Content-Type: application/json" \ -X POST

GET-ALL-MOVIES

curl -i

GET-MOVIE-BY-ID

curl -i

PUT-UPDATE-MOVIE

curl -i \ -d '{"id":1, "name": "Dhoom", "year":2005,"cast":["John Abhraham", "Abhishek Bachhan", "Uday Chopra", "Isha Deol"],"release_date": "2005-03-25"}' \ -H "Content-Type: application/json" \ -X PUT