HTTP POST and GET using cURL in Linux [duplicate]

Question

I have a server application written in ASP.NET on Windows that provides a web service.

How can I call the web service in Linux with cURL?

Answer 1

*nix provides a nice little command which makes our lives a lot easier.

GET:

with JSON:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET 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&param2=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/ 

Pretty-printing the curl results:

For JSON:

If you use npm and nodejs, you can install json package by running this command:

npm install -g json 

Usage:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://hostname/resource | json 

If you use pip and python, you can install pjson package by running this command:

pip install pjson 

Usage:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://hostname/resource | pjson 

If you use Python 2.6+, json tool is bundled within.

Usage:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://hostname/resource | python -m json.tool 

If you use gem and ruby, you can install colorful_json package by running this command:

gem install colorful_json 

Usage:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://hostname/resource | cjson 

If you use apt-get (aptitude package manager of your Linux distro), you can install yajl-tools package by running this command:

sudo apt-get install yajl-tools 

Usage:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://hostname/resource |  json_reformat 

For XML:

If you use *nix with Debian/Gnome envrionment, install libxml2-utils:

sudo apt-get install libxml2-utils 

Usage:

curl -H "Accept: application/xml" -H "Content-Type: application/xml" -X GET http://hostname/resource | xmllint --format - 

or install tidy:

sudo apt-get install tidy 

Usage:

curl -H "Accept: application/xml" -H "Content-Type: application/xml" -X GET http://hostname/resource | tidy -xml -i - 

Saving the curl response to a file

curl http://hostname/resource >> /path/to/your/file 

or

curl http://hostname/resource -o /path/to/your/file 

For detailed description of the curl command, hit:

man curl 

For details about options/switches of the curl command, hit:

curl -h 

Answer 2

I think Amith Koujalgi is correct but also, in cases where the webservice responses are in JSON then it might be more useful to see the results in a clean JSON format instead of a very long string. Just add | grep }| python -mjson.tool to the end of curl commands here is two examples:

GET approach with JSON result

curl -i -H "Accept: application/json" http://someHostName/someEndpoint | grep }| python -mjson.tool  

POST approach with JSON result

curl -X POST  -H "Accept: Application/json" -H "Content-Type: application/json" http://someHostName/someEndpoint -d '{"id":"IDVALUE","name":"Mike"}' | grep }| python -mjson.tool