How to update a TeamCity build parameter using REST+cURL - windows

Question

I have a configuration parameter called "testing" in one of my build configurations in TeamCity. After taking a look at the TeamCity REST API doc here I could get information about this parameter using the following cURL command line commands on Windows:
(1) curl -X GET -H "Authorization: Basic (...)" http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/parameters
(2) curl -X GET -H "Authorization: Basic (...)" http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/parameters/testing
Response:
(1) <?xml version="1.0" encoding="UTF-8" standalone="yes"?><property name="testing" value="11"/></properties>
(2) 11
But then, when I try to update this "testing" build parameter using the following command, I get an error message:
curl -X PUT -d "1" -H "Authorization: Basic (...)" http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/parameters/testing
Response:
Error has occurred during request processing (Unsupported Media Type).
Error: javax.ws.rs.WebApplicationException
Not supported request. Please check URL, HTTP method and transfered data are correct.
I already successfully use a similar command to update the buildNumberCounter setting of the same build configuration:
curl -X PUT -d "1" -H "Authorization: Basic (...)" http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/settings/buildNumberCounter
That's why I thought I can do the same with a build parameter in a similar way. What am I missing here?
UPDATE:
I managed to update the "testing" build parameter with value "1" using Fiddler. The request I composed had the following content:
Request: PUT
URL: http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/parameters/testing
Request headers: Authorization: Basic (...)
Request body: 1
So the problem with my cURL command above is probably somewhere around the -d "1" option. But where?
UPDATE 2:
I'm not sure if that makes any difference, but I use this cURL build on Windows 7.

Answer 1

Instead of fixing the failing cURL command, as a workaround, we use now Node.js to compose and send the REST request to TeamCity.
The script that needs to be fed to node.exe is as follows:
// Equivalent cURL command:
// curl -X PUT -d "1" -H "Authorization: Basic (...)" http://teamcity:8080/httpAuth/app/rest/buildTypes/id:bt7/parameters/testing
var http = require('http'),
options = {
hostname: 'teamcity',
port: 8080,
path: '/httpAuth/app/rest/buildTypes/id:bt7/parameters/testing',
method: 'PUT',
headers: { 'Authorization': 'Basic (...)' }
},
req;
req = http.request(options, function(res) { });
// write data to request body
req.write('1');
req.end();
Although the workaround works perfectly, I would still like to know what's wrong with the above cURL command?

Answer 2

For parameters that are non-XML like the one you are asking about, just add:
--Header "Content-Type: text/plain"
For parameters that are XML then you'll want to switch that to:
--Header "Content-Type: application/xml"

Answer 3

I was having a hard time figuring this out too but I found the answer. Instead of using -d and -H at the front. Use --data and --header at the end as shown below . I found this in the TeamCity docs buried in a "click to expand" example.
Set build number counter:
curl -v --basic --user <username>:<password> --request PUT http://<teamcity.url>/app/rest/buildTypes/<buildTypeLocator>/settings/buildNumberCounter --data <new number> --header "Content-Type: text/plain"
Set build number format:
curl -v --basic --user <username>:<password> --request PUT http://<teamcity.url>/app/rest/buildTypes/<buildTypeLocator>/settings/buildNumberPattern --data <new format> --header "Content-Type: text/plain"

Answer 4

I guess the REST API expect XML as input, add
-H "Content-type:text/xml"
and put XML as input. If you have a XML file file.xml :
curl -d "#/path/to/file.xml" -H "Content-type:text/xml" (...)