Block that sends HTTP requests to trigger commands on blocks (or services) in the same instance.

• basic_auth_creds: When using Basic Authentication, enter the username and password.
• block_name: Name of block to command. If blank, then the service will be commanded.
• command_name: Name of service or block command.
• host: Location of nio instance.
• key_config_file: When using OAuth, enter the location of the Service Account JSON key file. The path is relative to the root of the nio project. (ex. etc/private_key.json)
• params: Key/Value pairs to pass as parameters to the command.
• port: Port of nio instance.
• reauth_interval: How frequently to re-authenticate OAuth login.
• security_method: HTTP Method (ex. NONE, BASIC (default), OAUTH).
• service_name: Name of service to command.

• default: Any list of signals.

• default: One output signal will be created for each command (and therefore one for each input signal).
  If the command response is json, then the Signal representation of the json will be emitted.
  If the command response is not json, then the Signals will have an attribtue resp with the text representaion of the response as the value.

• requests
• oauth2client

In order to command a nio instance secured by OAuth, you will need a Google Service Account and access to its JSON key.

1. Go to the Google Developers Console. Select your project (or create one!)
2. Go to APIs & Auth > Credentials
3. Click on Create new Client ID
4. Select Service Account and wait for the key pair to be created.
5. Write down the email address that is created.
6. Once created, click Generate new JSON Key and download and save the JSON file.
7. Place this file in one of the following locations, and note the filename:

• Next to the block file
• In the project directory (the default block setting is to put the file at the root of the nio project and name the file private_key.json)

7. In the block config, put the location of the file in the Private Key Config File config.
8. Grant access to the Service Account in the nio project that will be commanded. In the target nio project, add the email address from step 5 to the list of users in etc/roles.dat. Set the access groups that this user should belong to.