Util

Various tests

POST /api/util/test

Provides commands to test paths or URLs for correctness.

Used by OctoPrint to validate paths or URLs that the user needs to enter in the settings.

The following commands are supported at the moment:

path

Tests whether or provided path exists and optionally if it also is either a file or a directory and whether OctoPrint’s user has read, write and/or execute permissions on it. Supported parameters are:

path: The file system path to test. Mandatory.

check_type: file or dir if the path should not only be checked for existence but also whether it is of the specified type. Optional.

check_access: A list of any of r, w and x. If present it will also be checked if OctoPrint has read, write, execute permissions on the specified path.

allow_create_dir: If check_type is provided and set to dir, this will allow OctoPrint to create the target path as a directory if it doesn’t yet exist to allow for further tests.

check_writable_dir: If check_type is provided and set to dir, this will check that the provided path is a writable directory. OctoPrint not only check if the permissions on the directory allow for writing but also attempt to write (and delete) a small test file .testballoon.txt to the directory to test if writing is actually possible.

The path command returns a 200 OK with a path test result when the test could be performed. The status code of the response does NOT reflect the test result!

url

Tests whether a provided URL responds. Request method and expected status codes can optionally be specified as well. Supported parameters are:

url: The URL to test. Mandatory.

method: The request method to use for the test. Optional, defaults to HEAD.

timeout: A timeout for the request, in seconds. If no reply from the tested URL has been received within this time frame, the check will be considered a failure. Optional, defaults to 3 seconds.

validSsl: Whether to validate the SSL connection if the url happens to be an HTTPS URL or not. Optional, defaults to True.

status: The status code(s) or named status range(s) to test for. Can be either a single value or a list of either HTTP status codes or any of the following named status ranges:

informational: Status codes from 100 to 199

success: Status codes from 200 to 299

redirection: Status codes from 300 to 399

client_error: Status codes from 400 to 499

server_error: Status codes from 500 to 599

normal: Status codes from 100 to 399

error: Status codes from 400 to 599

any: Any status code starting from 100

The test will past the status code check if the status returned by the URL is within any of the specified ranges.

response: If set to either true, json or bytes, the response body and the response headers from the URL check will be returned as part of the check result as well. json will attempt to parse the response as json and return the parsed result. true or bytes will base64 encode the body and return that.

content_type_whitelist: Optional array of supported content types. If set and the URL returns a content type not included in this list, the test will fail. E.g. ["image/*", "text/plain"].

content_type_blacklist: Optional array of unsupported content types. If set and the URL returns a content type included in this list, the test will fail. E.g. ["video/*"]. Can be used together with content_type_whitelist to further limit broader content type definition, e.g. by putting image/* into the whitelist, but disallowing PNG by including image/png on the blacklist.

The url command returns 200 OK with a URL test result when the test could be performed. The status code of the response does NOT reflect the test result!

server

Tests whether a provided server identified by host and port can be reached. Protocol can optionally be specified as well. Supported parameters are:

host: The host to test. IP or host name. Mandatory.

port: The port to test. Integer. Mandatory.

protocol: The protocol to test with. tcp or udp. Optional, defaults to tcp.

timeout: A timeout for the test, in seconds. If no successful connection to the server could be established within this time frame, the check will be considered a failure. Optional, defaults to 3.05 seconds.

The server command returns 200 OK with a Server test result when the test could be performed. The status code of the response does NOT reflect the test result!

resolution

Tests whether a provided hostname can be resolved (via DNS lookup). Supported parameters are:

name: The host name to test. Mandatory.

The resolution command returns 200 OK with a Resolution test result when the test could be performed. The status code of the response does NOT reflect the test result!

address

Tests whether a provided address (or, if none is provided, the client’s remote address) is a LAN address and if so returns the subnet specifier in CIDR format.

address: the address to test. If not set, the client’s remote address will be used

The address command return 200 OK with a Address test result when the test could be performed. The status code of the response does NOT reflect the test result!

Requires the ADMIN permission.

Example 1

Test whether a path exists and is a file readable and executable by OctoPrint.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "path",
  "path": "/some/path/to/a/file",
  "check_type": "file",
  "check_access": ["r", "x"]
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "path": "/some/path/to/a/file",
  "exists": true,
  "typeok": true,
  "access": true,
  "result": true
}

Example 2

Test whether a path exists which doesn’t exist.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "path",
  "path": "/some/path/to/a/missing_file",
  "check_type": "file",
  "check_access": ["r", "x"]
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "path": "/some/path/to/a/missing_file",
  "exists": false,
  "typeok": false,
  "access": false,
  "result": false
}

Example 3

Test whether a path exists and is a file which is a directory.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "path",
  "path": "/some/path/to/a/folder",
  "check_type": "file"
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "path": "/some/path/to/a/folder",
  "exists": true,
  "typeok": false,
  "access": true,
  "result": false
}

Example 4

Test whether a URL returns a normal status code for a HEAD request.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "url",
  "url": "http://example.com/some/url"
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "url": "http://example.com/some/url",
  "status": 200,
  "result": true
}

Example 5

Test whether a URL can be called at all via GET request, provide its raw body. Set a timeout of 1s.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "url",
  "url": "http://example.com/some/url",
  "method": "GET",
  "timeout": 1.0,
  "status": "any",
  "response": true
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "url": "http://example.com/some/url",
  "status": 200,
  "result": true,
  "response": {
    "headers": {
      "content-type": "image/gif"
    },
    "content": "R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"
  }
}

Example 6

Test whether a server is reachable on a given port via TCP.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "server",
  "host": "8.8.8.8",
  "port": 53
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "host": "8.8.8.8",
  "port": 53,
  "protocol": "tcp",
  "result": true
}

Example 7

Test whether a host name can be resolved successfully.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "resolution",
  "name": "octoprint"
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "name": "octoprint.org",
  "result": true
}

Example 8

Test whether the client’s address is a LAN address.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "address"
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "address": "192.168.1.3",
  "is_lan_address": true,
  "subnet": "192.168.0.0/16"
}

Example 9

Test whether 8.8.8.8 is a LAN address.

POST /api/util/test HTTP/1.1
Host: example.com
X-Api-Key: abcdef...
Content-Type: application/json

{
  "command": "address",
  "address": "8.8.8.8"
}

HTTP/1.1 200 OK
Content-Type: application/json

{
  "address": "8.8.8.8",
  "is_lan_address": false
}

JSON Parameters:

command – The command to execute, currently either path or url
path – path command only: the path to test
check_type – path command only: the type of path to test for, either file or dir
check_access – path command only: a list of access permissions to check for
allow_create_dir – path command and checktype of dir only: whether to allow creation of the directory if it doesn’t yet exist (true) or not (false, default)
check_writable_dir – path command and checktype of dir only: whether to test if the directory is writable by also trying to create a test file in it (true) or not (false, default)
url – url command only: the URL to test
status – url command only: one or more expected status codes
method – url command only: the HTTP method to use for the check
timeout – url and server commands only: the timeout for the test request
response – url command only: whether to include response data and if so in what form
host – server command only: the server to test
port – server command only: the port to test
protocol – server command only: the protocol to test
name – resolution command only: the host name to test
address – address command only: the address to test

Status Codes:

200 OK – No error occurred

Data model

Path test result

Name	Multiplicity	Type	Description
`path`	1	string	The path that was tested.
`exists`	1	bool	`true` if the path exists, `false` otherwise.
`typeok`	1	bool	`true` if a type check was not requested or it passed, `false` otherwise
`access`	1	bool	`true` if a permission check was not requested or it passed, `false` otherwise
`result`	1	bool	`true` if the overall check passed, `false` otherwise

URL test result

Name	Multiplicity	Type	Description
`url`	1	string	The URL that was tested.
`status`	1	int	The status code returned by the URL, 0 in case of a timeout.
`result`	1	bool	`true` if the check passed.
`response`	0..1	string or object	If `response` in the request was set to `bytes`: The base64 encoded body of the checked URL’s response. If `response` in the request was set to `json`: The json decoded body of the checked URL’s response. Not present if `response` in the request was not set.
`headers`	0..1	object	A dictionary with all headers of the checked URL’s response. Only present if `response` in the request was set.

Server test result

Name	Multiplicity	Type	Description
`host`	1	string	The host that was tested.
`port`	1	int	The port that was tested
`protocol`	1	string	The protocol that was tested, `tcp` or `udp`
`result`	1	bool	`true` if the check passed.

Resolution test result

Name	Multiplicity	Type	Description
`name`	1	string	The host name that was tested.
`result`	1	bool	`true` if the check passed.

Address test result

Name	Multiplicity	Type	Description
`address`	1	string	The address that was tested.
`is_lan_address`	1	bool	`true` if the address is a LAN address, false otherwise.
`subnet`	0..1	string	The detected subnet, if address is a LAN address.