moonraker/api_changes.md at 43d8e181beb02b588897238566243e98048229ec

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This document keeps a record of all changes to Moonraker's remote facing APIs.

September 30th 2020

Two new endpoints have been added:
- GET /server/info (server.info)
- GET /server/gcode_store (server.gcode_store) See web_api.md for details on their usage.

September 7th 2020

A new websocket API has been added, server.files.delete_file:
```
{jsonrpc: "2.0", method: "server.files.delete_file", params:
{path: "<root>/<file_name>"}, id: <request id>}
```
Where is either "gcodes" or "config", and <file_name> is the relative path to the file for deletion. For example: path: "gcodes/my_sub_dir/my_gcode_file.gcode"

September 3rd 2020

The Websocket APIs have changed for clarity. The APIs methods now use namespaces similar to those found in common programming languages. This change affects all websocket APIs, however websocket events have not changed. Below is a chart mapping the Previous API to the New API:

Previous Websocket Method	New Websocket Method
get_printer_info	printer.info
post_printer_emergency_stop	printer.emergency_stop
post_printer_restart	printer.restart
post_printer_firmware_restart	printer.firmware_restart
get_printer_objects_list	printer.objects.list
get_printer_objects_query	printer.objects.query
post_printer_objects_subscribe	printer.objects.subscribe
get_printer_query_endstops_status	printer.query_endstops.status
post_printer_gcode_script	printer.gcode.script
get_printer_gcode_help	printer.gcode.help
post_printer_print_start	printer.print.start
post_printer_print_pause	printer.print.pause
post_printer_print_resume	printer.print.resume
post_printer_print_cancel	printer.print.cancel
post_machine_reboot	machine.reboot
post_machine_shutdown	machine.shutdown
get_server_temperature_store	server.temperature_store
get_file_list	server.files.list
get_file_metadata	server.files.metadata
get_directory	server.files.get_directory
post_directory	server.files.post_directory
delete_directory	server.files.delete_directory
post_file_move	server.files.move
post_file_copy	server.files.copy

The "power" plugin APIs have changed. This affects both HTTP and Websocket APIs. They were originally added to the "/printer" path, however this adds the possibility of a naming conflict. The new APIs are as follows:
- GET /machine/gpio_power/devices : machine.gpio_power.devices
- GET /machine/gpio_power/status : machine.gpio_power.status
- POST /machine/gpio_power/on : machine.gpio_power.on
- POST /machine/gpio_power/off : machine.gpio_power.off

September 1st 2020

A new notification has been added: notify_metdata_update. This notification is sent when Moonraker parses metdata from a new upload. Note that the upload must be made via the API, files manually (using SAMBA, SCP, etc) do not trigger a notification. The notification is sent in the following format:

{jsonrpc: "2.0", method: "notify_metadata_update", params: [metadata]}

Where metadata is an object in the following format:

{
  filename: "file name",
  size: <file size>,
  modified: "last modified date",
  slicer: "Slicer Name",
  first_layer_height: <in mm>,
  layer_height: <in mm>,
  object_height: <in mm>,
  estimated_time: <time in seconds>,
  filament_total: <in mm>,
  thumbnails: [
    {
      width: <in pixels>,
      height: <in pixels>,
      size: <length of string>,
      data: <base64 string>
    }, ...
  ]
}

August 16th 2020

The structure of data returned from /printer/info (get_printer_info) has changed to the following format:

{
    state: "<klippy state>",
    state_message: "<current state message>",
    hostname: "<hostname>",
    software_version: "<version>",
    cpu_info: "<cpu_info>",
    klipper_path: "<moonraker use only>",
    python_path: "<moonraker use only>",
    log_file: "<moonraker use only>",
    config_file: "<moonraker use only>",
}

The "state" item can be one of the following:

"startup" - Klippy is in the process of starting up
"ready" - Klippy is ready
"shutdown" - Klippy has shutdown
"error" - Klippy has experienced an error during startup

The message from each state can be found in the state_message.

A webhooks printer object has been added, available for subscription or query. It includes the following items:
- state - Printer state identical to that returned from /printer/info
- state_message - identical to that returned from /printer/info

/printer/objects/status (get_printer_objects_status) has been renamed to /printer/objects/query (get_printer_objects_query). The format of the websocket request has changed, it should now look like the following:

{
    jsonrpc: "2.0",
    method: "get_printer_objects_query",
    params: {
        objects: {
          gcode: null,
          toolhead: ["position", "status"]
        }
    },
    id: <request id>
}

As shown above, printer objects are now wrapped in an "objects" parameter. When a client wishes to subscribe to all items of a printer object, they should now be set to null rather than an empty array. The return value has also changed:

{
  eventtime: <klippy time of update>,
  status: {
    gcode: {
      busy: true,
      gcode_position: [0, 0, 0 ,0],
      ...},
    toolhead: {
      position: [0, 0, 0, 0],
      status: "Ready",
      ...},
    ...}
  }

The status item now contains the requested status.

/printer/objects/subscription (post_printer_objects_subscription) is now printer/objects/subscribe (post_printer_objects_subscribe). This request takes parameters in the same format as the query. It now returns state for all currently subscribed objects (in the same format as a query). This data can be used to initialize all local state after the request completes.
Subscriptions are now pushed as "diffs". Clients will only recieve updates for subscribed items when that data changes. This requires that clients initialize their local state with the data returned from the subscription request.
The structure of data returned from /printer/objects/list has changed. It now returns an array of available printer objects:
```
{ objects: ["gcode", "toolhead", "bed_mesh", "configfile",....]}
```
The notify_klippy_state_changed notification has been removed. Clients can subscribe to webhooks and use webhooks.state to be notified of transitions to the "ready" and "shutdown" states
A notify_klippy_disconnected event has been added to notify clients when the connection between Klippy and Moonraker has been terminated. This event is sent with no parameters:
```
{jsonrpc: "2.0", method: "notify_klippy_disconnected"}
```

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