Struct ClientBuilder 

pub struct ClientBuilder<U> { /* private fields */ }

A builder for creating a ComfyUIClient instance.

This builder helps initialize the client with the provided base URL and sets up a websocket connection to stream events.

Implementations

impl<U: IntoUrl> ClientBuilder<U>

pub fn new(base_url: U) -> Self

Creates a new ClientBuilder instance.

Parameters

• base_url: The base URL of the ComfyUI service.

Returns

A new instance of ClientBuilder wrapped in a ClientResult, or an error if the URL is invalid.

pub fn channel_bound(self, channel_bound: usize) -> Self

Sets the capacity of the internal channel used for event streaming.

This controls how many events can be buffered before backpressure is applied. The default value is 100.

Parameters

• channel_bound: The maximum number of events the channel can hold.

Returns

The updated ClientBuilder instance.

pub fn reconnect_web_socket(self, reconnect: bool) -> Self

Sets whether the websocket should attempt to reconnect automatically when disconnected.

By default, reconnection is enabled (true).

Parameters

• reconnect: Whether to attempt reconnection when the WebSocket connection drops unexpectedly.

Returns

The updated ClientBuilder instance.

pub async fn build(self) -> ClientResult<(ComfyUIClient, EventStream)>

Builds the ComfyUIClient along with an associated EventStream and a background task handle.

This method establishes a websocket connection and spawns an asynchronous task to process incoming messages. If reconnection is enabled, the task will automatically attempt to reconnect when the WebSocket connection drops unexpectedly.

Returns

A tuple containing:

• The ComfyUIClient for HTTP API interactions
• An EventStream for receiving real-time events

The WebSocket connection will be automatically closed when the EventStream is dropped, as the background task managing the connection terminates when the stream is no longer being consumed.

Returns an error if the initial connection cannot be established.

pub async fn build_only_http(self) -> ClientResult<ComfyUIClient>

Builds a ComfyUIClient instance configured for HTTP-only communication.

This method initializes the client without establishing a websocket connection, enabling you to interact with the ComfyUI service using only HTTP (REST) requests.

Returns

A ComfyUIClient instance on success, or an error.