@saintno/comfyui-sdk
v0.2.29
Published
SDK for ComfyUI
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Readme
ComfyUI API Client
A comprehensive Node.js client library for interacting with ComfyUI APIs. This powerful and flexible library provides a robust set of tools for managing ComfyUI instances, building prompts, and executing workflows with ease and type safety.
Table of Contents
- Features
- Installation
- Core Concepts
- Basic Usage
- Advanced Usage
- API Reference
- Configuration
- Error Handling
- Best Practices
- Contributing
- License
Features
- Multi-instance Support: Manage multiple ComfyUI instances with an intuitive connection pooling system.
- Type-safe Prompt Building: Construct workflows with a powerful
PromptBuilder
that ensures type safety for inputs and outputs. - Real-time Updates: WebSocket support for receiving live updates during workflow execution.
- Robust Error Handling: Automatic reconnection and comprehensive error management.
- Authentication Support: Built-in support for basic authentication (ComfyUI behind NginX with basic auth).
- Event-driven Architecture: Detailed event system for monitoring execution progress and handling various states.
- Flexible Execution Modes: Choose from different execution modes to optimize for your specific use case.
Installation
Install the package using npm:
npm install @saintno/comfyui-sdk
Or using bun:
bun add @saintno/comfyui-sdk
Core Concepts
- ComfyApi: The main client for interacting with a single ComfyUI instance.
- ComfyPool: A manager for multiple ComfyUI instances, providing load balancing.
- PromptBuilder: A utility for constructing workflows with type-safe inputs and outputs.
- CallWrapper: A wrapper for API calls that provides comprehensive event handling and execution control.
Basic Usage
Setting up a ComfyApi instance
import { ComfyApi } from "@saintno/comfyui-sdk";
const api = new ComfyApi("http://localhost:8188", "client-id");
api.on("log", (ev) => console.log(ev.detail)); // Debug logs
await api
.init(
1000 // Retry 1000 times before giving up, default 10 [optional]
1000 // Retry every 1000ms, default 1000ms [optional]
) // Initialize websocket
.waitForReady(); // Wait for the client to be ready
Creating a PromptBuilder
import { PromptBuilder } from "@saintno/comfyui-sdk";
import workflowJson from "./workflow.json"; // Get from `Save (API Format)` or `Export (API Format)` from ComfyUI Web
const promptBuilder = new PromptBuilder(
workflowJson,
["checkpoint", "positive", "negative", "seed", "steps"], // Input keys
["images"] // Output keys
)
.setInputNode("checkpoint", "4.inputs.ckpt_name")
.setInputNode("positive", "6.inputs.text")
.setInputNode("negative", "7.inputs.text")
.setInputNode("seed", "3.inputs.seed")
.setInputNode("steps", "3.inputs.steps")
.setInputNode("size", ["7.inputs.width", "7.inputs.height"]) // Bind multiple values to a single key
.setOutputNode("images", "9");
Executing a Workflow
import { CallWrapper } from "@saintno/comfyui-sdk";
const workflow = promptBuilder
.input(
"checkpoint",
"SDXL/realvisxlV40_v40LightningBakedvae.safetensors",
/**
* Use the client's osType to encode the path
*
* For example, if the client's `osType` is "nt" (Windows), the path should be encoded as below
* "SDXL\\realvisxlV40_v40LightningBakedvae.safetensors"
*/
api.osType // This is optional, but recommended it you want to support multiple platforms
)
.input("positive", "A beautiful landscape")
.input("negative", "blurry, text")
.input("seed", 42)
.input("steps", 20);
new CallWrapper(api, workflow)
.onStart((promptId) => console.log(`Task ${promptId} started`))
.onProgress((info, promptId) =>
console.log(`Task ${promptId} progress:`, info)
)
.onFinished((data, promptId) =>
console.log(`Task ${promptId} finished:`, data)
)
.run();
You can use api.getCheckpoints()
to get the list of available checkpoints.
const client = new ComfyApi("http://localhost:8188");
await client.getCheckpoints().then(console.log);
Advanced Usage
ComfyUI Manager
Support interact with ComfyUI-Manager extesion, require ComfyUI-Manager to be installed in the ComfyUI instance.
const api = new ComfyApi("http://localhost:8189").init();
/**
* Should wait for the client to be ready for checking supported extensions
*/
await api.waitForReady();
if (api.ext.manager.isSupported) {
/**
* Get the list of all extensions
*/
await api.ext.manager.getExtensionList().then(console.log);
//More methods are available, check the `api.ext.manager` reference for more details
}
ComfyUI Crystools
Support listen event from ComfyUI-Crystools extension for tracking system resources, require ComfyUI-Crystools to be installed in the ComfyUI instance.
const api = new ComfyApi("http://localhost:8189").init();
/**
* Should wait for the client to be ready for checking supported extensions
*/
await api.waitForReady();
if (api.ext.monitor.isSupported) {
/**
* Listen to the system monitor event
*/
api.ext.monitor.on("system_monitor", (ev) => {
console.log(ev.detail);
});
/**
* Current monitoring data
*/
console.log(api.ext.monitor.monitorData);
}
Connection Pooling
import { ComfyPool, EQueueMode } from "@saintno/comfyui-sdk";
const pool = new ComfyPool(
[
new ComfyApi("http://localhost:8188", "node-1"),
new ComfyApi("http://localhost:8189", "node-2"),
],
// "PICK_ZERO", Picks the client which has zero queue remaining. This is the default mode. (For who using along with ComfyUI web interface)
// "PICK_LOWEST", Picks the client which has the lowest queue remaining.
// "PICK_ROUTINE", Picks the client in a round-robin manner.
EQueueMode.PICK_ZERO
);
pool.run(async (api, clientIdx) => {
// Your workflow execution logic here
});
// Or execute multiple jobs in parallel
pool.batch([
(api) => executeWorkflow(api, params1),
(api) => executeWorkflow(api, params2),
// ...
]);
Authentication
const api = new ComfyApi("http://localhost:8188", "client-id", {
credentials: {
type: "basic",
username: "your-username",
password: "your-password",
},
});
API Reference
ComfyApi
constructor(host: string, clientId?: string, opts?: { credentials?: BasicCredentials })
queuePrompt(number: number, workflow: object): Promise<QueuePromptResponse | false>
getQueue(): Promise<QueueResponse>
getHistories(maxItems?: number): Promise<HistoryResponse>
getSystemStats(): Promise<SystemStatsResponse>
uploadImage(file: Buffer | Blob, fileName: string, config?: { override?: boolean, subfolder?: string }): Promise<{ info: ImageInfo; url: string } | false>
ComfyPool
constructor(clients: ComfyApi[], mode: EQueueMode = EQueueMode.PICK_ZERO)
run<T>(job: (client: ComfyApi, clientIdx?: number) => Promise<T>, weight?: number): Promise<T>
batch<T>(jobs: Array<(client: ComfyApi, clientIdx?: number) => Promise<T>>, weight?: number): Promise<T[]>
PromptBuilder
constructor(prompt: T, inputKeys: I[], outputKeys: O[])
setInputNode(input: I, key: DeepKeys<T>): this
setOutputNode(output: O, key: DeepKeys<T>): this
input<V = string | number | undefined>(key: I, value: V): PromptBuilder<I, O, object>
CallWrapper
constructor(client: ComfyApi, workflow: T)
onPreview(fn: (ev: Blob, promptId?: string) => void): this
onPending(fn: (promptId?: string) => void): this
onStart(fn: (promptId?: string) => void): this
onFinished(fn: (data: Record<keyof T["mapOutputKeys"], any>, promptId?: string) => void): this
onFailed(fn: (err: Error, promptId?: string) => void): this
onProgress(fn: (info: NodeProgress, promptId?: string) => void): this
run(): Promise<Record<keyof T["mapOutputKeys"], any> | undefined | false>
Configuration
The library supports various configuration options, including:
- Setting up multiple ComfyUI instances
- Configuring authentication credentials
- Choosing execution modes for the connection pool
Refer to the individual class constructors for specific configuration options.
Error Handling
The library provides comprehensive error handling through the event system. Use the onFailed
method of CallWrapper
to catch and handle errors during execution.
Best Practices
- Always use
PromptBuilder
to ensure type safety when constructing workflows. - Utilize
ComfyPool
for managing multiple ComfyUI instances to improve reliability and load distribution. - Implement proper error handling using the provided event callbacks.
- Use
batch
method ofComfyPool
for parallel execution of multiple workflows.
Contributing
Contributions are welcome! Please feel free to submit a Pull Request.
- Fork the repository
- Create your feature branch (
git checkout -b feature/AmazingFeature
) - Commit your changes (
git commit -m 'Add some AmazingFeature'
) - Push to the branch (
git push origin feature/AmazingFeature
) - Open a Pull Request
License
This project is licensed under the MIT License. See the LICENSE
file for details.
This README provides a comprehensive overview of the ComfyUI API Client library, including detailed usage examples, API references, and best practices. It should give users a solid understanding of how to use and configure the library for their needs.