n8n-nodes-comfyui
Version:
n8n node to integrate with ComfyUI stable diffusion workflows
221 lines • 9.73 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Comfyui = void 0;
const n8n_workflow_1 = require("n8n-workflow");
const jimp_1 = require("jimp");
class Comfyui {
constructor() {
this.description = {
displayName: 'ComfyUI',
name: 'comfyui',
icon: 'file:comfyui.svg',
group: ['transform'],
version: 1,
description: 'Execute ComfyUI workflows',
defaults: {
name: 'ComfyUI',
},
credentials: [
{
name: 'comfyUIApi',
required: true,
},
],
inputs: ['main'],
outputs: ['main'],
properties: [
{
displayName: 'Workflow JSON',
name: 'workflow',
type: 'string',
typeOptions: {
rows: 10,
},
default: '',
required: true,
description: 'The ComfyUI workflow in JSON format',
},
{
displayName: 'Output Format',
name: 'outputFormat',
type: 'options',
options: [
{
name: 'JPEG',
value: 'jpeg',
},
{
name: 'PNG',
value: 'png',
},
],
default: 'jpeg',
description: 'The format of the output images',
},
{
displayName: 'JPEG Quality',
name: 'jpegQuality',
type: 'number',
typeOptions: {
minValue: 1,
maxValue: 100
},
default: 80,
description: 'Quality of JPEG output (1-100)',
displayOptions: {
show: {
outputFormat: ['jpeg'],
},
},
},
{
displayName: 'Timeout',
name: 'timeout',
type: 'number',
default: 30,
description: 'Maximum time in minutes to wait for workflow completion',
},
],
};
}
async execute() {
var _a, _b;
const credentials = await this.getCredentials('comfyUIApi');
const workflow = this.getNodeParameter('workflow', 0);
const timeout = this.getNodeParameter('timeout', 0);
const outputFormat = this.getNodeParameter('outputFormat', 0);
let jpegQuality;
if (outputFormat === 'jpeg') {
jpegQuality = this.getNodeParameter('jpegQuality', 0);
}
const apiUrl = credentials.apiUrl;
const apiKey = credentials.apiKey;
console.log('[ComfyUI] Executing with API URL:', apiUrl);
const headers = {
'Content-Type': 'application/json',
};
if (apiKey) {
console.log('[ComfyUI] Using API key authentication');
headers['Authorization'] = `Bearer ${apiKey}`;
}
try {
console.log('[ComfyUI] Checking API connection...');
await this.helpers.request({
method: 'GET',
url: `${apiUrl}/system_stats`,
headers,
json: true,
});
console.log('[ComfyUI] Queueing prompt...');
const response = await this.helpers.request({
method: 'POST',
url: `${apiUrl}/prompt`,
headers,
body: {
prompt: JSON.parse(workflow),
},
json: true,
});
if (!response.prompt_id) {
throw new n8n_workflow_1.NodeApiError(this.getNode(), { message: 'Failed to get prompt ID from ComfyUI' });
}
const promptId = response.prompt_id;
console.log('[ComfyUI] Prompt queued with ID:', promptId);
let attempts = 0;
const maxAttempts = 60 * timeout;
await new Promise(resolve => setTimeout(resolve, 5000));
while (attempts < maxAttempts) {
console.log(`[ComfyUI] Checking execution status (attempt ${attempts + 1}/${maxAttempts})...`);
await new Promise(resolve => setTimeout(resolve, 1000));
attempts++;
const history = await this.helpers.request({
method: 'GET',
url: `${apiUrl}/history/${promptId}`,
headers,
json: true,
});
const promptResult = history[promptId];
if (!promptResult) {
console.log('[ComfyUI] Prompt not found in history');
continue;
}
if (promptResult.status === undefined) {
console.log('[ComfyUI] Execution status not found');
continue;
}
if ((_a = promptResult.status) === null || _a === void 0 ? void 0 : _a.completed) {
console.log('[ComfyUI] Execution completed');
if (((_b = promptResult.status) === null || _b === void 0 ? void 0 : _b.status_str) === 'error') {
throw new n8n_workflow_1.NodeApiError(this.getNode(), { message: '[ComfyUI] Workflow execution failed' });
}
if (!promptResult.outputs) {
throw new n8n_workflow_1.NodeApiError(this.getNode(), { message: '[ComfyUI] No outputs found in workflow result' });
}
const outputs = await Promise.all(Object.values(promptResult.outputs)
.flatMap((nodeOutput) => nodeOutput.images || [])
.filter((image) => image.type === 'output' || image.type === 'temp')
.map(async (file) => {
console.log(`[ComfyUI] Downloading ${file.type} image:`, file.filename);
let imageUrl = `${apiUrl}/view?filename=${file.filename}&subfolder=${file.subfolder || ''}&type=${file.type || ''}`;
try {
const imageData = await this.helpers.request({
method: 'GET',
url: imageUrl,
encoding: null,
headers,
});
const image = await jimp_1.Jimp.read(Buffer.from(imageData, 'base64'));
let outputBuffer;
if (outputFormat === 'jpeg') {
outputBuffer = await image.getBuffer("image/jpeg", { quality: jpegQuality });
}
else {
outputBuffer = await image.getBuffer(`image/png`);
}
const outputBase64 = outputBuffer.toString('base64');
const item = {
json: {
filename: file.filename,
type: file.type,
subfolder: file.subfolder || '',
data: outputBase64,
},
binary: {
data: {
fileName: file.filename,
data: outputBase64,
fileType: 'image',
fileSize: Math.round(outputBuffer.length / 1024 * 10) / 10 + " kB",
fileExtension: outputFormat,
mimeType: `image/${outputFormat}`,
}
}
};
return item;
}
catch (error) {
console.error(`[ComfyUI] Failed to download image ${file.filename}:`, error);
return {
json: {
filename: file.filename,
type: file.type,
subfolder: file.subfolder || '',
error: error.message,
},
};
}
}));
console.log('[ComfyUI] All images downloaded successfully');
return [outputs];
}
}
throw new n8n_workflow_1.NodeApiError(this.getNode(), { message: `Execution timeout after ${timeout} minutes` });
}
catch (error) {
console.error('[ComfyUI] Execution error:', error);
throw new n8n_workflow_1.NodeApiError(this.getNode(), { message: `ComfyUI API Error: ${error.message}` });
}
}
}
exports.Comfyui = Comfyui;
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