add bedrock embeddings

2026-06-28 19:00:59 +03:00 · 2023-10-11 14:08:04 +01:00
parent 4a09185195
commit 536ed07f9d
5 changed files with 167 additions and 33 deletions
@@ -0,0 +1,152 @@
+import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
+import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
+import { BedrockEmbeddings, BedrockEmbeddingsParams } from 'langchain/embeddings/bedrock'
+import { BedrockRuntimeClient, InvokeModelCommand } from '@aws-sdk/client-bedrock-runtime'
+
+class AWSBedrockEmbedding_Embeddings implements INode {
+    label: string
+    name: string
+    version: number
+    type: string
+    icon: string
+    category: string
+    description: string
+    baseClasses: string[]
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'AWS Bedrock Embeddings'
+        this.name = 'AWSBedrockEmbeddings'
+        this.version = 1.0
+        this.type = 'AWSBedrockEmbeddings'
+        this.icon = 'awsBedrock.png'
+        this.category = 'Embeddings'
+        this.description = 'AWSBedrock embedding models to generate embeddings for a given text'
+        this.baseClasses = [this.type, ...getBaseClasses(BedrockEmbeddings)]
+        this.credential = {
+            label: 'AWS Credential',
+            name: 'credential',
+            type: 'credential',
+            credentialNames: ['awsApi'],
+            optional: true
+        }
+        this.inputs = [
+            {
+                label: 'Region',
+                name: 'region',
+                type: 'options',
+                options: [
+                    { label: 'af-south-1', name: 'af-south-1' },
+                    { label: 'ap-east-1', name: 'ap-east-1' },
+                    { label: 'ap-northeast-1', name: 'ap-northeast-1' },
+                    { label: 'ap-northeast-2', name: 'ap-northeast-2' },
+                    { label: 'ap-northeast-3', name: 'ap-northeast-3' },
+                    { label: 'ap-south-1', name: 'ap-south-1' },
+                    { label: 'ap-south-2', name: 'ap-south-2' },
+                    { label: 'ap-southeast-1', name: 'ap-southeast-1' },
+                    { label: 'ap-southeast-2', name: 'ap-southeast-2' },
+                    { label: 'ap-southeast-3', name: 'ap-southeast-3' },
+                    { label: 'ap-southeast-4', name: 'ap-southeast-4' },
+                    { label: 'ap-southeast-5', name: 'ap-southeast-5' },
+                    { label: 'ap-southeast-6', name: 'ap-southeast-6' },
+                    { label: 'ca-central-1', name: 'ca-central-1' },
+                    { label: 'ca-west-1', name: 'ca-west-1' },
+                    { label: 'cn-north-1', name: 'cn-north-1' },
+                    { label: 'cn-northwest-1', name: 'cn-northwest-1' },
+                    { label: 'eu-central-1', name: 'eu-central-1' },
+                    { label: 'eu-central-2', name: 'eu-central-2' },
+                    { label: 'eu-north-1', name: 'eu-north-1' },
+                    { label: 'eu-south-1', name: 'eu-south-1' },
+                    { label: 'eu-south-2', name: 'eu-south-2' },
+                    { label: 'eu-west-1', name: 'eu-west-1' },
+                    { label: 'eu-west-2', name: 'eu-west-2' },
+                    { label: 'eu-west-3', name: 'eu-west-3' },
+                    { label: 'il-central-1', name: 'il-central-1' },
+                    { label: 'me-central-1', name: 'me-central-1' },
+                    { label: 'me-south-1', name: 'me-south-1' },
+                    { label: 'sa-east-1', name: 'sa-east-1' },
+                    { label: 'us-east-1', name: 'us-east-1' },
+                    { label: 'us-east-2', name: 'us-east-2' },
+                    { label: 'us-gov-east-1', name: 'us-gov-east-1' },
+                    { label: 'us-gov-west-1', name: 'us-gov-west-1' },
+                    { label: 'us-west-1', name: 'us-west-1' },
+                    { label: 'us-west-2', name: 'us-west-2' }
+                ],
+                default: 'us-east-1'
+            },
+            {
+                label: 'Model Name',
+                name: 'model',
+                type: 'options',
+                options: [{ label: 'amazon.titan-embed-text-v1', name: 'amazon.titan-embed-text-v1' }],
+                default: 'amazon.titan-embed-text-v1'
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
+        const iRegion = nodeData.inputs?.region as string
+        const iModel = nodeData.inputs?.model as string
+
+        const obj: BedrockEmbeddingsParams = {
+            model: iModel,
+            region: iRegion
+        }
+
+        const credentialData = await getCredentialData(nodeData.credential ?? '', options)
+        if (credentialData && Object.keys(credentialData).length !== 0) {
+            const credentialApiKey = getCredentialParam('awsKey', credentialData, nodeData)
+            const credentialApiSecret = getCredentialParam('awsSecret', credentialData, nodeData)
+            const credentialApiSession = getCredentialParam('awsSession', credentialData, nodeData)
+
+            obj.credentials = {
+                accessKeyId: credentialApiKey,
+                secretAccessKey: credentialApiSecret,
+                sessionToken: credentialApiSession
+            }
+        }
+
+        const client = new BedrockRuntimeClient({
+            region: obj.region,
+            credentials: obj.credentials
+        })
+
+        const model = new BedrockEmbeddings(obj)
+
+        // Avoid Illegal Invocation
+        model.embedQuery = async (document: string): Promise<number[]> => {
+            return await embedText(document, client, iModel)
+        }
+
+        model.embedDocuments = async (documents: string[]): Promise<number[][]> => {
+            return Promise.all(documents.map((document) => embedText(document, client, iModel)))
+        }
+        return model
+    }
+}
+
+const embedText = async (text: string, client: BedrockRuntimeClient, model: string): Promise<number[]> => {
+    // replace newlines, which can negatively affect performance.
+    const cleanedText = text.replace(/\n/g, ' ')
+
+    const res = await client.send(
+        new InvokeModelCommand({
+            modelId: model,
+            body: JSON.stringify({
+                inputText: cleanedText
+            }),
+            contentType: 'application/json',
+            accept: 'application/json'
+        })
+    )
+
+    try {
+        const body = new TextDecoder().decode(res.body)
+        return JSON.parse(body).embedding
+    } catch (e) {
+        throw new Error('An invalid response was returned by Bedrock.')
+    }
+}
+
+module.exports = { nodeClass: AWSBedrockEmbedding_Embeddings }