@ai-sdk/google-vertex
Version:
The **[Google Vertex provider](https://ai-sdk.dev/providers/ai-sdk-providers/google-vertex)** for the [AI SDK](https://ai-sdk.dev/docs) contains language model support for the [Google Vertex AI](https://cloud.google.com/vertex-ai) APIs.
198 lines (193 loc) • 6.36 kB
JavaScript
// src/maas/edge/google-vertex-maas-provider-edge.ts
import { resolve } from "@ai-sdk/provider-utils";
// src/edge/google-vertex-auth-edge.ts
import {
loadOptionalSetting,
loadSetting,
withUserAgentSuffix,
getRuntimeEnvironmentUserAgent
} from "@ai-sdk/provider-utils";
// src/version.ts
var VERSION = true ? "4.0.137" : "0.0.0-test";
// src/edge/google-vertex-auth-edge.ts
var loadCredentials = async () => {
try {
return {
clientEmail: loadSetting({
settingValue: void 0,
settingName: "clientEmail",
environmentVariableName: "GOOGLE_CLIENT_EMAIL",
description: "Google client email"
}),
privateKey: loadSetting({
settingValue: void 0,
settingName: "privateKey",
environmentVariableName: "GOOGLE_PRIVATE_KEY",
description: "Google private key"
}),
privateKeyId: loadOptionalSetting({
settingValue: void 0,
environmentVariableName: "GOOGLE_PRIVATE_KEY_ID"
})
};
} catch (error) {
throw new Error(`Failed to load Google credentials: ${error.message}`);
}
};
var base64url = (str) => {
return btoa(str).replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "");
};
var importPrivateKey = async (pemKey) => {
const pemHeader = "-----BEGIN PRIVATE KEY-----";
const pemFooter = "-----END PRIVATE KEY-----";
const pemContents = pemKey.replace(pemHeader, "").replace(pemFooter, "").replace(/\s/g, "");
const binaryString = atob(pemContents);
const binaryData = new Uint8Array(binaryString.length);
for (let i = 0; i < binaryString.length; i++) {
binaryData[i] = binaryString.charCodeAt(i);
}
return await crypto.subtle.importKey(
"pkcs8",
binaryData,
{ name: "RSASSA-PKCS1-v1_5", hash: "SHA-256" },
true,
["sign"]
);
};
var buildJwt = async (credentials) => {
const now = Math.floor(Date.now() / 1e3);
const header = {
alg: "RS256",
typ: "JWT"
};
if (credentials.privateKeyId) {
header.kid = credentials.privateKeyId;
}
const payload = {
iss: credentials.clientEmail,
scope: "https://www.googleapis.com/auth/cloud-platform",
aud: "https://oauth2.googleapis.com/token",
exp: now + 3600,
iat: now
};
const privateKey = await importPrivateKey(credentials.privateKey);
const signingInput = `${base64url(JSON.stringify(header))}.${base64url(
JSON.stringify(payload)
)}`;
const encoder = new TextEncoder();
const data = encoder.encode(signingInput);
const signature = await crypto.subtle.sign(
"RSASSA-PKCS1-v1_5",
privateKey,
data
);
const signatureBase64 = base64url(
String.fromCharCode(...new Uint8Array(signature))
);
return `${base64url(JSON.stringify(header))}.${base64url(
JSON.stringify(payload)
)}.${signatureBase64}`;
};
async function generateAuthToken(credentials) {
try {
const creds = credentials || await loadCredentials();
const jwt = await buildJwt(creds);
const response = await fetch("https://oauth2.googleapis.com/token", {
method: "POST",
headers: withUserAgentSuffix(
{ "Content-Type": "application/x-www-form-urlencoded" },
`ai-sdk/google-vertex/${VERSION}`,
getRuntimeEnvironmentUserAgent()
),
body: new URLSearchParams({
grant_type: "urn:ietf:params:oauth:grant-type:jwt-bearer",
assertion: jwt
})
});
if (!response.ok) {
throw new Error(`Token request failed: ${response.statusText}`);
}
const data = await response.json();
return data.access_token;
} catch (error) {
throw error;
}
}
// src/maas/google-vertex-maas-provider.ts
import {
createOpenAICompatible
} from "@ai-sdk/openai-compatible";
import {
loadOptionalSetting as loadOptionalSetting2,
loadSetting as loadSetting2,
withoutTrailingSlash
} from "@ai-sdk/provider-utils";
function createVertexMaas(options = {}) {
const loadLocation = () => loadOptionalSetting2({
settingValue: options.location,
environmentVariableName: "GOOGLE_VERTEX_LOCATION"
});
const loadProject = () => loadSetting2({
settingValue: options.project,
settingName: "project",
environmentVariableName: "GOOGLE_VERTEX_PROJECT",
description: "Google Vertex project"
});
const constructBaseURL = () => {
var _a;
const projectId = loadProject();
const location = (_a = loadLocation()) != null ? _a : "global";
return `https://aiplatform.googleapis.com/v1/projects/${projectId}/locations/${location}/endpoints/openapi`;
};
const loadBaseURL = () => {
var _a;
return withoutTrailingSlash((_a = options.baseURL) != null ? _a : "") || constructBaseURL();
};
let cachedProvider;
const getProvider = () => cachedProvider != null ? cachedProvider : cachedProvider = createOpenAICompatible({
name: "vertex.maas",
baseURL: loadBaseURL(),
fetch: options.fetch
});
const provider = (modelId) => getProvider()(modelId);
provider.specificationVersion = "v3";
provider.languageModel = (modelId) => getProvider().languageModel(modelId);
provider.chatModel = (modelId) => getProvider().chatModel(modelId);
provider.completionModel = (modelId) => getProvider().completionModel(modelId);
provider.embeddingModel = (modelId) => getProvider().embeddingModel(modelId);
provider.textEmbeddingModel = (modelId) => getProvider().textEmbeddingModel(modelId);
provider.imageModel = (modelId) => getProvider().imageModel(modelId);
return provider;
}
// src/maas/edge/google-vertex-maas-provider-edge.ts
function createVertexMaas2(options = {}) {
const customFetch = async (url, init) => {
var _a;
const token = await generateAuthToken(options.googleCredentials);
const resolvedHeaders = await resolve(options.headers);
const authHeaders = {
...resolvedHeaders,
Authorization: `Bearer ${token}`
};
const fetchInit = {
...init,
headers: {
...init == null ? void 0 : init.headers,
...authHeaders
}
};
return ((_a = options.fetch) != null ? _a : fetch)(url, fetchInit);
};
return createVertexMaas({
...options,
fetch: customFetch,
headers: void 0
// Don't pass headers, we handle them in fetch
});
}
var vertexMaas = createVertexMaas2();
export {
createVertexMaas2 as createVertexMaas,
vertexMaas
};
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