24 lines
978 B
TypeScript
24 lines
978 B
TypeScript
import type {ProviderDefinition, ProviderSecret} from "./provider-types";
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export function createBrowserProviderFetch(provider: ProviderDefinition, secret: ProviderSecret) {
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const proxy = provider.connection.proxy;
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if (!proxy) return fetch;
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if (proxy.type !== "relay") throw new Error(`Unsupported frontend proxy: ${proxy.type}`);
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return async (input: RequestInfo | URL, init: RequestInit = {}) => {
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const headers = new Headers(init.headers);
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const relayHeaders: Record<string, string> = {"Content-Type": "application/json"};
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if (secret.proxy?.token) relayHeaders.Authorization = `Bearer ${secret.proxy.token}`;
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return fetch(proxy.url, {
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method: "POST",
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headers: relayHeaders,
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body: JSON.stringify({
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url: String(input),
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method: init.method || "GET",
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headers: Object.fromEntries(headers.entries()),
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body: typeof init.body === "string" ? init.body : null
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}),
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signal: init.signal
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});
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};
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}
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