114 lines
3.4 KiB
TypeScript
114 lines
3.4 KiB
TypeScript
import type { Client } from "../../client.ts";
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import type {
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ProxyFetchRequest,
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ProxyFetchResponse,
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} from "../../plugos/proxy_fetch.ts";
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import { fsEndpoint } from "../../spaces/constants.ts";
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import { LuaNativeJSFunction, LuaTable } from "../runtime.ts";
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export const netApi = new LuaTable({
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proxyFetch: new LuaNativeJSFunction(
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async (
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url: string,
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options: ProxyFetchRequest = {},
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): Promise<ProxyFetchResponse> => {
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// JSONify any non-serializable body
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if (
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options?.body && typeof options.body !== "string" &&
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!(options.body instanceof Uint8Array)
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) {
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options.body = JSON.stringify(options.body);
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}
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const fetchOptions = options
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? {
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method: options.method,
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headers: {} as Record<string, string>,
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body: options.body,
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}
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: {};
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fetchOptions.headers = buildProxyHeaders(options.headers);
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const resp = await client.httpSpacePrimitives.authenticatedFetch(
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buildProxyUrl(client, url),
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fetchOptions,
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);
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if (resp.status !== 200) {
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return {
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ok: false,
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status: resp.status,
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headers: extractProxyHeaders(resp.headers),
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body: await resp.text(),
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};
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}
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// Do sensible things with the body based on the content type
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let body: any;
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const contentTypeHeader = options.responseEncoding ||
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resp.headers.get("x-proxy-header-content-type");
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const statusCode = +(resp.headers.get("x-proxy-status-code") || "200");
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if (contentTypeHeader?.startsWith("application/json")) {
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body = await resp.json();
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} else if (
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contentTypeHeader?.startsWith("application/xml") ||
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contentTypeHeader?.startsWith("text/")
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) {
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body = await resp.text();
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} else {
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body = new Uint8Array(await resp.arrayBuffer());
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}
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return {
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ok: resp.ok,
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status: statusCode,
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headers: extractProxyHeaders(resp.headers),
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body: body,
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};
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},
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),
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readURI: new LuaNativeJSFunction(
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(uri: string, options: { uri?: string; encoding?: string } = {}) => {
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options.uri = uri;
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return client.clientSystem.serviceRegistry.invokeBestMatch(
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"net.readURI:" + uri,
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options,
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);
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},
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),
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writeURI: new LuaNativeJSFunction(
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(uri: string, content: string | Uint8Array) => {
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return client.clientSystem.serviceRegistry.invokeBestMatch(
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"net.writeURI:" + uri,
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{ uri, content },
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);
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},
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),
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});
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// Utility functions
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function buildProxyUrl(client: Client, url: string) {
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url = url.replace(/^https?:\/\//, "");
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// Strip off the /.fs and replace with /.proxy
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return client.httpSpacePrimitives.url.slice(0, -fsEndpoint.length) +
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"/.proxy/" + url;
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}
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function buildProxyHeaders(headers?: Record<string, any>): Record<string, any> {
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const newHeaders: Record<string, any> = { "X-Proxy-Request": "true" };
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if (!headers) {
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return newHeaders;
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}
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for (const [key, value] of Object.entries(headers)) {
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newHeaders[`X-Proxy-Header-${key}`] = value;
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}
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return newHeaders;
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}
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function extractProxyHeaders(
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headers: Headers,
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): Record<string, any> {
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const newHeaders: Record<string, any> = {};
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for (const [key, value] of headers.entries()) {
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if (key.toLowerCase().startsWith("x-proxy-header-")) {
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newHeaders[key.slice("x-proxy-header-".length)] = value;
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}
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}
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return newHeaders;
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}
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