forked from withastro/astro
/
index.ts
312 lines (288 loc) · 8.69 KB
/
index.ts
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import type {
ComponentInstance,
EndpointHandler,
ManifestData,
MiddlewareResponseHandler,
RouteData,
SSRElement,
} from '../../@types/astro';
import type { RouteInfo, SSRManifest as Manifest } from './types';
import mime from 'mime';
import { attachToResponse, getSetCookiesFromResponse } from '../cookies/index.js';
import { callEndpoint, createAPIContext } from '../endpoint/index.js';
import { consoleLogDestination } from '../logger/console.js';
import { error, type LogOptions } from '../logger/core.js';
import { callMiddleware } from '../middleware/callMiddleware.js';
import { prependForwardSlash, removeTrailingForwardSlash } from '../path.js';
import {
createEnvironment,
createRenderContext,
renderPage,
type Environment,
} from '../render/index.js';
import { RouteCache } from '../render/route-cache.js';
import {
createAssetLink,
createModuleScriptElement,
createStylesheetElementSet,
} from '../render/ssr-element.js';
import { matchRoute } from '../routing/match.js';
export { deserializeManifest } from './common.js';
const clientLocalsSymbol = Symbol.for('astro.locals');
export const pagesVirtualModuleId = '@astrojs-pages-virtual-entry';
export const resolvedPagesVirtualModuleId = '\0' + pagesVirtualModuleId;
const responseSentSymbol = Symbol.for('astro.responseSent');
export interface MatchOptions {
matchNotFound?: boolean | undefined;
}
export class App {
#env: Environment;
#manifest: Manifest;
#manifestData: ManifestData;
#routeDataToRouteInfo: Map<RouteData, RouteInfo>;
#encoder = new TextEncoder();
#logging: LogOptions = {
dest: consoleLogDestination,
level: 'info',
};
#base: string;
#baseWithoutTrailingSlash: string;
constructor(manifest: Manifest, streaming = true) {
this.#manifest = manifest;
this.#manifestData = {
routes: manifest.routes.map((route) => route.routeData),
};
this.#routeDataToRouteInfo = new Map(manifest.routes.map((route) => [route.routeData, route]));
this.#env = createEnvironment({
adapterName: manifest.adapterName,
logging: this.#logging,
markdown: manifest.markdown,
mode: 'production',
renderers: manifest.renderers,
clientDirectives: manifest.clientDirectives,
async resolve(specifier: string) {
if (!(specifier in manifest.entryModules)) {
throw new Error(`Unable to resolve [${specifier}]`);
}
const bundlePath = manifest.entryModules[specifier];
switch (true) {
case bundlePath.startsWith('data:'):
case bundlePath.length === 0: {
return bundlePath;
}
default: {
return createAssetLink(bundlePath, manifest.base, manifest.assetsPrefix);
}
}
},
routeCache: new RouteCache(this.#logging),
site: this.#manifest.site,
ssr: true,
streaming,
});
this.#base = this.#manifest.base || '/';
this.#baseWithoutTrailingSlash = removeTrailingForwardSlash(this.#base);
}
removeBase(pathname: string) {
if (pathname.startsWith(this.#base)) {
return pathname.slice(this.#baseWithoutTrailingSlash.length + 1);
}
return pathname;
}
match(request: Request, { matchNotFound = false }: MatchOptions = {}): RouteData | undefined {
const url = new URL(request.url);
// ignore requests matching public assets
if (this.#manifest.assets.has(url.pathname)) {
return undefined;
}
let pathname = prependForwardSlash(this.removeBase(url.pathname));
let routeData = matchRoute(pathname, this.#manifestData);
if (routeData) {
if (routeData.prerender) return undefined;
return routeData;
} else if (matchNotFound) {
const notFoundRouteData = matchRoute('/404', this.#manifestData);
if (notFoundRouteData?.prerender) return undefined;
return notFoundRouteData;
} else {
return undefined;
}
}
async render(request: Request, routeData?: RouteData): Promise<Response> {
let defaultStatus = 200;
if (!routeData) {
routeData = this.match(request);
if (!routeData) {
defaultStatus = 404;
routeData = this.match(request, { matchNotFound: true });
}
if (!routeData) {
return new Response(null, {
status: 404,
statusText: 'Not found',
});
}
}
Reflect.set(request, clientLocalsSymbol, {});
// Use the 404 status code for 404.astro components
if (routeData.route === '/404') {
defaultStatus = 404;
}
let mod = await this.#manifest.pageMap.get(routeData.component)!();
if (routeData.type === 'page') {
let response = await this.#renderPage(request, routeData, mod, defaultStatus);
// If there was a known error code, try sending the according page (e.g. 404.astro / 500.astro).
if (response.status === 500 || response.status === 404) {
const errorPageData = matchRoute('/' + response.status, this.#manifestData);
if (errorPageData && errorPageData.route !== routeData.route) {
mod = await this.#manifest.pageMap.get(errorPageData.component)!();
try {
let errorResponse = await this.#renderPage(
request,
errorPageData,
mod,
response.status
);
return errorResponse;
} catch {}
}
}
return response;
} else if (routeData.type === 'endpoint') {
return this.#callEndpoint(request, routeData, mod, defaultStatus);
} else {
throw new Error(`Unsupported route type [${routeData.type}].`);
}
}
setCookieHeaders(response: Response) {
return getSetCookiesFromResponse(response);
}
async #renderPage(
request: Request,
routeData: RouteData,
mod: ComponentInstance,
status = 200
): Promise<Response> {
const url = new URL(request.url);
const pathname = prependForwardSlash(this.removeBase(url.pathname));
const info = this.#routeDataToRouteInfo.get(routeData!)!;
// may be used in the future for handling rel=modulepreload, rel=icon, rel=manifest etc.
const links = new Set<never>();
const styles = createStylesheetElementSet(info.styles);
let scripts = new Set<SSRElement>();
for (const script of info.scripts) {
if ('stage' in script) {
if (script.stage === 'head-inline') {
scripts.add({
props: {},
children: script.children,
});
}
} else {
scripts.add(createModuleScriptElement(script));
}
}
try {
const renderContext = await createRenderContext({
request,
origin: url.origin,
pathname,
componentMetadata: this.#manifest.componentMetadata,
scripts,
styles,
links,
route: routeData,
status,
mod: mod as any,
env: this.#env,
});
const apiContext = createAPIContext({
request: renderContext.request,
params: renderContext.params,
props: renderContext.props,
site: this.#env.site,
adapterName: this.#env.adapterName,
});
const onRequest = this.#manifest.middleware?.onRequest;
let response;
if (onRequest) {
response = await callMiddleware<Response>(
this.#env.logging,
onRequest as MiddlewareResponseHandler,
apiContext,
() => {
return renderPage({ mod, renderContext, env: this.#env, apiContext });
}
);
} else {
response = await renderPage({
mod,
renderContext,
env: this.#env,
apiContext,
});
}
Reflect.set(request, responseSentSymbol, true);
return response;
} catch (err: any) {
error(this.#logging, 'ssr', err.stack || err.message || String(err));
return new Response(null, {
status: 500,
statusText: 'Internal server error',
});
}
}
async #callEndpoint(
request: Request,
routeData: RouteData,
mod: ComponentInstance,
status = 200
): Promise<Response> {
const url = new URL(request.url);
const pathname = '/' + this.removeBase(url.pathname);
const handler = mod as unknown as EndpointHandler;
const ctx = await createRenderContext({
request,
origin: url.origin,
pathname,
route: routeData,
status,
env: this.#env,
mod: handler as any,
});
const result = await callEndpoint(
handler,
this.#env,
ctx,
this.#logging,
this.#manifest.middleware
);
if (result.type === 'response') {
if (result.response.headers.get('X-Astro-Response') === 'Not-Found') {
const fourOhFourRequest = new Request(new URL('/404', request.url));
const fourOhFourRouteData = this.match(fourOhFourRequest);
if (fourOhFourRouteData) {
return this.render(fourOhFourRequest, fourOhFourRouteData);
}
}
return result.response;
} else {
const body = result.body;
const headers = new Headers();
const mimeType = mime.getType(url.pathname);
if (mimeType) {
headers.set('Content-Type', `${mimeType};charset=utf-8`);
} else {
headers.set('Content-Type', 'text/plain;charset=utf-8');
}
const bytes = this.#encoder.encode(body);
headers.set('Content-Length', bytes.byteLength.toString());
const response = new Response(bytes, {
status: 200,
headers,
});
attachToResponse(response, result.cookies);
return response;
}
}
}