.

node_modules/next/dist/esm/server/send-payload.js

@@ -0,0 +1,61 @@
+import { isResSent } from '../shared/lib/utils';
+import { generateETag } from './lib/etag';
+import fresh from 'next/dist/compiled/fresh';
+import { getCacheControlHeader } from './lib/cache-control';
+import { HTML_CONTENT_TYPE_HEADER } from '../lib/constants';
+export function sendEtagResponse(req, res, etag) {
+    if (etag) {
+        /**
+     * The server generating a 304 response MUST generate any of the
+     * following header fields that would have been sent in a 200 (OK)
+     * response to the same request: Cache-Control, Content-Location, Date,
+     * ETag, Expires, and Vary. https://tools.ietf.org/html/rfc7232#section-4.1
+     */ res.setHeader('ETag', etag);
+    }
+    if (fresh(req.headers, {
+        etag
+    })) {
+        res.statusCode = 304;
+        res.end();
+        return true;
+    }
+    return false;
+}
+export async function sendRenderResult({ req, res, result, generateEtags, poweredByHeader, cacheControl }) {
+    if (isResSent(res)) {
+        return;
+    }
+    if (poweredByHeader && result.contentType === HTML_CONTENT_TYPE_HEADER) {
+        res.setHeader('X-Powered-By', 'Next.js');
+    }
+    // If cache control is already set on the response we don't
+    // override it to allow users to customize it via next.config
+    if (cacheControl && !res.getHeader('Cache-Control')) {
+        res.setHeader('Cache-Control', getCacheControlHeader(cacheControl));
+    }
+    const payload = result.isDynamic ? null : result.toUnchunkedString();
+    if (generateEtags && payload !== null) {
+        const etag = generateETag(payload);
+        if (sendEtagResponse(req, res, etag)) {
+            return;
+        }
+    }
+    if (!res.getHeader('Content-Type') && result.contentType) {
+        res.setHeader('Content-Type', result.contentType);
+    }
+    if (payload) {
+        res.setHeader('Content-Length', Buffer.byteLength(payload));
+    }
+    if (req.method === 'HEAD') {
+        res.end(null);
+        return;
+    }
+    if (payload !== null) {
+        res.end(payload);
+        return;
+    }
+    // Pipe the render result to the response after we get a writer for it.
+    await result.pipeToNodeResponse(res);
+}
+
+//# sourceMappingURL=send-payload.js.map