including-modules

2026-05-03 00:14:08 +02:00
parent ec83a0d879
commit 39a8a128be
20434 changed files with 3906546 additions and 3 deletions
@@ -0,0 +1,52 @@
+// In output: export mode, the build id is added to the start of the HTML
+// document, directly after the doctype declaration. During a prefetch, the
+// client performs a range request to get the build id, so it can check whether
+// the target page belongs to the same build.
+//
+// The first 64 bytes of the document are requested. The exact number isn't
+// too important; it must be larger than the build id + doctype + closing and
+// ending comment markers, but it doesn't need to match the end of the
+// comment exactly.
+//
+// Build ids are 21 bytes long in the default implementation, though this
+// can be overridden in the Next.js config. For the purposes of this check,
+// it's OK to only match the start of the id, so we'll truncate it if exceeds
+// a certain length.
+"use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "insertBuildIdComment", {
+    enumerable: true,
+    get: function() {
+        return insertBuildIdComment;
+    }
+});
+const DOCTYPE_PREFIX = '<!DOCTYPE html>' // 15 bytes
+;
+const MAX_BUILD_ID_LENGTH = 24;
+function escapeBuildId(buildId) {
+    // If the build id is longer than the given limit, it's OK for our purposes
+    // to only match the beginning.
+    const truncated = buildId.slice(0, MAX_BUILD_ID_LENGTH);
+    // Replace hyphens with underscores so it doesn't break the HTML comment.
+    // (Unlikely, but if this did happen it would break the whole document.)
+    return truncated.replace(/-/g, '_');
+}
+function insertBuildIdComment(originalHtml, buildId) {
+    if (// Skip if the build id contains a closing comment marker.
+    buildId.includes('-->') || // React always inserts a doctype at the start of the document. Skip if it
+    // isn't present. Shouldn't happen; suggests an issue elsewhere.
+    !originalHtml.startsWith(DOCTYPE_PREFIX)) {
+        // Return the original HTML unchanged. This means the document will not
+        // be prefetched.
+        // TODO: The build id comment is currently only used during prefetches, but
+        // if we eventually use this mechanism for regular navigations, we may need
+        // to error during build if we fail to insert it for some reason.
+        return originalHtml;
+    }
+    // The comment must be inserted after the doctype.
+    return originalHtml.replace(DOCTYPE_PREFIX, DOCTYPE_PREFIX + '<!--' + escapeBuildId(buildId) + '-->');
+}
+
+//# sourceMappingURL=output-export-prefetch-encoding.js.map