Lumpiasty/llama.cpp
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server : serve index.html with no-cache (#27006)

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index.html was served with `max-age=31536000, immutable` like the hashed assets, but its name is stable while its contents change every build, so a cached copy pins the UI to an old build. It now revalidates via its existing ETag, which keeps the 304 for unchanged builds.
This commit is contained in:
Emanuil Rusev
2026-08-13 16:59:45 +02:00
committed by GitHub
parent 1d2869c6e5
commit 981184e49a
1 changed files with 14 additions and 7 deletions
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tools/server/server-http.cpp
+14 -7
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@@ -355,8 +355,15 @@ bool server_http_context::init(const common_params & params) {
return true;
};
auto serve_asset_cached = [](const std::string & name, bool isolation) {
return [name, isolation](const httplib::Request & req, httplib::Response & res) {
// Hashed assets never change under a given name, so they can be cached forever.
// `index.html` is the exception: its name is stable while its contents change on
// every build, and it is what names the hashed asset versions the UI loads.
static constexpr auto cache_immutable = "public, max-age=31536000, immutable";
static constexpr auto cache_revalidate = "no-cache";
// Serves an asset with ETag/304 handling, under the given caching policy.
auto serve_asset_cached = [](const std::string & name, bool isolation, const char * cache_control) {
return [name, isolation, cache_control](const httplib::Request & req, httplib::Response & res) {
if (!handle_gzip_header(req, res)) {
return true; // returns error message
}
@@ -372,7 +379,7 @@ bool server_http_context::init(const common_params & params) {
res.set_header("Cross-Origin-Embedder-Policy", "require-corp");
res.set_header("Cross-Origin-Opener-Policy", "same-origin");
}
res.set_header("Cache-Control", "public, max-age=31536000, immutable");
res.set_header("Cache-Control", cache_control);
res.set_content(reinterpret_cast<const char*>(a->data), a->size, a->type.c_str());
return false;
};
@@ -394,9 +401,9 @@ bool server_http_context::init(const common_params & params) {
};
};
// main index file
srv->Get(params.api_prefix + "/", serve_asset_cached("index.html", true));
srv->Get(params.api_prefix + "/index.html", serve_asset_cached("index.html", true));
// main index file -- revalidated, so a new build is picked up on the next load
srv->Get(params.api_prefix + "/", serve_asset_cached("index.html", true, cache_revalidate));
srv->Get(params.api_prefix + "/index.html", serve_asset_cached("index.html", true, cache_revalidate));
// All remaining assets registered directly from the embedded asset table.
// PWA revalidation files (sw.js, manifest, version.json) use no-cache;
@@ -414,7 +421,7 @@ bool server_http_context::init(const common_params & params) {
SRV_DBG("serve nocache for %s\n", a.name.c_str());
srv->Get(params.api_prefix + "/" + a.name, serve_asset_nocache(a.name));
} else {
srv->Get(params.api_prefix + "/" + a.name, serve_asset_cached(a.name, false));
srv->Get(params.api_prefix + "/" + a.name, serve_asset_cached(a.name, false, cache_immutable));
}
}