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LibWebView+RequestServer: Add a simple test mode for the HTTP disk cache

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This mode allows us to test the HTTP disk cache with two mechanisms:

1. If RequestServer is launched with --http-disk-cache-mode=testing, it
   will cache requests with a X-Ladybird-Enable-Disk-Cache header.

2. In test mode, RS will include a X-Ladybird-Disk-Cache-Status response
   header indicating how the response was handled by the cache. There is
   no standard way for a web request to know what happened with respect
   to the disk cache, so this fills that hole for testing.

This mode is not exposed to users.
This commit is contained in:
Timothy Flynn 2025-11-18 10:18:40 -05:00 • committed by Jelle Raaijmakers
parent a853bb43ef
commit b2c112c41a
Notes: github-actions[bot] 2025-11-20 08:35:41 +00:00
11 changed files with 107 additions and 28 deletions
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12
Services/RequestServer/main.cpp
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@ -34,13 +34,13 @@ ErrorOr<int> ladybird_main(Main::Arguments arguments)
Vector<ByteString> certificates;
StringView mach_server_name;
bool enable_http_disk_cache = false;
StringView http_disk_cache_mode;
bool wait_for_debugger = false;
Core::ArgsParser args_parser;
args_parser.add_option(certificates, "Path to a certificate file", "certificate", 'C', "certificate");
args_parser.add_option(mach_server_name, "Mach server name", "mach-server-name", 0, "mach_server_name");
args_parser.add_option(enable_http_disk_cache, "Enable HTTP disk cache", "enable-http-disk-cache");
args_parser.add_option(http_disk_cache_mode, "HTTP disk cache mode", "http-disk-cache-mode", 0, "mode");
args_parser.add_option(wait_for_debugger, "Wait for debugger", "wait-for-debugger");
args_parser.parse(arguments);
@ -58,8 +58,12 @@ ErrorOr<int> ladybird_main(Main::Arguments arguments)
Core::Platform::register_with_mach_server(mach_server_name);
#endif
if (enable_http_disk_cache) {
if (auto cache = RequestServer::DiskCache::create(); cache.is_error())
if (http_disk_cache_mode.is_one_of("enabled"sv, "testing"sv)) {
auto mode = http_disk_cache_mode == "enabled"sv
? RequestServer::DiskCache::Mode::Normal
: RequestServer::DiskCache::Mode::Testing;
if (auto cache = RequestServer::DiskCache::create(mode); cache.is_error())
warnln("Unable to create disk cache: {}", cache.error());
else
RequestServer::g_disk_cache = cache.release_value();