Jint

Network and storage ​

Each BrowserContext is a network and storage partition. Configure it when creating the context:

csharp
var context = await browser.NewContextAsync(new BrowserContextOptions
{
    HttpClient = client,
    UrlFilter = uri => uri.Host.EndsWith(".example.org", StringComparison.Ordinal),
    BlockPrivateNetwork = true,
});

If you supply an HttpClientHandler, disable automatic redirects. Jint follows redirects itself so the URL filter and security rules are checked on every hop.

The context's cookie jar is shared by requests and document.cookie. Its storage partition keeps one localStorage store per origin. A page owns its own sessionStorage.

csharp
var jar = context.CookieJar;
var storage = context.StoragePartition;

HTTP caching ​

HTTP response caching is disabled by default. Enable a bounded private cache with options.HttpCache.Storage = BrowserHttpCacheStorage.Memory before creating the context. Disk mode also requires an explicit directory and visitor partition identity, or explicitly requested temporary storage. Pages and workers in that context share the cache. context.ClearHttpCache() clears it.

See HTTP caching for freshness, validation, request cache modes, credential partitioning, disk ownership and DevTools controls. This cache is separate from script-visible CacheStorage and its quotas.

Request log ​

Page.Requests is a bounded, page-lifetime summary of document, script, subresource, fetch, and XMLHttpRequest activity:

csharp
foreach (var request in page.Requests)
{
    Console.WriteLine($"{request.Method} {request.Url} {request.Status}");
}

Entries include initiator, final-hop URL and method, status, response headers, redirect count, body length, and failure details. Bodies and request headers are not retained. A request in flight has status 0.

FromCache, Revalidated and TransferredBodyLength distinguish locally reused bodies from network traffic. A validated response delivers the retained body while transferring zero body bytes.

References intentionally not fetched, such as a media element or a non-stylesheet <link>, still appear with NotFetchedReason. The log spans navigations and is bounded by BrowserOptions.MaxRecordedEvents.

Use UrlFilter for an application allow-list. BlockPrivateNetwork is a coarse additional defense; see Untrusted content.