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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_URLQueryStringStripper_h
#define mozilla_URLQueryStringStripper_h
#include "nsIURLQueryStrippingListService.h"
#include "nsStringFwd.h"
#include "nsTHashSet.h"
class nsIURI;
namespace mozilla {
// URLQueryStringStripper is responsible for stripping certain part of the query
// string of the given URI to address the bounce(redirect) tracking issues. It
// will strip every query parameter which matches the strip list defined in
// the pref 'privacy.query_stripping.strip_list'. Note that It's different from
// URLDecorationStripper which strips the entire query string from the referrer
// if there is a tracking query parameter present in the URI.
//
// TODO: Given that URLQueryStringStripper and URLDecorationStripper are doing
// similar things. We could somehow combine these two modules into one.
// We will improve this in the future.
class URLQueryStringStripper final : public nsIURLQueryStrippingListObserver {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIURLQUERYSTRIPPINGLISTOBSERVER
// Strip the query parameters that are in the strip list. Return the amount of
// query parameters that have been stripped. Returns 0 if no query parameters
// have been stripped or the feature is disabled.
static uint32_t Strip(nsIURI* aURI, bool aIsPBM, nsCOMPtr<nsIURI>& aOutput);
private:
URLQueryStringStripper() = default;
~URLQueryStringStripper() = default;
static URLQueryStringStripper* GetOrCreate();
void Init();
void Shutdown();
uint32_t StripQueryString(nsIURI* aURI, nsCOMPtr<nsIURI>& aOutput);
bool CheckAllowList(nsIURI* aURI);
void PopulateStripList(const nsAString& aList);
void PopulateAllowList(const nsACString& aList);
nsTHashSet<nsString> mList;
nsTHashSet<nsCString> mAllowList;
nsCOMPtr<nsIURLQueryStrippingListService> mService;
};
} // namespace mozilla
#endif // mozilla_URLQueryStringStripper_h
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