mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-11 16:32:59 +00:00
3b8a3fad8f
Our data indicates a few users of x86 system hit failure to load urlmon.dll for unknown reasons. Since we don't always require urlmon.dll, we delay-load it, which causes a crash if loading urlmon.dll fails. A proposed fix is to dynamically load urlmon.dll on x86. Differential Revision: https://phabricator.services.mozilla.com/D88534
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/* -*- 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 https://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_UrlmonHeaderOnlyUtils_h
|
|
#define mozilla_UrlmonHeaderOnlyUtils_h
|
|
|
|
#include "mozilla/ShellHeaderOnlyUtils.h"
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* We used to validate a uri with SHParseDisplayName to mitigate the Windows
|
|
* bug (Bug 394974). However, Bug 1573051 revealed an issue that a fragment,
|
|
* a string following a hash mark (#), is dropped when we extract a string
|
|
* from PIDL. This is the intended behavior of Windows.
|
|
*
|
|
* To deal with the fragment issue as well as keeping our mitigation, we
|
|
* decided to use CreateUri to validate a uri string, but we also keep using
|
|
* SHParseDisplayName as a pre-check. This is because there are several
|
|
* cases where CreateUri succeeds while SHParseDisplayName fails such as
|
|
* a non-existent file: uri.
|
|
*
|
|
* To minimize the impact of introducing CreateUri into the validation logic,
|
|
* we try to mimic the logic of windows_storage!IUriToPidl (ieframe!IUriToPidl
|
|
* in Win7) which is executed behind SHParseDisplayName.
|
|
* What IUriToPidl does is:
|
|
* 1) If a given uri has a fragment, removes a fragment.
|
|
* 2) Takes an absolute uri if it's available in the given uri, otherwise
|
|
* takes a raw uri.
|
|
*
|
|
* As we need to get a full uri including a fragment, this function does 2).
|
|
*/
|
|
inline LauncherResult<_bstr_t> UrlmonValidateUri(const wchar_t* aUri) {
|
|
LauncherResult<UniqueAbsolutePidl> pidlResult = ShellParseDisplayName(aUri);
|
|
if (pidlResult.isErr()) {
|
|
return pidlResult.propagateErr();
|
|
}
|
|
|
|
// The value of |flags| is the same value as used in ieframe!_EnsureIUri in
|
|
// Win7, which is called behind SHParseDisplayName. In Win10, on the other
|
|
// hand, an flag 0x03000000 is also passed to CreateUri, but we don't
|
|
// specify it because it's undocumented and unknown.
|
|
constexpr DWORD flags =
|
|
Uri_CREATE_NO_DECODE_EXTRA_INFO | Uri_CREATE_CANONICALIZE |
|
|
Uri_CREATE_CRACK_UNKNOWN_SCHEMES | Uri_CREATE_PRE_PROCESS_HTML_URI |
|
|
Uri_CREATE_IE_SETTINGS;
|
|
RefPtr<IUri> uri;
|
|
HRESULT hr;
|
|
SAFECALL_URLMON_FUNC(CreateUri, aUri, flags, 0, getter_AddRefs(uri));
|
|
if (FAILED(hr)) {
|
|
return LAUNCHER_ERROR_FROM_HRESULT(hr);
|
|
}
|
|
|
|
_bstr_t bstrUri;
|
|
|
|
hr = uri->GetAbsoluteUri(bstrUri.GetAddress());
|
|
if (FAILED(hr)) {
|
|
return LAUNCHER_ERROR_FROM_HRESULT(hr);
|
|
}
|
|
|
|
if (hr == S_FALSE) {
|
|
hr = uri->GetRawUri(bstrUri.GetAddress());
|
|
if (FAILED(hr)) {
|
|
return LAUNCHER_ERROR_FROM_HRESULT(hr);
|
|
}
|
|
}
|
|
|
|
return bstrUri;
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_UrlmonHeaderOnlyUtils_h
|