forked from mirrors/gecko-dev
635 lines
17 KiB
C++
635 lines
17 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/InternalHeaders.h"
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#include "FetchUtil.h"
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#include "mozilla/dom/FetchTypes.h"
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#include "mozilla/ErrorResult.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsContentUtils.h"
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#include "nsIHttpChannel.h"
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#include "nsIHttpHeaderVisitor.h"
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#include "nsNetUtil.h"
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#include "nsReadableUtils.h"
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namespace mozilla::dom {
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InternalHeaders::InternalHeaders(nsTArray<Entry>&& aHeaders,
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HeadersGuardEnum aGuard)
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: mGuard(aGuard), mList(std::move(aHeaders)), mListDirty(true) {}
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InternalHeaders::InternalHeaders(
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const nsTArray<HeadersEntry>& aHeadersEntryList, HeadersGuardEnum aGuard)
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: mGuard(aGuard), mListDirty(true) {
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for (const HeadersEntry& headersEntry : aHeadersEntryList) {
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mList.AppendElement(Entry(headersEntry.name(), headersEntry.value()));
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}
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}
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void InternalHeaders::ToIPC(nsTArray<HeadersEntry>& aIPCHeaders,
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HeadersGuardEnum& aGuard) {
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aGuard = mGuard;
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aIPCHeaders.Clear();
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for (Entry& entry : mList) {
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aIPCHeaders.AppendElement(HeadersEntry(entry.mName, entry.mValue));
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}
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}
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bool InternalHeaders::IsValidHeaderValue(const nsCString& aLowerName,
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const nsCString& aNormalizedValue,
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ErrorResult& aRv) {
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// Steps 2 to 6 for ::Set() and ::Append() in the spec.
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// Step 2
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if (IsInvalidName(aLowerName, aRv) || IsInvalidValue(aNormalizedValue, aRv)) {
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return false;
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}
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// Step 3
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if (IsImmutable(aRv)) {
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return false;
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}
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// Step 4
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if (mGuard == HeadersGuardEnum::Request) {
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if (IsForbiddenRequestHeader(aLowerName, aNormalizedValue)) {
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return false;
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}
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}
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// Step 5
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if (mGuard == HeadersGuardEnum::Request_no_cors) {
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nsAutoCString tempValue;
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Get(aLowerName, tempValue, aRv);
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if (tempValue.IsVoid()) {
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tempValue = aNormalizedValue;
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} else {
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tempValue.Append(", ");
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tempValue.Append(aNormalizedValue);
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}
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if (!nsContentUtils::IsCORSSafelistedRequestHeader(aLowerName, tempValue)) {
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return false;
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}
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}
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// Step 6
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else if (IsForbiddenResponseHeader(aLowerName)) {
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return false;
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}
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return true;
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}
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void InternalHeaders::Append(const nsACString& aName, const nsACString& aValue,
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ErrorResult& aRv) {
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// Step 1
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nsAutoCString trimValue;
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NS_TrimHTTPWhitespace(aValue, trimValue);
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// Steps 2 to 6
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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if (!IsValidHeaderValue(lowerName, trimValue, aRv)) {
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return;
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}
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// Step 7
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nsAutoCString name(aName);
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ReuseExistingNameIfExists(name);
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SetListDirty();
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mList.AppendElement(Entry(name, trimValue));
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// Step 8
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if (mGuard == HeadersGuardEnum::Request_no_cors) {
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RemovePrivilegedNoCorsRequestHeaders();
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}
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}
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void InternalHeaders::RemovePrivilegedNoCorsRequestHeaders() {
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bool dirty = false;
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// remove in reverse order to minimize copying
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for (int32_t i = mList.Length() - 1; i >= 0; --i) {
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if (IsPrivilegedNoCorsRequestHeaderName(mList[i].mName)) {
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mList.RemoveElementAt(i);
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dirty = true;
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}
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}
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if (dirty) {
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SetListDirty();
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}
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}
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bool InternalHeaders::DeleteInternal(const nsCString& aLowerName,
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ErrorResult& aRv) {
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bool dirty = false;
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// remove in reverse order to minimize copying
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for (int32_t i = mList.Length() - 1; i >= 0; --i) {
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if (mList[i].mName.EqualsIgnoreCase(aLowerName.get())) {
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mList.RemoveElementAt(i);
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dirty = true;
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}
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}
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if (dirty) {
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SetListDirty();
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}
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return dirty;
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}
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void InternalHeaders::Delete(const nsACString& aName, ErrorResult& aRv) {
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// See https://fetch.spec.whatwg.org/#dom-headers-delete
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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// Step 1
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if (IsInvalidName(lowerName, aRv)) {
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return;
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}
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if (IsImmutable(aRv)) {
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return;
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}
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nsAutoCString value;
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GetInternal(lowerName, value, aRv);
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if (IsForbiddenRequestHeader(lowerName, value)) {
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return;
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}
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// Step 2
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if (mGuard == HeadersGuardEnum::Request_no_cors &&
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!IsNoCorsSafelistedRequestHeaderName(lowerName) &&
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!IsPrivilegedNoCorsRequestHeaderName(lowerName)) {
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return;
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}
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if (IsForbiddenResponseHeader(lowerName)) {
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return;
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}
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// Steps 3, 4, and 5
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if (!DeleteInternal(lowerName, aRv)) {
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return;
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}
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// Step 6
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if (mGuard == HeadersGuardEnum::Request_no_cors) {
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RemovePrivilegedNoCorsRequestHeaders();
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}
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}
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void InternalHeaders::Get(const nsACString& aName, nsACString& aValue,
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ErrorResult& aRv) const {
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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if (IsInvalidName(lowerName, aRv)) {
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return;
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}
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GetInternal(lowerName, aValue, aRv);
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}
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void InternalHeaders::GetInternal(const nsCString& aLowerName,
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nsACString& aValue, ErrorResult& aRv) const {
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const char* delimiter = ", ";
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bool firstValueFound = false;
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (mList[i].mName.EqualsIgnoreCase(aLowerName.get())) {
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if (firstValueFound) {
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aValue += delimiter;
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}
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aValue += mList[i].mValue;
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firstValueFound = true;
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}
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}
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// No value found, so return null to content
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if (!firstValueFound) {
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aValue.SetIsVoid(true);
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}
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}
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void InternalHeaders::GetSetCookie(nsTArray<nsCString>& aValues) const {
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (mList[i].mName.EqualsIgnoreCase("Set-Cookie")) {
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aValues.AppendElement(mList[i].mValue);
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}
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}
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}
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void InternalHeaders::GetFirst(const nsACString& aName, nsACString& aValue,
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ErrorResult& aRv) const {
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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if (IsInvalidName(lowerName, aRv)) {
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return;
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}
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (mList[i].mName.EqualsIgnoreCase(lowerName.get())) {
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aValue = mList[i].mValue;
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return;
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}
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}
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// No value found, so return null to content
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aValue.SetIsVoid(true);
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}
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bool InternalHeaders::Has(const nsACString& aName, ErrorResult& aRv) const {
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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if (IsInvalidName(lowerName, aRv)) {
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return false;
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}
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (mList[i].mName.EqualsIgnoreCase(lowerName.get())) {
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return true;
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}
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}
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return false;
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}
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void InternalHeaders::Set(const nsACString& aName, const nsACString& aValue,
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ErrorResult& aRv) {
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// Step 1
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nsAutoCString trimValue;
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NS_TrimHTTPWhitespace(aValue, trimValue);
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// Steps 2 to 6
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nsAutoCString lowerName;
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ToLowerCase(aName, lowerName);
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if (!IsValidHeaderValue(lowerName, trimValue, aRv)) {
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return;
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}
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// Step 7
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SetListDirty();
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int32_t firstIndex = INT32_MAX;
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// remove in reverse order to minimize copying
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for (int32_t i = mList.Length() - 1; i >= 0; --i) {
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if (mList[i].mName.EqualsIgnoreCase(lowerName.get())) {
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firstIndex = std::min(firstIndex, i);
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mList.RemoveElementAt(i);
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}
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}
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if (firstIndex < INT32_MAX) {
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Entry* entry = mList.InsertElementAt(firstIndex);
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entry->mName = aName;
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entry->mValue = trimValue;
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} else {
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mList.AppendElement(Entry(aName, trimValue));
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}
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// Step 8
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if (mGuard == HeadersGuardEnum::Request_no_cors) {
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RemovePrivilegedNoCorsRequestHeaders();
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}
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}
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void InternalHeaders::Clear() {
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SetListDirty();
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mList.Clear();
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}
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void InternalHeaders::SetGuard(HeadersGuardEnum aGuard, ErrorResult& aRv) {
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// The guard is only checked during ::Set() and ::Append() in the spec. It
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// does not require revalidating headers already set.
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mGuard = aGuard;
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}
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InternalHeaders::~InternalHeaders() = default;
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// static
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bool InternalHeaders::IsNoCorsSafelistedRequestHeaderName(
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const nsCString& aName) {
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return aName.EqualsIgnoreCase("accept") ||
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aName.EqualsIgnoreCase("accept-language") ||
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aName.EqualsIgnoreCase("content-language") ||
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aName.EqualsIgnoreCase("content-type");
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}
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// static
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bool InternalHeaders::IsPrivilegedNoCorsRequestHeaderName(
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const nsCString& aName) {
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return aName.EqualsIgnoreCase("range");
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}
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// static
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bool InternalHeaders::IsRevalidationHeader(const nsCString& aName) {
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return aName.EqualsIgnoreCase("if-modified-since") ||
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aName.EqualsIgnoreCase("if-none-match") ||
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aName.EqualsIgnoreCase("if-unmodified-since") ||
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aName.EqualsIgnoreCase("if-match") ||
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aName.EqualsIgnoreCase("if-range");
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}
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// static
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bool InternalHeaders::IsInvalidName(const nsACString& aName, ErrorResult& aRv) {
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if (!NS_IsValidHTTPToken(aName)) {
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aRv.ThrowTypeError<MSG_INVALID_HEADER_NAME>(aName);
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return true;
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}
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return false;
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}
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// static
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bool InternalHeaders::IsInvalidValue(const nsACString& aValue,
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ErrorResult& aRv) {
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if (!NS_IsReasonableHTTPHeaderValue(aValue)) {
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aRv.ThrowTypeError<MSG_INVALID_HEADER_VALUE>(aValue);
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return true;
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}
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return false;
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}
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bool InternalHeaders::IsImmutable(ErrorResult& aRv) const {
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if (mGuard == HeadersGuardEnum::Immutable) {
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aRv.ThrowTypeError("Headers are immutable and cannot be modified.");
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return true;
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}
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return false;
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}
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bool InternalHeaders::IsForbiddenRequestHeader(const nsCString& aName,
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const nsACString& aValue) const {
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return mGuard == HeadersGuardEnum::Request &&
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nsContentUtils::IsForbiddenRequestHeader(aName, aValue);
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}
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bool InternalHeaders::IsForbiddenRequestNoCorsHeader(
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const nsCString& aName) const {
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return mGuard == HeadersGuardEnum::Request_no_cors &&
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!nsContentUtils::IsCORSSafelistedRequestHeader(aName, ""_ns);
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}
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bool InternalHeaders::IsForbiddenRequestNoCorsHeader(
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const nsCString& aName, const nsACString& aValue) const {
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return mGuard == HeadersGuardEnum::Request_no_cors &&
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!nsContentUtils::IsCORSSafelistedRequestHeader(aName, aValue);
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}
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bool InternalHeaders::IsForbiddenResponseHeader(const nsCString& aName) const {
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return mGuard == HeadersGuardEnum::Response &&
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nsContentUtils::IsForbiddenResponseHeader(aName);
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}
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void InternalHeaders::Fill(const InternalHeaders& aInit, ErrorResult& aRv) {
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const nsTArray<Entry>& list = aInit.mList;
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for (uint32_t i = 0; i < list.Length() && !aRv.Failed(); ++i) {
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const Entry& entry = list[i];
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Append(entry.mName, entry.mValue, aRv);
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}
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}
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void InternalHeaders::Fill(const Sequence<Sequence<nsCString>>& aInit,
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ErrorResult& aRv) {
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for (uint32_t i = 0; i < aInit.Length() && !aRv.Failed(); ++i) {
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const Sequence<nsCString>& tuple = aInit[i];
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if (tuple.Length() != 2) {
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aRv.ThrowTypeError(
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"Headers require name/value tuples when being initialized by a "
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"sequence.");
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return;
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}
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Append(tuple[0], tuple[1], aRv);
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}
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}
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void InternalHeaders::Fill(const Record<nsCString, nsCString>& aInit,
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ErrorResult& aRv) {
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for (auto& entry : aInit.Entries()) {
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Append(entry.mKey, entry.mValue, aRv);
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if (aRv.Failed()) {
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return;
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}
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}
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}
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namespace {
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class FillHeaders final : public nsIHttpHeaderVisitor {
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RefPtr<InternalHeaders> mInternalHeaders;
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~FillHeaders() = default;
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public:
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NS_DECL_ISUPPORTS
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explicit FillHeaders(InternalHeaders* aInternalHeaders)
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: mInternalHeaders(aInternalHeaders) {
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MOZ_DIAGNOSTIC_ASSERT(mInternalHeaders);
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}
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NS_IMETHOD
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VisitHeader(const nsACString& aHeader, const nsACString& aValue) override {
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mInternalHeaders->Append(aHeader, aValue, IgnoreErrors());
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return NS_OK;
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}
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};
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NS_IMPL_ISUPPORTS(FillHeaders, nsIHttpHeaderVisitor)
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} // namespace
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void InternalHeaders::FillResponseHeaders(nsIRequest* aRequest) {
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nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aRequest);
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if (!httpChannel) {
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return;
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}
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RefPtr<FillHeaders> visitor = new FillHeaders(this);
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nsresult rv = httpChannel->VisitResponseHeaders(visitor);
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if (NS_FAILED(rv)) {
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NS_WARNING("failed to fill headers");
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}
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}
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bool InternalHeaders::HasOnlySimpleHeaders() const {
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (!nsContentUtils::IsCORSSafelistedRequestHeader(mList[i].mName,
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mList[i].mValue)) {
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return false;
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}
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}
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return true;
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}
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bool InternalHeaders::HasRevalidationHeaders() const {
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for (uint32_t i = 0; i < mList.Length(); ++i) {
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if (IsRevalidationHeader(mList[i].mName)) {
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return true;
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}
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}
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return false;
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}
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// static
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already_AddRefed<InternalHeaders> InternalHeaders::BasicHeaders(
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InternalHeaders* aHeaders) {
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RefPtr<InternalHeaders> basic = new InternalHeaders(*aHeaders);
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ErrorResult result;
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// The Set-Cookie headers cannot be invalid mutable headers, so the Delete
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// must succeed.
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basic->Delete("Set-Cookie"_ns, result);
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MOZ_ASSERT(!result.Failed());
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basic->Delete("Set-Cookie2"_ns, result);
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MOZ_ASSERT(!result.Failed());
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return basic.forget();
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}
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// static
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already_AddRefed<InternalHeaders> InternalHeaders::CORSHeaders(
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InternalHeaders* aHeaders, RequestCredentials aCredentialsMode) {
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RefPtr<InternalHeaders> cors = new InternalHeaders(aHeaders->mGuard);
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ErrorResult result;
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nsAutoCString acExposedNames;
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aHeaders->Get("Access-Control-Expose-Headers"_ns, acExposedNames, result);
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MOZ_ASSERT(!result.Failed());
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bool allowAllHeaders = false;
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AutoTArray<nsCString, 5> exposeNamesArray;
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for (const nsACString& token :
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nsCCharSeparatedTokenizer(acExposedNames, ',').ToRange()) {
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if (token.IsEmpty()) {
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continue;
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}
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if (!NS_IsValidHTTPToken(token)) {
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NS_WARNING(
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"Got invalid HTTP token in Access-Control-Expose-Headers. Header "
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"value is:");
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NS_WARNING(acExposedNames.get());
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exposeNamesArray.Clear();
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break;
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}
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if (token.EqualsLiteral("*") &&
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aCredentialsMode != RequestCredentials::Include) {
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allowAllHeaders = true;
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}
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exposeNamesArray.AppendElement(token);
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}
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nsCaseInsensitiveCStringArrayComparator comp;
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for (uint32_t i = 0; i < aHeaders->mList.Length(); ++i) {
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const Entry& entry = aHeaders->mList[i];
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if (allowAllHeaders) {
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cors->Append(entry.mName, entry.mValue, result);
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MOZ_ASSERT(!result.Failed());
|
|
} else if (entry.mName.EqualsIgnoreCase("cache-control") ||
|
|
entry.mName.EqualsIgnoreCase("content-language") ||
|
|
entry.mName.EqualsIgnoreCase("content-type") ||
|
|
entry.mName.EqualsIgnoreCase("content-length") ||
|
|
entry.mName.EqualsIgnoreCase("expires") ||
|
|
entry.mName.EqualsIgnoreCase("last-modified") ||
|
|
entry.mName.EqualsIgnoreCase("pragma") ||
|
|
exposeNamesArray.Contains(entry.mName, comp)) {
|
|
cors->Append(entry.mName, entry.mValue, result);
|
|
MOZ_ASSERT(!result.Failed());
|
|
}
|
|
}
|
|
|
|
return cors.forget();
|
|
}
|
|
|
|
void InternalHeaders::GetEntries(
|
|
nsTArray<InternalHeaders::Entry>& aEntries) const {
|
|
MOZ_ASSERT(aEntries.IsEmpty());
|
|
aEntries.AppendElements(mList);
|
|
}
|
|
|
|
void InternalHeaders::GetUnsafeHeaders(nsTArray<nsCString>& aNames) const {
|
|
MOZ_ASSERT(aNames.IsEmpty());
|
|
for (uint32_t i = 0; i < mList.Length(); ++i) {
|
|
const Entry& header = mList[i];
|
|
if (!nsContentUtils::IsCORSSafelistedRequestHeader(header.mName,
|
|
header.mValue)) {
|
|
aNames.AppendElement(header.mName);
|
|
}
|
|
}
|
|
}
|
|
|
|
void InternalHeaders::MaybeSortList() {
|
|
class Comparator {
|
|
public:
|
|
bool Equals(const Entry& aA, const Entry& aB) const {
|
|
return aA.mName == aB.mName;
|
|
}
|
|
|
|
bool LessThan(const Entry& aA, const Entry& aB) const {
|
|
return aA.mName < aB.mName;
|
|
}
|
|
};
|
|
|
|
if (!mListDirty) {
|
|
return;
|
|
}
|
|
|
|
mListDirty = false;
|
|
|
|
Comparator comparator;
|
|
|
|
mSortedList.Clear();
|
|
for (const Entry& entry : mList) {
|
|
bool found = false;
|
|
|
|
// We combine every header but Set-Cookie.
|
|
if (!entry.mName.EqualsIgnoreCase("Set-Cookie")) {
|
|
for (Entry& sortedEntry : mSortedList) {
|
|
if (sortedEntry.mName.EqualsIgnoreCase(entry.mName.get())) {
|
|
sortedEntry.mValue += ", ";
|
|
sortedEntry.mValue += entry.mValue;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
Entry newEntry = entry;
|
|
ToLowerCase(newEntry.mName);
|
|
mSortedList.InsertElementSorted(newEntry, comparator);
|
|
}
|
|
}
|
|
}
|
|
|
|
void InternalHeaders::SetListDirty() {
|
|
mSortedList.Clear();
|
|
mListDirty = true;
|
|
}
|
|
|
|
void InternalHeaders::ReuseExistingNameIfExists(nsCString& aName) const {
|
|
for (const Entry& entry : mList) {
|
|
if (entry.mName.EqualsIgnoreCase(aName.get())) {
|
|
aName = entry.mName;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla::dom
|