зеркало из https://github.com/mozilla/gecko-dev.git
698 строки
26 KiB
C++
698 строки
26 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 "ImportMap.h"
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#include "js/Array.h" // IsArrayObject
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#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
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#include "js/JSON.h" // JS_ParseJSON
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#include "LoadedScript.h"
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#include "ModuleLoaderBase.h" // ScriptLoaderInterface
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#include "nsContentUtils.h"
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#include "nsIScriptElement.h"
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#include "nsIScriptError.h"
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#include "nsJSUtils.h" // nsAutoJSString
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#include "nsNetUtil.h" // NS_NewURI
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#include "ScriptLoadRequest.h"
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using JS::SourceText;
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using mozilla::Err;
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using mozilla::LazyLogModule;
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using mozilla::MakeUnique;
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using mozilla::UniquePtr;
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using mozilla::WrapNotNull;
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namespace JS::loader {
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LazyLogModule ImportMap::gImportMapLog("ImportMap");
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#undef LOG
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#define LOG(args) \
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MOZ_LOG(ImportMap::gImportMapLog, mozilla::LogLevel::Debug, args)
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#define LOG_ENABLED() \
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MOZ_LOG_TEST(ImportMap::gImportMapLog, mozilla::LogLevel::Debug)
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void ReportWarningHelper::Report(const char* aMessageName,
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const nsTArray<nsString>& aParams) const {
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mLoader->ReportWarningToConsole(mRequest, aMessageName, aParams);
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#resolving-a-url-like-module-specifier
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static ResolveResult ResolveURLLikeModuleSpecifier(const nsAString& aSpecifier,
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nsIURI* aBaseURL) {
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nsCOMPtr<nsIURI> uri;
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nsresult rv;
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// Step 1. If specifier starts with "/", "./", or "../", then:
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if (StringBeginsWith(aSpecifier, u"/"_ns) ||
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StringBeginsWith(aSpecifier, u"./"_ns) ||
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StringBeginsWith(aSpecifier, u"../"_ns)) {
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// Step 1.1. Let url be the result of parsing specifier with baseURL as the
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// base URL.
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rv = NS_NewURI(getter_AddRefs(uri), aSpecifier, nullptr, aBaseURL);
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// Step 1.2. If url is failure, then return null.
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if (NS_FAILED(rv)) {
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return Err(ResolveError::Failure);
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}
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// Step 1.3. Return url.
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return WrapNotNull(uri);
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}
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// Step 2. Let url be the result of parsing specifier (with no base URL).
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rv = NS_NewURI(getter_AddRefs(uri), aSpecifier);
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// Step 3. If url is failure, then return null.
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if (NS_FAILED(rv)) {
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return Err(ResolveError::FailureMayBeBare);
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}
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// Step 4. Return url.
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return WrapNotNull(uri);
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#normalizing-a-specifier-key
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static void NormalizeSpecifierKey(const nsAString& aSpecifierKey,
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nsIURI* aBaseURL,
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const ReportWarningHelper& aWarning,
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nsAString& aRetVal) {
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// Step 1. If specifierKey is the empty string, then:
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if (aSpecifierKey.IsEmpty()) {
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// Step 1.1. Report a warning to the console that specifier keys cannot be
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// the empty string.
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aWarning.Report("ImportMapEmptySpecifierKeys");
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// Step 1.2. Return null.
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aRetVal = EmptyString();
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return;
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}
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// Step 2. Let url be the result of resolving a URL-like module specifier,
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// given specifierKey and baseURL.
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auto parseResult = ResolveURLLikeModuleSpecifier(aSpecifierKey, aBaseURL);
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// Step 3. If url is not null, then return the serialization of url.
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if (parseResult.isOk()) {
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nsCOMPtr<nsIURI> url = parseResult.unwrap();
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aRetVal = NS_ConvertUTF8toUTF16(url->GetSpecOrDefault());
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return;
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}
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// Step 4. Return specifierKey.
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aRetVal = aSpecifierKey;
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#sorting-and-normalizing-a-module-specifier-map
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static UniquePtr<SpecifierMap> SortAndNormalizeSpecifierMap(
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JSContext* aCx, JS::HandleObject aOriginalMap, nsIURI* aBaseURL,
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const ReportWarningHelper& aWarning) {
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// Step 1. Let normalized be an empty ordered map.
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UniquePtr<SpecifierMap> normalized = MakeUnique<SpecifierMap>();
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JS::Rooted<JS::IdVector> specifierKeys(aCx, JS::IdVector(aCx));
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if (!JS_Enumerate(aCx, aOriginalMap, &specifierKeys)) {
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return nullptr;
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}
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// Step 2. For each specifierKey → value of originalMap,
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for (size_t i = 0; i < specifierKeys.length(); i++) {
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const JS::RootedId specifierId(aCx, specifierKeys[i]);
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nsAutoJSString specifierKey;
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NS_ENSURE_TRUE(specifierKey.init(aCx, specifierId), nullptr);
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// Step 2.1. Let normalizedSpecifierKey be the result of normalizing a
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// specifier key given specifierKey and baseURL.
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nsString normalizedSpecifierKey;
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NormalizeSpecifierKey(specifierKey, aBaseURL, aWarning,
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normalizedSpecifierKey);
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// Step 2.2. If normalizedSpecifierKey is null, then continue.
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if (normalizedSpecifierKey.IsEmpty()) {
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continue;
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}
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JS::RootedValue idVal(aCx);
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NS_ENSURE_TRUE(JS_GetPropertyById(aCx, aOriginalMap, specifierId, &idVal),
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nullptr);
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// Step 2.3. If value is not a string, then:
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if (!idVal.isString()) {
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// Step 2.3.1. The user agent may report a warning to the console
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// indicating that addresses need to be strings.
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aWarning.Report("ImportMapAddressesNotStrings");
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// Step 2.3.2. Set normalized[normalizedSpecifierKey] to null.
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normalized->insert_or_assign(normalizedSpecifierKey, nullptr);
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// Step 2.3.3. Continue.
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continue;
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}
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nsAutoJSString value;
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NS_ENSURE_TRUE(value.init(aCx, idVal), nullptr);
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// Step 2.4. Let addressURL be the result of resolving a URL-like module
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// specifier given value and baseURL.
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auto parseResult = ResolveURLLikeModuleSpecifier(value, aBaseURL);
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// Step 2.5. If addressURL is null, then:
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if (parseResult.isErr()) {
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// Step 2.5.1. The user agent may report a warning to the console
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// indicating that the address was invalid.
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AutoTArray<nsString, 1> params;
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params.AppendElement(value);
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aWarning.Report("ImportMapInvalidAddress", params);
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// Step 2.5.2. Set normalized[normalizedSpecifierKey] to null.
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normalized->insert_or_assign(normalizedSpecifierKey, nullptr);
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// Step 2.5.3. Continue.
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continue;
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}
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nsCOMPtr<nsIURI> addressURL = parseResult.unwrap();
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nsCString address = addressURL->GetSpecOrDefault();
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// Step 2.6. If specifierKey ends with U+002F (/), and the serialization
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// of addressURL does not end with U+002F (/), then:
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if (StringEndsWith(specifierKey, u"/"_ns) &&
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!StringEndsWith(address, "/"_ns)) {
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// Step 2.6.1. The user agent may report a warning to the console
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// indicating that an invalid address was given for the specifier key
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// specifierKey; since specifierKey ends with a slash, the address needs
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// to as well.
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AutoTArray<nsString, 2> params;
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params.AppendElement(specifierKey);
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params.AppendElement(NS_ConvertUTF8toUTF16(address));
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aWarning.Report("ImportMapAddressNotEndsWithSlash", params);
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// Step 2.6.2. Set normalized[normalizedSpecifierKey] to null.
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normalized->insert_or_assign(normalizedSpecifierKey, nullptr);
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// Step 2.6.3. Continue.
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continue;
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}
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LOG(("ImportMap::SortAndNormalizeSpecifierMap {%s, %s}",
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NS_ConvertUTF16toUTF8(normalizedSpecifierKey).get(),
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addressURL->GetSpecOrDefault().get()));
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// Step 2.7. Set normalized[normalizedSpecifierKey] to addressURL.
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normalized->insert_or_assign(normalizedSpecifierKey, addressURL);
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}
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// Step 3: Return the result of sorting normalized, with an entry a being
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// less than an entry b if b’s key is code unit less than a’s key.
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//
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// Impl note: The sorting is done when inserting the entry.
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return normalized;
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}
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// Check if it's a map defined in
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// https://infra.spec.whatwg.org/#ordered-map
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//
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// If it is, *aIsMap will be set to true.
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static bool IsMapObject(JSContext* aCx, JS::HandleValue aMapVal, bool* aIsMap) {
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MOZ_ASSERT(aIsMap);
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*aIsMap = false;
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if (!aMapVal.isObject()) {
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return true;
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}
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bool isArray;
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if (!IsArrayObject(aCx, aMapVal, &isArray)) {
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return false;
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}
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*aIsMap = !isArray;
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return true;
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#sorting-and-normalizing-scopes
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static UniquePtr<ScopeMap> SortAndNormalizeScopes(
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JSContext* aCx, JS::HandleObject aOriginalMap, nsIURI* aBaseURL,
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const ReportWarningHelper& aWarning) {
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JS::Rooted<JS::IdVector> scopeKeys(aCx, JS::IdVector(aCx));
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if (!JS_Enumerate(aCx, aOriginalMap, &scopeKeys)) {
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return nullptr;
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}
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// Step 1. Let normalized be an empty map.
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UniquePtr<ScopeMap> normalized = MakeUnique<ScopeMap>();
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// Step 2. For each scopePrefix → potentialSpecifierMap of originalMap,
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for (size_t i = 0; i < scopeKeys.length(); i++) {
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const JS::RootedId scopeKey(aCx, scopeKeys[i]);
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nsAutoJSString scopePrefix;
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NS_ENSURE_TRUE(scopePrefix.init(aCx, scopeKey), nullptr);
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// Step 2.1. If potentialSpecifierMap is not an ordered map, then throw a
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// TypeError indicating that the value of the scope with prefix scopePrefix
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// needs to be a JSON object.
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JS::RootedValue mapVal(aCx);
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NS_ENSURE_TRUE(JS_GetPropertyById(aCx, aOriginalMap, scopeKey, &mapVal),
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nullptr);
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bool isMap;
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if (!IsMapObject(aCx, mapVal, &isMap)) {
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return nullptr;
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}
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if (!isMap) {
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const char16_t* scope = scopePrefix.get();
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JS_ReportErrorNumberUC(aCx, js::GetErrorMessage, nullptr,
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JSMSG_IMPORT_MAPS_SCOPE_VALUE_NOT_A_MAP, scope);
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return nullptr;
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}
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// Step 2.2. Let scopePrefixURL be the result of URL parsing scopePrefix
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// with baseURL.
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nsCOMPtr<nsIURI> scopePrefixURL;
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nsresult rv = NS_NewURI(getter_AddRefs(scopePrefixURL), scopePrefix,
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nullptr, aBaseURL);
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// Step 2.3. If scopePrefixURL is failure, then:
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if (NS_FAILED(rv)) {
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// Step 2.3.1. The user agent may report a warning to the console that
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// the scope prefix URL was not parseable.
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AutoTArray<nsString, 1> params;
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params.AppendElement(scopePrefix);
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aWarning.Report("ImportMapScopePrefixNotParseable", params);
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// Step 2.3.2. Continue.
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continue;
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}
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// Step 2.4. Let normalizedScopePrefix be the serialization of
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// scopePrefixURL.
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nsCString normalizedScopePrefix = scopePrefixURL->GetSpecOrDefault();
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// Step 2.5. Set normalized[normalizedScopePrefix] to the result of sorting
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// and normalizing a specifier map given potentialSpecifierMap and baseURL.
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JS::RootedObject potentialSpecifierMap(aCx, &mapVal.toObject());
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UniquePtr<SpecifierMap> specifierMap = SortAndNormalizeSpecifierMap(
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aCx, potentialSpecifierMap, aBaseURL, aWarning);
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if (!specifierMap) {
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return nullptr;
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}
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normalized->insert_or_assign(normalizedScopePrefix,
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std::move(specifierMap));
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}
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// Step 3. Return the result of sorting in descending order normalized, with
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// an entry a being less than an entry b if a's key is code unit less than b's
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// key.
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//
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// Impl note: The sorting is done when inserting the entry.
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return normalized;
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#parse-an-import-map-string
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// static
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UniquePtr<ImportMap> ImportMap::ParseString(
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JSContext* aCx, SourceText<char16_t>& aInput, nsIURI* aBaseURL,
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const ReportWarningHelper& aWarning) {
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// Step 1. Let parsed be the result of parsing JSON into Infra values given
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// input.
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JS::Rooted<JS::Value> parsedVal(aCx);
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if (!JS_ParseJSON(aCx, aInput.get(), aInput.length(), &parsedVal)) {
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NS_WARNING("Parsing Import map string failed");
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// If JS_ParseJSON fails we check if it throws a SyntaxError.
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// If so we update the error message from JSON parser to make it more clear
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// that the parsing of import map has failed.
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MOZ_ASSERT(JS_IsExceptionPending(aCx));
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JS::Rooted<JS::Value> exn(aCx);
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if (!JS_GetPendingException(aCx, &exn)) {
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return nullptr;
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}
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MOZ_ASSERT(exn.isObject());
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JS::Rooted<JSObject*> obj(aCx, &exn.toObject());
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JSErrorReport* err = JS_ErrorFromException(aCx, obj);
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if (err->exnType == JSEXN_SYNTAXERR) {
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JS_ClearPendingException(aCx);
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JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
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JSMSG_IMPORT_MAPS_PARSE_FAILED,
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err->message().c_str());
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}
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return nullptr;
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}
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// Step 2. If parsed is not an ordered map, then throw a TypeError indicating
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// that the top-level value needs to be a JSON object.
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bool isMap;
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if (!IsMapObject(aCx, parsedVal, &isMap)) {
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return nullptr;
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}
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if (!isMap) {
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JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
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JSMSG_IMPORT_MAPS_NOT_A_MAP);
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return nullptr;
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}
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JS::RootedObject parsedObj(aCx, &parsedVal.toObject());
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JS::RootedValue importsVal(aCx);
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if (!JS_GetProperty(aCx, parsedObj, "imports", &importsVal)) {
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return nullptr;
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}
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// Step 3. Let sortedAndNormalizedImports be an empty ordered map.
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//
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// Impl note: If parsed["imports"] doesn't exist, we will allocate
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// sortedAndNormalizedImports to an empty map in Step 8 below.
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UniquePtr<SpecifierMap> sortedAndNormalizedImports = nullptr;
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// Step 4. If parsed["imports"] exists, then:
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if (!importsVal.isUndefined()) {
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// Step 4.1. If parsed["imports"] is not an ordered map, then throw a
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// TypeError indicating that the "imports" top-level key needs to be a JSON
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// object.
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bool isMap;
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if (!IsMapObject(aCx, importsVal, &isMap)) {
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return nullptr;
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}
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if (!isMap) {
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JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
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JSMSG_IMPORT_MAPS_IMPORTS_NOT_A_MAP);
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return nullptr;
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}
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// Step 4.2. Set sortedAndNormalizedImports to the result of sorting and
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// normalizing a module specifier map given parsed["imports"] and baseURL.
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JS::RootedObject importsObj(aCx, &importsVal.toObject());
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sortedAndNormalizedImports =
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SortAndNormalizeSpecifierMap(aCx, importsObj, aBaseURL, aWarning);
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if (!sortedAndNormalizedImports) {
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return nullptr;
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}
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}
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JS::RootedValue scopesVal(aCx);
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if (!JS_GetProperty(aCx, parsedObj, "scopes", &scopesVal)) {
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return nullptr;
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}
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// Step 5. Let sortedAndNormalizedScopes be an empty ordered map.
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//
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// Impl note: If parsed["scopes"] doesn't exist, we will allocate
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// sortedAndNormalizedScopes to an empty map in Step 8 below.
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UniquePtr<ScopeMap> sortedAndNormalizedScopes = nullptr;
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// Step 6. If parsed["scopes"] exists, then:
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if (!scopesVal.isUndefined()) {
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// Step 6.1. If parsed["scopes"] is not an ordered map, then throw a
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// TypeError indicating that the "scopes" top-level key needs to be a JSON
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// object.
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bool isMap;
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if (!IsMapObject(aCx, scopesVal, &isMap)) {
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return nullptr;
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}
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if (!isMap) {
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JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
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JSMSG_IMPORT_MAPS_SCOPES_NOT_A_MAP);
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return nullptr;
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}
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// Step 6.2. Set sortedAndNormalizedScopes to the result of sorting and
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// normalizing scopes given parsed["scopes"] and baseURL.
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JS::RootedObject scopesObj(aCx, &scopesVal.toObject());
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sortedAndNormalizedScopes =
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SortAndNormalizeScopes(aCx, scopesObj, aBaseURL, aWarning);
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if (!sortedAndNormalizedScopes) {
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return nullptr;
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}
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}
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// Step 7. If parsed’s keys contains any items besides "imports" or
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// "scopes", then the user agent should report a warning to the console
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// indicating that an invalid top-level key was present in the import map.
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JS::Rooted<JS::IdVector> keys(aCx, JS::IdVector(aCx));
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if (!JS_Enumerate(aCx, parsedObj, &keys)) {
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return nullptr;
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}
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for (size_t i = 0; i < keys.length(); i++) {
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const JS::RootedId key(aCx, keys[i]);
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nsAutoJSString val;
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NS_ENSURE_TRUE(val.init(aCx, key), nullptr);
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if (val.EqualsLiteral("imports") || val.EqualsLiteral("scopes")) {
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continue;
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}
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AutoTArray<nsString, 1> params;
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params.AppendElement(val);
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aWarning.Report("ImportMapInvalidTopLevelKey", params);
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}
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// Impl note: Create empty maps for sortedAndNormalizedImports and
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// sortedAndNormalizedImports if they aren't allocated.
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if (!sortedAndNormalizedImports) {
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sortedAndNormalizedImports = MakeUnique<SpecifierMap>();
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}
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if (!sortedAndNormalizedScopes) {
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sortedAndNormalizedScopes = MakeUnique<ScopeMap>();
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}
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// Step 8. Return an import map whose imports are
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// sortedAndNormalizedImports and whose scopes scopes are
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// sortedAndNormalizedScopes.
|
||
return MakeUnique<ImportMap>(std::move(sortedAndNormalizedImports),
|
||
std::move(sortedAndNormalizedScopes));
|
||
}
|
||
|
||
// https://url.spec.whatwg.org/#is-special
|
||
static bool IsSpecialScheme(nsIURI* aURI) {
|
||
nsAutoCString scheme;
|
||
aURI->GetScheme(scheme);
|
||
return scheme.EqualsLiteral("ftp") || scheme.EqualsLiteral("file") ||
|
||
scheme.EqualsLiteral("http") || scheme.EqualsLiteral("https") ||
|
||
scheme.EqualsLiteral("ws") || scheme.EqualsLiteral("wss");
|
||
}
|
||
|
||
// https://html.spec.whatwg.org/multipage/webappapis.html#resolving-an-imports-match
|
||
static mozilla::Result<nsCOMPtr<nsIURI>, ResolveError> ResolveImportsMatch(
|
||
nsString& aNormalizedSpecifier, nsIURI* aAsURL,
|
||
const SpecifierMap* aSpecifierMap) {
|
||
// Step 1. For each specifierKey → resolutionResult of specifierMap,
|
||
for (auto&& [specifierKey, resolutionResult] : *aSpecifierMap) {
|
||
nsAutoString specifier{aNormalizedSpecifier};
|
||
nsCString asURL = aAsURL ? aAsURL->GetSpecOrDefault() : EmptyCString();
|
||
|
||
// Step 1.1. If specifierKey is normalizedSpecifier, then:
|
||
if (specifierKey.Equals(aNormalizedSpecifier)) {
|
||
// Step 1.1.1. If resolutionResult is null, then throw a TypeError
|
||
// indicating that resolution of specifierKey was blocked by a null entry.
|
||
// This will terminate the entire resolve a module specifier algorithm,
|
||
// without any further fallbacks.
|
||
if (!resolutionResult) {
|
||
LOG(
|
||
("ImportMap::ResolveImportsMatch normalizedSpecifier: %s, "
|
||
"specifierKey: %s, but resolution is null.",
|
||
NS_ConvertUTF16toUTF8(aNormalizedSpecifier).get(),
|
||
NS_ConvertUTF16toUTF8(specifierKey).get()));
|
||
return Err(ResolveError::BlockedByNullEntry);
|
||
}
|
||
|
||
// Step 1.1.2. Assert: resolutionResult is a URL.
|
||
MOZ_ASSERT(resolutionResult);
|
||
|
||
// Step 1.1.3. Return resolutionResult.
|
||
return resolutionResult;
|
||
}
|
||
|
||
// Step 1.2. If all of the following are true:
|
||
// specifierKey ends with U+002F (/),
|
||
// specifierKey is a code unit prefix of normalizedSpecifier, and
|
||
// either asURL is null, or asURL is special
|
||
if (StringEndsWith(specifierKey, u"/"_ns) &&
|
||
StringBeginsWith(aNormalizedSpecifier, specifierKey) &&
|
||
(!aAsURL || IsSpecialScheme(aAsURL))) {
|
||
// Step 1.2.1. If resolutionResult is null, then throw a TypeError
|
||
// indicating that resolution of specifierKey was blocked by a null entry.
|
||
// This will terminate the entire resolve a module specifier algorithm,
|
||
// without any further fallbacks.
|
||
if (!resolutionResult) {
|
||
LOG(
|
||
("ImportMap::ResolveImportsMatch normalizedSpecifier: %s, "
|
||
"specifierKey: %s, but resolution is null.",
|
||
NS_ConvertUTF16toUTF8(aNormalizedSpecifier).get(),
|
||
NS_ConvertUTF16toUTF8(specifierKey).get()));
|
||
return Err(ResolveError::BlockedByNullEntry);
|
||
}
|
||
|
||
// Step 1.2.2. Assert: resolutionResult is a URL.
|
||
MOZ_ASSERT(resolutionResult);
|
||
|
||
// Step 1.2.3. Let afterPrefix be the portion of normalizedSpecifier after
|
||
// the initial specifierKey prefix.
|
||
nsAutoString afterPrefix(
|
||
Substring(aNormalizedSpecifier, specifierKey.Length()));
|
||
|
||
// Step 1.2.4. Assert: resolutionResult, serialized, ends with U+002F (/),
|
||
// as enforced during parsing
|
||
MOZ_ASSERT(StringEndsWith(resolutionResult->GetSpecOrDefault(), "/"_ns));
|
||
|
||
// Step 1.2.5. Let url be the result of URL parsing afterPrefix with
|
||
// resolutionResult.
|
||
nsCOMPtr<nsIURI> url;
|
||
nsresult rv = NS_NewURI(getter_AddRefs(url), afterPrefix, nullptr,
|
||
resolutionResult);
|
||
|
||
// Step 1.2.6. If url is failure, then throw a TypeError indicating that
|
||
// resolution of normalizedSpecifier was blocked since the afterPrefix
|
||
// portion could not be URL-parsed relative to the resolutionResult mapped
|
||
// to by the specifierKey prefix.
|
||
//
|
||
// This will terminate the entire resolve a module specifier algorithm,
|
||
// without any further fallbacks.
|
||
if (NS_FAILED(rv)) {
|
||
LOG(
|
||
("ImportMap::ResolveImportsMatch normalizedSpecifier: %s, "
|
||
"specifierKey: %s, resolutionResult: %s, afterPrefix: %s, "
|
||
"but URL is not parsable.",
|
||
NS_ConvertUTF16toUTF8(aNormalizedSpecifier).get(),
|
||
NS_ConvertUTF16toUTF8(specifierKey).get(),
|
||
resolutionResult->GetSpecOrDefault().get(),
|
||
NS_ConvertUTF16toUTF8(afterPrefix).get()));
|
||
return Err(ResolveError::BlockedByAfterPrefix);
|
||
}
|
||
|
||
// Step 1.2.7. Assert: url is a URL.
|
||
MOZ_ASSERT(url);
|
||
|
||
// Step 1.2.8. If the serialization of resolutionResult is not a code unit
|
||
// prefix of the serialization of url, then throw a TypeError indicating
|
||
// that resolution of normalizedSpecifier was blocked due to it
|
||
// backtracking above its prefix specifierKey.
|
||
//
|
||
// This will terminate the entire resolve a module specifier algorithm,
|
||
// without any further fallbacks.
|
||
if (!StringBeginsWith(url->GetSpecOrDefault(),
|
||
resolutionResult->GetSpecOrDefault())) {
|
||
LOG(
|
||
("ImportMap::ResolveImportsMatch normalizedSpecifier: %s, "
|
||
"specifierKey: %s, "
|
||
"url %s does not start with resolutionResult %s.",
|
||
NS_ConvertUTF16toUTF8(aNormalizedSpecifier).get(),
|
||
NS_ConvertUTF16toUTF8(specifierKey).get(),
|
||
url->GetSpecOrDefault().get(),
|
||
resolutionResult->GetSpecOrDefault().get()));
|
||
return Err(ResolveError::BlockedByBacktrackingPrefix);
|
||
}
|
||
|
||
// Step 1.2.9. Return url.
|
||
return std::move(url);
|
||
}
|
||
}
|
||
|
||
// Step 2. Return null.
|
||
return nsCOMPtr<nsIURI>(nullptr);
|
||
}
|
||
|
||
// https://html.spec.whatwg.org/multipage/webappapis.html#resolve-a-module-specifier
|
||
// static
|
||
ResolveResult ImportMap::ResolveModuleSpecifier(ImportMap* aImportMap,
|
||
ScriptLoaderInterface* aLoader,
|
||
LoadedScript* aScript,
|
||
const nsAString& aSpecifier) {
|
||
LOG(("ImportMap::ResolveModuleSpecifier specifier: %s",
|
||
NS_ConvertUTF16toUTF8(aSpecifier).get()));
|
||
nsCOMPtr<nsIURI> baseURL;
|
||
if (aScript && !aScript->IsEventScript()) {
|
||
baseURL = aScript->BaseURL();
|
||
} else {
|
||
baseURL = aLoader->GetBaseURI();
|
||
}
|
||
|
||
// Step 7. Let asURL be the result of resolving a URL-like module specifier
|
||
// given specifier and baseURL.
|
||
//
|
||
// Impl note: Step 6 is done below if aImportMap exists.
|
||
auto parseResult = ResolveURLLikeModuleSpecifier(aSpecifier, baseURL);
|
||
nsCOMPtr<nsIURI> asURL;
|
||
if (parseResult.isOk()) {
|
||
asURL = parseResult.unwrap();
|
||
}
|
||
|
||
if (aImportMap) {
|
||
// Step 6. Let baseURLString be baseURL, serialized.
|
||
nsCString baseURLString = baseURL->GetSpecOrDefault();
|
||
|
||
// Step 8. Let normalizedSpecifier be the serialization of asURL, if asURL
|
||
// is non-null; otherwise, specifier.
|
||
nsAutoString normalizedSpecifier =
|
||
asURL ? NS_ConvertUTF8toUTF16(asURL->GetSpecOrDefault())
|
||
: nsAutoString{aSpecifier};
|
||
|
||
// Step 9. For each scopePrefix → scopeImports of importMap’s scopes,
|
||
for (auto&& [scopePrefix, scopeImports] : *aImportMap->mScopes) {
|
||
// Step 9.1. If scopePrefix is baseURLString, or if scopePrefix ends with
|
||
// U+002F (/) and scopePrefix is a code unit prefix of baseURLString,
|
||
// then:
|
||
if (scopePrefix.Equals(baseURLString) ||
|
||
(StringEndsWith(scopePrefix, "/"_ns) &&
|
||
StringBeginsWith(baseURLString, scopePrefix))) {
|
||
// Step 9.1.1. Let scopeImportsMatch be the result of resolving an
|
||
// imports match given normalizedSpecifier, asURL, and scopeImports.
|
||
auto result =
|
||
ResolveImportsMatch(normalizedSpecifier, asURL, scopeImports.get());
|
||
if (result.isErr()) {
|
||
return result.propagateErr();
|
||
}
|
||
|
||
nsCOMPtr<nsIURI> scopeImportsMatch = result.unwrap();
|
||
// Step 9.1.2. If scopeImportsMatch is not null, then return
|
||
// scopeImportsMatch.
|
||
if (scopeImportsMatch) {
|
||
LOG((
|
||
"ImportMap::ResolveModuleSpecifier returns scopeImportsMatch: %s",
|
||
scopeImportsMatch->GetSpecOrDefault().get()));
|
||
return WrapNotNull(scopeImportsMatch);
|
||
}
|
||
}
|
||
}
|
||
|
||
// Step 10. Let topLevelImportsMatch be the result of resolving an imports
|
||
// match given normalizedSpecifier, asURL, and importMap’s imports.
|
||
auto result = ResolveImportsMatch(normalizedSpecifier, asURL,
|
||
aImportMap->mImports.get());
|
||
if (result.isErr()) {
|
||
return result.propagateErr();
|
||
}
|
||
nsCOMPtr<nsIURI> topLevelImportsMatch = result.unwrap();
|
||
|
||
// Step 11. If topLevelImportsMatch is not null, then return
|
||
// topLevelImportsMatch.
|
||
if (topLevelImportsMatch) {
|
||
LOG(("ImportMap::ResolveModuleSpecifier returns topLevelImportsMatch: %s",
|
||
topLevelImportsMatch->GetSpecOrDefault().get()));
|
||
return WrapNotNull(topLevelImportsMatch);
|
||
}
|
||
}
|
||
|
||
// Step 12. At this point, the specifier was able to be turned in to a URL,
|
||
// but it wasn’t remapped to anything by importMap. If asURL is not null, then
|
||
// return asURL.
|
||
if (asURL) {
|
||
LOG(("ImportMap::ResolveModuleSpecifier returns asURL: %s",
|
||
asURL->GetSpecOrDefault().get()));
|
||
return WrapNotNull(asURL);
|
||
}
|
||
|
||
// Step 13. Throw a TypeError indicating that specifier was a bare specifier,
|
||
// but was not remapped to anything by importMap.
|
||
if (parseResult.unwrapErr() != ResolveError::FailureMayBeBare) {
|
||
// We may have failed to parse a non-bare specifier for another reason.
|
||
return Err(ResolveError::Failure);
|
||
}
|
||
|
||
return Err(ResolveError::InvalidBareSpecifier);
|
||
}
|
||
|
||
#undef LOG
|
||
#undef LOG_ENABLED
|
||
} // namespace JS::loader
|