mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 20:47:44 +00:00
393 lines
8.8 KiB
C++
393 lines
8.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "URLSearchParams.h"
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#include "mozilla/dom/URLSearchParamsBinding.h"
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#include "mozilla/dom/EncodingUtils.h"
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#include "nsDOMString.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(URLSearchParams, mObservers)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(URLSearchParams)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(URLSearchParams)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(URLSearchParams)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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URLSearchParams::URLSearchParams()
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{
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}
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URLSearchParams::~URLSearchParams()
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{
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DeleteAll();
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}
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JSObject*
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URLSearchParams::WrapObject(JSContext* aCx)
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{
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return URLSearchParamsBinding::Wrap(aCx, this);
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}
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/* static */ already_AddRefed<URLSearchParams>
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URLSearchParams::Constructor(const GlobalObject& aGlobal,
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const nsAString& aInit,
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ErrorResult& aRv)
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{
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nsRefPtr<URLSearchParams> sp = new URLSearchParams();
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sp->ParseInput(NS_ConvertUTF16toUTF8(aInit), nullptr);
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return sp.forget();
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}
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/* static */ already_AddRefed<URLSearchParams>
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URLSearchParams::Constructor(const GlobalObject& aGlobal,
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URLSearchParams& aInit,
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ErrorResult& aRv)
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{
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nsRefPtr<URLSearchParams> sp = new URLSearchParams();
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sp->mSearchParams = aInit.mSearchParams;
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return sp.forget();
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}
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void
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URLSearchParams::ParseInput(const nsACString& aInput,
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URLSearchParamsObserver* aObserver)
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{
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// Remove all the existing data before parsing a new input.
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DeleteAll();
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nsACString::const_iterator start, end;
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aInput.BeginReading(start);
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aInput.EndReading(end);
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nsACString::const_iterator iter(start);
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while (start != end) {
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nsAutoCString string;
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if (FindCharInReadable('&', iter, end)) {
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string.Assign(Substring(start, iter));
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start = ++iter;
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} else {
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string.Assign(Substring(start, end));
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start = end;
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}
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if (string.IsEmpty()) {
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continue;
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}
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nsACString::const_iterator eqStart, eqEnd;
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string.BeginReading(eqStart);
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string.EndReading(eqEnd);
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nsACString::const_iterator eqIter(eqStart);
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nsAutoCString name;
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nsAutoCString value;
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if (FindCharInReadable('=', eqIter, eqEnd)) {
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name.Assign(Substring(eqStart, eqIter));
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++eqIter;
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value.Assign(Substring(eqIter, eqEnd));
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} else {
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name.Assign(string);
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}
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nsAutoString decodedName;
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DecodeString(name, decodedName);
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nsAutoString decodedValue;
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DecodeString(value, decodedValue);
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AppendInternal(decodedName, decodedValue);
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}
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NotifyObservers(aObserver);
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}
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void
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URLSearchParams::DecodeString(const nsACString& aInput, nsAString& aOutput)
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{
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nsACString::const_iterator start, end;
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aInput.BeginReading(start);
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aInput.EndReading(end);
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nsCString unescaped;
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while (start != end) {
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// replace '+' with U+0020
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if (*start == '+') {
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unescaped.Append(' ');
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++start;
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continue;
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}
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// Percent decode algorithm
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if (*start == '%') {
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nsACString::const_iterator first(start);
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++first;
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nsACString::const_iterator second(first);
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++second;
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#define ASCII_HEX_DIGIT( x ) \
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((x >= 0x41 && x <= 0x46) || \
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(x >= 0x61 && x <= 0x66) || \
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(x >= 0x30 && x <= 0x39))
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#define HEX_DIGIT( x ) \
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(*x >= 0x30 && *x <= 0x39 \
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? *x - 0x30 \
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: (*x >= 0x41 && *x <= 0x46 \
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? *x - 0x37 \
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: *x - 0x57))
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if (first != end && second != end &&
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ASCII_HEX_DIGIT(*first) && ASCII_HEX_DIGIT(*second)) {
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unescaped.Append(HEX_DIGIT(first) * 16 + HEX_DIGIT(second));
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start = ++second;
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continue;
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} else {
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unescaped.Append('%');
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++start;
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continue;
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}
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}
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unescaped.Append(*start);
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++start;
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}
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ConvertString(unescaped, aOutput);
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}
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void
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URLSearchParams::ConvertString(const nsACString& aInput, nsAString& aOutput)
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{
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aOutput.Truncate();
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if (!mDecoder) {
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mDecoder = EncodingUtils::DecoderForEncoding("UTF-8");
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if (!mDecoder) {
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MOZ_ASSERT(mDecoder, "Failed to create a decoder.");
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return;
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}
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}
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int32_t inputLength = aInput.Length();
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int32_t outputLength = 0;
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nsresult rv = mDecoder->GetMaxLength(aInput.BeginReading(), inputLength,
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&outputLength);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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if (!aOutput.SetLength(outputLength, fallible_t())) {
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return;
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}
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int32_t newOutputLength = outputLength;
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rv = mDecoder->Convert(aInput.BeginReading(), &inputLength,
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aOutput.BeginWriting(), &newOutputLength);
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if (NS_FAILED(rv)) {
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aOutput.Truncate();
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return;
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}
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if (newOutputLength < outputLength) {
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aOutput.Truncate(newOutputLength);
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}
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}
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void
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URLSearchParams::AddObserver(URLSearchParamsObserver* aObserver)
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{
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MOZ_ASSERT(aObserver);
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MOZ_ASSERT(!mObservers.Contains(aObserver));
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mObservers.AppendElement(aObserver);
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}
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void
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URLSearchParams::RemoveObserver(URLSearchParamsObserver* aObserver)
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{
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MOZ_ASSERT(aObserver);
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mObservers.RemoveElement(aObserver);
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}
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void
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URLSearchParams::RemoveObservers()
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{
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mObservers.Clear();
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}
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void
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URLSearchParams::Get(const nsAString& aName, nsString& aRetval)
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{
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SetDOMStringToNull(aRetval);
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for (uint32_t i = 0, len = mSearchParams.Length(); i < len; ++i) {
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if (mSearchParams[i].mKey.Equals(aName)) {
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aRetval.Assign(mSearchParams[i].mValue);
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break;
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}
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}
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}
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void
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URLSearchParams::GetAll(const nsAString& aName, nsTArray<nsString>& aRetval)
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{
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aRetval.Clear();
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for (uint32_t i = 0, len = mSearchParams.Length(); i < len; ++i) {
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if (mSearchParams[i].mKey.Equals(aName)) {
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aRetval.AppendElement(mSearchParams[i].mValue);
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}
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}
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}
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void
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URLSearchParams::Set(const nsAString& aName, const nsAString& aValue)
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{
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Param* param = nullptr;
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for (uint32_t i = 0, len = mSearchParams.Length(); i < len;) {
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if (!mSearchParams[i].mKey.Equals(aName)) {
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++i;
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continue;
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}
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if (!param) {
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param = &mSearchParams[i];
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++i;
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continue;
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}
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// Remove duplicates.
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mSearchParams.RemoveElementAt(i);
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--len;
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}
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if (!param) {
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param = mSearchParams.AppendElement();
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param->mKey = aName;
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}
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param->mValue = aValue;
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NotifyObservers(nullptr);
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}
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void
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URLSearchParams::Append(const nsAString& aName, const nsAString& aValue)
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{
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AppendInternal(aName, aValue);
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NotifyObservers(nullptr);
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}
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void
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URLSearchParams::AppendInternal(const nsAString& aName, const nsAString& aValue)
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{
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Param* param = mSearchParams.AppendElement();
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param->mKey = aName;
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param->mValue = aValue;
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}
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bool
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URLSearchParams::Has(const nsAString& aName)
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{
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for (uint32_t i = 0, len = mSearchParams.Length(); i < len; ++i) {
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if (mSearchParams[i].mKey.Equals(aName)) {
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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
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URLSearchParams::Delete(const nsAString& aName)
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{
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bool found = false;
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for (uint32_t i = 0; i < mSearchParams.Length();) {
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if (mSearchParams[i].mKey.Equals(aName)) {
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mSearchParams.RemoveElementAt(i);
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found = true;
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} else {
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++i;
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}
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}
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if (found) {
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NotifyObservers(nullptr);
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}
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}
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void
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URLSearchParams::DeleteAll()
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{
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mSearchParams.Clear();
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}
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namespace {
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void SerializeString(const nsCString& aInput, nsAString& aValue)
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{
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const unsigned char* p = (const unsigned char*) aInput.get();
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while (p && *p) {
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// ' ' to '+'
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if (*p == 0x20) {
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aValue.Append(0x2B);
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// Percent Encode algorithm
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} else if (*p == 0x2A || *p == 0x2D || *p == 0x2E ||
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(*p >= 0x30 && *p <= 0x39) ||
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(*p >= 0x41 && *p <= 0x5A) || *p == 0x5F ||
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(*p >= 0x61 && *p <= 0x7A)) {
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aValue.Append(*p);
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} else {
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aValue.AppendPrintf("%%%.2X", *p);
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}
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++p;
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}
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}
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} // anonymous namespace
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void
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URLSearchParams::Serialize(nsAString& aValue) const
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{
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aValue.Truncate();
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bool first = true;
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for (uint32_t i = 0, len = mSearchParams.Length(); i < len; ++i) {
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if (first) {
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first = false;
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} else {
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aValue.Append('&');
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}
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SerializeString(NS_ConvertUTF16toUTF8(mSearchParams[i].mKey), aValue);
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aValue.Append('=');
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SerializeString(NS_ConvertUTF16toUTF8(mSearchParams[i].mValue), aValue);
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}
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}
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void
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URLSearchParams::NotifyObservers(URLSearchParamsObserver* aExceptObserver)
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{
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for (uint32_t i = 0; i < mObservers.Length(); ++i) {
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if (mObservers[i] != aExceptObserver) {
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mObservers[i]->URLSearchParamsUpdated(this);
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}
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}
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}
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} // namespace dom
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} // namespace mozilla
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