forked from mirrors/gecko-dev
110 lines
3.5 KiB
C++
110 lines
3.5 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 "nsServerTiming.h"
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#include "nsHttp.h"
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NS_IMPL_ISUPPORTS(nsServerTiming, nsIServerTiming)
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NS_IMETHODIMP
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nsServerTiming::GetName(nsACString& aName) {
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aName.Assign(mName);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsServerTiming::GetDuration(double* aDuration) {
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*aDuration = mDuration;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsServerTiming::GetDescription(nsACString& aDescription) {
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aDescription.Assign(mDescription);
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return NS_OK;
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}
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namespace mozilla {
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namespace net {
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static double ParseDouble(const nsACString& aString) {
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nsresult rv;
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double val = PromiseFlatCString(aString).ToDouble(&rv);
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return NS_FAILED(rv) ? 0.0f : val;
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}
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void ServerTimingParser::Parse() {
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// https://w3c.github.io/server-timing/#the-server-timing-header-field
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// Server-Timing = #server-timing-metric
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// server-timing-metric = metric-name *( OWS ";" OWS server-timing-param
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// ) metric-name = token server-timing-param =
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// server-timing-param-name OWS "=" OWS
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// server-timing-param-value
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// server-timing-param-name = token
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// server-timing-param-value = token / quoted-string
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ParsedHeaderValueListList parsedHeader(mValue, false);
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for (uint32_t index = 0; index < parsedHeader.mValues.Length(); ++index) {
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if (parsedHeader.mValues[index].mValues.IsEmpty()) {
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continue;
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}
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// According to spec, the first ParsedHeaderPair's name is metric-name.
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RefPtr<nsServerTiming> timingHeader = new nsServerTiming();
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mServerTimingHeaders.AppendElement(timingHeader);
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timingHeader->SetName(parsedHeader.mValues[index].mValues[0].mName);
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if (parsedHeader.mValues[index].mValues.Length() == 1) {
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continue;
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}
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// Try to find duration and description from the rest ParsedHeaderPairs.
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bool foundDuration = false;
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bool foundDescription = false;
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for (uint32_t pairIndex = 1;
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pairIndex < parsedHeader.mValues[index].mValues.Length();
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++pairIndex) {
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nsDependentCSubstring& currentName =
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parsedHeader.mValues[index].mValues[pairIndex].mName;
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nsDependentCSubstring& currentValue =
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parsedHeader.mValues[index].mValues[pairIndex].mValue;
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// We should only take the value from the first
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// occurrence of server-timing-param-name ("dur" and "desc").
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// This is true whether or not the value makes any sense (or, indeed, if
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// there even is a value).
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if (currentName.LowerCaseEqualsASCII("dur") && !foundDuration) {
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if (currentValue.BeginReading()) {
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timingHeader->SetDuration(ParseDouble(currentValue));
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} else {
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timingHeader->SetDuration(0.0);
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}
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foundDuration = true;
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} else if (currentName.LowerCaseEqualsASCII("desc") &&
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!foundDescription) {
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if (!currentValue.IsEmpty()) {
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timingHeader->SetDescription(currentValue);
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} else {
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timingHeader->SetDescription(""_ns);
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}
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foundDescription = true;
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}
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if (foundDuration && foundDescription) {
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break;
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}
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}
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}
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}
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nsTArray<nsCOMPtr<nsIServerTiming>>&&
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ServerTimingParser::TakeServerTimingHeaders() {
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return std::move(mServerTimingHeaders);
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}
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} // namespace net
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} // namespace mozilla
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