String SecurityPolicy::generateReferrerHeader(ReferrerPolicy referrerPolicy, const URL& url, const String& referrer)
{
if (referrer.isEmpty())
return String();
if (!protocolIsInHTTPFamily(referrer))
return String();
switch (referrerPolicy) {
case ReferrerPolicyNever:
return String();
case ReferrerPolicyAlways:
return referrer;
case ReferrerPolicyOrigin: {
String origin = SecurityOrigin::createFromString(referrer)->toString();
if (origin == "null")
return String();
// A security origin is not a canonical URL as it lacks a path. Add /
// to turn it into a canonical URL we can use as referrer.
return origin + "/";
}
case ReferrerPolicyDefault:
break;
}
return shouldHideReferrer(url, referrer) ? String() : referrer;
}
void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == hrefAttr) {
bool wasLink = isLink();
setIsLink(!value.isNull() && !shouldProhibitLinks(this));
if (wasLink != isLink())
setNeedsStyleRecalc();
if (isLink()) {
String parsedURL = stripLeadingAndTrailingHTMLSpaces(value);
if (document().isDNSPrefetchEnabled()) {
if (protocolIsInHTTPFamily(parsedURL) || parsedURL.startsWith("//"))
prefetchDNS(document().completeURL(parsedURL).host());
}
}
invalidateCachedVisitedLinkHash();
} else if (name == nameAttr || name == titleAttr) {
// Do nothing.
} else if (name == relAttr) {
if (SpaceSplitString::spaceSplitStringContainsValue(value, "noreferrer", true))
m_linkRelations |= RelationNoReferrer;
if (m_relList)
m_relList->updateRelAttribute(value);
}
else
HTMLElement::parseAttribute(name, value);
}
String KURL::strippedForUseAsReferrer() const
{
if (!protocolIsInHTTPFamily())
return String();
if (m_parsed.username.is_nonempty() || m_parsed.password.is_nonempty() || m_parsed.ref.is_valid()) {
KURL referrer(*this);
referrer.setUser(String());
referrer.setPass(String());
referrer.removeFragmentIdentifier();
return referrer.getString();
}
return getString();
}
void HTMLAnchorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
if (name == hrefAttr) {
bool wasLink = isLink();
setIsLink(!value.isNull() && !shouldProhibitLinks(this));
if (wasLink != isLink())
didAffectSelector(AffectedSelectorLink | AffectedSelectorVisited | AffectedSelectorEnabled);
if (isLink()) {
String parsedURL = stripLeadingAndTrailingHTMLSpaces(value);
if (document().isDNSPrefetchEnabled()) {
if (protocolIsInHTTPFamily(parsedURL) || parsedURL.startsWith("//"))
prefetchDNS(document().completeURL(parsedURL).host());
}
}
invalidateCachedVisitedLinkHash();
} else if (name == nameAttr || name == titleAttr) {
// Do nothing.
} else if (name == relAttr)
setRel(value);
else
HTMLElement::parseAttribute(name, value);
}
