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Issue #2258 - Part 1: Support XCTO:nosniff when navigating.

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Moonchild 2025-08-12 16:18:38 +02:00 • committed by roytam1
commit e56e5d6cb1
10 changed files with 103 additions and 5 deletions
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36
netwerk/streamconv/converters/nsUnknownDecoder.cpp
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@ -315,6 +315,12 @@ nsUnknownDecoder::GetMIMETypeFromContent(nsIRequest* aRequest,
uint32_t aLength,
nsACString& type)
{
// Note: This is only used by sniffer, therefore we do not need to lock anything here.
nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return NS_OK;
}
mBuffer = const_cast<char*>(reinterpret_cast<const char*>(aData));
mBufferLen = aLength;
DetermineContentType(aRequest);
@ -345,6 +351,11 @@ bool nsUnknownDecoder::AllowSniffing(nsIRequest* aRequest)
return false;
}
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return false;
}
bool isLocalFile = false;
if (NS_FAILED(uri->SchemeIs("file", &isLocalFile)) || isLocalFile) {
return false;
@ -391,10 +402,17 @@ void nsUnknownDecoder::DetermineContentType(nsIRequest* aRequest)
NS_ASSERTION(mContentType.IsEmpty(), "Content type is already known.");
if (!mContentType.IsEmpty()) return;
nsCOMPtr<nsIHttpChannel> channel(do_QueryInterface(aRequest));
if (channel) {
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return;
}
}
const char* testData = mBuffer;
uint32_t testDataLen = mBufferLen;
// Check if data are compressed.
nsCOMPtr<nsIHttpChannel> channel(do_QueryInterface(aRequest));
if (channel) {
nsresult rv = ConvertEncodedData(aRequest, mBuffer, mBufferLen);
if (NS_SUCCEEDED(rv)) {
@ -561,6 +579,11 @@ bool nsUnknownDecoder::SniffForXML(nsIRequest* aRequest)
bool nsUnknownDecoder::SniffURI(nsIRequest* aRequest)
{
nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return false;
}
nsCOMPtr<nsIMIMEService> mimeService(do_GetService("@mozilla.org/mime;1"));
if (mimeService) {
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
@ -592,6 +615,12 @@ bool nsUnknownDecoder::LastDitchSniff(nsIRequest* aRequest)
// All we can do now is try to guess whether this is text/plain or
// application/octet-stream
nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return false;
}
const char* testData;
uint32_t testDataLen;
if (mDecodedData.IsEmpty()) {
@ -791,6 +820,11 @@ nsBinaryDetector::DetermineContentType(nsIRequest* aRequest)
return;
}
nsCOMPtr<nsILoadInfo> loadInfo = httpChannel->GetLoadInfo();
if (loadInfo->GetSkipContentSniffing()) {
return;
}
// It's an HTTP channel. Check for the text/plain mess
nsAutoCString contentTypeHdr;
httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("Content-Type"),