nsresult
SpdyStream::ParseHttpRequestHeaders(const char *buf,
PRUint32 avail,
PRUint32 *countUsed)
{
// Returns NS_OK even if the headers are incomplete
// set mSynFrameComplete flag if they are complete
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
NS_ABORT_IF_FALSE(mUpstreamState == GENERATING_SYN_STREAM, "wrong state");
LOG3(("SpdyStream::ParseHttpRequestHeaders %p avail=%d state=%x",
this, avail, mUpstreamState));
mFlatHttpRequestHeaders.Append(buf, avail);
// We can use the simple double crlf because firefox is the
// only client we are parsing
PRInt32 endHeader = mFlatHttpRequestHeaders.Find("\r\n\r\n");
if (endHeader == -1) {
// We don't have all the headers yet
LOG3(("SpdyStream::ParseHttpRequestHeaders %p "
"Need more header bytes. Len = %d",
this, mFlatHttpRequestHeaders.Length()));
*countUsed = avail;
return NS_OK;
}
// We have recvd all the headers, trim the local
// buffer of the final empty line, and set countUsed to reflect
// the whole header has been consumed.
PRUint32 oldLen = mFlatHttpRequestHeaders.Length();
mFlatHttpRequestHeaders.SetLength(endHeader + 2);
*countUsed = avail - (oldLen - endHeader) + 4;
mSynFrameComplete = 1;
// It is now OK to assign a streamID that we are assured will
// be monotonically increasing amongst syn-streams on this
// session
mStreamID = mSession->RegisterStreamID(this);
NS_ABORT_IF_FALSE(mStreamID & 1,
"Spdy Stream Channel ID must be odd");
if (mStreamID >= 0x80000000) {
// streamID must fit in 31 bits. This is theoretically possible
// because stream ID assignment is asynchronous to stream creation
// because of the protocol requirement that the ID in syn-stream
// be monotonically increasing. In reality this is really not possible
// because new streams stop being added to a session with 0x10000000 / 2
// IDs still available and no race condition is going to bridge that gap,
// so we can be comfortable on just erroring out for correctness in that
// case.
LOG3(("Stream assigned out of range ID: 0x%X", mStreamID));
return NS_ERROR_UNEXPECTED;
}
// Now we need to convert the flat http headers into a set
// of SPDY headers.. writing to mTxInlineFrame{sz}
mTxInlineFrame[0] = SpdySession::kFlag_Control;
mTxInlineFrame[1] = 2; /* version */
mTxInlineFrame[2] = 0;
mTxInlineFrame[3] = SpdySession::CONTROL_TYPE_SYN_STREAM;
// 4 to 7 are length and flags, we'll fill that in later
PRUint32 networkOrderID = PR_htonl(mStreamID);
memcpy(mTxInlineFrame + 8, &networkOrderID, 4);
// this is the associated-to field, which is not used sending
// from the client in the http binding
memset (mTxInlineFrame + 12, 0, 4);
// Priority flags are the C0 mask of byte 16.
// From low to high: 00 40 80 C0
// higher raw priority values are actually less important
//
// The other 6 bits of 16 are unused. Spdy/3 will expand
// priority to 4 bits.
//
// When Spdy/3 implements WINDOW_UPDATE the lowest priority
// streams over a threshold (32?) should be given tiny
// receive windows, separate from their spdy priority
//
if (mPriority >= nsISupportsPriority::PRIORITY_LOW)
mTxInlineFrame[16] = SpdySession::kPri00;
else if (mPriority >= nsISupportsPriority::PRIORITY_NORMAL)
mTxInlineFrame[16] = SpdySession::kPri01;
else if (mPriority >= nsISupportsPriority::PRIORITY_HIGH)
mTxInlineFrame[16] = SpdySession::kPri02;
else
mTxInlineFrame[16] = SpdySession::kPri03;
mTxInlineFrame[17] = 0; /* unused */
// nsCString methodHeader;
// mTransaction->RequestHead()->Method()->ToUTF8String(methodHeader);
const char *methodHeader = mTransaction->RequestHead()->Method().get();
nsCString hostHeader;
mTransaction->RequestHead()->GetHeader(nsHttp::Host, hostHeader);
nsCString versionHeader;
if (mTransaction->RequestHead()->Version() == NS_HTTP_VERSION_1_1)
versionHeader = NS_LITERAL_CSTRING("HTTP/1.1");
else
versionHeader = NS_LITERAL_CSTRING("HTTP/1.0");
nsClassHashtable<nsCStringHashKey, nsCString> hdrHash;
// use mRequestHead() to get a sense of how big to make the hash,
// even though we are parsing the actual text stream because
// it is legit to append headers.
hdrHash.Init(1 + (mTransaction->RequestHead()->Headers().Count() * 2));
const char *beginBuffer = mFlatHttpRequestHeaders.BeginReading();
// need to hash all the headers together to remove duplicates, special
// headers, etc..
PRInt32 crlfIndex = mFlatHttpRequestHeaders.Find("\r\n");
while (true) {
PRInt32 startIndex = crlfIndex + 2;
crlfIndex = mFlatHttpRequestHeaders.Find("\r\n", false, startIndex);
if (crlfIndex == -1)
break;
PRInt32 colonIndex = mFlatHttpRequestHeaders.Find(":", false, startIndex,
crlfIndex - startIndex);
if (colonIndex == -1)
break;
nsDependentCSubstring name = Substring(beginBuffer + startIndex,
beginBuffer + colonIndex);
// all header names are lower case in spdy
ToLowerCase(name);
if (name.Equals("method") ||
name.Equals("version") ||
name.Equals("scheme") ||
name.Equals("keep-alive") ||
name.Equals("accept-encoding") ||
name.Equals("te") ||
name.Equals("connection") ||
name.Equals("proxy-connection") ||
name.Equals("url"))
continue;
nsCString *val = hdrHash.Get(name);
if (!val) {
val = new nsCString();
hdrHash.Put(name, val);
}
PRInt32 valueIndex = colonIndex + 1;
while (valueIndex < crlfIndex && beginBuffer[valueIndex] == ' ')
++valueIndex;
nsDependentCSubstring v = Substring(beginBuffer + valueIndex,
beginBuffer + crlfIndex);
if (!val->IsEmpty())
val->Append(static_cast<char>(0));
val->Append(v);
if (name.Equals("content-length")) {
PRInt64 len;
if (nsHttp::ParseInt64(val->get(), nsnull, &len))
mRequestBodyLen = len;
}
}
mTxInlineFrameSize = 18;
LOG3(("http request headers to encode are: \n%s",
mFlatHttpRequestHeaders.get()));
// The header block length
PRUint16 count = hdrHash.Count() + 4; /* method, scheme, url, version */
CompressToFrame(count);
// method, scheme, url, and version headers for request line
CompressToFrame(NS_LITERAL_CSTRING("method"));
CompressToFrame(methodHeader, strlen(methodHeader));
CompressToFrame(NS_LITERAL_CSTRING("scheme"));
CompressToFrame(NS_LITERAL_CSTRING("https"));
CompressToFrame(NS_LITERAL_CSTRING("url"));
CompressToFrame(mTransaction->RequestHead()->RequestURI());
CompressToFrame(NS_LITERAL_CSTRING("version"));
CompressToFrame(versionHeader);
hdrHash.Enumerate(hdrHashEnumerate, this);
CompressFlushFrame();
// 4 to 7 are length and flags, which we can now fill in
(reinterpret_cast<PRUint32 *>(mTxInlineFrame.get()))[1] =
PR_htonl(mTxInlineFrameSize - 8);
NS_ABORT_IF_FALSE(!mTxInlineFrame[4],
"Size greater than 24 bits");
// For methods other than POST and PUT, we will set the fin bit
// right on the syn stream packet.
if (mTransaction->RequestHead()->Method() != nsHttp::Post &&
mTransaction->RequestHead()->Method() != nsHttp::Put) {
mSentFinOnData = 1;
mTxInlineFrame[4] = SpdySession::kFlag_Data_FIN;
}
Telemetry::Accumulate(Telemetry::SPDY_SYN_SIZE, mTxInlineFrameSize - 18);
// The size of the input headers is approximate
PRUint32 ratio =
(mTxInlineFrameSize - 18) * 100 /
(11 + mTransaction->RequestHead()->RequestURI().Length() +
mFlatHttpRequestHeaders.Length());
Telemetry::Accumulate(Telemetry::SPDY_SYN_RATIO, ratio);
return NS_OK;
}
void
SpdyStream::CompressToFrame(const nsACString *str)
{
CompressToFrame(str->BeginReading(), str->Length());
}
void
SpdyStream2::CompressToFrame(const nsACString &str)
{
CompressToFrame(str.BeginReading(), str.Length());
}
