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gecko/netwerk/protocol/http/nsHttpTransaction.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et cin: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "base/basictypes.h"
#include "nsIOService.h"
#include "nsHttpHandler.h"
#include "nsHttpTransaction.h"
#include "nsHttpConnection.h"
#include "nsHttpRequestHead.h"
#include "nsHttpResponseHead.h"
#include "nsHttpChunkedDecoder.h"
#include "nsTransportUtils.h"
#include "nsNetUtil.h"
#include "nsProxyRelease.h"
#include "nsIOService.h"
#include "nsAtomicRefcnt.h"
#include "nsISeekableStream.h"
#include "nsISocketTransport.h"
#include "nsMultiplexInputStream.h"
#include "nsStringStream.h"
#include "mozilla/VisualEventTracer.h"
#include "nsComponentManagerUtils.h" // do_CreateInstance
#include "nsServiceManagerUtils.h" // do_GetService
#include "nsIHttpActivityObserver.h"
#include "nsSocketTransportService2.h"
#include <algorithm>
using namespace mozilla;
//-----------------------------------------------------------------------------
#ifdef DEBUG
// defined by the socket transport service while active
extern PRThread *gSocketThread;
#endif
//-----------------------------------------------------------------------------
static NS_DEFINE_CID(kMultiplexInputStream, NS_MULTIPLEXINPUTSTREAM_CID);
// Place a limit on how much non-compliant HTTP can be skipped while
// looking for a response header
#define MAX_INVALID_RESPONSE_BODY_SIZE (1024 * 128)
//-----------------------------------------------------------------------------
// helpers
//-----------------------------------------------------------------------------
#if defined(PR_LOGGING)
static void
LogHeaders(const char *lineStart)
{
nsAutoCString buf;
char *endOfLine;
while ((endOfLine = PL_strstr(lineStart, "\r\n"))) {
buf.Assign(lineStart, endOfLine - lineStart);
if (PL_strcasestr(buf.get(), "authorization: ") ||
PL_strcasestr(buf.get(), "proxy-authorization: ")) {
char *p = PL_strchr(PL_strchr(buf.get(), ' ') + 1, ' ');
while (p && *++p)
*p = '*';
}
LOG3((" %s\n", buf.get()));
lineStart = endOfLine + 2;
}
}
#endif
//-----------------------------------------------------------------------------
// nsHttpTransaction <public>
//-----------------------------------------------------------------------------
nsHttpTransaction::nsHttpTransaction()
: mCallbacksLock("transaction mCallbacks lock")
, mRequestSize(0)
, mConnection(nullptr)
, mConnInfo(nullptr)
, mRequestHead(nullptr)
, mResponseHead(nullptr)
, mContentLength(-1)
, mContentRead(0)
, mInvalidResponseBytesRead(0)
, mChunkedDecoder(nullptr)
, mStatus(NS_OK)
, mPriority(0)
, mRestartCount(0)
, mCaps(0)
, mClassification(CLASS_GENERAL)
, mPipelinePosition(0)
, mHttpVersion(NS_HTTP_VERSION_UNKNOWN)
, mClosed(false)
, mConnected(false)
, mHaveStatusLine(false)
, mHaveAllHeaders(false)
, mTransactionDone(false)
, mResponseIsComplete(false)
, mDidContentStart(false)
, mNoContent(false)
, mSentData(false)
, mReceivedData(false)
, mStatusEventPending(false)
, mHasRequestBody(false)
, mProxyConnectFailed(false)
, mHttpResponseMatched(false)
, mPreserveStream(false)
, mDispatchedAsBlocking(false)
, mReportedStart(false)
, mReportedResponseHeader(false)
, mForTakeResponseHead(nullptr)
, mResponseHeadTaken(false)
, mSubmittedRatePacing(false)
, mPassedRatePacing(false)
, mSynchronousRatePaceRequest(false)
{
LOG(("Creating nsHttpTransaction @%x\n", this));
gHttpHandler->GetMaxPipelineObjectSize(&mMaxPipelineObjectSize);
}
nsHttpTransaction::~nsHttpTransaction()
{
LOG(("Destroying nsHttpTransaction @%x\n", this));
if (mTokenBucketCancel) {
mTokenBucketCancel->Cancel(NS_ERROR_ABORT);
mTokenBucketCancel = nullptr;
}
// Force the callbacks to be released right now
mCallbacks = nullptr;
NS_IF_RELEASE(mConnection);
NS_IF_RELEASE(mConnInfo);
delete mResponseHead;
delete mForTakeResponseHead;
delete mChunkedDecoder;
ReleaseBlockingTransaction();
}
nsHttpTransaction::Classifier
nsHttpTransaction::Classify()
{
if (!(mCaps & NS_HTTP_ALLOW_PIPELINING))
return (mClassification = CLASS_SOLO);
if (mRequestHead->PeekHeader(nsHttp::If_Modified_Since) ||
mRequestHead->PeekHeader(nsHttp::If_None_Match))
return (mClassification = CLASS_REVALIDATION);
const char *accept = mRequestHead->PeekHeader(nsHttp::Accept);
if (accept && !PL_strncmp(accept, "image/", 6))
return (mClassification = CLASS_IMAGE);
if (accept && !PL_strncmp(accept, "text/css", 8))
return (mClassification = CLASS_SCRIPT);
mClassification = CLASS_GENERAL;
int32_t queryPos = mRequestHead->RequestURI().FindChar('?');
if (queryPos == kNotFound) {
if (StringEndsWith(mRequestHead->RequestURI(),
NS_LITERAL_CSTRING(".js")))
mClassification = CLASS_SCRIPT;
}
else if (queryPos >= 3 &&
Substring(mRequestHead->RequestURI(), queryPos - 3, 3).
EqualsLiteral(".js")) {
mClassification = CLASS_SCRIPT;
}
return mClassification;
}
nsresult
nsHttpTransaction::Init(uint32_t caps,
nsHttpConnectionInfo *cinfo,
nsHttpRequestHead *requestHead,
nsIInputStream *requestBody,
bool requestBodyHasHeaders,
nsIEventTarget *target,
nsIInterfaceRequestor *callbacks,
nsITransportEventSink *eventsink,
nsIAsyncInputStream **responseBody)
{
MOZ_EVENT_TRACER_COMPOUND_NAME(static_cast<nsAHttpTransaction*>(this),
requestHead->PeekHeader(nsHttp::Host),
requestHead->RequestURI().BeginReading());
MOZ_EVENT_TRACER_WAIT(static_cast<nsAHttpTransaction*>(this),
"net::http::transaction");
nsresult rv;
LOG(("nsHttpTransaction::Init [this=%x caps=%x]\n", this, caps));
NS_ASSERTION(cinfo, "ouch");
NS_ASSERTION(requestHead, "ouch");
NS_ASSERTION(target, "ouch");
mActivityDistributor = do_GetService(NS_HTTPACTIVITYDISTRIBUTOR_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
bool activityDistributorActive;
rv = mActivityDistributor->GetIsActive(&activityDistributorActive);
if (NS_SUCCEEDED(rv) && activityDistributorActive) {
// there are some observers registered at activity distributor, gather
// nsISupports for the channel that called Init()
mChannel = do_QueryInterface(eventsink);
LOG(("nsHttpTransaction::Init() " \
"mActivityDistributor is active " \
"this=%x", this));
} else {
// there is no observer, so don't use it
activityDistributorActive = false;
mActivityDistributor = nullptr;
}
// create transport event sink proxy. it coalesces all events if and only
// if the activity observer is not active. when the observer is active
// we need not to coalesce any events to get all expected notifications
// of the transaction state, necessary for correct debugging and logging.
rv = net_NewTransportEventSinkProxy(getter_AddRefs(mTransportSink),
eventsink, target,
!activityDistributorActive);
if (NS_FAILED(rv)) return rv;
NS_ADDREF(mConnInfo = cinfo);
mCallbacks = callbacks;
mConsumerTarget = target;
mCaps = caps;
if (requestHead->Method() == nsHttp::Head)
mNoContent = true;
// Make sure that there is "Content-Length: 0" header in the requestHead
// in case of POST and PUT methods when there is no requestBody and
// requestHead doesn't contain "Transfer-Encoding" header.
//
// RFC1945 section 7.2.2:
// HTTP/1.0 requests containing an entity body must include a valid
// Content-Length header field.
//
// RFC2616 section 4.4:
// For compatibility with HTTP/1.0 applications, HTTP/1.1 requests
// containing a message-body MUST include a valid Content-Length header
// field unless the server is known to be HTTP/1.1 compliant.
if ((requestHead->Method() == nsHttp::Post || requestHead->Method() == nsHttp::Put) &&
!requestBody && !requestHead->PeekHeader(nsHttp::Transfer_Encoding)) {
requestHead->SetHeader(nsHttp::Content_Length, NS_LITERAL_CSTRING("0"));
}
// grab a weak reference to the request head
mRequestHead = requestHead;
// make sure we eliminate any proxy specific headers from
// the request if we are using CONNECT
bool pruneProxyHeaders = cinfo->UsingConnect();
mReqHeaderBuf.Truncate();
requestHead->Flatten(mReqHeaderBuf, pruneProxyHeaders);
#if defined(PR_LOGGING)
if (LOG3_ENABLED()) {
LOG3(("http request [\n"));
LogHeaders(mReqHeaderBuf.get());
LOG3(("]\n"));
}
#endif
// If the request body does not include headers or if there is no request
// body, then we must add the header/body separator manually.
if (!requestBodyHasHeaders || !requestBody)
mReqHeaderBuf.AppendLiteral("\r\n");
// report the request header
if (mActivityDistributor)
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_REQUEST_HEADER,
PR_Now(), 0,
mReqHeaderBuf);
// Create a string stream for the request header buf (the stream holds
// a non-owning reference to the request header data, so we MUST keep
// mReqHeaderBuf around).
nsCOMPtr<nsIInputStream> headers;
rv = NS_NewByteInputStream(getter_AddRefs(headers),
mReqHeaderBuf.get(),
mReqHeaderBuf.Length());
if (NS_FAILED(rv)) return rv;
if (requestBody) {
mHasRequestBody = true;
// wrap the headers and request body in a multiplexed input stream.
nsCOMPtr<nsIMultiplexInputStream> multi =
do_CreateInstance(kMultiplexInputStream, &rv);
if (NS_FAILED(rv)) return rv;
rv = multi->AppendStream(headers);
if (NS_FAILED(rv)) return rv;
rv = multi->AppendStream(requestBody);
if (NS_FAILED(rv)) return rv;
// wrap the multiplexed input stream with a buffered input stream, so
// that we write data in the largest chunks possible. this is actually
// necessary to workaround some common server bugs (see bug 137155).
rv = NS_NewBufferedInputStream(getter_AddRefs(mRequestStream), multi,
nsIOService::gDefaultSegmentSize);
if (NS_FAILED(rv)) return rv;
}
else
mRequestStream = headers;
rv = mRequestStream->Available(&mRequestSize);
if (NS_FAILED(rv)) return rv;
// create pipe for response stream
rv = NS_NewPipe2(getter_AddRefs(mPipeIn),
getter_AddRefs(mPipeOut),
true, true,
nsIOService::gDefaultSegmentSize,
nsIOService::gDefaultSegmentCount);
if (NS_FAILED(rv)) return rv;
Classify();
NS_ADDREF(*responseBody = mPipeIn);
return NS_OK;
}
nsAHttpConnection *
nsHttpTransaction::Connection()
{
return mConnection;
}
nsHttpResponseHead *
nsHttpTransaction::TakeResponseHead()
{
NS_ABORT_IF_FALSE(!mResponseHeadTaken, "TakeResponseHead called 2x");
// Lock RestartInProgress() and TakeResponseHead() against main thread
MutexAutoLock lock(*nsHttp::GetLock());
mResponseHeadTaken = true;
// Prefer mForTakeResponseHead over mResponseHead. It is always a complete
// set of headers.
nsHttpResponseHead *head;
if (mForTakeResponseHead) {
head = mForTakeResponseHead;
mForTakeResponseHead = nullptr;
return head;
}
// Even in OnStartRequest() the headers won't be available if we were
// canceled
if (!mHaveAllHeaders) {
NS_WARNING("response headers not available or incomplete");
return nullptr;
}
head = mResponseHead;
mResponseHead = nullptr;
return head;
}
void
nsHttpTransaction::SetProxyConnectFailed()
{
mProxyConnectFailed = true;
}
nsHttpRequestHead *
nsHttpTransaction::RequestHead()
{
return mRequestHead;
}
uint32_t
nsHttpTransaction::Http1xTransactionCount()
{
return 1;
}
nsresult
nsHttpTransaction::TakeSubTransactions(
nsTArray<nsRefPtr<nsAHttpTransaction> > &outTransactions)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
//----------------------------------------------------------------------------
// nsHttpTransaction::nsAHttpTransaction
//----------------------------------------------------------------------------
void
nsHttpTransaction::SetConnection(nsAHttpConnection *conn)
{
NS_IF_RELEASE(mConnection);
NS_IF_ADDREF(mConnection = conn);
if (conn) {
MOZ_EVENT_TRACER_EXEC(static_cast<nsAHttpTransaction*>(this),
"net::http::transaction");
}
}
void
nsHttpTransaction::GetSecurityCallbacks(nsIInterfaceRequestor **cb)
{
MutexAutoLock lock(mCallbacksLock);
NS_IF_ADDREF(*cb = mCallbacks);
}
void
nsHttpTransaction::SetSecurityCallbacks(nsIInterfaceRequestor* aCallbacks)
{
{
MutexAutoLock lock(mCallbacksLock);
mCallbacks = aCallbacks;
}
if (gSocketTransportService) {
nsRefPtr<UpdateSecurityCallbacks> event = new UpdateSecurityCallbacks(this, aCallbacks);
gSocketTransportService->Dispatch(event, nsIEventTarget::DISPATCH_NORMAL);
}
}
void
nsHttpTransaction::OnTransportStatus(nsITransport* transport,
nsresult status, uint64_t progress)
{
LOG(("nsHttpTransaction::OnSocketStatus [this=%x status=%x progress=%llu]\n",
this, status, progress));
if (TimingEnabled()) {
if (status == NS_NET_STATUS_RESOLVING_HOST) {
mTimings.domainLookupStart = TimeStamp::Now();
} else if (status == NS_NET_STATUS_RESOLVED_HOST) {
mTimings.domainLookupEnd = TimeStamp::Now();
} else if (status == NS_NET_STATUS_CONNECTING_TO) {
mTimings.connectStart = TimeStamp::Now();
} else if (status == NS_NET_STATUS_CONNECTED_TO) {
mTimings.connectEnd = TimeStamp::Now();
}
}
if (!mTransportSink)
return;
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
// Need to do this before the STATUS_RECEIVING_FROM check below, to make
// sure that the activity distributor gets told about all status events.
if (mActivityDistributor) {
// upon STATUS_WAITING_FOR; report request body sent
if ((mHasRequestBody) &&
(status == NS_NET_STATUS_WAITING_FOR))
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_REQUEST_BODY_SENT,
PR_Now(), 0, EmptyCString());
// report the status and progress
if (!mRestartInProgressVerifier.IsDiscardingContent())
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_SOCKET_TRANSPORT,
static_cast<uint32_t>(status),
PR_Now(),
progress,
EmptyCString());
}
// nsHttpChannel synthesizes progress events in OnDataAvailable
if (status == NS_NET_STATUS_RECEIVING_FROM)
return;
uint64_t progressMax;
if (status == NS_NET_STATUS_SENDING_TO) {
// suppress progress when only writing request headers
if (!mHasRequestBody)
return;
nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mRequestStream);
NS_ASSERTION(seekable, "Request stream isn't seekable?!?");
int64_t prog = 0;
seekable->Tell(&prog);
progress = prog;
// when uploading, we include the request headers in the progress
// notifications.
progressMax = mRequestSize; // XXX mRequestSize is 32-bit!
}
else {
progress = 0;
progressMax = 0;
}
mTransportSink->OnTransportStatus(transport, status, progress, progressMax);
}
bool
nsHttpTransaction::IsDone()
{
return mTransactionDone;
}
nsresult
nsHttpTransaction::Status()
{
return mStatus;
}
uint32_t
nsHttpTransaction::Caps()
{
return mCaps;
}
uint64_t
nsHttpTransaction::Available()
{
uint64_t size;
if (NS_FAILED(mRequestStream->Available(&size)))
size = 0;
return size;
}
NS_METHOD
nsHttpTransaction::ReadRequestSegment(nsIInputStream *stream,
void *closure,
const char *buf,
uint32_t offset,
uint32_t count,
uint32_t *countRead)
{
nsHttpTransaction *trans = (nsHttpTransaction *) closure;
nsresult rv = trans->mReader->OnReadSegment(buf, count, countRead);
if (NS_FAILED(rv)) return rv;
if (trans->TimingEnabled() && trans->mTimings.requestStart.IsNull()) {
// First data we're sending -> this is requestStart
trans->mTimings.requestStart = TimeStamp::Now();
}
if (!trans->mSentData) {
MOZ_EVENT_TRACER_MARK(static_cast<nsAHttpTransaction*>(trans),
"net::http::first-write");
}
trans->mSentData = true;
return NS_OK;
}
nsresult
nsHttpTransaction::ReadSegments(nsAHttpSegmentReader *reader,
uint32_t count, uint32_t *countRead)
{
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mTransactionDone) {
*countRead = 0;
return mStatus;
}
if (!mConnected) {
mConnected = true;
mConnection->GetSecurityInfo(getter_AddRefs(mSecurityInfo));
}
mReader = reader;
nsresult rv = mRequestStream->ReadSegments(ReadRequestSegment, this, count, countRead);
mReader = nullptr;
// if read would block then we need to AsyncWait on the request stream.
// have callback occur on socket thread so we stay synchronized.
if (rv == NS_BASE_STREAM_WOULD_BLOCK) {
nsCOMPtr<nsIAsyncInputStream> asyncIn =
do_QueryInterface(mRequestStream);
if (asyncIn) {
nsCOMPtr<nsIEventTarget> target;
gHttpHandler->GetSocketThreadTarget(getter_AddRefs(target));
if (target)
asyncIn->AsyncWait(this, 0, 0, target);
else {
NS_ERROR("no socket thread event target");
rv = NS_ERROR_UNEXPECTED;
}
}
}
return rv;
}
NS_METHOD
nsHttpTransaction::WritePipeSegment(nsIOutputStream *stream,
void *closure,
char *buf,
uint32_t offset,
uint32_t count,
uint32_t *countWritten)
{
nsHttpTransaction *trans = (nsHttpTransaction *) closure;
if (trans->mTransactionDone)
return NS_BASE_STREAM_CLOSED; // stop iterating
if (trans->TimingEnabled() && trans->mTimings.responseStart.IsNull()) {
trans->mTimings.responseStart = TimeStamp::Now();
}
nsresult rv;
//
// OK, now let the caller fill this segment with data.
//
rv = trans->mWriter->OnWriteSegment(buf, count, countWritten);
if (NS_FAILED(rv)) return rv; // caller didn't want to write anything
if (!trans->mReceivedData) {
MOZ_EVENT_TRACER_MARK(static_cast<nsAHttpTransaction*>(trans),
"net::http::first-read");
}
NS_ASSERTION(*countWritten > 0, "bad writer");
trans->mReceivedData = true;
// Let the transaction "play" with the buffer. It is free to modify
// the contents of the buffer and/or modify countWritten.
// - Bytes in HTTP headers don't count towards countWritten, so the input
// side of pipe (aka nsHttpChannel's mTransactionPump) won't hit
// OnInputStreamReady until all headers have been parsed.
//
rv = trans->ProcessData(buf, *countWritten, countWritten);
if (NS_FAILED(rv))
trans->Close(rv);
return rv; // failure code only stops WriteSegments; it is not propagated.
}
nsresult
nsHttpTransaction::WriteSegments(nsAHttpSegmentWriter *writer,
uint32_t count, uint32_t *countWritten)
{
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mTransactionDone)
return NS_SUCCEEDED(mStatus) ? NS_BASE_STREAM_CLOSED : mStatus;
mWriter = writer;
nsresult rv = mPipeOut->WriteSegments(WritePipeSegment, this, count, countWritten);
mWriter = nullptr;
// if pipe would block then we need to AsyncWait on it. have callback
// occur on socket thread so we stay synchronized.
if (rv == NS_BASE_STREAM_WOULD_BLOCK) {
nsCOMPtr<nsIEventTarget> target;
gHttpHandler->GetSocketThreadTarget(getter_AddRefs(target));
if (target)
mPipeOut->AsyncWait(this, 0, 0, target);
else {
NS_ERROR("no socket thread event target");
rv = NS_ERROR_UNEXPECTED;
}
}
return rv;
}
void
nsHttpTransaction::Close(nsresult reason)
{
LOG(("nsHttpTransaction::Close [this=%x reason=%x]\n", this, reason));
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mClosed) {
LOG((" already closed\n"));
return;
}
if (mTokenBucketCancel) {
mTokenBucketCancel->Cancel(reason);
mTokenBucketCancel = nullptr;
}
if (mActivityDistributor) {
// report the reponse is complete if not already reported
if (!mResponseIsComplete)
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_COMPLETE,
PR_Now(),
static_cast<uint64_t>(mContentRead),
EmptyCString());
// report that this transaction is closing
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_TRANSACTION_CLOSE,
PR_Now(), 0, EmptyCString());
}
// we must no longer reference the connection! find out if the
// connection was being reused before letting it go.
bool connReused = false;
if (mConnection)
connReused = mConnection->IsReused();
mConnected = false;
//
// if the connection was reset or closed before we wrote any part of the
// request or if we wrote the request but didn't receive any part of the
// response and the connection was being reused, then we can (and really
// should) assume that we wrote to a stale connection and we must therefore
// repeat the request over a new connection.
//
// NOTE: the conditions under which we will automatically retry the HTTP
// request have to be carefully selected to avoid duplication of the
// request from the point-of-view of the server. such duplication could
// have dire consequences including repeated purchases, etc.
//
// NOTE: because of the way SSL proxy CONNECT is implemented, it is
// possible that the transaction may have received data without having
// sent any data. for this reason, mSendData == FALSE does not imply
// mReceivedData == FALSE. (see bug 203057 for more info.)
//
if (reason == NS_ERROR_NET_RESET || reason == NS_OK) {
// reallySentData is meant to separate the instances where data has
// been sent by this transaction but buffered at a higher level while
// a TLS session (perhaps via a tunnel) is setup.
bool reallySentData =
mSentData && (!mConnection || mConnection->BytesWritten());
if (!mReceivedData &&
(!reallySentData || connReused || mPipelinePosition)) {
// if restarting fails, then we must proceed to close the pipe,
// which will notify the channel that the transaction failed.
if (mPipelinePosition) {
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::RedCanceledPipeline,
nullptr, 0);
}
if (NS_SUCCEEDED(Restart()))
return;
}
else if (!mResponseIsComplete && mPipelinePosition &&
reason == NS_ERROR_NET_RESET) {
// due to unhandled rst on a pipeline - safe to
// restart as only idempotent is found there
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::RedCorruptedContent, nullptr, 0);
if (NS_SUCCEEDED(RestartInProgress()))
return;
}
}
bool relConn = true;
if (NS_SUCCEEDED(reason)) {
if (!mResponseIsComplete) {
// The response has not been delimited with a high-confidence
// algorithm like Content-Length or Chunked Encoding. We
// need to use a strong framing mechanism to pipeline.
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::BadInsufficientFraming,
nullptr, mClassification);
}
else if (mPipelinePosition) {
// report this success as feedback
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::GoodCompletedOK,
nullptr, mPipelinePosition);
}
// the server has not sent the final \r\n terminating the header
// section, and there may still be a header line unparsed. let's make
// sure we parse the remaining header line, and then hopefully, the
// response will be usable (see bug 88792).
if (!mHaveAllHeaders) {
char data = '\n';
uint32_t unused;
ParseHead(&data, 1, &unused);
if (mResponseHead->Version() == NS_HTTP_VERSION_0_9) {
// Reject 0 byte HTTP/0.9 Responses - bug 423506
LOG(("nsHttpTransaction::Close %p 0 Byte 0.9 Response", this));
reason = NS_ERROR_NET_RESET;
}
}
// honor the sticky connection flag...
if (mCaps & NS_HTTP_STICKY_CONNECTION)
relConn = false;
}
// mTimings.responseEnd is normally recorded based on the end of a
// HTTP delimiter such as chunked-encodings or content-length. However,
// EOF or an error still require an end time be recorded.
if (TimingEnabled() &&
mTimings.responseEnd.IsNull() && !mTimings.responseStart.IsNull())
mTimings.responseEnd = TimeStamp::Now();
if (relConn && mConnection)
NS_RELEASE(mConnection);
mStatus = reason;
mTransactionDone = true; // forcibly flag the transaction as complete
mClosed = true;
ReleaseBlockingTransaction();
// release some resources that we no longer need
mRequestStream = nullptr;
mReqHeaderBuf.Truncate();
mLineBuf.Truncate();
if (mChunkedDecoder) {
delete mChunkedDecoder;
mChunkedDecoder = nullptr;
}
// closing this pipe triggers the channel's OnStopRequest method.
mPipeOut->CloseWithStatus(reason);
MOZ_EVENT_TRACER_DONE(static_cast<nsAHttpTransaction*>(this),
"net::http::transaction");
}
nsresult
nsHttpTransaction::AddTransaction(nsAHttpTransaction *trans)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
uint32_t
nsHttpTransaction::PipelineDepth()
{
return IsDone() ? 0 : 1;
}
nsresult
nsHttpTransaction::SetPipelinePosition(int32_t position)
{
mPipelinePosition = position;
return NS_OK;
}
int32_t
nsHttpTransaction::PipelinePosition()
{
return mPipelinePosition;
}
//-----------------------------------------------------------------------------
// nsHttpTransaction <private>
//-----------------------------------------------------------------------------
nsresult
nsHttpTransaction::RestartInProgress()
{
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if ((mRestartCount + 1) >= gHttpHandler->MaxRequestAttempts()) {
LOG(("nsHttpTransaction::RestartInProgress() "
"reached max request attempts, failing transaction %p\n", this));
return NS_ERROR_NET_RESET;
}
// Lock RestartInProgress() and TakeResponseHead() against main thread
MutexAutoLock lock(*nsHttp::GetLock());
// Don't try and RestartInProgress() things that haven't gotten a response
// header yet. Those should be handled under the normal restart() path if
// they are eligible.
if (!mHaveAllHeaders)
return NS_ERROR_NET_RESET;
// don't try and restart 0.9 or non 200/Get HTTP/1
if (!mRestartInProgressVerifier.IsSetup())
return NS_ERROR_NET_RESET;
LOG(("Will restart transaction %p and skip first %lld bytes, "
"old Content-Length %lld",
this, mContentRead, mContentLength));
mRestartInProgressVerifier.SetAlreadyProcessed(
std::max(mRestartInProgressVerifier.AlreadyProcessed(), mContentRead));
if (!mResponseHeadTaken && !mForTakeResponseHead) {
// TakeResponseHeader() has not been called yet and this
// is the first restart. Store the resp headers exclusively
// for TakeResponseHead() which is called from the main thread and
// could happen at any time - so we can't continue to modify those
// headers (which restarting will effectively do)
mForTakeResponseHead = mResponseHead;
mResponseHead = nullptr;
}
if (mResponseHead) {
mResponseHead->Reset();
}
mContentRead = 0;
mContentLength = -1;
delete mChunkedDecoder;
mChunkedDecoder = nullptr;
mHaveStatusLine = false;
mHaveAllHeaders = false;
mHttpResponseMatched = false;
mResponseIsComplete = false;
mDidContentStart = false;
mNoContent = false;
mSentData = false;
mReceivedData = false;
return Restart();
}
nsresult
nsHttpTransaction::Restart()
{
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
// limit the number of restart attempts - bug 92224
if (++mRestartCount >= gHttpHandler->MaxRequestAttempts()) {
LOG(("reached max request attempts, failing transaction @%x\n", this));
return NS_ERROR_NET_RESET;
}
LOG(("restarting transaction @%x\n", this));
// rewind streams in case we already wrote out the request
nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mRequestStream);
if (seekable)
seekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);
// clear old connection state...
mSecurityInfo = 0;
NS_IF_RELEASE(mConnection);
// disable pipelining for the next attempt in case pipelining caused the
// reset. this is being overly cautious since we don't know if pipelining
// was the problem here.
mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
SetPipelinePosition(0);
return gHttpHandler->InitiateTransaction(this, mPriority);
}
char *
nsHttpTransaction::LocateHttpStart(char *buf, uint32_t len,
bool aAllowPartialMatch)
{
NS_ASSERTION(!aAllowPartialMatch || mLineBuf.IsEmpty(), "ouch");
static const char HTTPHeader[] = "HTTP/1.";
static const uint32_t HTTPHeaderLen = sizeof(HTTPHeader) - 1;
static const char HTTP2Header[] = "HTTP/2.0";
static const uint32_t HTTP2HeaderLen = sizeof(HTTP2Header) - 1;
if (aAllowPartialMatch && (len < HTTPHeaderLen))
return (PL_strncasecmp(buf, HTTPHeader, len) == 0) ? buf : nullptr;
// mLineBuf can contain partial match from previous search
if (!mLineBuf.IsEmpty()) {
NS_ASSERTION(mLineBuf.Length() < HTTPHeaderLen, "ouch");
int32_t checkChars = std::min(len, HTTPHeaderLen - mLineBuf.Length());
if (PL_strncasecmp(buf, HTTPHeader + mLineBuf.Length(),
checkChars) == 0) {
mLineBuf.Append(buf, checkChars);
if (mLineBuf.Length() == HTTPHeaderLen) {
// We've found whole HTTPHeader sequence. Return pointer at the
// end of matched sequence since it is stored in mLineBuf.
return (buf + checkChars);
}
// Response matches pattern but is still incomplete.
return 0;
}
// Previous partial match together with new data doesn't match the
// pattern. Start the search again.
mLineBuf.Truncate();
}
bool firstByte = true;
while (len > 0) {
if (PL_strncasecmp(buf, HTTPHeader, std::min<uint32_t>(len, HTTPHeaderLen)) == 0) {
if (len < HTTPHeaderLen) {
// partial HTTPHeader sequence found
// save partial match to mLineBuf
mLineBuf.Assign(buf, len);
return 0;
}
// whole HTTPHeader sequence found
return buf;
}
// At least "SmarterTools/2.0.3974.16813" generates nonsensical
// HTTP/2.0 responses to our HTTP/1 requests. Treat the minimal case of
// it as HTTP/1.1 to be compatible with old versions of ourselves and
// other browsers
if (firstByte && !mInvalidResponseBytesRead && len >= HTTP2HeaderLen &&
(PL_strncasecmp(buf, HTTP2Header, HTTP2HeaderLen) == 0)) {
LOG(("nsHttpTransaction:: Identified HTTP/2.0 treating as 1.x\n"));
return buf;
}
if (!nsCRT::IsAsciiSpace(*buf))
firstByte = false;
buf++;
len--;
}
return 0;
}
nsresult
nsHttpTransaction::ParseLine(char *line)
{
LOG(("nsHttpTransaction::ParseLine [%s]\n", line));
nsresult rv = NS_OK;
if (!mHaveStatusLine) {
mResponseHead->ParseStatusLine(line);
mHaveStatusLine = true;
// XXX this should probably never happen
if (mResponseHead->Version() == NS_HTTP_VERSION_0_9)
mHaveAllHeaders = true;
}
else {
rv = mResponseHead->ParseHeaderLine(line);
}
return rv;
}
nsresult
nsHttpTransaction::ParseLineSegment(char *segment, uint32_t len)
{
NS_PRECONDITION(!mHaveAllHeaders, "already have all headers");
if (!mLineBuf.IsEmpty() && mLineBuf.Last() == '\n') {
// trim off the new line char, and if this segment is
// not a continuation of the previous or if we haven't
// parsed the status line yet, then parse the contents
// of mLineBuf.
mLineBuf.Truncate(mLineBuf.Length() - 1);
if (!mHaveStatusLine || (*segment != ' ' && *segment != '\t')) {
nsresult rv = ParseLine(mLineBuf.BeginWriting());
mLineBuf.Truncate();
if (NS_FAILED(rv)) {
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::RedCorruptedContent,
nullptr, 0);
return rv;
}
}
}
// append segment to mLineBuf...
mLineBuf.Append(segment, len);
// a line buf with only a new line char signifies the end of headers.
if (mLineBuf.First() == '\n') {
mLineBuf.Truncate();
// discard this response if it is a 100 continue or other 1xx status.
uint16_t status = mResponseHead->Status();
if ((status != 101) && (status / 100 == 1)) {
LOG(("ignoring 1xx response\n"));
mHaveStatusLine = false;
mHttpResponseMatched = false;
mConnection->SetLastTransactionExpectedNoContent(true);
mResponseHead->Reset();
return NS_OK;
}
mHaveAllHeaders = true;
}
return NS_OK;
}
nsresult
nsHttpTransaction::ParseHead(char *buf,
uint32_t count,
uint32_t *countRead)
{
nsresult rv;
uint32_t len;
char *eol;
LOG(("nsHttpTransaction::ParseHead [count=%u]\n", count));
*countRead = 0;
NS_PRECONDITION(!mHaveAllHeaders, "oops");
// allocate the response head object if necessary
if (!mResponseHead) {
mResponseHead = new nsHttpResponseHead();
if (!mResponseHead)
return NS_ERROR_OUT_OF_MEMORY;
// report that we have a least some of the response
if (mActivityDistributor && !mReportedStart) {
mReportedStart = true;
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_START,
PR_Now(), 0, EmptyCString());
}
}
if (!mHttpResponseMatched) {
// Normally we insist on seeing HTTP/1.x in the first few bytes,
// but if we are on a persistent connection and the previous transaction
// was not supposed to have any content then we need to be prepared
// to skip over a response body that the server may have sent even
// though it wasn't allowed.
if (!mConnection || !mConnection->LastTransactionExpectedNoContent()) {
// tolerate only minor junk before the status line
mHttpResponseMatched = true;
char *p = LocateHttpStart(buf, std::min<uint32_t>(count, 11), true);
if (!p) {
// Treat any 0.9 style response of a put as a failure.
if (mRequestHead->Method() == nsHttp::Put)
return NS_ERROR_ABORT;
mResponseHead->ParseStatusLine("");
mHaveStatusLine = true;
mHaveAllHeaders = true;
return NS_OK;
}
if (p > buf) {
// skip over the junk
mInvalidResponseBytesRead += p - buf;
*countRead = p - buf;
buf = p;
}
}
else {
char *p = LocateHttpStart(buf, count, false);
if (p) {
mInvalidResponseBytesRead += p - buf;
*countRead = p - buf;
buf = p;
mHttpResponseMatched = true;
} else {
mInvalidResponseBytesRead += count;
*countRead = count;
if (mInvalidResponseBytesRead > MAX_INVALID_RESPONSE_BODY_SIZE) {
LOG(("nsHttpTransaction::ParseHead() "
"Cannot find Response Header\n"));
// cannot go back and call this 0.9 anymore as we
// have thrown away a lot of the leading junk
return NS_ERROR_ABORT;
}
return NS_OK;
}
}
}
// otherwise we can assume that we don't have a HTTP/0.9 response.
NS_ABORT_IF_FALSE (mHttpResponseMatched, "inconsistent");
while ((eol = static_cast<char *>(memchr(buf, '\n', count - *countRead))) != nullptr) {
// found line in range [buf:eol]
len = eol - buf + 1;
*countRead += len;
// actually, the line is in the range [buf:eol-1]
if ((eol > buf) && (*(eol-1) == '\r'))
len--;
buf[len-1] = '\n';
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
if (mHaveAllHeaders)
return NS_OK;
// skip over line
buf = eol + 1;
if (!mHttpResponseMatched) {
// a 100 class response has caused us to throw away that set of
// response headers and look for the next response
return NS_ERROR_NET_INTERRUPT;
}
}
// do something about a partial header line
if (!mHaveAllHeaders && (len = count - *countRead)) {
*countRead = count;
// ignore a trailing carriage return, and don't bother calling
// ParseLineSegment if buf only contains a carriage return.
if ((buf[len-1] == '\r') && (--len == 0))
return NS_OK;
rv = ParseLineSegment(buf, len);
if (NS_FAILED(rv))
return rv;
}
return NS_OK;
}
// called on the socket thread
nsresult
nsHttpTransaction::HandleContentStart()
{
LOG(("nsHttpTransaction::HandleContentStart [this=%x]\n", this));
if (mResponseHead) {
#if defined(PR_LOGGING)
if (LOG3_ENABLED()) {
LOG3(("http response [\n"));
nsAutoCString headers;
mResponseHead->Flatten(headers, false);
LogHeaders(headers.get());
LOG3(("]\n"));
}
#endif
// Save http version, mResponseHead isn't available anymore after
// TakeResponseHead() is called
mHttpVersion = mResponseHead->Version();
// notify the connection, give it a chance to cause a reset.
bool reset = false;
if (!mRestartInProgressVerifier.IsSetup())
mConnection->OnHeadersAvailable(this, mRequestHead, mResponseHead, &reset);
// looks like we should ignore this response, resetting...
if (reset) {
LOG(("resetting transaction's response head\n"));
mHaveAllHeaders = false;
mHaveStatusLine = false;
mReceivedData = false;
mSentData = false;
mHttpResponseMatched = false;
mResponseHead->Reset();
// wait to be called again...
return NS_OK;
}
// check if this is a no-content response
switch (mResponseHead->Status()) {
case 101:
mPreserveStream = true; // fall through to other no content
case 204:
case 205:
case 304:
mNoContent = true;
LOG(("this response should not contain a body.\n"));
break;
}
if (mResponseHead->Status() == 200 &&
mConnection->IsProxyConnectInProgress()) {
// successful CONNECTs do not have response bodies
mNoContent = true;
}
mConnection->SetLastTransactionExpectedNoContent(mNoContent);
if (mInvalidResponseBytesRead)
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo, nsHttpConnectionMgr::BadInsufficientFraming,
nullptr, mClassification);
if (mNoContent)
mContentLength = 0;
else {
// grab the content-length from the response headers
mContentLength = mResponseHead->ContentLength();
if ((mClassification != CLASS_SOLO) &&
(mContentLength > mMaxPipelineObjectSize))
CancelPipeline(nsHttpConnectionMgr::BadUnexpectedLarge);
// handle chunked encoding here, so we'll know immediately when
// we're done with the socket. please note that _all_ other
// decoding is done when the channel receives the content data
// so as not to block the socket transport thread too much.
// ignore chunked responses from HTTP/1.0 servers and proxies.
if (mResponseHead->Version() >= NS_HTTP_VERSION_1_1 &&
mResponseHead->HasHeaderValue(nsHttp::Transfer_Encoding, "chunked")) {
// we only support the "chunked" transfer encoding right now.
mChunkedDecoder = new nsHttpChunkedDecoder();
if (!mChunkedDecoder)
return NS_ERROR_OUT_OF_MEMORY;
LOG(("chunked decoder created\n"));
// Ignore server specified Content-Length.
mContentLength = -1;
}
#if defined(PR_LOGGING)
else if (mContentLength == int64_t(-1))
LOG(("waiting for the server to close the connection.\n"));
#endif
}
if (mRestartInProgressVerifier.IsSetup() &&
!mRestartInProgressVerifier.Verify(mContentLength, mResponseHead)) {
LOG(("Restart in progress subsequent transaction failed to match"));
return NS_ERROR_ABORT;
}
}
mDidContentStart = true;
// The verifier only initializes itself once (from the first iteration of
// a transaction that gets far enough to have response headers)
if (mRequestHead->Method() == nsHttp::Get)
mRestartInProgressVerifier.Set(mContentLength, mResponseHead);
return NS_OK;
}
// called on the socket thread
nsresult
nsHttpTransaction::HandleContent(char *buf,
uint32_t count,
uint32_t *contentRead,
uint32_t *contentRemaining)
{
nsresult rv;
LOG(("nsHttpTransaction::HandleContent [this=%x count=%u]\n", this, count));
*contentRead = 0;
*contentRemaining = 0;
NS_ASSERTION(mConnection, "no connection");
if (!mDidContentStart) {
rv = HandleContentStart();
if (NS_FAILED(rv)) return rv;
// Do not write content to the pipe if we haven't started streaming yet
if (!mDidContentStart)
return NS_OK;
}
if (mChunkedDecoder) {
// give the buf over to the chunked decoder so it can reformat the
// data and tell us how much is really there.
rv = mChunkedDecoder->HandleChunkedContent(buf, count, contentRead, contentRemaining);
if (NS_FAILED(rv)) return rv;
}
else if (mContentLength >= int64_t(0)) {
// HTTP/1.0 servers have been known to send erroneous Content-Length
// headers. So, unless the connection is persistent, we must make
// allowances for a possibly invalid Content-Length header. Thus, if
// NOT persistent, we simply accept everything in |buf|.
if (mConnection->IsPersistent() || mPreserveStream ||
mHttpVersion >= NS_HTTP_VERSION_1_1) {
int64_t remaining = mContentLength - mContentRead;
*contentRead = uint32_t(std::min<int64_t>(count, remaining));
*contentRemaining = count - *contentRead;
}
else {
*contentRead = count;
// mContentLength might need to be increased...
int64_t position = mContentRead + int64_t(count);
if (position > mContentLength) {
mContentLength = position;
//mResponseHead->SetContentLength(mContentLength);
}
}
}
else {
// when we are just waiting for the server to close the connection...
// (no explicit content-length given)
*contentRead = count;
}
int64_t toReadBeforeRestart =
mRestartInProgressVerifier.ToReadBeforeRestart();
if (toReadBeforeRestart && *contentRead) {
uint32_t ignore =
static_cast<uint32_t>(std::min<int64_t>(toReadBeforeRestart, UINT32_MAX));
ignore = std::min(*contentRead, ignore);
LOG(("Due To Restart ignoring %d of remaining %ld",
ignore, toReadBeforeRestart));
*contentRead -= ignore;
mContentRead += ignore;
mRestartInProgressVerifier.HaveReadBeforeRestart(ignore);
memmove(buf, buf + ignore, *contentRead + *contentRemaining);
}
if (*contentRead) {
// update count of content bytes read and report progress...
mContentRead += *contentRead;
/* when uncommenting, take care of 64-bit integers w/ std::max...
if (mProgressSink)
mProgressSink->OnProgress(nullptr, nullptr, mContentRead, std::max(0, mContentLength));
*/
}
LOG(("nsHttpTransaction::HandleContent [this=%x count=%u read=%u mContentRead=%lld mContentLength=%lld]\n",
this, count, *contentRead, mContentRead, mContentLength));
// Check the size of chunked responses. If we exceed the max pipeline size
// for this response reschedule the pipeline
if ((mClassification != CLASS_SOLO) &&
mChunkedDecoder &&
((mContentRead + mChunkedDecoder->GetChunkRemaining()) >
mMaxPipelineObjectSize)) {
CancelPipeline(nsHttpConnectionMgr::BadUnexpectedLarge);
}
// check for end-of-file
if ((mContentRead == mContentLength) ||
(mChunkedDecoder && mChunkedDecoder->ReachedEOF())) {
// the transaction is done with a complete response.
mTransactionDone = true;
mResponseIsComplete = true;
ReleaseBlockingTransaction();
if (TimingEnabled())
mTimings.responseEnd = TimeStamp::Now();
// report the entire response has arrived
if (mActivityDistributor)
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_COMPLETE,
PR_Now(),
static_cast<uint64_t>(mContentRead),
EmptyCString());
}
return NS_OK;
}
nsresult
nsHttpTransaction::ProcessData(char *buf, uint32_t count, uint32_t *countRead)
{
nsresult rv;
LOG(("nsHttpTransaction::ProcessData [this=%x count=%u]\n", this, count));
*countRead = 0;
// we may not have read all of the headers yet...
if (!mHaveAllHeaders) {
uint32_t bytesConsumed = 0;
do {
uint32_t localBytesConsumed = 0;
char *localBuf = buf + bytesConsumed;
uint32_t localCount = count - bytesConsumed;
rv = ParseHead(localBuf, localCount, &localBytesConsumed);
if (NS_FAILED(rv) && rv != NS_ERROR_NET_INTERRUPT)
return rv;
bytesConsumed += localBytesConsumed;
} while (rv == NS_ERROR_NET_INTERRUPT);
count -= bytesConsumed;
// if buf has some content in it, shift bytes to top of buf.
if (count && bytesConsumed)
memmove(buf, buf + bytesConsumed, count);
// report the completed response header
if (mActivityDistributor && mResponseHead && mHaveAllHeaders &&
!mReportedResponseHeader) {
mReportedResponseHeader = true;
nsAutoCString completeResponseHeaders;
mResponseHead->Flatten(completeResponseHeaders, false);
completeResponseHeaders.AppendLiteral("\r\n");
mActivityDistributor->ObserveActivity(
mChannel,
NS_HTTP_ACTIVITY_TYPE_HTTP_TRANSACTION,
NS_HTTP_ACTIVITY_SUBTYPE_RESPONSE_HEADER,
PR_Now(), 0,
completeResponseHeaders);
}
}
// even though count may be 0, we still want to call HandleContent
// so it can complete the transaction if this is a "no-content" response.
if (mHaveAllHeaders) {
uint32_t countRemaining = 0;
//
// buf layout:
//
// +--------------------------------------+----------------+-----+
// | countRead | countRemaining | |
// +--------------------------------------+----------------+-----+
//
// count : bytes read from the socket
// countRead : bytes corresponding to this transaction
// countRemaining : bytes corresponding to next pipelined transaction
//
// NOTE:
// count > countRead + countRemaining <==> chunked transfer encoding
//
rv = HandleContent(buf, count, countRead, &countRemaining);
if (NS_FAILED(rv)) return rv;
// we may have read more than our share, in which case we must give
// the excess bytes back to the connection
if (mResponseIsComplete && countRemaining) {
NS_ASSERTION(mConnection, "no connection");
mConnection->PushBack(buf + *countRead, countRemaining);
}
}
return NS_OK;
}
void
nsHttpTransaction::CancelPipeline(uint32_t reason)
{
// reason is casted through a uint to avoid compiler header deps
gHttpHandler->ConnMgr()->PipelineFeedbackInfo(
mConnInfo,
static_cast<nsHttpConnectionMgr::PipelineFeedbackInfoType>(reason),
nullptr, mClassification);
mConnection->CancelPipeline(NS_ERROR_ABORT);
// Avoid pipelining this transaction on restart by classifying it as solo.
// This also prevents BadUnexpectedLarge from being reported more
// than one time per transaction.
mClassification = CLASS_SOLO;
}
// Called when the transaction marked for blocking is associated with a connection
// (i.e. added to a spdy session, an idle http connection, or placed into
// a http pipeline). It is safe to call this multiple times with it only
// having an effect once.
void
nsHttpTransaction::DispatchedAsBlocking()
{
if (mDispatchedAsBlocking)
return;
LOG(("nsHttpTransaction %p dispatched as blocking\n", this));
if (!mLoadGroupCI)
return;
LOG(("nsHttpTransaction adding blocking channel %p from "
"loadgroup %p\n", this, mLoadGroupCI.get()));
mLoadGroupCI->AddBlockingTransaction();
mDispatchedAsBlocking = true;
}
void
nsHttpTransaction::RemoveDispatchedAsBlocking()
{
if (!mLoadGroupCI || !mDispatchedAsBlocking)
return;
uint32_t blockers = 0;
nsresult rv = mLoadGroupCI->RemoveBlockingTransaction(&blockers);
LOG(("nsHttpTransaction removing blocking channel %p from "
"loadgroup %p. %d blockers remain.\n", this,
mLoadGroupCI.get(), blockers));
if (NS_SUCCEEDED(rv) && !blockers) {
LOG(("nsHttpTransaction %p triggering release of blocked channels.\n",
this));
gHttpHandler->ConnMgr()->ProcessPendingQ();
}
mDispatchedAsBlocking = false;
}
void
nsHttpTransaction::ReleaseBlockingTransaction()
{
RemoveDispatchedAsBlocking();
mLoadGroupCI = nullptr;
}
//-----------------------------------------------------------------------------
// nsHttpTransaction deletion event
//-----------------------------------------------------------------------------
class nsDeleteHttpTransaction : public nsRunnable {
public:
nsDeleteHttpTransaction(nsHttpTransaction *trans)
: mTrans(trans)
{}
NS_IMETHOD Run()
{
delete mTrans;
return NS_OK;
}
private:
nsHttpTransaction *mTrans;
};
void
nsHttpTransaction::DeleteSelfOnConsumerThread()
{
LOG(("nsHttpTransaction::DeleteSelfOnConsumerThread [this=%x]\n", this));
bool val;
if (!mConsumerTarget ||
(NS_SUCCEEDED(mConsumerTarget->IsOnCurrentThread(&val)) && val)) {
delete this;
} else {
LOG(("proxying delete to consumer thread...\n"));
nsCOMPtr<nsIRunnable> event = new nsDeleteHttpTransaction(this);
if (NS_FAILED(mConsumerTarget->Dispatch(event, NS_DISPATCH_NORMAL)))
NS_WARNING("failed to dispatch nsHttpDeleteTransaction event");
}
}
bool
nsHttpTransaction::TryToRunPacedRequest()
{
if (mSubmittedRatePacing)
return mPassedRatePacing;
mSubmittedRatePacing = true;
mSynchronousRatePaceRequest = true;
gHttpHandler->SubmitPacedRequest(this, getter_AddRefs(mTokenBucketCancel));
mSynchronousRatePaceRequest = false;
return mPassedRatePacing;
}
void
nsHttpTransaction::OnTokenBucketAdmitted()
{
mPassedRatePacing = true;
mTokenBucketCancel = nullptr;
if (!mSynchronousRatePaceRequest)
gHttpHandler->ConnMgr()->ProcessPendingQ(mConnInfo);
}
void
nsHttpTransaction::CancelPacing(nsresult reason)
{
if (mTokenBucketCancel) {
mTokenBucketCancel->Cancel(reason);
mTokenBucketCancel = nullptr;
}
}
//-----------------------------------------------------------------------------
// nsHttpTransaction::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_THREADSAFE_ADDREF(nsHttpTransaction)
NS_IMETHODIMP_(nsrefcnt)
nsHttpTransaction::Release()
{
nsrefcnt count;
NS_PRECONDITION(0 != mRefCnt, "dup release");
count = NS_AtomicDecrementRefcnt(mRefCnt);
NS_LOG_RELEASE(this, count, "nsHttpTransaction");
if (0 == count) {
mRefCnt = 1; /* stablize */
// it is essential that the transaction be destroyed on the consumer
// thread (we could be holding the last reference to our consumer).
DeleteSelfOnConsumerThread();
return 0;
}
return count;
}
NS_IMPL_THREADSAFE_QUERY_INTERFACE2(nsHttpTransaction,
nsIInputStreamCallback,
nsIOutputStreamCallback)
//-----------------------------------------------------------------------------
// nsHttpTransaction::nsIInputStreamCallback
//-----------------------------------------------------------------------------
// called on the socket thread
NS_IMETHODIMP
nsHttpTransaction::OnInputStreamReady(nsIAsyncInputStream *out)
{
if (mConnection) {
mConnection->TransactionHasDataToWrite(this);
nsresult rv = mConnection->ResumeSend();
if (NS_FAILED(rv))
NS_ERROR("ResumeSend failed");
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpTransaction::nsIOutputStreamCallback
//-----------------------------------------------------------------------------
// called on the socket thread
NS_IMETHODIMP
nsHttpTransaction::OnOutputStreamReady(nsIAsyncOutputStream *out)
{
if (mConnection) {
nsresult rv = mConnection->ResumeRecv();
if (NS_FAILED(rv))
NS_ERROR("ResumeRecv failed");
}
return NS_OK;
}
// nsHttpTransaction::RestartVerifier
static bool
matchOld(nsHttpResponseHead *newHead, nsCString &old,
nsHttpAtom headerAtom)
{
const char *val;
val = newHead->PeekHeader(headerAtom);
if (val && old.IsEmpty())
return false;
if (!val && !old.IsEmpty())
return false;
if (val && !old.Equals(val))
return false;
return true;
}
bool
nsHttpTransaction::RestartVerifier::Verify(int64_t contentLength,
nsHttpResponseHead *newHead)
{
if (mContentLength != contentLength)
return false;
if (newHead->Status() != 200)
return false;
if (!matchOld(newHead, mContentRange, nsHttp::Content_Range))
return false;
if (!matchOld(newHead, mLastModified, nsHttp::Last_Modified))
return false;
if (!matchOld(newHead, mETag, nsHttp::ETag))
return false;
if (!matchOld(newHead, mContentEncoding, nsHttp::Content_Encoding))
return false;
if (!matchOld(newHead, mTransferEncoding, nsHttp::Transfer_Encoding))
return false;
return true;
}
void
nsHttpTransaction::RestartVerifier::Set(int64_t contentLength,
nsHttpResponseHead *head)
{
if (mSetup)
return;
// If mSetup does not transition to true RestartInPogress() is later
// forbidden
// Only RestartInProgress with 200 response code
if (head->Status() != 200)
return;
mContentLength = contentLength;
if (head) {
const char *val;
val = head->PeekHeader(nsHttp::ETag);
if (val)
mETag.Assign(val);
val = head->PeekHeader(nsHttp::Last_Modified);
if (val)
mLastModified.Assign(val);
val = head->PeekHeader(nsHttp::Content_Range);
if (val)
mContentRange.Assign(val);
val = head->PeekHeader(nsHttp::Content_Encoding);
if (val)
mContentEncoding.Assign(val);
val = head->PeekHeader(nsHttp::Transfer_Encoding);
if (val)
mTransferEncoding.Assign(val);
// We can only restart with any confidence if we have a stored etag or
// last-modified header
if (mETag.IsEmpty() && mLastModified.IsEmpty())
return;
mSetup = true;
}
}
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