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pjs/netwerk/protocol/http/nsHttpConnection.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: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.
*
* The Initial Developer of the Original Code is
* Netscape Communications.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsHttpConnection.h"
#include "nsHttpTransaction.h"
#include "nsHttpRequestHead.h"
#include "nsHttpResponseHead.h"
#include "nsHttpHandler.h"
#include "nsIOService.h"
#include "nsISocketTransportService.h"
#include "nsISocketTransport.h"
#include "nsIServiceManager.h"
#include "nsISSLSocketControl.h"
#include "nsStringStream.h"
#include "netCore.h"
#include "nsNetCID.h"
#include "nsProxyRelease.h"
#include "prmem.h"
#include "nsPreloadedStream.h"
#ifdef DEBUG
// defined by the socket transport service while active
extern PRThread *gSocketThread;
#endif
static NS_DEFINE_CID(kSocketTransportServiceCID, NS_SOCKETTRANSPORTSERVICE_CID);
using namespace mozilla::net;
//-----------------------------------------------------------------------------
// nsHttpConnection <public>
//-----------------------------------------------------------------------------
nsHttpConnection::nsHttpConnection()
: mTransaction(nsnull)
, mLastReadTime(0)
, mIdleTimeout(0)
, mConsiderReusedAfterInterval(0)
, mConsiderReusedAfterEpoch(0)
, mCurrentBytesRead(0)
, mMaxBytesRead(0)
, mKeepAlive(PR_TRUE) // assume to keep-alive by default
, mKeepAliveMask(PR_TRUE)
, mSupportsPipelining(PR_FALSE) // assume low-grade server
, mIsReused(PR_FALSE)
, mCompletedProxyConnect(PR_FALSE)
, mLastTransactionExpectedNoContent(PR_FALSE)
, mIdleMonitoring(PR_FALSE)
{
LOG(("Creating nsHttpConnection @%x\n", this));
// grab a reference to the handler to ensure that it doesn't go away.
nsHttpHandler *handler = gHttpHandler;
NS_ADDREF(handler);
}
nsHttpConnection::~nsHttpConnection()
{
LOG(("Destroying nsHttpConnection @%x\n", this));
if (mCallbacks) {
nsIInterfaceRequestor *cbs = nsnull;
mCallbacks.swap(cbs);
NS_ProxyRelease(mCallbackTarget, cbs);
}
// release our reference to the handler
nsHttpHandler *handler = gHttpHandler;
NS_RELEASE(handler);
}
nsresult
nsHttpConnection::Init(nsHttpConnectionInfo *info,
PRUint16 maxHangTime,
nsISocketTransport *transport,
nsIAsyncInputStream *instream,
nsIAsyncOutputStream *outstream,
nsIInterfaceRequestor *callbacks,
nsIEventTarget *callbackTarget)
{
NS_ABORT_IF_FALSE(transport && instream && outstream,
"invalid socket information");
LOG(("nsHttpConnection::Init [this=%p "
"transport=%p instream=%p outstream=%p]\n",
this, transport, instream, outstream));
NS_ENSURE_ARG_POINTER(info);
NS_ENSURE_TRUE(!mConnInfo, NS_ERROR_ALREADY_INITIALIZED);
mConnInfo = info;
mMaxHangTime = maxHangTime;
mLastReadTime = NowInSeconds();
mSocketTransport = transport;
mSocketIn = instream;
mSocketOut = outstream;
nsresult rv = mSocketTransport->SetEventSink(this, nsnull);
NS_ENSURE_SUCCESS(rv, rv);
mCallbacks = callbacks;
mCallbackTarget = callbackTarget;
rv = mSocketTransport->SetSecurityCallbacks(this);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
// called on the socket thread
nsresult
nsHttpConnection::Activate(nsAHttpTransaction *trans, PRUint8 caps)
{
nsresult rv;
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
LOG(("nsHttpConnection::Activate [this=%x trans=%x caps=%x]\n",
this, trans, caps));
NS_ENSURE_ARG_POINTER(trans);
NS_ENSURE_TRUE(!mTransaction, NS_ERROR_IN_PROGRESS);
// Update security callbacks
nsCOMPtr<nsIInterfaceRequestor> callbacks;
nsCOMPtr<nsIEventTarget> callbackTarget;
trans->GetSecurityCallbacks(getter_AddRefs(callbacks),
getter_AddRefs(callbackTarget));
if (callbacks != mCallbacks) {
mCallbacks.swap(callbacks);
if (callbacks)
NS_ProxyRelease(mCallbackTarget, callbacks);
mCallbackTarget = callbackTarget;
}
// take ownership of the transaction
mTransaction = trans;
NS_ABORT_IF_FALSE(!mIdleMonitoring,
"Activating a connection with an Idle Monitor");
mIdleMonitoring = PR_FALSE;
// set mKeepAlive according to what will be requested
mKeepAliveMask = mKeepAlive = (caps & NS_HTTP_ALLOW_KEEPALIVE);
// need to handle HTTP CONNECT tunnels if this is the first time if
// we are tunneling through a proxy
if (((mConnInfo->UsingSSL() && mConnInfo->UsingHttpProxy()) ||
mConnInfo->ShouldForceConnectMethod()) && !mCompletedProxyConnect) {
rv = SetupProxyConnect();
if (NS_FAILED(rv))
goto failed_activation;
}
// Clear the per activation counter
mCurrentBytesRead = 0;
rv = OnOutputStreamReady(mSocketOut);
failed_activation:
if (NS_FAILED(rv)) {
mTransaction = nsnull;
}
return rv;
}
void
nsHttpConnection::Close(nsresult reason)
{
LOG(("nsHttpConnection::Close [this=%x reason=%x]\n", this, reason));
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (NS_FAILED(reason)) {
if (mIdleMonitoring)
EndIdleMonitoring();
if (mSocketTransport) {
mSocketTransport->SetSecurityCallbacks(nsnull);
mSocketTransport->SetEventSink(nsnull, nsnull);
mSocketTransport->Close(reason);
}
mKeepAlive = PR_FALSE;
}
}
// called on the socket thread
nsresult
nsHttpConnection::ProxyStartSSL()
{
LOG(("nsHttpConnection::ProxyStartSSL [this=%x]\n", this));
#ifdef DEBUG
NS_PRECONDITION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
#endif
nsCOMPtr<nsISupports> securityInfo;
nsresult rv = mSocketTransport->GetSecurityInfo(getter_AddRefs(securityInfo));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsISSLSocketControl> ssl = do_QueryInterface(securityInfo, &rv);
if (NS_FAILED(rv)) return rv;
return ssl->ProxyStartSSL();
}
PRBool
nsHttpConnection::CanReuse()
{
PRBool canReuse = IsKeepAlive() &&
(NowInSeconds() - mLastReadTime < mIdleTimeout) &&
IsAlive();
// An idle persistent connection should not have data waiting to be read
// before a request is sent. Data here is likely a 408 timeout response
// which we would deal with later on through the restart logic, but that
// path is more expensive than just closing the socket now. SSL check can
// be removed with fixing of 631801
PRUint32 dataSize;
if (canReuse && mSocketIn && !mConnInfo->UsingSSL() &&
NS_SUCCEEDED(mSocketIn->Available(&dataSize)) && dataSize) {
LOG(("nsHttpConnection::CanReuse %p %s"
"Socket not reusable because read data pending (%d) on it.\n",
this, mConnInfo->Host(), dataSize));
canReuse = PR_FALSE;
}
return canReuse;
}
PRUint32 nsHttpConnection::TimeToLive()
{
PRInt32 tmp = mIdleTimeout - (NowInSeconds() - mLastReadTime);
if (0 > tmp)
tmp = 0;
return tmp;
}
PRBool
nsHttpConnection::IsAlive()
{
if (!mSocketTransport)
return PR_FALSE;
PRBool alive;
nsresult rv = mSocketTransport->IsAlive(&alive);
if (NS_FAILED(rv))
alive = PR_FALSE;
//#define TEST_RESTART_LOGIC
#ifdef TEST_RESTART_LOGIC
if (!alive) {
LOG(("pretending socket is still alive to test restart logic\n"));
alive = PR_TRUE;
}
#endif
return alive;
}
PRBool
nsHttpConnection::SupportsPipelining(nsHttpResponseHead *responseHead)
{
// XXX there should be a strict mode available that disables this
// blacklisting.
// assuming connection is HTTP/1.1 with keep-alive enabled
if (mConnInfo->UsingHttpProxy() && !mConnInfo->UsingSSL()) {
// XXX check for bad proxy servers...
return PR_TRUE;
}
// XXX what about checking for a Via header? (transparent proxies)
// check for bad origin servers
const char *val = responseHead->PeekHeader(nsHttp::Server);
if (!val)
return PR_FALSE; // no header, no love
// The blacklist is indexed by the first character. All of these servers are
// known to return their identifier as the first thing in the server string,
// so we can do a leading match.
static const char *bad_servers[26][5] = {
{ nsnull }, { nsnull }, { nsnull }, { nsnull }, // a - d
{ "EFAServer/", nsnull }, // e
{ nsnull }, { nsnull }, { nsnull }, { nsnull }, // f - i
{ nsnull }, { nsnull }, { nsnull }, // j - l
{ "Microsoft-IIS/4.", "Microsoft-IIS/5.", nsnull }, // m
{ "Netscape-Enterprise/3.", "Netscape-Enterprise/4.",
"Netscape-Enterprise/5.", "Netscape-Enterprise/6.", nsnull }, // n
{ nsnull }, { nsnull }, { nsnull }, { nsnull }, // o - r
{ nsnull }, { nsnull }, { nsnull }, { nsnull }, // s - v
{ "WebLogic 3.", "WebLogic 4.","WebLogic 5.", "WebLogic 6.", nsnull }, // w
{ nsnull }, { nsnull }, { nsnull } // x - z
};
int index = val[0] - 'A'; // the whole table begins with capital letters
if ((index >= 0) && (index <= 25))
{
for (int i = 0; bad_servers[index][i] != nsnull; i++) {
if (!PL_strncmp (val, bad_servers[index][i], strlen (bad_servers[index][i]))) {
LOG(("looks like this server does not support pipelining"));
return PR_FALSE;
}
}
}
// ok, let's allow pipelining to this server
return PR_TRUE;
}
//----------------------------------------------------------------------------
// nsHttpConnection::nsAHttpConnection compatible methods
//----------------------------------------------------------------------------
nsresult
nsHttpConnection::OnHeadersAvailable(nsAHttpTransaction *trans,
nsHttpRequestHead *requestHead,
nsHttpResponseHead *responseHead,
PRBool *reset)
{
LOG(("nsHttpConnection::OnHeadersAvailable [this=%p trans=%p response-head=%p]\n",
this, trans, responseHead));
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
NS_ENSURE_ARG_POINTER(trans);
NS_ASSERTION(responseHead, "No response head?");
// If the server issued an explicit timeout, then we need to close down the
// socket transport. We pass an error code of NS_ERROR_NET_RESET to
// trigger the transactions 'restart' mechanism. We tell it to reset its
// response headers so that it will be ready to receive the new response.
if (responseHead->Status() == 408) {
Close(NS_ERROR_NET_RESET);
*reset = PR_TRUE;
return NS_OK;
}
// we won't change our keep-alive policy unless the server has explicitly
// told us to do so.
// inspect the connection headers for keep-alive info provided the
// transaction completed successfully.
const char *val = responseHead->PeekHeader(nsHttp::Connection);
if (!val)
val = responseHead->PeekHeader(nsHttp::Proxy_Connection);
// reset to default (the server may have changed since we last checked)
mSupportsPipelining = PR_FALSE;
if ((responseHead->Version() < NS_HTTP_VERSION_1_1) ||
(requestHead->Version() < NS_HTTP_VERSION_1_1)) {
// HTTP/1.0 connections are by default NOT persistent
if (val && !PL_strcasecmp(val, "keep-alive"))
mKeepAlive = PR_TRUE;
else
mKeepAlive = PR_FALSE;
}
else {
// HTTP/1.1 connections are by default persistent
if (val && !PL_strcasecmp(val, "close"))
mKeepAlive = PR_FALSE;
else {
mKeepAlive = PR_TRUE;
// Do not support pipelining when we are establishing
// an SSL tunnel though an HTTP proxy. Pipelining support
// determination must be based on comunication with the
// target server in this case. See bug 422016 for futher
// details.
if (!mProxyConnectStream)
mSupportsPipelining = SupportsPipelining(responseHead);
}
}
mKeepAliveMask = mKeepAlive;
// if this connection is persistent, then the server may send a "Keep-Alive"
// header specifying the maximum number of times the connection can be
// reused as well as the maximum amount of time the connection can be idle
// before the server will close it. we ignore the max reuse count, because
// a "keep-alive" connection is by definition capable of being reused, and
// we only care about being able to reuse it once. if a timeout is not
// specified then we use our advertized timeout value.
if (mKeepAlive) {
val = responseHead->PeekHeader(nsHttp::Keep_Alive);
const char *cp = PL_strcasestr(val, "timeout=");
if (cp)
mIdleTimeout = (PRUint32) atoi(cp + 8);
else
mIdleTimeout = gHttpHandler->IdleTimeout();
LOG(("Connection can be reused [this=%x idle-timeout=%u]\n", this, mIdleTimeout));
}
// if we're doing an SSL proxy connect, then we need to check whether or not
// the connect was successful. if so, then we have to reset the transaction
// and step-up the socket connection to SSL. finally, we have to wake up the
// socket write request.
if (mProxyConnectStream) {
mProxyConnectStream = 0;
if (responseHead->Status() == 200) {
LOG(("proxy CONNECT succeeded! ssl=%s\n",
mConnInfo->UsingSSL() ? "true" :"false"));
*reset = PR_TRUE;
nsresult rv;
if (mConnInfo->UsingSSL()) {
rv = ProxyStartSSL();
if (NS_FAILED(rv)) // XXX need to handle this for real
LOG(("ProxyStartSSL failed [rv=%x]\n", rv));
}
mCompletedProxyConnect = PR_TRUE;
rv = mSocketOut->AsyncWait(this, 0, 0, nsnull);
// XXX what if this fails -- need to handle this error
NS_ASSERTION(NS_SUCCEEDED(rv), "mSocketOut->AsyncWait failed");
}
else {
LOG(("proxy CONNECT failed! ssl=%s\n",
mConnInfo->UsingSSL() ? "true" :"false"));
mTransaction->SetSSLConnectFailed();
}
}
const char *upgradeReq = requestHead->PeekHeader(nsHttp::Upgrade);
if (upgradeReq) {
LOG(("HTTP Upgrade in play - disable keepalive\n"));
DontReuse();
}
if (responseHead->Status() == 101) {
const char *upgradeResp = responseHead->PeekHeader(nsHttp::Upgrade);
if (!upgradeReq || !upgradeResp ||
!nsHttp::FindToken(upgradeResp, upgradeReq,
HTTP_HEADER_VALUE_SEPS)) {
LOG(("HTTP 101 Upgrade header mismatch req = %s, resp = %s\n",
upgradeReq, upgradeResp));
Close(NS_ERROR_ABORT);
}
else {
LOG(("HTTP Upgrade Response to %s\n", upgradeResp));
}
}
return NS_OK;
}
PRBool
nsHttpConnection::IsReused()
{
if (mIsReused)
return PR_TRUE;
if (!mConsiderReusedAfterInterval)
return PR_FALSE;
// ReusedAfter allows a socket to be consider reused only after a certain
// interval of time has passed
return (PR_IntervalNow() - mConsiderReusedAfterEpoch) >=
mConsiderReusedAfterInterval;
}
void
nsHttpConnection::SetIsReusedAfter(PRUint32 afterMilliseconds)
{
mConsiderReusedAfterEpoch = PR_IntervalNow();
mConsiderReusedAfterInterval = PR_MillisecondsToInterval(afterMilliseconds);
}
nsresult
nsHttpConnection::TakeTransport(nsISocketTransport **aTransport,
nsIAsyncInputStream **aInputStream,
nsIAsyncOutputStream **aOutputStream)
{
if (mTransaction && !mTransaction->IsDone())
return NS_ERROR_IN_PROGRESS;
if (!(mSocketTransport && mSocketIn && mSocketOut))
return NS_ERROR_NOT_INITIALIZED;
if (mInputOverflow)
mSocketIn = mInputOverflow.forget();
NS_IF_ADDREF(*aTransport = mSocketTransport);
NS_IF_ADDREF(*aInputStream = mSocketIn);
NS_IF_ADDREF(*aOutputStream = mSocketOut);
mSocketTransport->SetSecurityCallbacks(nsnull);
mSocketTransport->SetEventSink(nsnull, nsnull);
mSocketTransport = nsnull;
mSocketIn = nsnull;
mSocketOut = nsnull;
return NS_OK;
}
void
nsHttpConnection::GetSecurityInfo(nsISupports **secinfo)
{
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mSocketTransport) {
if (NS_FAILED(mSocketTransport->GetSecurityInfo(secinfo)))
*secinfo = nsnull;
}
}
nsresult
nsHttpConnection::PushBack(const char *data, PRUint32 length)
{
LOG(("nsHttpConnection::PushBack [this=%p, length=%d]\n", this, length));
if (mInputOverflow) {
NS_ERROR("nsHttpConnection::PushBack only one buffer supported");
return NS_ERROR_UNEXPECTED;
}
mInputOverflow = new nsPreloadedStream(mSocketIn, data, length);
return NS_OK;
}
nsresult
nsHttpConnection::ResumeSend()
{
LOG(("nsHttpConnection::ResumeSend [this=%p]\n", this));
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mSocketOut)
return mSocketOut->AsyncWait(this, 0, 0, nsnull);
NS_NOTREACHED("no socket output stream");
return NS_ERROR_UNEXPECTED;
}
nsresult
nsHttpConnection::ResumeRecv()
{
LOG(("nsHttpConnection::ResumeRecv [this=%p]\n", this));
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mSocketIn)
return mSocketIn->AsyncWait(this, 0, 0, nsnull);
NS_NOTREACHED("no socket input stream");
return NS_ERROR_UNEXPECTED;
}
void
nsHttpConnection::BeginIdleMonitoring()
{
LOG(("nsHttpConnection::BeginIdleMonitoring [this=%p]\n", this));
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
NS_ABORT_IF_FALSE(!mTransaction, "BeginIdleMonitoring() while active");
LOG(("Entering Idle Monitoring Mode [this=%p]", this));
mIdleMonitoring = PR_TRUE;
if (mSocketIn)
mSocketIn->AsyncWait(this, 0, 0, nsnull);
}
void
nsHttpConnection::EndIdleMonitoring()
{
LOG(("nsHttpConnection::EndIdleMonitoring [this=%p]\n", this));
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
NS_ABORT_IF_FALSE(!mTransaction, "EndIdleMonitoring() while active");
if (mIdleMonitoring) {
LOG(("Leaving Idle Monitoring Mode [this=%p]", this));
mIdleMonitoring = PR_FALSE;
if (mSocketIn)
mSocketIn->AsyncWait(nsnull, 0, 0, nsnull);
}
}
//-----------------------------------------------------------------------------
// nsHttpConnection <private>
//-----------------------------------------------------------------------------
void
nsHttpConnection::CloseTransaction(nsAHttpTransaction *trans, nsresult reason)
{
LOG(("nsHttpConnection::CloseTransaction[this=%x trans=%x reason=%x]\n",
this, trans, reason));
NS_ASSERTION(trans == mTransaction, "wrong transaction");
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mCurrentBytesRead > mMaxBytesRead)
mMaxBytesRead = mCurrentBytesRead;
// mask this error code because its not a real error.
if (reason == NS_BASE_STREAM_CLOSED)
reason = NS_OK;
mTransaction->Close(reason);
mTransaction = nsnull;
if (mCallbacks) {
nsIInterfaceRequestor *cbs = nsnull;
mCallbacks.swap(cbs);
NS_ProxyRelease(mCallbackTarget, cbs);
}
if (NS_FAILED(reason))
Close(reason);
// flag the connection as reused here for convenience sake. certainly
// it might be going away instead ;-)
mIsReused = PR_TRUE;
}
NS_METHOD
nsHttpConnection::ReadFromStream(nsIInputStream *input,
void *closure,
const char *buf,
PRUint32 offset,
PRUint32 count,
PRUint32 *countRead)
{
// thunk for nsIInputStream instance
nsHttpConnection *conn = (nsHttpConnection *) closure;
return conn->OnReadSegment(buf, count, countRead);
}
nsresult
nsHttpConnection::OnReadSegment(const char *buf,
PRUint32 count,
PRUint32 *countRead)
{
if (count == 0) {
// some ReadSegments implementations will erroneously call the writer
// to consume 0 bytes worth of data. we must protect against this case
// or else we'd end up closing the socket prematurely.
NS_ERROR("bad ReadSegments implementation");
return NS_ERROR_FAILURE; // stop iterating
}
nsresult rv = mSocketOut->Write(buf, count, countRead);
if (NS_FAILED(rv))
mSocketOutCondition = rv;
else if (*countRead == 0)
mSocketOutCondition = NS_BASE_STREAM_CLOSED;
else
mSocketOutCondition = NS_OK; // reset condition
return mSocketOutCondition;
}
nsresult
nsHttpConnection::OnSocketWritable()
{
LOG(("nsHttpConnection::OnSocketWritable [this=%x]\n", this));
nsresult rv;
PRUint32 n;
PRBool again = PR_TRUE;
do {
// if we're doing an SSL proxy connect, then we need to bypass calling
// into the transaction.
//
// NOTE: this code path can't be shared since the transaction doesn't
// implement nsIInputStream. doing so is not worth the added cost of
// extra indirections during normal reading.
//
if (mProxyConnectStream) {
LOG((" writing CONNECT request stream\n"));
rv = mProxyConnectStream->ReadSegments(ReadFromStream, this,
nsIOService::gDefaultSegmentSize,
&n);
}
else {
LOG((" writing transaction request stream\n"));
rv = mTransaction->ReadSegments(this, nsIOService::gDefaultSegmentSize, &n);
}
LOG((" ReadSegments returned [rv=%x read=%u sock-cond=%x]\n",
rv, n, mSocketOutCondition));
// XXX some streams return NS_BASE_STREAM_CLOSED to indicate EOF.
if (rv == NS_BASE_STREAM_CLOSED) {
rv = NS_OK;
n = 0;
}
if (NS_FAILED(rv)) {
// if the transaction didn't want to write any more data, then
// wait for the transaction to call ResumeSend.
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
rv = NS_OK;
again = PR_FALSE;
}
else if (NS_FAILED(mSocketOutCondition)) {
if (mSocketOutCondition == NS_BASE_STREAM_WOULD_BLOCK)
rv = mSocketOut->AsyncWait(this, 0, 0, nsnull); // continue writing
else
rv = mSocketOutCondition;
again = PR_FALSE;
}
else if (n == 0) {
//
// at this point we've written out the entire transaction, and now we
// must wait for the server's response. we manufacture a status message
// here to reflect the fact that we are waiting. this message will be
// trumped (overwritten) if the server responds quickly.
//
mTransaction->OnTransportStatus(mSocketTransport,
nsISocketTransport::STATUS_WAITING_FOR,
LL_ZERO);
rv = mSocketIn->AsyncWait(this, 0, 0, nsnull); // start reading
again = PR_FALSE;
}
// write more to the socket until error or end-of-request...
} while (again);
return rv;
}
nsresult
nsHttpConnection::OnWriteSegment(char *buf,
PRUint32 count,
PRUint32 *countWritten)
{
if (count == 0) {
// some WriteSegments implementations will erroneously call the reader
// to provide 0 bytes worth of data. we must protect against this case
// or else we'd end up closing the socket prematurely.
NS_ERROR("bad WriteSegments implementation");
return NS_ERROR_FAILURE; // stop iterating
}
nsresult rv = mSocketIn->Read(buf, count, countWritten);
if (NS_FAILED(rv))
mSocketInCondition = rv;
else if (*countWritten == 0)
mSocketInCondition = NS_BASE_STREAM_CLOSED;
else
mSocketInCondition = NS_OK; // reset condition
return mSocketInCondition;
}
nsresult
nsHttpConnection::OnSocketReadable()
{
LOG(("nsHttpConnection::OnSocketReadable [this=%x]\n", this));
PRUint32 now = NowInSeconds();
if (mKeepAliveMask && (now - mLastReadTime >= PRUint32(mMaxHangTime))) {
LOG(("max hang time exceeded!\n"));
// give the handler a chance to create a new persistent connection to
// this host if we've been busy for too long.
mKeepAliveMask = PR_FALSE;
gHttpHandler->ProcessPendingQ(mConnInfo);
}
mLastReadTime = now;
nsresult rv;
PRUint32 n;
PRBool again = PR_TRUE;
do {
rv = mTransaction->WriteSegments(this, nsIOService::gDefaultSegmentSize, &n);
if (NS_FAILED(rv)) {
// if the transaction didn't want to take any more data, then
// wait for the transaction to call ResumeRecv.
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
rv = NS_OK;
again = PR_FALSE;
}
else {
mCurrentBytesRead += n;
if (NS_FAILED(mSocketInCondition)) {
// continue waiting for the socket if necessary...
if (mSocketInCondition == NS_BASE_STREAM_WOULD_BLOCK)
rv = mSocketIn->AsyncWait(this, 0, 0, nsnull);
else
rv = mSocketInCondition;
again = PR_FALSE;
}
}
// read more from the socket until error...
} while (again);
return rv;
}
nsresult
nsHttpConnection::SetupProxyConnect()
{
const char *val;
LOG(("nsHttpConnection::SetupProxyConnect [this=%x]\n", this));
NS_ENSURE_TRUE(!mProxyConnectStream, NS_ERROR_ALREADY_INITIALIZED);
nsCAutoString buf;
nsresult rv = nsHttpHandler::GenerateHostPort(
nsDependentCString(mConnInfo->Host()), mConnInfo->Port(), buf);
if (NS_FAILED(rv))
return rv;
// CONNECT host:port HTTP/1.1
nsHttpRequestHead request;
request.SetMethod(nsHttp::Connect);
request.SetVersion(gHttpHandler->HttpVersion());
request.SetRequestURI(buf);
request.SetHeader(nsHttp::User_Agent, gHttpHandler->UserAgent());
// send this header for backwards compatibility.
request.SetHeader(nsHttp::Proxy_Connection, NS_LITERAL_CSTRING("keep-alive"));
val = mTransaction->RequestHead()->PeekHeader(nsHttp::Host);
if (val) {
// all HTTP/1.1 requests must include a Host header (even though it
// may seem redundant in this case; see bug 82388).
request.SetHeader(nsHttp::Host, nsDependentCString(val));
}
val = mTransaction->RequestHead()->PeekHeader(nsHttp::Proxy_Authorization);
if (val) {
// we don't know for sure if this authorization is intended for the
// SSL proxy, so we add it just in case.
request.SetHeader(nsHttp::Proxy_Authorization, nsDependentCString(val));
}
buf.Truncate();
request.Flatten(buf, PR_FALSE);
buf.AppendLiteral("\r\n");
return NS_NewCStringInputStream(getter_AddRefs(mProxyConnectStream), buf);
}
//-----------------------------------------------------------------------------
// nsHttpConnection::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_THREADSAFE_ISUPPORTS4(nsHttpConnection,
nsIInputStreamCallback,
nsIOutputStreamCallback,
nsITransportEventSink,
nsIInterfaceRequestor)
//-----------------------------------------------------------------------------
// nsHttpConnection::nsIInputStreamCallback
//-----------------------------------------------------------------------------
// called on the socket transport thread
NS_IMETHODIMP
nsHttpConnection::OnInputStreamReady(nsIAsyncInputStream *in)
{
NS_ASSERTION(in == mSocketIn, "unexpected stream");
NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread");
if (mIdleMonitoring) {
NS_ABORT_IF_FALSE(!mTransaction, "Idle Input Event While Active");
// The only read event that is protocol compliant for an idle connection
// is an EOF, which we check for with CanReuse(). If the data is
// something else then just ignore it and suspend checking for EOF -
// our normal timers or protocol stack are the place to deal with
// any exception logic.
if (!CanReuse()) {
LOG(("Server initiated close of idle conn %p\n", this));
gHttpHandler->ConnMgr()->CloseIdleConnection(this);
return NS_OK;
}
LOG(("Input data on idle conn %p, but not closing yet\n", this));
return NS_OK;
}
// if the transaction was dropped...
if (!mTransaction) {
LOG((" no transaction; ignoring event\n"));
return NS_OK;
}
nsresult rv = OnSocketReadable();
if (NS_FAILED(rv))
CloseTransaction(mTransaction, rv);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpConnection::nsIOutputStreamCallback
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpConnection::OnOutputStreamReady(nsIAsyncOutputStream *out)
{
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread");
NS_ABORT_IF_FALSE(out == mSocketOut, "unexpected socket");
// if the transaction was dropped...
if (!mTransaction) {
LOG((" no transaction; ignoring event\n"));
return NS_OK;
}
nsresult rv = OnSocketWritable();
if (NS_FAILED(rv))
CloseTransaction(mTransaction, rv);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpConnection::nsITransportEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpConnection::OnTransportStatus(nsITransport *trans,
nsresult status,
PRUint64 progress,
PRUint64 progressMax)
{
if (mTransaction)
mTransaction->OnTransportStatus(trans, status, progress);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpConnection::nsIInterfaceRequestor
//-----------------------------------------------------------------------------
// not called on the socket transport thread
NS_IMETHODIMP
nsHttpConnection::GetInterface(const nsIID &iid, void **result)
{
// NOTE: This function is only called on the UI thread via sync proxy from
// the socket transport thread. If that weren't the case, then we'd
// have to worry about the possibility of mTransaction going away
// part-way through this function call. See CloseTransaction.
// NOTE - there is a bug here, the call to getinterface is proxied off the
// nss thread, not the ui thread as the above comment says. So there is
// indeed a chance of mTransaction going away. bug 615342
NS_ASSERTION(PR_GetCurrentThread() != gSocketThread, "wrong thread");
if (mCallbacks)
return mCallbacks->GetInterface(iid, result);
return NS_ERROR_NO_INTERFACE;
}
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