/*
* Process a socket readable event
*/
static void readEvent(MaConn *conn)
{
MaPacket *packet;
MprBuf *content;
int nbytes, len;
do {
if ((packet = getPacket(conn, &len)) == 0) {
break;
}
mprAssert(len > 0);
content = packet->content;
nbytes = mprReadSocket(conn->sock, mprGetBufEnd(content), len);
showRequest(content, nbytes, len);
if (nbytes > 0) {
mprAdjustBufEnd(content, nbytes);
maProcessReadEvent(conn, packet);
} else {
if (mprIsSocketEof(conn->sock)) {
conn->dedicated = 0;
if (conn->request) {
maProcessReadEvent(conn, packet);
}
} else if (nbytes < 0) {
maFailConnection(conn, MPR_HTTP_CODE_COMMS_ERROR, "Communications read error");
}
}
} while (!conn->disconnected && conn->dedicated);
}
/*
Read data from the peer. This will use the existing conn->input packet or allocate a new packet if required to
hold the data. The number of bytes read is stored in conn->lastRead. SSL connections are traced.
Socket error messages are stored in conn->errorMsg.
*/
static void readPeerData(HttpConn *conn)
{
HttpPacket *packet;
ssize size;
if ((packet = getPacket(conn, &size)) != 0) {
conn->lastRead = mprReadSocket(conn->sock, mprGetBufEnd(packet->content), size);
if (conn->lastRead > 0) {
mprAdjustBufEnd(packet->content, conn->lastRead);
} else if (conn->lastRead < 0 && mprIsSocketEof(conn->sock)) {
if (conn->state < HTTP_STATE_PARSED) {
conn->error = 1;
conn->rx->eof = 1;
}
conn->errorMsg = conn->sock->errorMsg ? conn->sock->errorMsg : sclone("Connection reset");
conn->keepAliveCount = 0;
conn->lastRead = 0;
httpTrace(conn, "connection.close", "context", "msg:'%s'", conn->errorMsg);
}
}
}
/*
* IO event handler. If multithreaded, this will be run by a worker thread. NOTE: a request is not typically permanently
* assigned to a worker thread. Each io event may be serviced by a different worker thread. The exception is CGI
* requests which block to wait for the child to complete (Needed on some platforms that don't permit cross thread
* waiting).
*/
static int ioEvent(MaConn *conn, int mask)
{
mprAssert(conn);
lock(conn);
conn->time = mprGetTime(conn);
mprLog(conn, 7, "ioEvent for fd %d, mask %d\n", conn->sock->fd);
if (mask & MPR_WRITABLE) {
maProcessWriteEvent(conn);
}
if (mask & MPR_READABLE) {
readEvent(conn);
}
conn->time = mprGetTime(conn);
if (mprIsSocketEof(conn->sock) || conn->disconnected || conn->connectionFailed ||
(conn->request == 0 && conn->keepAliveCount < 0)) {
/*
* This will close the connection and free all connection resources. NOTE: we compare keepAliveCount with "< 0"
* so that the client can have one more keep alive request. It should respond to the "Connection: close" and
* thus initiate a client-led close. This reduces TIME_WAIT states on the server. Must unlock the connection
* to allow pending callbacks to run and complete.
*/
unlock(conn);
maDestroyPipeline(conn);
mprFree(conn->arena);
return 1;
}
/*
* We allow read events even if the current request is not complete and does not have body data. The pipelined
* request will be buffered and be ready for when the current request completes.
*/
maEnableConnEvents(conn, MPR_READABLE);
unlock(conn);
return 0;
}
/*
Wait for the connection to reach a given state.
Should only be used on the client side.
@param state Desired state. Set to zero if you want to wait for one I/O event.
@param timeout Timeout in msec. If timeout is zero, wait forever. If timeout is < 0, use default inactivity
and duration timeouts.
*/
PUBLIC int httpWait(HttpConn *conn, int state, MprTicks timeout)
{
HttpLimits *limits;
MprTicks delay, start;
int64 dispatcherMark;
int justOne;
limits = conn->limits;
if (conn->endpoint) {
assert(!conn->endpoint);
return MPR_ERR_BAD_STATE;
}
if (conn->state <= HTTP_STATE_BEGIN) {
return MPR_ERR_BAD_STATE;
}
if (state == 0) {
/* Wait for just one I/O event */
state = HTTP_STATE_FINALIZED;
justOne = 1;
} else {
justOne = 0;
}
if (conn->error) {
if (conn->state >= state) {
return 0;
}
return MPR_ERR_BAD_STATE;
}
if (timeout < 0) {
timeout = limits->requestTimeout;
} else if (timeout == 0) {
timeout = MPR_MAX_TIMEOUT;
}
if (state > HTTP_STATE_CONTENT) {
httpFinalizeOutput(conn);
}
start = conn->http->now;
dispatcherMark = mprGetEventMark(conn->dispatcher);
while (conn->state < state && !conn->error && !mprIsSocketEof(conn->sock)) {
if (httpRequestExpired(conn, -1)) {
return MPR_ERR_TIMEOUT;
}
httpEnableConnEvents(conn);
delay = min(limits->inactivityTimeout, mprGetRemainingTicks(start, timeout));
delay = max(delay, 0);
mprWaitForEvent(conn->dispatcher, delay, dispatcherMark);
if (justOne || (mprGetRemainingTicks(start, timeout) <= 0)) {
break;
}
dispatcherMark = mprGetEventMark(conn->dispatcher);
}
if (conn->error) {
return MPR_ERR_NOT_READY;
}
if (conn->state < state) {
if (mprGetRemainingTicks(start, timeout) <= 0) {
return MPR_ERR_TIMEOUT;
}
if (!justOne) {
return MPR_ERR_CANT_READ;
}
}
conn->lastActivity = conn->http->now;
return 0;
}
/*
Wait for the connection to reach a given state.
Should only be used on the client side.
@param state Desired state. Set to zero if you want to wait for one I/O event.
@param timeout Timeout in msec. If timeout is zero, wait forever. If timeout is < 0, use default inactivity
and duration timeouts.
*/
PUBLIC int httpWait(HttpStream *stream, int state, MprTicks timeout)
{
HttpLimits *limits;
MprTicks delay, start;
int64 dispatcherMark;
int justOne;
limits = stream->limits;
if (httpServerStream(stream)) {
return MPR_ERR_BAD_STATE;
}
if (stream->state <= HTTP_STATE_BEGIN) {
return MPR_ERR_BAD_STATE;
}
if (state == 0) {
/* Wait for just one I/O event */
state = HTTP_STATE_FINALIZED;
justOne = 1;
} else {
justOne = 0;
}
if (stream->error) {
if (stream->state >= state) {
return 0;
}
return MPR_ERR_BAD_STATE;
}
if (timeout < 0) {
timeout = limits->requestTimeout;
} else if (timeout == 0) {
timeout = MPR_MAX_TIMEOUT;
}
if (state > HTTP_STATE_CONTENT) {
httpFinalizeOutput(stream);
}
start = stream->http->now;
dispatcherMark = mprGetEventMark(stream->dispatcher);
// TODO - how does this work with http2?
while (stream->state < state && !stream->error && !mprIsSocketEof(stream->sock)) {
if (httpRequestExpired(stream, -1)) {
return MPR_ERR_TIMEOUT;
}
// TODO - review
httpEnableNetEvents(stream->net);
delay = min(limits->inactivityTimeout, mprGetRemainingTicks(start, timeout));
delay = max(delay, 0);
mprWaitForEvent(stream->dispatcher, delay, dispatcherMark);
if (justOne || (mprGetRemainingTicks(start, timeout) <= 0)) {
break;
}
dispatcherMark = mprGetEventMark(stream->dispatcher);
}
if (stream->error) {
return MPR_ERR_NOT_READY;
}
if (stream->state < state) {
if (mprGetRemainingTicks(start, timeout) <= 0) {
return MPR_ERR_TIMEOUT;
}
if (!justOne) {
return MPR_ERR_CANT_READ;
}
}
stream->lastActivity = stream->http->now;
return 0;
}
/*
Handle IO on the connection. Initially the conn->dispatcher will be set to the server->dispatcher and the first
I/O event will be handled on the server thread (or main thread). A request handler may create a new
conn->dispatcher and transfer execution to a worker thread if required.
*/
PUBLIC void httpIO(HttpConn *conn, int eventMask)
{
MprSocket *sp;
sp = conn->sock;
if (conn->destroyed) {
/* Connection has been destroyed */
return;
}
if (conn->state < HTTP_STATE_PARSED && mprShouldDenyNewRequests()) {
httpDestroyConn(conn);
return;
}
assert(conn->tx);
assert(conn->rx);
#if DEPRECATED || 1
/* Just IO state asserting */
if (conn->io) {
assert(!conn->io);
return;
}
conn->io = 1;
#endif
if ((eventMask & MPR_WRITABLE) && conn->connectorq) {
httpResumeQueue(conn->connectorq);
}
if (eventMask & MPR_READABLE) {
readPeerData(conn);
}
if (sp->secured && !conn->secure) {
conn->secure = 1;
if (sp->peerCert) {
httpTrace(conn, "connection.ssl", "context", "msg:'Connection secured with peer certificate'," \
"secure:true,cipher:'%s',peerName:'%s',subject:'%s',issuer:'%s',session:'%s'",
sp->cipher, sp->peerName, sp->peerCert, sp->peerCertIssuer, sp->session);
} else {
httpTrace(conn, "connection.ssl", "context",
"msg:'Connection secured without peer certificate',secure:true,cipher:'%s',session:'%s'",
sp->cipher, sp->session);
}
if (mprGetLogLevel() >= 5) {
mprLog("info http ssl", 5, "SSL State: %s", mprGetSocketState(sp));
}
}
/*
Process one or more complete requests in the packet
*/
do {
/* This is and must be the only place httpProtocol is ever called */
httpProtocol(conn);
} while (conn->endpoint && conn->state == HTTP_STATE_COMPLETE && prepForNext(conn));
/*
When a request completes, prepForNext will reset the state to HTTP_STATE_BEGIN
*/
if (conn->state < HTTP_STATE_PARSED && conn->endpoint && (mprIsSocketEof(conn->sock) || (conn->keepAliveCount <= 0))) {
httpDestroyConn(conn);
} else if (!mprIsSocketEof(conn->sock) && conn->async && !conn->delay) {
httpEnableConnEvents(conn);
}
conn->io = 0;
}
