static void cgiToBrowserService(HttpQueue *q)
{
HttpConn *conn;
MprCmd *cmd;
Cgi *cgi;
if ((cgi = q->queueData) == 0) {
return;
}
conn = q->conn;
assert(q == conn->writeq);
cmd = cgi->cmd;
/*
This will copy outgoing packets downstream toward the network connector and on to the browser.
This may disable the CGI queue if the downstream net connector queue overflows because the socket
is full. In that case, httpEnableConnEvents will setup to listen for writable events. When the
socket is writable again, the connector will drain its queue which will re-enable this queue
and schedule it for service again.
*/
httpDefaultOutgoingServiceStage(q);
if (q->count < q->low) {
mprEnableCmdOutputEvents(cmd, 1);
} else if (q->count > q->max && conn->tx->writeBlocked) {
httpSuspendQueue(conn->writeq);
}
}
/*
Read the output data from the CGI script and return it to the client. This is called by the MPR in response to
I/O events from the CGI process for stdout/stderr data from the CGI script and for EOF from the CGI's stdin.
IMPORTANT: This event runs on the connection's dispatcher. (ie. single threaded and safe)
*/
static void cgiCallback(MprCmd *cmd, int channel, void *data)
{
HttpConn *conn;
Cgi *cgi;
int suspended;
if ((cgi = data) == 0) {
return;
}
if ((conn = cgi->conn) == 0) {
return;
}
conn->lastActivity = conn->http->now;
switch (channel) {
case MPR_CMD_STDIN:
/* Stdin can absorb more data */
httpResumeQueue(cgi->writeq);
break;
case MPR_CMD_STDOUT:
case MPR_CMD_STDERR:
readFromCgi(cgi, channel);
break;
default:
/* Child death notification */
if (cmd->status != 0) {
httpError(cgi->conn, HTTP_CODE_BAD_GATEWAY, "Bad CGI process termination");
}
break;
}
if (cgi->location) {
httpRedirect(conn, conn->tx->status, cgi->location);
}
if (cmd->complete || cgi->location) {
cgi->location = 0;
httpFinalize(conn);
mprCreateEvent(conn->dispatcher, "cgiComplete", 0, httpIOEvent, conn, 0);
return;
}
suspended = httpIsQueueSuspended(conn->writeq);
assert(!suspended || conn->tx->writeBlocked);
mprEnableCmdOutputEvents(cmd, !suspended);
mprCreateEvent(conn->dispatcher, "cgi", 0, httpIOEvent, conn, 0);
}
/*
Read the output data from the CGI script and return it to the client. This is called by the MPR in response to
I/O events from the CGI process for stdout/stderr data from the CGI script and for EOF from the CGI's stdin.
IMPORTANT: This event runs on the connection's dispatcher. (ie. single threaded and safe)
*/
static void cgiCallback(MprCmd *cmd, int channel, void *data)
{
HttpConn *conn;
Cgi *cgi;
int suspended;
if ((cgi = data) == 0) {
return;
}
if ((conn = cgi->conn) == 0) {
return;
}
conn->lastActivity = conn->http->now;
mprTrace(6, "CGI: cgiCallback event channel %d", channel);
switch (channel) {
case MPR_CMD_STDIN:
/* Stdin can absorb more data */
httpResumeQueue(cgi->writeq);
break;
case MPR_CMD_STDOUT:
case MPR_CMD_STDERR:
readFromCgi(cgi, channel);
break;
default:
/* Child death notification */
break;
}
if (cgi->location) {
httpRedirect(conn, conn->tx->status, cgi->location);
}
if (cmd->complete || cgi->location) {
cgi->location = 0;
httpFinalize(conn);
mprCreateEvent(conn->dispatcher, "cgiComplete", 0, httpIOEvent, conn, 0);
return;
}
suspended = httpIsQueueSuspended(conn->writeq);
mprTrace(6, "CGI: %s CGI: cgiCallback. Conn->writeq %d", suspended ? "DISABLE" : "ENABLE", conn->writeq->count);
assert(!suspended || conn->tx->writeBlocked);
mprEnableCmdOutputEvents(cmd, !suspended);
mprCreateEvent(conn->dispatcher, "cgi", 0, httpIOEvent, conn, 0);
}