/*
Accept incoming body data from the client (via the pipeline) destined for the CGI gateway. This is typically
POST or PUT data.
*/
static void incomingCgiData(MaQueue *q, MaPacket *packet)
{
MaConn *conn;
MaResponse *resp;
MaRequest *req;
MprCmd *cmd;
mprAssert(q);
mprAssert(packet);
conn = q->conn;
resp = conn->response;
req = conn->request;
cmd = (MprCmd*) q->pair->queueData;
if (cmd) {
cmd->lastActivity = mprGetTime(cmd);
}
if (maGetPacketLength(packet) == 0) {
/*
End of input
*/
if (req->remainingContent > 0) {
/*
Short incoming body data. Just kill the CGI process.
*/
mprFree(cmd);
q->queueData = 0;
maFailRequest(conn, MPR_HTTP_CODE_BAD_REQUEST, "Client supplied insufficient body data");
}
if (req->form) {
maAddVarsFromQueue(req->formVars, q);
}
} else {
/*
No service routine, we just need it to be queued for writeToCGI
*/
if (req->form) {
maJoinForService(q, packet, 0);
} else {
maPutForService(q, packet, 0);
}
}
if (cmd) {
writeToCGI(q);
}
}
/*
This routine runs after all incoming data has been received
*/
static void runCgi(MaQueue *q)
{
MaResponse *resp;
MaConn *conn;
MprCmd *cmd;
conn = q->conn;
resp = conn->response;
cmd = (MprCmd*) q->queueData;
if (cmd == 0) {
startCgi(q);
cmd = (MprCmd*) q->queueData;
if (q->pair->count > 0) {
writeToCGI(q->pair);
}
}
/*
Close the CGI program's stdin. This will allow it to exit if it was expecting input data.
*/
mprCloseCmdFd(cmd, MPR_CMD_STDIN);
if (conn->requestFailed) {
maPutForService(q, maCreateEndPacket(q), 1);
return;
}
while (mprWaitForCmd(cmd, 1000) < 0) {
if (mprGetElapsedTime(cmd, cmd->lastActivity) >= conn->host->timeout) {
break;
}
}
if (cmd->pid == 0) {
maPutForService(q, maCreateEndPacket(q), 1);
} else {
mprStopCmd(cmd);
mprReapCmd(cmd, MPR_TIMEOUT_STOP_TASK);
cmd->status = 255;
}
}
static void cgiEvent(MaQueue *q, MprCmd *cmd, int channel)
{
MaConn *conn;
MaResponse *resp;
MprBuf *buf;
int space, nbytes, err;
mprLog(cmd, 6, "CGI callback channel %d", channel);
buf = 0;
conn = q->conn;
resp = conn->response;
mprAssert(resp);
cmd->lastActivity = mprGetTime(cmd);
switch (channel) {
case MPR_CMD_STDIN:
writeToCGI(q->pair);
return;
case MPR_CMD_STDOUT:
buf = cmd->stdoutBuf;
break;
case MPR_CMD_STDERR:
buf = cmd->stderrBuf;
break;
}
mprAssert(buf);
mprResetBufIfEmpty(buf);
/*
Come here for CGI stdout, stderr events. ie. reading data from the CGI program.
*/
while (mprGetCmdFd(cmd, channel) >= 0) {
/*
Read as much data from the CGI as possible
*/
do {
if ((space = mprGetBufSpace(buf)) == 0) {
mprGrowBuf(buf, MA_BUFSIZE);
if ((space = mprGetBufSpace(buf)) == 0) {
break;
}
}
nbytes = mprReadCmdPipe(cmd, channel, mprGetBufEnd(buf), space);
mprLog(q, 5, "CGI: read from gateway %d on channel %d. errno %d", nbytes, channel,
nbytes >= 0 ? 0 : mprGetOsError());
if (nbytes < 0) {
err = mprGetError();
if (err == EINTR) {
continue;
} else if (err == EAGAIN || err == EWOULDBLOCK) {
break;
}
mprLog(cmd, 5, "CGI read error %d for %", mprGetError(), (channel == MPR_CMD_STDOUT) ? "stdout" : "stderr");
mprCloseCmdFd(cmd, channel);
} else if (nbytes == 0) {
/*
This may reap the terminated child and thus clear cmd->process if both stderr and stdout are closed.
*/
mprLog(cmd, 5, "CGI EOF for %s", (channel == MPR_CMD_STDOUT) ? "stdout" : "stderr");
mprCloseCmdFd(cmd, channel);
break;
} else {
mprLog(cmd, 5, "CGI read %d bytes from %s", nbytes, (channel == MPR_CMD_STDOUT) ? "stdout" : "stderr");
mprAdjustBufEnd(buf, nbytes);
traceData(cmd, mprGetBufStart(buf), nbytes);
}
} while ((space = mprGetBufSpace(buf)) > 0);
if (mprGetBufLength(buf) == 0) {
return;
}
if (channel == MPR_CMD_STDERR) {
/*
If we have an error message, send that to the client
*/
if (mprGetBufLength(buf) > 0) {
mprAddNullToBuf(buf);
mprLog(conn, 4, mprGetBufStart(buf));
if (writeToClient(q, cmd, buf, channel) < 0) {
return;
}
maSetResponseCode(conn, MPR_HTTP_CODE_SERVICE_UNAVAILABLE);
cmd->userFlags |= MA_CGI_SEEN_HEADER;
cmd->status = 0;
}
} else {
if (!(cmd->userFlags & MA_CGI_SEEN_HEADER) && !parseHeader(conn, cmd)) {
return;
}
if (cmd->userFlags & MA_CGI_SEEN_HEADER) {
if (writeToClient(q, cmd, buf, channel) < 0) {
return;
}
}
}
}
}