EIO_Status CConn_FtpStream::Drain(const STimeout* timeout)
{
const STimeout* r_timeout = kInfiniteTimeout/*0*/;
const STimeout* w_timeout = kInfiniteTimeout/*0*/;
CONN conn = GetCONN();
char block[1024];
if (conn) {
size_t n;
r_timeout = CONN_GetTimeout(conn, eIO_Read);
w_timeout = CONN_GetTimeout(conn, eIO_Write);
_VERIFY(SetTimeout(eIO_Read, timeout) == eIO_Success);
_VERIFY(SetTimeout(eIO_Write, timeout) == eIO_Success);
// Cause any upload-in-progress to abort
CONN_Read (conn, block, sizeof(block), &n, eIO_ReadPlain);
// Cause any command-in-progress to abort
CONN_Write(conn, "NOOP\n", 5, &n, eIO_WritePersist);
}
clear();
while (read(block, sizeof(block)))
;
if (!conn)
return eIO_Closed;
EIO_Status status;
do {
size_t n;
status = CONN_Read(conn, block, sizeof(block), &n, eIO_ReadPersist);
} while (status == eIO_Success);
_VERIFY(CONN_SetTimeout(conn, eIO_Read, r_timeout) == eIO_Success);
_VERIFY(CONN_SetTimeout(conn, eIO_Write, w_timeout) == eIO_Success);
clear();
return status == eIO_Closed ? eIO_Success : status;
}
const STimeout* CConn_IOStream::GetTimeout(EIO_Event direction) const
{
CONN conn = GET_CONN(m_CSb);
return conn ? CONN_GetTimeout(conn, direction) : 0;
}
streamsize CConn_Streambuf::showmanyc(void)
{
static const STimeout kZeroTmo = {0, 0};
_ASSERT(gptr() >= egptr());
if (!m_Conn)
return -1L;
// flush output buffer, if tied up to it
if (m_Tie)
x_sync();
const STimeout* tmo;
const STimeout* timeout = CONN_GetTimeout(m_Conn, eIO_Read);
if (timeout == kDefaultTimeout) {
// HACK * HACK * HACK
tmo = ((SMetaConnector*) m_Conn)->default_timeout;
} else
tmo = timeout;
size_t x_read;
bool backup = false;
if (m_BufSize > 1) {
if (eback() < gptr()) {
x_Buf = gptr()[-1];
backup = true;
}
if (!tmo)
_VERIFY(CONN_SetTimeout(m_Conn, eIO_Read, &kZeroTmo)==eIO_Success);
m_Status = CONN_Read(m_Conn, m_ReadBuf + 1, m_BufSize - 1,
&x_read, eIO_ReadPlain);
if (!tmo)
_VERIFY(CONN_SetTimeout(m_Conn, eIO_Read, timeout) ==eIO_Success);
_ASSERT(x_read > 0 || m_Status != eIO_Success);
} else {
m_Status = CONN_Wait(m_Conn, eIO_Read, tmo ? tmo : &kZeroTmo);
x_read = 0;
}
if (!x_read) {
switch (m_Status) {
case eIO_Success:
_ASSERT(m_BufSize <= 1);
return 1L; // can read at least 1 byte
case eIO_Timeout:
if (!tmo || !(tmo->sec | tmo->usec))
break;
/*FALLTHRU*/
case eIO_Closed:
return -1L; // EOF
default:
break;
}
return 0; // no data available immediately
}
m_ReadBuf[0] = x_Buf;
_ASSERT(m_BufSize > 1);
setg(m_ReadBuf + !backup, m_ReadBuf + 1, m_ReadBuf + 1 + x_read);
x_GPos += x_read;
return x_read;
}