/*
Read data. If sync mode, this will block. If async, will never block.
Will return what data is available up to the requested size.
Returns a count of bytes read. Returns zero if not data. EOF if returns zero and conn->state is > HTTP_STATE_CONTENT.
*/
PUBLIC ssize httpRead(HttpConn *conn, char *buf, ssize size)
{
HttpPacket *packet;
HttpQueue *q;
MprBuf *content;
ssize nbytes, len;
q = conn->readq;
assert(q->count >= 0);
assert(size >= 0);
VERIFY_QUEUE(q);
while (q->count <= 0 && !conn->async && !conn->error && conn->sock && (conn->state <= HTTP_STATE_CONTENT)) {
httpServiceQueues(conn);
if (conn->sock) {
httpWait(conn, 0, MPR_TIMEOUT_NO_BUSY);
}
}
conn->lastActivity = conn->http->now;
for (nbytes = 0; size > 0 && q->count > 0; ) {
if ((packet = q->first) == 0) {
break;
}
content = packet->content;
len = mprGetBufLength(content);
len = min(len, size);
assert(len <= q->count);
if (len > 0) {
len = mprGetBlockFromBuf(content, buf, len);
assert(len <= q->count);
}
buf += len;
size -= len;
q->count -= len;
assert(q->count >= 0);
nbytes += len;
if (mprGetBufLength(content) == 0) {
httpGetPacket(q);
}
}
assert(q->count >= 0);
if (nbytes < size) {
buf[nbytes] = '\0';
}
return nbytes;
}
/*
Read data. If sync mode, this will block. If async, will never block.
Will return what data is available up to the requested size.
Timeout in milliseconds to wait. Set to -1 to use the default inactivity timeout. Set to zero to wait forever.
Returns a count of bytes read. Returns zero if no data. EOF if returns zero and conn->state is > HTTP_STATE_CONTENT.
*/
PUBLIC ssize httpReadBlock(HttpConn *conn, char *buf, ssize size, MprTicks timeout, int flags)
{
HttpPacket *packet;
HttpQueue *q;
HttpLimits *limits;
MprBuf *content;
MprTicks start, delay;
ssize nbytes, len;
int64 dispatcherMark;
q = conn->readq;
assert(q->count >= 0);
assert(size >= 0);
limits = conn->limits;
if (flags == 0) {
flags = conn->async ? HTTP_NON_BLOCK : HTTP_BLOCK;
}
if (timeout < 0) {
timeout = limits->inactivityTimeout;
} else if (timeout == 0) {
timeout = MPR_MAX_TIMEOUT;
}
if (flags & HTTP_BLOCK) {
start = conn->http->now;
dispatcherMark = mprGetEventMark(conn->dispatcher);
while (q->count <= 0 && !conn->error && (conn->state <= HTTP_STATE_CONTENT)) {
if (httpRequestExpired(conn, -1)) {
break;
}
delay = min(limits->inactivityTimeout, mprGetRemainingTicks(start, timeout));
httpEnableConnEvents(conn);
mprWaitForEvent(conn->dispatcher, delay, dispatcherMark);
if (mprGetRemainingTicks(start, timeout) <= 0) {
break;
}
dispatcherMark = mprGetEventMark(conn->dispatcher);
}
}
for (nbytes = 0; size > 0 && q->count > 0; ) {
if ((packet = q->first) == 0) {
break;
}
content = packet->content;
len = mprGetBufLength(content);
len = min(len, size);
assert(len <= q->count);
if (len > 0) {
len = mprGetBlockFromBuf(content, buf, len);
assert(len <= q->count);
}
buf += len;
size -= len;
q->count -= len;
assert(q->count >= 0);
nbytes += len;
if (mprGetBufLength(content) == 0) {
httpGetPacket(q);
}
if (flags & HTTP_NON_BLOCK) {
break;
}
}
assert(q->count >= 0);
if (nbytes < size) {
buf[nbytes] = '\0';
}
return nbytes;
}
