bool
HTTPRemotingHandler::advance()
{
#ifdef GNASH_DEBUG_REMOTING
log_debug("advancing HTTPRemotingHandler");
#endif
if (_connection) {
#ifdef GNASH_DEBUG_REMOTING
log_debug("have connection");
#endif
// Fill last chunk before reading in the next
size_t toRead = reply.capacity() - reply.size();
if (! toRead) toRead = NCCALLREPLYCHUNK;
#ifdef GNASH_DEBUG_REMOTING
log_debug("Attempt to read %d bytes", toRead);
#endif
// See if we need to allocate more bytes for the next
// read chunk
if (reply.capacity() < reply.size() + toRead) {
// if _connection->size() >= 0, reserve for it, so
// if HTTP Content-Length response header is correct
// we'll be allocating only once for all.
const size_t newCapacity = reply.size() + toRead;
#ifdef GNASH_DEBUG_REMOTING
log_debug("NetConnection.call: reply buffer capacity (%d) "
"is too small to accept next %d bytes of chunk "
"(current size is %d). Reserving %d bytes.",
reply.capacity(), toRead, reply.size(), newCapacity);
#endif
reply.reserve(newCapacity);
#ifdef GNASH_DEBUG_REMOTING
log_debug(" after reserve, new capacity is %d", reply.capacity());
#endif
}
const int read =
_connection->readNonBlocking(reply.data() + reply.size(), toRead);
if (read > 0) {
#ifdef GNASH_DEBUG_REMOTING
log_debug("read '%1%' bytes: %2%", read,
hexify(reply.data() + reply.size(), read, false));
#endif
reply.resize(reply.size() + read);
}
// There is no way to tell if we have a whole amf reply without
// parsing everything
//
// The reply format has a header field which specifies the
// number of bytes in the reply, but potlatch sends 0xffffffff
// and works fine in the proprietary player
//
// For now we just wait until we have the full reply.
//
// FIXME make this parse on other conditions, including: 1) when
// the buffer is full, 2) when we have a "length in bytes" value
// thas is satisfied
if (_connection->bad()) {
log_debug("connection is in error condition, calling "
"NetConnection.onStatus");
reply.resize(0);
reply_start = 0;
// reset connection before calling the callback
_connection.reset();
// This is just a guess, but is better than sending
// 'undefined'
_nc.notifyStatus(NetConnection_as::CALL_FAILED);
}
else if (_connection->eof()) {
if (reply.size() > 8) {
#ifdef GNASH_DEBUG_REMOTING
log_debug("hit eof");
#endif
boost::uint16_t li;
const boost::uint8_t *b = reply.data() + reply_start;
const boost::uint8_t *end = reply.data() + reply.size();
amf::Reader rd(b, end, getGlobal(_nc.owner()));
// parse header
b += 2; // skip version indicator and client id
// NOTE: this looks much like parsing of an OBJECT_AMF0
boost::int16_t si = readNetworkShort(b);
b += 2; // number of headers
uint8_t headers_ok = 1;
if (si != 0) {
#ifdef GNASH_DEBUG_REMOTING
log_debug("NetConnection::call(): amf headers "
"section parsing");
#endif
as_value tmp;
for (size_t i = si; i > 0; --i) {
if(b + 2 > end) {
headers_ok = 0;
break;
}
si = readNetworkShort(b); b += 2; // name length
if(b + si > end) {
headers_ok = 0;
break;
}
std::string headerName((char*)b, si); // end-b);
#ifdef GNASH_DEBUG_REMOTING
log_debug("Header name %s", headerName);
#endif
b += si;
if ( b + 5 > end ) {
headers_ok = 0;
break;
}
b += 5; // skip past bool and length long
if(!rd(tmp)) {
headers_ok = 0;
break;
}
#ifdef GNASH_DEBUG_REMOTING
log_debug("Header value %s", tmp);
#endif
{ // method call for each header
// FIXME: it seems to me that the call should happen
VM& vm = getVM(_nc.owner());
string_table& st = vm.getStringTable();
string_table::key key = st.find(headerName);
#ifdef GNASH_DEBUG_REMOTING
log_debug("Calling NetConnection.%s(%s)",
headerName, tmp);
#endif
callMethod(&_nc.owner(), key, tmp);
}
}
}
if(headers_ok == 1) {
si = readNetworkShort(b); b += 2; // number of replies
// TODO consider counting number of replies we
// actually parse and doing something if it
// doesn't match this value (does it matter?
if(si > 0) {
// parse replies until we get a parse error or we reach the end of the buffer
while(b < end) {
if(b + 2 > end) break;
si = readNetworkShort(b); b += 2; // reply length
if(si < 4) { // shorted valid response is '/1/a'
log_error("NetConnection::call(): reply message name too short");
break;
}
if(b + si > end) break;
// Reply message is: '/id/methodName'
int ns = 1; // next slash position
while (ns<si-1 && *(b+ns) != '/') ++ns;
if ( ns >= si-1 ) {
std::string msg(
reinterpret_cast<const char*>(b), si);
log_error("NetConnection::call(): invalid "
"reply message name (%s)", msg);
break;
}
std::string id(reinterpret_cast<const char*>(b),
ns);
std::string methodName(
reinterpret_cast<const char*>(b+ns+1),
si-ns-1);
b += si;
// parse past unused string in header
if(b + 2 > end) break;
si = readNetworkShort(b); b += 2; // reply length
if(b + si > end) break;
b += si;
// this field is supposed to hold the
// total number of bytes in the rest of
// this particular reply value, but
// openstreetmap.org (which works great
// in the adobe player) sends
// 0xffffffff. So we just ignore it
if(b + 4 > end) break;
li = readNetworkLong(b); b += 4; // reply length
#ifdef GNASH_DEBUG_REMOTING
log_debug("about to parse amf value");
#endif
// this updates b to point to the next unparsed byte
as_value replyval;
if (!rd(replyval)) {
log_error("parse amf failed");
// this will happen if we get
// bogus data, or if the data runs
// off the end of the buffer
// provided, or if we get data we
// don't know how to parse
break;
}
#ifdef GNASH_DEBUG_REMOTING
log_debug("parsed amf");
#endif
// update variable to show how much we've parsed
reply_start = b - reply.data();
// if actionscript specified a callback object,
// call it
as_object* callback = pop_callback(id);
if (callback) {
string_table::key methodKey;
if ( methodName == "onResult" ) {
methodKey = NSV::PROP_ON_RESULT;
}
else if (methodName == "onStatus") {
methodKey = NSV::PROP_ON_STATUS;
}
else {
// NOTE: the pp is known to actually
// invoke the custom method, but with 7
// undefined arguments (?)
log_error("Unsupported HTTP Remoting "
"response callback: '%s' "
"(size %d)", methodName,
methodName.size());
continue;
}
#ifdef GNASH_DEBUG_REMOTING
log_debug("calling onResult callback");
#endif
// FIXME check if above line can fail and we
// have to react
callMethod(callback, methodKey, replyval);
#ifdef GNASH_DEBUG_REMOTING
log_debug("callback called");
#endif
} else {
log_error("Unknown HTTP Remoting response identifier '%s'", id);
}
}
}
}
}
else
{
log_error("Response from remoting service < 8 bytes");
}
#ifdef GNASH_DEBUG_REMOTING
log_debug("deleting connection");
#endif
_connection.reset();
reply.resize(0);
reply_start = 0;
}
}
if(!_connection && queued_count > 0) {
//#ifdef GNASH_DEBUG_REMOTING
log_debug("creating connection");
//#endif
// set the "number of bodies" header
(reinterpret_cast<boost::uint16_t*>(_postdata.data() + 4))[0] = htons(queued_count);
std::string postdata_str(reinterpret_cast<char*>(_postdata.data()), _postdata.size());
#ifdef GNASH_DEBUG_REMOTING
log_debug("NetConnection.call(): encoded args from %1% calls: %2%", queued_count, hexify(postdata.data(), postdata.size(), false));
#endif
queued_count = 0;
// TODO: it might be useful for a Remoting Handler to have a
// StreamProvider member
const StreamProvider& sp =
getRunResources(_nc.owner()).streamProvider();
_connection.reset(sp.getStream(_url, postdata_str, _headers).release());
_postdata.resize(6);
#ifdef GNASH_DEBUG_REMOTING
log_debug("connection created");
#endif
}
if (_connection == 0) {
// nothing more to do
return false;
}
return true;
}
