[Socket] Read raw stream when using Socket server (no stream)

[cboden]

Re-implementing #209 after a failed merge resolution by me where I favoured #192 instead. Socket server should be using raw socket data, not stream parsed data by using fread.

[igorw]

This PR reverts #192. Using fread caused autobahn tests to fail very oddly. Presumably this is due to some stream filters triggering, which stream_socket_recvfrom bypasses completely. However, the root cause has not been detected yet.

One of the reasons the change to fread happened initially was to potentially support SSL on the server side. The decision has been made to not support that, at least until a solution to the fread problem has been found.

@cboden will post more details about the autobahn failure...

[igorw]

Merged.

[igorw]

@cboden you were going to post some details. DO IT!

[heruan]

Using the ssl branch, I don't understand why fread won't work. I tried to use it and I get an empty string from the socket, but I don't understand why. On the other hand, I would expect stream_socket_recvfrom returning encrypted data, instead it returns false…

[cboden]

@heruan Without more information I'm guessing there was an issue in the SSL handshake negotiation along the way. stream_socket_recvfrom returning false means there was an error reading from the socket.

fread should work but I was coming across a scenario where a stream filter was interpreting my raw data as some kind of format/protocol and hung my connection. So the current implementation has Stream\Stream using fread with stream filters being applied where as Socket\Connection will read the raw bytes from the socket without stream filters being applied.

[heruan]

I'm afraid the issue may be related to PHP bug 65137 when using StreamSelectLoop: stream_select() seems to report available data too early on encrypted streams, therefore fread or stream_socket_recvfrom fail. I'll try with LibEventLoop and report results!

[heruan]

Same result with LibEventLoop, data is reported too early on the encrypted stream and fread returns empty. Calling usleep(100000) before fread does the (awful) trick.

[cboden]

65137 was recently fixed (yay) and would have been a cause for SSL not working - we did verify this in SocketClient. Once PHP 5.6.1 comes out SSL server should be viable.

This issue could be caused by 52602. By default we're reading 4096 bytes at a time but the default buffer seems to be 8192.