build example/websocket failed

[Kiritimati]

Build /example/websocket failed at 2 errors:

/home/myvirtual/includeos/includeos/x86_64/include/libcxx/memory:3957:1: error: no type named ‘type’ in ‘struct std::__1::enable_if<false, std::__1::shared_ptr<std::__1::vector<unsigned char, std::experimental::fundamentals_v1::pmr::polymorphic_allocator > >::__nat>’
shared_ptr<_Tp>::shared_ptr(_Yp* __p,

error: no matching function for call to ‘net::WebSocket::write(std::__1::shared_ptr<std::__1::vector >)’
ws->write(msg->extract_shared_vector());
^~

Is it a bug? What shuold I do?

[fwsGonzo]

Yea, thats a bug. It happened after a change from a normal vector to one using a polymorphic allocator.
Probably a simple fix as its just a matter of changing the extract_shared_vector function return type.

[AbdulTade]

Hi all, please has this issue been fixed

[alfreb]

Hi, that example is no longer there, but seems to live here: https://github.com/includeos/demo-examples/tree/master/websocket

Those examples are not actively maintained, but we hope to get to them eventually.

If anyone is interested in helping out with websockets there's a websocket test in ./test/net/integration/websocket. I was able to test this today and unfortunately it seems to have regressed with the newer version of the http parser - that goes for the http test as well; they both compile, but don't linke due to some unresolved symbols.

I've done a pass over all integration tests and fixed quite a few here:
#2260

The websocket test is added to the exclusion list here, until it can be fixed:

IncludeOS/test.sh

Line 157 in ba577ae

"websocket" # Linking fails, undefined ref to http_parser_parse_url, http_parser_execute

To debug that specific test:

• nix-shell --argstr unikernel ./test/net/integration/http/ --run "./test.py" will attempt to build and run the test - when this succeeds we can re-enable the test.
• nix-shell --argstr unikernel ./test/net/integration/http/ --argstr buildpath ~/your/preferred/debugging/space will attempt to build and then drop you into a nix-shell suitable for debugging. Typing make in there will show you the linker error.

The integration tests depend on vmrunner to be installed:
https://github.com/includeos/vmrunner

NOTE: All of this is in v0.16.0-release which is the only active branch.