From bfbb4a94db155b9f033129b943c42ea9076c51af Mon Sep 17 00:00:00 2001
From: Peter Thorson <github@zaphoyd.com>
Date: Sat, 6 Apr 2013 15:30:58 -0500
Subject: [PATCH] adds an example to demonstrate subprotocol negotiation

---
 SConstruct                                    |  3 ++
 examples/subprotocol_server/SConscript        | 23 ++++++++
 .../subprotocol_server/subprotocol_server.cpp | 52 +++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 examples/subprotocol_server/SConscript
 create mode 100644 examples/subprotocol_server/subprotocol_server.cpp

diff --git a/SConstruct b/SConstruct
index 45ea5b6194..ec0d956a2b 100644
--- a/SConstruct
+++ b/SConstruct
@@ -194,6 +194,9 @@ broadcast_server = SConscript('#/examples/broadcast_server/SConscript',variant_d
 # echo_client
 echo_client = SConscript('#/examples/echo_client/SConscript',variant_dir = builddir + 'echo_client',duplicate = 0)
 
+# subprotocol_server
+subprotocol_server = SConscript('#/examples/subprotocol_server/SConscript',variant_dir = builddir + 'subprotocol_server',duplicate = 0)
+
 #
 #wsperf = SConscript('#/examples/wsperf/SConscript',
 #                    variant_dir = builddir + 'wsperf',
diff --git a/examples/subprotocol_server/SConscript b/examples/subprotocol_server/SConscript
new file mode 100644
index 0000000000..2ce12359f1
--- /dev/null
+++ b/examples/subprotocol_server/SConscript
@@ -0,0 +1,23 @@
+## Main development example
+##
+
+Import('env')
+Import('env_cpp11')
+Import('boostlibs')
+Import('platform_libs')
+Import('polyfill_libs')
+
+env = env.Clone ()
+env_cpp11 = env_cpp11.Clone ()
+
+prgs = []
+
+# if a C++11 environment is avaliable build using that, otherwise use boost
+if env_cpp11.has_key('WSPP_CPP11_ENABLED'):
+   ALL_LIBS = boostlibs(['system'],env_cpp11) + [platform_libs] + [polyfill_libs]
+   prgs += env_cpp11.Program('subprotocol_server', ["subprotocol_server.cpp"], LIBS = ALL_LIBS)
+else:
+   ALL_LIBS = boostlibs(['system','regex'],env) + [platform_libs] + [polyfill_libs]
+   prgs += env.Program('subprotocol_server', ["subprotocol_server.cpp"], LIBS = ALL_LIBS)
+
+Return('prgs')
diff --git a/examples/subprotocol_server/subprotocol_server.cpp b/examples/subprotocol_server/subprotocol_server.cpp
new file mode 100644
index 0000000000..0cdc1d0cd0
--- /dev/null
+++ b/examples/subprotocol_server/subprotocol_server.cpp
@@ -0,0 +1,52 @@
+#include <iostream>
+
+#include <websocketpp/config/asio_no_tls.hpp>
+#include <websocketpp/server.hpp>
+
+typedef websocketpp::server<websocketpp::config::asio> server;
+
+using websocketpp::connection_hdl;
+using websocketpp::lib::placeholders::_1;
+using websocketpp::lib::placeholders::_2;
+using websocketpp::lib::bind;
+using websocketpp::lib::ref;
+
+
+bool validate(server & s, connection_hdl hdl) {
+    server::connection_ptr con = s.get_con_from_hdl(hdl);
+    
+    std::cout << "Cache-Control: " << con->get_request_header("Cache-Control") << std::endl;
+    
+    const std::vector<std::string> & subp_requests = con->get_requested_subprotocols();
+    std::vector<std::string>::const_iterator it;
+    
+    for (it = subp_requests.begin(); it != subp_requests.end(); ++it) {
+        std::cout << "Requested: " << *it << std::endl;
+    }
+    
+    if (subp_requests.size() > 0) {
+        con->select_subprotocol(subp_requests[0]);
+    }
+    
+    return true;
+}
+
+int main() {
+    try {
+        server s;
+
+        s.set_validate_handler(bind(&validate,ref(s),::_1));
+
+        s.init_asio();
+        s.listen(9005);
+        s.start_accept();
+
+        s.run();
+    } catch (const std::exception & e) {
+        std::cout << e.what() << std::endl;
+    } catch (websocketpp::lib::error_code e) {
+        std::cout << e.message() << std::endl;
+    } catch (...) {
+        std::cout << "other exception" << std::endl;
+    }
+}
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