added code and data for the 2024-11-27 Milano presentation

bemanproject · Nov 28, 2024 · 12faf5b · 12faf5b
1 parent 5e10a31
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diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
@@ -10,6 +10,7 @@ set(EXAMPLES
   client
   task
   cppcon-2024
+  milano
 )
 
 foreach(EXAMPLE ${EXAMPLES})

diff --git a/examples/data/index-milano.html b/examples/data/index-milano.html
@@ -0,0 +1,10 @@
+<html>
+   <head>
+       <title>Ciao Milano!</title>
+   </head>
+   <body>
+       <img src="/logo.png"/>
+       <h1>Ciao Milano!</h1>
+       <img src="/itcpp.png"/>
+   </body>
+</html>
diff --git a/examples/data/itcpp.png b/examples/data/itcpp.png
diff --git a/examples/milano.cpp b/examples/milano.cpp
@@ -0,0 +1,97 @@
+// examples/http-server.cpp                                           -*-C++-*-
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#include <beman/net29/net.hpp>
+#include <beman/execution26/execution.hpp>
+#include "demo_algorithm.hpp"
+#include "demo_error.hpp"
+#include "demo_scope.hpp"
+#include "demo_task.hpp"
+#include <iostream>
+#include <string>
+#include <fstream>
+#include <sstream>
+#include <string_view>
+#include <unordered_map>
+
+namespace ex  = beman::execution26;
+namespace net = beman::net29;
+using namespace std::chrono_literals;
+
+// ----------------------------------------------------------------------------
+
+std::unordered_map<std::string, std::string> files{
+    {"/", "examples/data/index-milano.html"},
+    {"/favicon.ico", "examples/data/favicon.ico"},
+    {"/logo.png", "examples/data/logo.png"},
+    {"/itcpp.png", "examples/data/itcpp.png"},
+};
+
+auto timeout(auto scheduler, auto dur, ex::sender auto sender) {
+    return demo::when_any(
+        net::resume_after(scheduler, dur)
+          | demo::into_error([]{ return std::error_code(); }),
+        std::move(sender)
+    );
+}
+
+using on_exit = std::unique_ptr<char const, decltype([](auto msg){ std::cout << msg << "\n"; })>;
+demo::task<> run_client(auto client, auto s) {
+    on_exit exit("client exiting");
+    char buffer[8194];
+    std::ostringstream out;
+    try {
+    while (true) {
+        auto n = co_await timeout(s, 1s, net::async_receive(client, net::buffer(buffer)));
+        if (n == 0u)
+            co_return;
+        // std::cout << "received=" << std::string_view(buffer, n) << "\n";
+        std::istringstream in(std::string(buffer, n));
+        std::string method, url, version;
+        if (!(in >> method >> url >> version))
+           co_return;
+        auto it = files.find(url);
+        std::cout << "url=" << url << " found=" << (it == files.end()? "no": "yes") << "\n";
+        std::string content;
+        if (it != files.end()) {
+            std::ifstream fin(it->second);
+            out.str({});
+            out << fin.rdbuf();
+            content = out.str();
+        }
+        out.str(std::string());
+        out << "HTTP/1.1 200 found\r\n"
+            << "Content-Length: " << content.size() << "\r\n"
+            << "\r\n"
+            << content;
+
+        content = out.str();
+        co_await net::async_send(client, net::buffer(content));
+        //break;
+    }
+    } catch (std::exception const& ex) {
+        std::cout << "received timeout! ex=" << ex.what() << "\n";
+    } catch (...) {
+        std::cout << "received timeout!\n";
+    }
+}
+
+auto main() -> int
+{
+    demo::scope scope;
+    net::io_context context;
+
+    scope.spawn([](auto& context, auto& scope)->demo::task<> {
+        net::ip::tcp::endpoint ep(net::ip::address_v4::any(), 12345);
+        net::ip::tcp::acceptor acceptor(context, ep);
+        while (true) {
+           auto[client, address] = co_await net::async_accept(acceptor);
+           std::cout << "received a connection from " << address << "\n";
+           scope.spawn(run_client(std::move(client), context.get_scheduler()));
+        }
+    }(context, scope));
+
+    context.run();
+
+
+}
-Original file line number
+Diff line change
@@ Expand Up / @@ -10,6 +10,7 @@ set(EXAMPLES @@
       client
       task
       cppcon-2024
+      milano
     )
     foreach(EXAMPLE ${EXAMPLES})
@@ Expand Down @@