Context in AngelScript

Here’s the translation of the Go code example to AngelScript, formatted in Markdown suitable for Hugo:

Our example demonstrates how to use context for controlling cancellation in an HTTP server. A context carries deadlines, cancellation signals, and other request-scoped values across API boundaries and functions.

#include <angelscript.h>
#include <scriptbuilder/scriptbuilder.h>
#include <scriptstdstring/scriptstdstring.h>
#include <datetime/datetime.h>
#include <scriptarray/scriptarray.h>

void hello(string& in, string& out)
{
    print("server: hello handler started");
    
    // Simulate work
    uint64 startTime = getSystemTime();
    while (getSystemTime() - startTime < 10000) // 10 seconds
    {
        // Check for cancellation
        if (isCancellationRequested())
        {
            print("server: request canceled");
            out = "Internal Server Error: Request canceled";
            return;
        }
        
        // Yield to allow other operations
        yield();
    }
    
    out = "hello\n";
    print("server: hello handler ended");
}

void main()
{
    // Register the hello function with the HTTP server
    registerHttpHandler("/hello", hello);
    
    // Start the HTTP server
    startHttpServer(8090);
}

In this AngelScript version:

1. We include necessary headers for AngelScript and some hypothetical utility libraries.

2. The hello function simulates the handler. It takes input and output strings as parameters.

3. We use a simple loop to simulate work, checking for cancellation periodically.

4. The isCancellationRequested() function is a hypothetical function that would check if the request has been canceled.

5. We use yield() to allow other operations to proceed, simulating cooperative multitasking.

6. In the main function, we register the handler and start the server.

To run the server:

$ angelscript context.as &

Simulate a client request to /hello, interrupting it shortly after starting:

$ curl localhost:8090/hello
server: hello handler started
^C
server: request canceled
server: hello handler ended

This example demonstrates how to implement cancellation in AngelScript, although the exact implementation would depend on the specific AngelScript environment and available libraries. The concept of context and cancellation is simulated using a cancellation check in a loop, which is a common pattern in single-threaded or cooperative multitasking environments.