uwsgi-swift

uWSGI plugin for Apple Swift integration

This is a super-experimental plugin aimed at embedding swift apps into uWSGI.

It currently works only on OSX

The plugin includes a swift module from which you can start building better integration:

import Foundation

public func application(s : NSDictionary) -> NSArray {
        print("Hello World")
        print(s["REQUEST_METHOD"])
        print(s)
        print("ready for response")
        let chunk0 : NSData! = "Hello ".dataUsingEncoding(NSUTF8StringEncoding)
        let chunk1 : NSData! = "World".dataUsingEncoding(NSUTF8StringEncoding)
        return ["200 OK", ["Foo": ["Bar", "Ops"]], [chunk0, chunk1]] as NSArray
}

as you can see, Objective-C native types are expected at the lower level, consider making some kind of wrapping to Swift native types (read: re-encode application() arguments to [String : String] and pass it to another swift function)

The plugin is 2.x friendly:

uwsgi --build-plugin https://github.com/unbit/uwsgi-swift

or (once the repository is cloned)

uwsgi --build-plugin uwsgi-swift

The plugin has hardcoded mangled entry point (so do not change function signature or the plugin will crash):

char *symbol_name = "_TF7example11applicationFCSo12NSDictionaryCSo7NSArray";

it maps to example.application function. Feel free to change it and rebuild the plugin (use the nm command line tool to get the symbol name)

To build example.swift as a shared library

xcrun -sdk macosx swiftc -emit-library example.swift 

this will result in libexample.dylib

You can run uWSGI in swift mode with:

uwsgi --dlopen libexample.dylib --plugin swift_plugin.so --swift-func application --http-socket :9090 --threads 50 -p 2 -M

this will run an http server on port 9090 with two processes with 50 threads each.

The memory model of the plugin is still unimplemented, so expect extreme leaks.