EventSource (node.js 与 OC)

node.js服务器代码:

var http = require('http');

http.createServer(function (req, res) {
    res.writeHead(200, { 'Transfer-Encoding': 'chunked', 'Content-Type': 'text/event-stream' });
 
    setInterval(function() { 
        var packet = 'event: hello_event\ndata: {"message":"' + new Date().getTime() + '"}\n\n'; 
        res.write(packet); 
    }, 1000);
}).listen(9009);

 OC代码(需要借助封装的类:EventSource)

    EventSource *source = [EventSource eventSourceWithURL:[NSURL URLWithString:@"http://127.0.0.1:9009/"]];
    [source onReadyStateChanged:^(Event *event) {
        NSLog(@"READYSTATE: %@", event);
    }];

    [source addEventListener:@"hello_event" handler:^(Event *e) {
        NSLog(@"%@: %@", e.event, e.data);
    }];