用外部URL响应请求

Question

I'd like to respond to a particular request in different ways based on the referrer. The code is pretty simple:

app.get('/test', function(req, res) {        
    if (req.headers.accept.indexOf('image') != -1) {
        res.sendfile('http://example.com/someimage.png');
    } else {
        res.render('views/index');
    }
});

Basically, in the first conditional, I'd just like to 'pass long' an image from an external URL. I assume I may have to stream this file through my server, but is there another way to just pass the link directly?

Answer 1

Yes, assuming you use express as it seems, you can use redirect :

res.redirect('http://example.com/someimage.png');

If you want the browser to consider the new URL as permanent, add the relevant status code :

res.redirect(301, 'http://example.com/someimage.png');