Possible to redirect AND show content with Sinatra?

问题

I'd like to do a redirect with a Sinatra route AND show a redirection message. So

http://api.mysite.com/product/123.html would do this

redirect product.url, 301

AND output

"redirecting..."

Is this possible, and what would the code look like?

回答1:

From the Sinatra documentation for redirect:

Any additional parameters are handled like arguments passed to halt:

redirect to('/bar'), 303
redirect 'http://google.com', 'wrong place, buddy'

and for halting:

You can also specify the status when halting:

halt 410

Or the body:

halt 'this will be the body'

Or both:

halt 401, 'go away!'

So you can do:

redirect product.url, 301, "redirecting..."

Although the HTTP spec says:

...the entity of the response SHOULD contain a short hypertext note with a hyperlink to the new URI(s).

so you might want to do:

redirect product.url, 301, "redirecting to #{product.url}..."

来源：https://stackoverflow.com/questions/18936716/possible-to-redirect-and-show-content-with-sinatra