I want to NOT follow the redirect, I want to simply stop the redirect and maybe get some info from the response.
Curl request
Plain request to google.com redirects to google.jp (since I am in Japan)
curl -v http://google.com
...
> GET / HTTP/1.1
> Host: google.com
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 302 Found
< Cache-Control: private
< Content-Type: text/html; charset=UTF-8
< Referrer-Policy: no-referrer
< Location: http://www.google.co.jp/?gfe_rd=cr&ei=iFSUWenOIajEXun8iKAN
< Content-Length: 259
< Date: Wed, 16 Aug 2017 14:19:52 GMT
<
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
...
</HTML>
* Connection #0 to host google.com left intact
Alamofire request
// Prevent automatic redirects
let delegate = Alamofire.SessionManager.default.delegate
delegate.taskWillPerformHTTPRedirection = { (_, _, _, _) -> URLRequest? in
return nil
}
Alamofire.request("http://google.com", method: .get, headers: [:])
.validate(statusCode: 302..<303)
.response { (res: DefaultDataResponse) in
// Make sure "Location" header is present and its url is parsed correctly
guard let response = res.response,
let location = response.allHeaderFields["Location"] as? String,
let url = URL(string: location),
let components = URLComponents(url: url, resolvingAgainstBaseURL: false) else {
return
}
// Make sure we get the query parameter we are interested in
guard let ei = components.queryItems?.first(where: {
return $0.name == "ei" && $0.value != nil && !($0.value!.isEmpty)
})?.value else {
return
}
// Voilà
print("ei query parameter: \(ei)") // iFSUWenOIajEXun8iKAN
}
I skipped the proper error handling, but I think this shows the minimal code required for handling 302 responses.
To restore to original behaviour
Simply assign nil to the handler:
// Restore to original behaviour
let delegate = Alamofire.SessionManager.default.delegate
delegate.taskWillPerformHTTPRedirection = nil
I hope it helps :]
0 comments :
Post a Comment