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problems with redirect in safari

See original GitHub issue

I have a strage problem on Safari where fetch follows the first redirect, but not the second one (see wireshark log below). On chrome and firefox (native fetch) this works as expected. The simplified flow is:

-> POST on /login
<- 302 found redirect to /
-> OPTIONS
<- 204
-> GET /
-> 302 found redirect to /build/allinOne/lims/lims.html

- fetch ends with error: TypeError: Network request failed

on chrome and ff instead of the error fetch issues a

GET  /build/allinOne/lims/lims.html

from where on everything succeeds

The fetch call is:

fetch(getLimsLogin(), {
            method: 'post',
            body: formData,
            credentials: 'include',
            redirect:'follow', 
            follow:20 
        })

Any Idea what can be wrong?

Thanks Ognian

POST /login HTTP/1.1
Host: localhost:3000
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryuZkJrVCuSqoVuZhK
Origin: http://localhost:3100
Cookie: __utma=111872281.885784303.1429298870.1429298870.1429298870.1; connect.sid=s%3AT-1T4jDYXaItMZ91_Lw1bjnhIoxlKb-e.Dweqx3eWKgx%2BxWNfCHkTRi5axLKsWy8R5T5AdZaDXo0
Content-Length: 240
Connection: keep-alive
Accept: */*
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7
Referer: http://localhost:3100/index.html
Accept-Language: de-de
Accept-Encoding: gzip, deflate

------WebKitFormBoundaryuZkJrVCuSqoVuZhK
Content-Disposition: form-data; name="username"

ogi
------WebKitFormBoundaryuZkJrVCuSqoVuZhK
Content-Disposition: form-data; name="password"

ogi
------WebKitFormBoundaryuZkJrVCuSqoVuZhK--
HTTP/1.1 302 Found
Vary: X-HTTP-Method-Override, Origin, Accept
Access-Control-Allow-Origin: http://localhost:3100
Access-Control-Allow-Credentials: true
Location: /
Content-Type: text/plain; charset=utf-8
Content-Length: 23
Date: Sat, 28 Nov 2015 13:15:20 GMT
Connection: keep-alive

Found. Redirecting to /
OPTIONS / HTTP/1.1
Host: localhost:3000
Origin: http://localhost:3100
Access-Control-Request-Method: GET
Content-Length: 0
Access-Control-Request-Headers: accept-encoding, origin, accept-language
Connection: keep-alive
Accept: */*
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7
Referer: http://localhost:3100/index.html
Accept-Language: de-de
Accept-Encoding: gzip, deflate

HTTP/1.1 204 No Content
Access-Control-Allow-Origin: http://localhost:3100
Vary: Origin
Access-Control-Allow-Credentials: true
Access-Control-Allow-Methods: GET,HEAD,PUT,PATCH,POST,DELETE
Access-Control-Allow-Headers: accept-encoding, origin, accept-language
set-cookie: connect.sid=s%3Al9Hrf_9RmZCW_Q7cMTw8gvWqSnR24sZr.pxwsLiQQ7UZpQTgZWt69Qyc6x1tKXRpeevwW4czwyhY; Path=/; Expires=Sat, 28 Nov 2015 13:45:20 GMT; HttpOnly
Date: Sat, 28 Nov 2015 13:15:20 GMT
Connection: keep-alive

GET / HTTP/1.1
Host: localhost:3000
Origin: http://localhost:3100
Cookie: __utma=111872281.885784303.1429298870.1429298870.1429298870.1; connect.sid=s%3AT-1T4jDYXaItMZ91_Lw1bjnhIoxlKb-e.Dweqx3eWKgx%2BxWNfCHkTRi5axLKsWy8R5T5AdZaDXo0
Connection: keep-alive
Accept: */*
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7
Accept-Language: de-de
Referer: http://localhost:3100/index.html
Accept-Encoding: gzip, deflate

HTTP/1.1 302 Found
Access-Control-Allow-Origin: http://localhost:3100
Vary: Origin, Accept
Access-Control-Allow-Credentials: true
Location: /build/allinOne/lims/lims.html
Content-Type: text/plain; charset=utf-8
Content-Length: 52
Date: Sat, 28 Nov 2015 13:15:20 GMT
Connection: keep-alive

Found. Redirecting to /build/allinOne/lims/lims.html