server sends bad request when there is no whitespace in http header

[mariusre]

Hey there,

the server replies "Bad Request" when there is no whitespace between header-key and value.
Here is an example:

curl -v -H 'Accept:*/*' '192.168.178.144:8081/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219'

Results in:

*   Trying 192.168.178.144...
* TCP_NODELAY set
* Connected to 192.168.113.144 (192.168.178.144) port 8081 (#0)
> GET /table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219 HTTP/1.1
> Host: 192.168.178.144:8081
> User-Agent: curl/7.58.0
> Accept:*/*
> 
* HTTP 1.0, assume close after body
< HTTP/1.0 400 Bad Request
< Access-Control-Allow-Origin: *
< Content-Length: 0
< Content-Type: text/html
< 
* Closing connection 0

But this is working:

curl -v -H 'Accept: */*' '192.168.178.144:8081/table/v1/driving/13.388860,52.517037;13.397634,52.529407;13.428555,52.523219'

The only difference between the two requests is one whitespace in the Accept-header. This whitespace is optional. For reference see here (in 3.2).
So the server should be able to deal with requests without whitespace in headers.