It turns out that the suckiness of Zuul with multipart requests
comes almost entirely from the Multipart handling in Spring's
DispatcherServlet. This change makes the proxy routes available
on an alternative path /zuul/<normal_path> (where
/zuul is the default value of zuul.servletPath). I have
tested those with 800MB file uploads using the main method in
the FormZuulServletProxyApplicationTests and the main
observation is that there is no OutOfMemory error (no-one tries
to download the complete request body). It works with Ribbon
and with the simple (HttpClient) filter. With Ribbon you
will need to set some timeouts if you want to upload files
as large as that, e.g. see application.yml in the tests:
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: 60000
ribbon:
ConnectTimeout: 3000
ReadTimeout: 60000
You need to set "Transfer-Encoding: chunked" in the
incoming request. Chrome does not do this by default
apparently, but I was able to test with curl, e.g.
$ curl -v -H "Transfer-Encoding: chunked" \
-F "file=@mylarg.iso" \
localhost:9999/zuul/direct/file
The old proxy paths through the DispatcherServlet are still
available (for backwards compatibility and for convenience of
having the paths available at the root of the context path).
Fixes gh-254
Because of the way that a FormBodyServletRequestWrapper was
implemented (extending the Zuul servlet 2.5 wrapper) it could
barf at runtime if anyone called its servlet 3.0 methods. The fix
for that was to extract our Servlet30RequestWrapper and extend that
instead.
Also tweaked the DebugFilter a bit so it doesn't try and display
the whole payload. Probably speeds up file uploads a bit but the
fact that we have to store the whole request body in memory is
going to kill us eventually.
See gh-254
If you are using AMQP there needs to be a ConnectionFactory (from
Spring Rabbit) in the application context. If there is a single
ConnectionFactory it will be used, or if there is a one qualified as
@[Hystrix,Turbine]ConnectionFactory it will be preferred over others,
otherwise the @Primary one will be used. If there are multiple
unqualified connection factories there will be an error.
See https://github.com/spring-cloud/spring-cloud-bus/issues/13
Listen for heartbeats from discovery so that state changes can trigger
a new status (and the client doesn't rely on the old address of the
server if it has now changed).
Fixes gh-232
It doesn't make sense to @EnableFeignClients in autoconfig
because the user needs to specify a package to scan. It does
make sense (sort of) to set up the encoder/decoder/logger etc.
See gh-226
When the URL is passed down to Ribbon and reconstructed from
a LoadBalancer the Server only knows about host and port, so the scheme
has to come from the original declaration.
There's still a potential problem with Eureka remote services that
are available with a non-secure port as well (probably fairly rare).
Fixes gh-221
Users need to know how to configure and use the Eureka
metadata because it isn't immediately obvious and does
require some decisions to be made.
Fixes gh-102
If the ServerProperties contain a servletPath then the handler mapping
does not contain that prefix, but the incoming request URI does. This leads
to some interesting prefix stripping gymnastics. All the existing tests
assumed that the prefix was empty (the default for a Spring boot app).
See gh-199
and also allow explicitly configured services to be unignored. I.e.
zuul:
ignoredServices: *
routes:
foo: /foo/**
Will expose only the foo service.
Fixes gh-198
Now that blitz4j 1.36.0 is out, with a bit of hackery we can prevent
it from barfing on startup. Seems worth it (and certainly makes
it easier to embed Eureka server).
Fixes gh-3
The Eureka instance has to provide status page and health check
URLs. We only provide a sensible default if the app is a vanilla
Actuator. This change shows users explicitly how to customize those
settings.
Fixes gh-192
The ProxyRouteLocator now has a retryable property (default
null which means Ribbon will choose the default - usually false).
Fixes gh-115, fixes gh-124
