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Avoids syslog/journal warning like:
> Use of uninitialized value $v in substitution (s///) at
> /usr/share/perl5/PVE/APIServer/AnyEvent.pm line 648.
If one passes a "value-less" GET argument to a request, e.g.,
GET /?debug
Besides the fact that this allows us to even use such arguments it
also is a general improvement against a slight "syslog DOS attack",
because anybody can pass such parameters to the '/' page, and all
proxmox daemons providing a API/UI using libpve-http-server-perl
allow to do such requests unauthenticated (which itself is OK, as
else one could not show the login window at all). As each of such
request produces two log lines in the syslog/journal it's far from
ideal.
A simple reproducer of the possible outcome can be seen with the
following shell script using curl:
> PVEURL='127.0.0.1'
> ARGS='?a'; # send multiple args at once to amplify the per-connection cost
> for c in {a..z}; do for i in {0..9}; do ARGS="$ARGS&$c$i"; done; done
> while true; do curl --insecure --silent --output /dev/null "https://$PVEURL:8006$ARGS"; done
Not really bad, but not nice either, as logging is not too cheap this
has some resource usage cost and noise in the syslog is never nice.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
(cherry picked from commit 4a09623bbdb4306ca00685a0f80ce6f05fa42f3b)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This fixes the simple-demo, which was regressed with commit
8782148642e4a09c5852781ec057017cc1145f17 were we falsely assumed that
we always have an rpcenv instance here, but actually that's just
optional as it comes from our child class instance
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
(part. cherry picked from commit e52d940029c184fe76e7fd93bf5c09476b3a77bb)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
(cherry picked from commit 8a29f1fce9dbcb25a46cd68caff0300a872afc07)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
(cherry picked from commit e6dc4ff34675b17aa63949987a0a7c66796cfab3)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
(cherry picked from commit 584d34a7de4c18b1237f6b443b812b76d1bf162f)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Effective the same approach used in libanyevent-perl 7.140-3[0]
Stretch is also compatible with this, and we can remove it for
buster/PVE 6 once the libanyevent-perl package transitioned to
from unstable to buster, until then do it ourself to have a
functioning api/proxy...
[0]: 7f3d5721bb
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
move the read_proxy_conf method into a new perl module
'PVE::APIServer::Utils'.
It now takes the proxy_name (e.g. pveproxy, pmgproxy) as variable to be used
for the configfile location (/etc/default/$proxy_name)
This serves as preparation to make pmgproxy configurable in the same way as
pveproxy.
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
compression is set to true by default, and we only want to be able to
switch it off, not force it on.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
By making compression configurable the $nocomp flag in response got set to
the configured (or default) setting, irrespective of the explicitly passed
value to response.
This broke (e.g.) noVNC connections
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Rationale for disabling compression is the potential for being affected by
the BREACH (CVE-2013-3587) attack and it's considered good practice for https
configuration (see e.g. [0]).
The default remains: to have compression enabled for compressible file-types.
[0] https://cipherli.st/
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Needed to fix#2069.
Prefering the ciphers set in the server, instead of relying on the offer of the
client is considered good practice in TLS1.[012] (see e.g. [0]).
[0] https://cipherli.st/
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
commit a4d8bbafbe400be78bebeab169963025dc46e29b
introduced an additional empty line after '200 OK'
for remote-viewer 7 to work, but we also have to read this line
in our own proxy reader else the connection to a remote node does
not work
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
the glib implementation of the http proxy correctly checks the
http response (response code, followed by an empty line)
so we need to answer with the correct status
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
AnyEvent checks rbuf_max after calling the callback (too late), so
we can receive larger data, because AnyEvent uses MAX_READ_SIZE=131072
to fill the buffer.
So a more elegant solution is to set $max_payload_size=128*1024. At least
I am not able to receive rbuf larger than 128*1024 now. But I keep the
protection from the previous patch - just to be sure.
The given patch fixes incoming WebSocket traffic behind buffered Proxies
like NGINX.
NGINX buffers multiple requests from the Browser into one frame and sends that to pveproxy,
before this patch we then processed the first message of the frame and cleared the buffer which
may contained more messages.
With this patch we process each message and clear the buffer right.
This fixes the "NoVNC blank screen" problem users reported on the forums.
Allows to fix a problem where a logged in connected client was logged
out because we could not verify him for this call as the cluster
filesystem was unavailable.
If we get such a exception then use it for responding.
THis is save as no logged out client can get ever do anything where
login privileges are required and a logged in client cannot to
anything during the problematic period, but does not gets logged out.
Partail fix for #1589
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
those are needed for the noVNC upgrade
svg: button images
mp3/oga: bell sound of terminal
json: language files
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
this matches also our wbuf_max settings of our AnyEvent handle
Tested with 1000 parallel started dummy POST request with 64KB
payload, wh
It should not be too problematic to increase the limit
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Previously, we called decode_utf8_parameters(), which only encoded
some parameters. This was just an optimization, and it turend out to
be error prone (for example passwords also contain utf8 parameters).
