socker | CRUD over engine.io websockets | REST library
kandi X-RAY | socker Summary
kandi X-RAY | socker Summary
use middlewares to process incoming data. give a response on incoming "requests". use routing to structure your apps. handle errors in the same way as in express.
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QUESTION
First time using IO Completion Ports. I'm having an issue where the GetQueuedCompletionStatus returns a Null for the Completion Key, which I am using to pass a data struct with handles for other portions of the code. The GetQueuedCompletionStatus seems to be triggering off messages received just fine otherwise.
I tried to include just the code involving the IO Completion ports:
The Data Structs:
...ANSWER
Answered 2021-Jun-14 at 14:36Any Ideas why the IOCP is not passing the Completion Key?
of course it passing back exactly what you pass to CreateIoCompletionPort
and I/O in place pointer to OVERLAPPED
but at first
QUESTION
I have configured a pod
as follows:
ANSWER
Answered 2021-Mar-20 at 05:48initialDelaySeconds
: Number of seconds after the container has started before liveness or readiness probes are initiated.
Now pod can get failed because of CrashLoopBackOff
even before starting the probes. This is the concept here. It can occur if you set the container restartPolicy
to Never
.
You can see the pod logs or events for getting the reason of pod failure (can use kubectl describe
)
QUESTION
I have a simple multicast writer and reader pair that uses WinSock (code below). If I do not specify the IP address to multicast from (using IP_MULTICAST_IF), I can read the multicast using a socket bound to INADDR_ANY. If I use IP_MULTICAST_IF to send the multicast via 127.0.0.1, reading using INADDR_ANY does not work. It seems like binding the reading socker to 127.0.0.1 is the only way to see a multicast sent via 127.0.0.1. This is unexpected, as I thought INADDR_ANY also listened to the loopback address. Is there a way to have a multicast reader get all multicasts regardless of which IP address is used to send the multicast?
...ANSWER
Answered 2020-Nov-24 at 16:22For anyone else interested in this, I did not find a way to get "ANY" to also get loopback multicasts. I eventually settled on just adding membership to the ANY adapter and the loopback address. Receiver code below. I did have some issues with memberships to 127.0.0.1 getting stick, but ignoring the error code seemed to allow everything to work.
QUESTION
I am using Protobuf to change data between computers with sockets. To transfer the data I'm using the following:
...ANSWER
Answered 2020-Nov-09 at 11:04The string serialized from a protobuf message is a binary string. You cannot construct a std::string
with a single binary char pointer. Instead, you should also specify the size of the binary string.
QUESTION
I am surprised that I need third-party services such as Pusher or Redis to have a bidirectional communication from my server to my clients through WebSockets.
What are the advantages of Pusher over Redis or simply a socker.io
server aside from nginx
? I see many disadvantages:
- Rely on a third-party service
- Pricy above 200k messages a day
- Cannot work on LAN without Internet
From my understanding, they are only two possible solutions with Laravel:
- Laravel Echo + Redis
- Pusher
- Laravel Websockets
- Pusher Php Server
Is there a third alternative?
...ANSWER
Answered 2020-Sep-20 at 03:29There is a clone of pusher server available on laravel, have you checked it?
https://beyondco.de/docs/laravel-websockets/getting-started/introduction
- You can use this on LAN.
- This runs a php-socket server on some port like 5000
- Just use Laravel Echo or Pusher SDK for mobile apps and connect it to your server on 5000 port.
You don't have to pay anyone, it runs clone of pusher server on your server.
QUESTION
What is wrong with my docker-compose.yml
file ?
docker-compose complains:
ANSWER
Answered 2020-Sep-05 at 12:41You missed the colon on the previous line. Change image cassandra
to image: cassandra
.
QUESTION
I'm trying to get my frontend to watch for events whenever a certain table on my postgres db is altered.
The Postgres events fire perfectly and I'm able to relay them to through the Socker.io connection, but I'm having reliability issues. I'm getting (node:26) UnhandledPromiseRejectionWarning: Error: Client was closed and is not queryable
errors on my server and often events are not emitted and caught by Socket. I'm assume it has to do with the way I connect to Socket / db clients.
pg config:
...ANSWER
Answered 2020-Sep-03 at 22:00You are immediately release
ing the database client that you acquired, before any notifications can happen, and you're getting the error message every time the socket disconnects and you try to run the UNLISTEN
command on the released client whose connection was closed after 30s.
Instead, use
QUESTION
I am using Websocket.Client
which is a wrapper around ClientWebSocket
, within its internals I can see WebSocketReceiveResult
and it is using it to detect the message contents result.MessageType == WebSocketMessageType.Text
.
Is there any way to force a web socker to only to receive binary messages (not do any conversion to string?), or is the data format specified by the server?
...ANSWER
Answered 2020-Apr-26 at 12:09This feature was implemented by the author of Websocket.Client
within a few hours of posting on the github page... amazing!
QUESTION
There is a function in vuex file like below.
When I run start function using 'Button' of Vue component,
socket.emit sends the data to socker of nodejs.
And it receives some result through socket.on by websocket of nodejs.
ANSWER
Answered 2019-Dec-07 at 14:53socket.on
creates an eventListener
which fires every time the event is emitted. By including socket.on
in your start
action, you are creating a new eventListener
every time you call start
(by clicking the button), and each one of those listeners logs to the console. You shouldn't be creating a listener in the same block of emitting the event.
Create a new action like setupListeners
and call that only once from somewhere else, maybe in your component (such as in the created
lifecycle hook) or from some other action:
QUESTION
In my Python3 program that uses the Gmail API, I want to re-instantiate the Gmail "service" instance every few hours for the purpose of enhanced reliability. I am not certain if this is required to better reliability, but I thought it would be useful. So, when I start my program, I run the below function, which as you can see, builds the Gmail "service" instance. Then, after a few hours, I run the same code again. However, this results in socker.timeout errors. I know this because the socket.timeout errors occur every 6 hours in my log file, which is how often I re-initialize.
Why does this occur? Do I somehow need to disconnect my existing service, before reconnecting again? I did not find anything in the Gmail API Documentation or in other forum posts.
My other question is that do I even need to re-instantiate the service? Will the service instance be valid forever? (My program is intended to be continuous and run forever without touching it)
...ANSWER
Answered 2020-Mar-23 at 17:01socket.timeout
errors occur when the timeout window is exceeded when waiting on individual packets of a response.- In order to keep a connection open, you need to use a service account.
The socket timeout error occurs when the time before the receipt of an expected new packet is exceeded before a packet is actually received. As this occurs only for open/continuous connections, if you aren't making requests frequently enough to the Gmail API then it is likely that this is the origin of the error. I'm not sure how often this is, but given your refresh is every 6 hours I would expect this is longer than the token's lifetime.
The connection to the server that you establish will provide you an authorisation token, which has a limited lifespan before it needs to be renewed. The refresh token you receive however, could expire under certain circumstances, for example if you have multiple instances of the application running in parallel.
According to the documentation:
Access tokens periodically expire and become invalid credentials for a related API request. You can refresh an access token without prompting the user for permission (including when the user is not present) if you requested offline access to the scopes associated with the token.
and:
Requesting offline access is a requirement for any application that needs to access a Google API when the user is not present. For example, an app that performs backup services or executes actions at predetermined times needs to be able to refresh its access token when the user is not present
So in order to keep your refresh token valid, you need to set the access_type
keyword argument to offline
when calling the authorisation flow.
In python:
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