kandi X-RAY | uWebSockets Summary
kandi X-RAY | uWebSockets Summary
Simple, secure & standards compliant web server for the most demanding of applications
Top functions reviewed by kandi - BETA
uWebSockets Key Features
uWebSockets Examples and Code Snippets
Trending Discussions on uWebSockets
I have created a minimal app for testing deploying a node.js uWebsockets.js server on heroku with a dockerfile. Heroku logs shows that it fails with R10 (boot timeout) error, failed to bind to $PORT, although the logs before it show that it's listening at that port.
ANSWERAnswered 2022-Feb-03 at 14:31
I did quite a few changes but i think that it was a docker problem and changing my dockerfile to the below snippet made it work.
I want to defer the execution of a packaged task in a loop....
ANSWERAnswered 2021-Dec-29 at 13:52
By default a lambda's call operator is
Inside the lambda's body the
this pointer to the lambda is therefore also
const-qualified and so is the member
std::packaged_task does not have a
operator(), so it cannot be called.
You can make the lambda's
const-qualified by adding the
I'm trying to understand how exceptions are handled asynchronously -- I have a webserver that contains a lambda handler for processing requests (uWebsockets) and it keeps crashing. To simulate the scenario I used std::async...
ANSWERAnswered 2021-Nov-20 at 02:07
Let's take this step by step. Let's start with the very definition of what
std::async does. It:
runs the function f asynchronously (potentially in a separate thread
The word "potentially" is a distraction here, but the point is that a different execution thread is going to be involved here. For all practical reasons, the function getting
std::async-ed can, and on modern C++ implementations, it will run in a new execution thread.
The very reason for having different execution threads, in the first place, is that they are completely independent of their parent execution thread. Different execution threads must properly implement sequencing operations in order to mutually exchange information between themselves, in some form or fashion.
I am using uWebSockets to do a project. What I need to do is get the sender IP address out of incoming HTTP Requests. In the documentation I can see IP address can be taken out from the WebSockets. Do anybody have an idea to cast uWS to WebSockets to get the data or is there an other way to get it?...
ANSWERAnswered 2021-Oct-25 at 08:32
According to the documentation, the remote address is an attribute of the response. Ergo:
I am using a C++ web framework that heavily uses callback lambda functions. As you may guess, parameters to lambdas are usually specified as
auto due to the must to declare very long declarations.
Now I use
decltype() operator to find the right type deduced by
auto so that I can declare a vector of the same type. When the vector declaration happens inside the lambda, everything is fine.
Where my problem starts is this vector needs to be declared in an outer scope using lambdas
auto parameters' type information. Below is a simple example:
ANSWERAnswered 2021-Sep-27 at 13:52
You can "front-load" the type inference into a type alias.
I've coded a server in Node.js using uWebSockets.js and deployed it to Google Cloud App Engine.
The server itself works fine when I run it on the local network but when I try to connect it through the gcloud URL it throws the error (to the client):...
ANSWERAnswered 2021-May-04 at 10:20
I'm ussing uwebsockets to create ws server.
ANSWERAnswered 2021-Apr-29 at 08:30
It is because the compiler cannot convert 'brace-enclosed initializer list' to T&&. It can be solved by declaring the struct and converting it to Rvalue reference.
My project has linked uwebsockets. linked libs:...
ANSWERAnswered 2021-Apr-27 at 05:15
Is there any linking sequence problem? I see that
usockets links behind
libuv, maybe we can try swap the sequence: to link
You are using static linkage, and
usockets depends on
libuv, so swap the sequence will fix the problem.
I'm trying to use zlib in my project. The CMakeLists.txt is as follows:...
ANSWERAnswered 2021-Apr-25 at 13:49
The thing is, that you have to set the path to the library file as the
According to the documentation, if you want to link the library, each argument of
target_link_libraries can be:
- A library target name
- A full path to a library file (e.g.
- A plain library name (e.g.
In your case I suggest you to add the complete path to the library.
I don't have all the code of your project, so I suggest you consider this minimal example:
I'm trying to create an Android app that uses WebRTC data channels for data exchange. The data that I want to send is basic strings. Admittedly, this is my first time looking at WebRTC, and so I am a bit fuzzy on the details. My problem is that whenever I try to create a data channel, it is always null, and ICE candidate requests do not seem to be exchanged with the signalling server. I started from this example that creates a connection to exchange video between two devices and modified it to not exchange video but instead create a data channel.
I looked through a lot of other answers but the vast majority have to do with WebRTC in the browser, and data channel examples are rare to begin with. I also looked through the google chromium source code implementation of WebRTC in c++ to see if anything could be learned but had no luck.
My code is as follows
ANSWERAnswered 2020-Nov-17 at 23:53
Answering my own question, not entirely but will post what worked for me. Ultimately I could not figure out what was wrong with the code above, I suspect somewhere I was not doing something right with the initialization or requests.
Some of the files are from above and have not been modified, but I'll post them anyways. Also, I had used this article as a starting point.
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