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I have (for exercise) to create a server, to handle client connections. The subject talk about C programming, but I already did it. Id'like to do it again with node js. I don't need a http server, just a simple module which handle raw cmd. The protocol is given within the subject, and I will implement the logic of my app by my side. I am just new in node js programming, and its a light subject (about 5-6 commands). Do you know where I can start? Name/doc of a simple module, or just the minimalist code to handle client connection/command reading? (Cmds are simple strings, followed by \n).
I've searched inside npm website, but I just find http's server or something more elaborate, and I don't need so much feature. Just connections, commands in raw format and some events to handle nicely things like connection losts, read wich failed, etc...
I missed this documentation page: Net module
Thank you all!
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I am new to substrate and I am working on a project (in substrate) and as per the requirement I have to store the map key and value on a external database and to do so I chosen mongodb but I don't know how to implement it in runtime. or there are any other ways to use external code written in rust and use it inside the pallet...
The runtime should be considered a sandboxed environment and cannot easily talk to the outer client.
We do define a set of host functions which specifically describe the interface between the runtime and the client, but this is probably the wrong way to approach your problem.
Instead you probably want to run a second service which listens to your chain and forms the DB with the information you want.
Take a look at: https://github.com/paritytech/substrate-archive
And other such indexing solutions.
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I am looking for a message queue which can be used between nodejs and elixir. I know there are many queues support for nodejs but it is hard to find out one which provides API for both of these two languages. Does anyone know any implementation supports them? I want a open source solution for that.
RabbitMQ is a reasonable choice, it can be run locally (or in docker) and supports many languages http://www.rabbitmq.com/getstarted.html
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I enjoy using loopback to quickly build a REST api, with a fair amount of scaffolding. All I need to do is define my data, write any custom validations, and add any other server-side logic. For simple requirements, you can have a RESTful API in minutes. What about GraphQL?
Loopback doesn't support GraphQL. A quick websearch shows a few grapql servers like express-graphql. Is there a more batteries-included option? I don't want to write a web-server. I want a framework, but I can't find such.
I just want a functioning and stable data-abstraction layer, access control, a graphQL interface, and a solid way to connect all of these reliably. Is there a solution available already?
I would prefer a solution using either nodejs or python
It may help you to know that I have just discovered GraphQL. So maybe my question shows a fundamental misunderstanding of the topic, maybe I'm ignoring something obvious. If so, enlighten me.
Does Apollo server come closer to what you're looking for? https://github.com/apollostack/apollo-server/blob/master/README.md
express-graphql's main goal is to be a minimal reference implementation, whereas Apollo Server's goal is to be a complete production-ready GraphQL server.
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The node.js express module router callbacks receive a request and response object. Dumping the request object is gigantic, so it's pretty tough to interpret where the data I want to read is and how to interpret other properties of the object.
The router documentation doesn't mention anything about how to interpret the request object. Is there any documentation anywhere that is less obvious or a different spec that the object conforms to?
You probably want the API Request documentation. The API documentation is fairly thorough if you have any trouble with express.
What data are you looking for exactly? If, for instance, you need incoming form data, it'll be in the request body i.e. req.body or if you're looking for a header, it'll be in req.headers.
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HaskellNet seems to be the only available IMAP client library for Haskell, but it doesn't seem to support TLS connections, which is necessary for accessing Gmail's IMAP servers. Are there any alternative Haskell libraries or workarounds?
Sorry to dredge up quite an old post here, but I came across this thread when I had the same issue a while back, and have since written a library which adds SSL/TLS support to HaskellNet. It makes use of another library, connection, which I don't think existed at the time this question was originally posted, and which made adding TLS support significantly easier than it used to be. You can find it here: http://hackage.haskell.org/package/HaskellNet-SSL
Hopefully this will be of some use to anybody else who stumbles upon this thread looking for information about connecting to gmail accounts. In fact, for gmail specifically, there is sample code for connecting to their IMAP/SMTP servers in the repository.
Check out imapget on hackage. It gets around this limitation by creating a proxy port.
Looks like new library appeared since your last post: imap: An efficient IMAP client library, with SSL and streaming.