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What is the difference between socketio and OPC UA and when would I choose which protocol?
Are socketio and OPC UA the same type of protocol and alternatives of each other or do they fit into different catergories.
Are there any alternatives to these protocols?
Both are quite different even if they share some features.
To be basic, those 2 are used in different roles.
Socket.IO = real-time web communication
OPC UA = industrial automation communication
Yes there is quite a lot of alternatives to those 2 protocols:
MQTT (https://en.wikipedia.org/wiki/MQTT)
Web Socket (https://en.wikipedia.org/wiki/WebSocket)
XMPP / Jabber (https://en.wikipedia.org/wiki/XMPP)
AQMP (https://en.wikipedia.org/wiki/Advanced_Message_Queuing_Protocol)
...
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Closed 12 days ago.
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Using free tools, how can I modify/override a server response on the user-agent/client for any http method (e.g. POST/GET/DEL regardless of whether it is a fetch/XMLHttpRequest request)?
I have tried:
Requestly browser extension, but it only handles fetch API/XMLHttpRequest requests
HTTP Tookit but it does it on the fly only for paid PRO version
Fiddler Everywhere but it needs to be bought (a trial period is not enough)
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Closed 7 days ago.
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We are setting up an ikev2 client vpn using strongswan. So far we have managed to setup a single server using letsencrypt certificate with eap-radius authentication method. We are able to connect to our server without any issue. Now we want to auto-scale the vpn so that the server gets scaled up or down depending on the number of users connected to the server but how do we do it?
What would be the best approach to achieve this?
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I'm looking for any HTTP client library which makes asynchronous non-blocking IO for Java 8, i know that Java 11 has the new HTTP client which is able to do it, but i'm still using java 8. I have found the following http client so far: AsyncHttpClient, so i would to know if AsyncHttpClient really does asynchronous non-blocking IO?
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Closed 6 years ago.
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I have installed an Icecast server to simulate a radio station. Icecast use HTTP as a protocol but I wonder if, for audio only, it provides a good enough sound quality. I've heard about RTSP and it seems more convenient for audio streaming - but I can't find any Icecast equivalent using RTSP protocols.
Can I have your thoughts on it?
Thanks!
Audio quality depends on the codec and it's bit-rate. Transport is pretty much irrelevant.
The use of HTTP with protocols that support adaptive bitrates. This is theoretically a bad fit... however, HTTP is widely interoperable. It has countless implementations both on the server and client sides, which is great.
RTSP isnt known for its interoperability... Normal RTSP servers close inactive control connections. Well-behaving servers will still keep RTSP sessions for a while longer than HTTP...
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Closed 5 years ago.
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I'm making an app and when the user clicks dial, instead of dialing the end user, they will dial an intermediary number which will then dial the end user.
Twilio does this, bu is too costly at $0.03/min.
Are there other APIs that offer a cheaper solution?
You mention 'when the user clicks dial', so it sounds like it's web-based... Twilio just released Twilio Client - perhaps you can use that to accomplish this at 1/4 cent per minute.
Twilio Client: https://www.twilio.com/docs/api/client
Twilio Pricing: https://www.twilio.com/pricing
The only others I know of are CallFire # $0.035 / min, and Tropo # $0.003 /min. So, nothing cheaper than I'm aware of, no.