I am making use of QuickFix/N
With an initiator/Client app does anyone know if there is a way to identify if the quickfix app is using Primary Host SocketConnectHost=xxx and SocketConnectPort=yyyy or Alternative/Backup/Secondary Host i.e. SocketConnectHost1=rrr and SocketConnectPort=zzz to connect to the server/acceptor.
Looking at the QuickFix Config tutorial i dont see anything that lets me find out.
http://quickfixn.org/tutorial/configuration.html
http://www.quickfixengine.org/quickfix/doc/html/configuration.html
There is no API for that, but the information is known inside QuickFIX/N. It does log it, here: https://github.com/connamara/quickfixn/blob/master/QuickFIXn/Transport/SocketInitiator.cs#L226
If you want to dig this information out, you can either modify QuickFIX/N to make some private things public (look for socketEndPoint), or implement a logger which captures the relevant phrase, or do some system-level introspection, i.e. use a system API to ask "What TCP connections do I have open now," like this: Get all TCP-connections opened by application using C#
Related
I am making a macos app in XCode, and I was wondering if there was a way to make it host a local server that is visible across the network.
I am trying to find a way so that it would host something on the devices's network with it's hostname/ip address, so if someone goes to http://hostname:5000 they would be able to see the response, and the app would be able to see the request, just like how hosting a local python server works. Is there any way to do this in XCode with Swift?
For example: the user presses 'start server' on their screen. The server is hosted across the network. Anytime a request is made to it, they get a notification.
Just to make you concern you may find some sample codes, including local web server inside the app.Few of them I found are:
https://github.com/ooper-shlab/MyWebViewApp-Swift
https://github.com/depoon/SwiftLocalhost
The main thing is it's just a public
, experimental code, so it's not simple, not easy to adopt, not all coding best-recommended, far from readable and may have severe bugs.But you can use it as a working example and take any parts of it into your app.
I run an self-hosted instance of BigBlueButton and signed up for Xirsys TURN server services because we need to serve clients behind (pretty restrictive) firewalls. Before I had been running my own instance of coturn, but as this led to problems recently, I thought I will got someone who does this for a living a try.
Now the configuration in BBB is explained here:
https://docs.bigbluebutton.org/2.2/setup-turn-server.html
Yet so far I completely failed to match the parameters I receive from Xirsys with what I have to put into the /usr/share/bbb-web/WEB-INF/classes/spring/turn-stun-servers.xml file in the place of the <turn.example.com> and <secret_value>.
Did anyone ever make this work? I did try and find a tutorial but also failed.
bbb_web, is returning this the turn uris. passwords to the html5 client, that the client is using in sip.js
so you can either get bbb-web to send valid username/passwords is same method is used, or modify the html5 client to make a Xirsys api call, to get access to the turn candidates.
Would need to look at api docs. twilio has a similar service.
regards,
Stephen
not the most elegant solution but the easiest one for me:
modify the final bbb js bundle to load the stunturn info from a fixed url in
e.g.
/usr/share/meteor/bundle/programs/web.browser/f30716b2b57e2862c4db2325 b7aac63f4622842b.js
the minified part should then look somewhat like:
const r=Meteor.settings.public.media,i='https://<yourbbburl>/html5client/stunturn.json',a=r.cacheStunTurnServers,s=r.fallbackStunServer;
and put either the static credentials or generated ones in a file stunturn.json besides the js bundle.
When started charles, java app cannot access redis got below error
redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: Read timed out
Then I tried to ignore the redis connection to solve it
but the problem still exists
So how to explicitly ignore some connection, e.g redis connection, mongo connection etc. ?
I'm sorry I don't really know what your real problem is. I guess the problem that you have is those HTTP requests still appearing in the Structure view, right?
Being that the case, I would strongly recommend you to use the Focus feature. To use it, you only need to add the domain you are working on to the View -> Focused Hosts... ( you can also do it by right clicking on the request and then selecting "Focus").
By doing this, all the non-focused domains will get grouped in a "Other hosts" entry in the Structure panel so they won't disturb your work anymore.
I'm writing a piece of software that will run on computers as well as phones.
The service uses an HTTP API for communication and will be published over the local network using Zeroconf.
Initially I published my service using _http._tcp. as the service type but I quickly discovered that both my NAS and my music receiver(!) also broadcasts themselves with that exact service type.
So the question now arises how to differentiate between my service and other services that are using HTTP.
Alternatives
Using a different service type
The is certainly the most certainly the easiest way and (almost) guarantees no other services will be picked up.
However, according to Apple1 new services should be registered with IANA. This is obviously not required but seeing as they recommend it it feels like it would be the wrong way to do it
Using the TXT record
Apple2 describes the TXT record like this:
When a service is registered, three related DNS records are created: a service (SRV) record, a pointer (PTR) record, and a text (TXT) record. The TXT record contains additional data needed to resolve or use the service, although it is also often empty.
The certainly feels like it could be the right way to do it, but I'm still not sure and it's hard to find a description of what the field should contain.
My first though would be to put something like <service_name>-<version> which will then be parsed to see which service it actually is.
My NAS seems to use this for identifying model and version numbers.
Try talking to the service
After finding a service one could always perform a HEAD request on a known endpoint and look for a known header set by the service.
This feels like a fairly slow approach and who knows what making a HEAD request to my receiver will do.
And just to be clear, this question has nothing to do with a specific language or framework, it's about the concepts of zeroconf.
I could show some code but I don't see how that would help.
First, does the service you're advertising actually meet the qualifications for _http as defined by RFC 2782. Specifically- is it not just using HTTP for a transport but is also:
can be displayed by "typical" web browser client software, and
is intended primarily to be viewed by a human user.
If no, register your own service type (there are a couple other services that use HTTP as a transport but don't meet those qualifications so they have -http as a suffix to the service name, see pgpkey-http, senteo-http, xul-http).
If yes, there are a couple ways to go depending on how strict one's interpretation of the RFC is. The least strict being just adding a TXT record as you've already noted in your question. iTunes registers itself with a TXT record in the format iTSh Version=196618.
If you're feeling a little more strict, the RFC only explicitly states that the u=, p= and path= TXT records exist for HTTP. Perhaps someone can chime in on this, but I haven't seen much discussion on whether adding TXT records to already existing entries is frowned upon or not. So with that, the other way is to just an algorithmic instance name. For example, adding the suffix "-NicklasAService" to the device name. Hopefully giving it a unique name to the local network but still making it so that the service can be easily picked out by the PTR record by just looking for the suffix.
So I have been modifying the chat program found here: http://www.dreamincode.net/forums/topic/259777-a-simple-chat-program-with-clientserver-gui-optional/ and I am at the point where I am ready to use it between twp pc's.
The problem is, I do not know enough about server-client relationships to set it up. Is there anything missing in the code for this to work? I just want to link two laptops to chat with one another. Is there any server softare I need to run or something?
I tried openfire but couldn't figure out how to link it, every port number I tried (listed in the admin page) didn't work. This is my first attempt at anything like this and probably beyond my current level of understanding which is why I would greatly appreciate a straightforward solution.
I chose this becaue I needed to do a lot of customization to the code so please use the ones on the page above as a reference. I would post the code here but there are 5 classes and they are neatly displayed on that page already with a explanation of each.
Thanks in advance!
Before you start trying to incorporate external libraries or functions, understand the code. Play around with it a little. See what does what and if you change this setting or that what will happen. Bare in mind that the code is separated into 2 applications:
Client - [ClientUI + Client + ChatMessage]
Server - [ServerUI + Server + ChatMessage]
Check that the application works on a single machine. So keep the server class the same and simply edit the client class so that it points to the current machine.
Run both the server and the client (from the example) on the same machine and when the client asks for the server location input 127.0.0.1 then put the port number you gave for the ServerSocket in Server. This should point to your machine and if this works but not when using 2 separate machines check your firewall settings.