I am having some issues with sockets in UWP.
I'm trying to test some simple socket communications (stripped down version of the MSDN example) between a mobile and a desktop on the same LAN subnet. I am developing in a VM (on a separate desktop) and can deploy to the VM and mobile. In that case connections work fine.
When I create an app package and install it on the desktop, I cannot connect.
I have windows firewall on the desktop completely off. The VM is set to have a separate IP on the network. I have checked all IPs I'm using are correct.
I am getting the typical: A connection attempt failed because the connected party did not properly respond after a period of time
This is driving me crazy, if anyone has any helpful advice that would be much appreciated!
edit: To clarify the above.
My app has both both client and server roles (can connect to a listener, and is also listening itself).
App (on Mobile) --> App (on VM, deployed from VS) - this works fine, Mobile can connect to VM no problem.
App (on Mobile) --> App (on Desktop, installed from appx) - Mobile unable to connect to Desktop. Firewall on desktop disabled. Task Manager shows .exe listening on the correct port.
Thanks, Inci
Found a solution to this - it appears connections over LAN need to have the Internet(Client & Server) capability selected.
I am most certainly connecting over my local network (specifically 192.168.0.15 (mobile) to .21 (desktop). It seems that when deploying with VS the app doesn't need the Internet capability.
If there is a more 'correct' solution I'll amend this.
Related
here's my problem, I have a Webservice that I run in tomcat using eclipse, and I have an android app connected to that Webservice. I access to that localhost using the local ip of my computer. Yes my phone is using same network. Sometimes when I launch the server, it's like I didnt, my app cant find a route and when I restart my computer everything works again. So my question is: What could be the problem because its kinda annoying to always have to restart my computer. I need a definitive solution. Thanks
For develop purpose only I'm testing a UWP (Universal Windows Platform) client app locally on my Windows 10 Laptop, where a WebAPI service is running.
By default, WinRT apps cannot connect to localhost but Visual Studio locally deployed apps should, but I coudn't manage to succeed.
Then I've used Fiddler to check and eventually enable loopback ability for my UWP app and found that it was already enabled.
By accident I've discovered that only while Fiddler is running, my UWP app can connect to the WebAPI service.
I'd like to know why.
Fiddler is able to Allow your App to use the local network loopback.
Simply check your App and you can reach your WebService.
You will see if you uncheck your App, you won't reach your WebService again.
Visual Studio enables the local network loopback while debugging as well if you check the option in your Projects Debugging Properties. (Project -> Properties -> Debugging -> Allow local network loopback)
I am trying to create a wifi direct p2p Group owner using wpa_supplicant and wpa_cli. Once the group is create with p2p_group_add, how can we connect legacy wifi devices to the GO? I see the GO in Android mobile search, however I am not able to detect/find GO in legacy laptop with just wifi support. May I know if any configurations need to be done for supporting legacy devices like security type etc. Please suggest.
An autonomous GO should be detected by any legacy wifi device - no special configuration is necessary. The GO should be beaconing and responding to any probe requests, both of which allow a legacy wifi system to detect it (it will just ignore the special P2P IE).
I just tried the same scenario and both my Android phone and my Windows 7 laptop could see the GO running on my Linux laptop.
As your Android phone can see the GO then it is obviously responding to probe requests, so the fact your Windows machine cannot see it is likely to be an issue with the specific netcard used (either in your wpa_supplicant machine, or your Windows machine).
Some further debugging may be necessary to find the root cause, for example using wireshark, and if possible either upgrading the wifi netcard driver on your Windows machine, or swapping it out with a different vendor.
I am developing an iPhone app that relies on a custom web service I created using Ruby on Rails. I want to setup a test server on my Mac without having to change the URLs that my app is pointing to - served by the RoR service. This way I can test new features or fixed bugs more easily using the test RoR server.
I have enabled internet sharing on my Mac so I can connect with my iphone to a private wifi network. I installed dnsmasq and edited my /etc/hosts file to resolve my web service URLs to the local gateway ip. However when I use my iphone app the URLs are resolved to the production server instead of my test server (my Mac).
How do I setup dnsmasq to point to the local ip.
Thanks!
Have you set the DNS server address on the iPhone to the IP address of your Mac?
After playing with it some more I was able to get it to work. I needed to edit /opt/local/etc/dnsmasq.conf and change the 'address' tag. I also had to change my Mac ethernet settings, under advance->dns I had to add 127.0.0.1 as the first dns server. This will automatically change resolv.conf which is not meant to be edited manually on a Mac.
After reading up a bit on the Dnsmasq solution, I found a nice step-by-step guide for Mac: http://davesouth.org/stories/how-to-set-up-dnsmasq-on-snow-leopard-for-local-wildcard-domains
(although personally I use Fiddler in a Windows VM for all of this sort of thing - ask if you'd like some details on that..)
super basic question - I am building an iphone app but will need to set up my computer as a server so my app can send data to my computer. what are the first steps that i need to take?
Thanks!
If you are writing an iPhone app you are probably on a Macbook so you can easily enable Apache in system preferences, click sharing, enable web sharing it will then show you your computers IP address that you can hit over a web browser.
That will set you up with a web server on your machine. Since your emulator and web server will be on the same wifi network and even if you deploy to the device you can have it on your wifi network you should be able to post data to your Mac's web server.
If you are passing data to it you'll need to read about 'web services', probably REST web services. I would then suggest reading about PHP and/or Ruby or Python as your programming language to interpret what you are posting to the web service.
Hope that helps you on your way.
If you are not on a Mac you can't develop an iPhone app anyways ;) so the above strategy should work for you.
3G will only work for you if your server is available outside of the network. Tons of info online on how to set that up but essentially what you would do is configure your router to forward incoming traffic from (for example) port 8080 to the ip address of your server. Assuming you are on a router.
As a side note, if down the line you use Ruby you could check out http://www.heroku.com/how if you want to host your server there