Re: TSNet error 6

[Bob Sneidar via use-livecode]

You know, I remember this happened to me a while back. There was a junior 
Pastor who liked to sit at this one coffee shop nearby to do his sermons. Old 
laptop no problem. New laptop, he couldn't even CONNECT to their wifi. He could 
everywhere else, just not this ONE coffee shop. 

Bob S


> On Sep 5, 2017, at 21:29 , Charles Warwick via use-livecode 
>  wrote:
> 
> Hi Jacque,
> 
> Any of those error codes (6, 7 or 35) are reasonable if you are operating in 
> an area with a really poor connection.
> 
> When you are operating on a public wifi, it could have a lot to do with how 
> the wifi is configured, as Bob mentioned below.  How these are configured can 
> vary greatly.
> 
> Depending on how far you want to go with testing, you could try see if your 
> app can communicate with other sites when at these coffee shops.  Does it 
> only have trouble with HTTPS sites, or just certain sites?  If you browse to 
> a site first with Chrome, does your app then work afterwards?  Does it have 
> trouble if you try connect via the IP address rather than the hostname?
> 
> Cheers,
> 
> Charles


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Re: TSNet error 6

[J. Landman Gay via use-livecode]

I'll have to find out the answers and do a little more testing. I didn't 
have any trouble at all today at a coffee shop near me but one of the 
testers has found a very reliable bad network so I can ask him to try the 
things you've mentioned.


We were joking today that we have good news - - everything fails really 
well now.


--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com



On September 5, 2017 11:32:22 PM Charles Warwick via use-livecode 
 wrote:



Hi Jacque,

Any of those error codes (6, 7 or 35) are reasonable if you are
operating in an area with a really poor connection.

When you are operating on a public wifi, it could have a lot to do with
how the wifi is configured, as Bob mentioned below.  How these are
configured can vary greatly.

Depending on how far you want to go with testing, you could try see if
your app can communicate with other sites when at these coffee shops. 
Does it only have trouble with HTTPS sites, or just certain sites?  If
you browse to a site first with Chrome, does your app then work
afterwards?  Does it have trouble if you try connect via the IP address
rather than the hostname?

Cheers,

Charles


On 6/09/2017 6:37 AM, J. Landman Gay via use-livecode wrote:

Okay, so three of us have been running around for a couple of days
trying to find "bad" internet connections. Sometimes we walk to the
limits of our router until we barely get a connection, and we get curl
error 35. At some coffee shops with a solid connection we get error 6,
once error 7. Sometimes Slack works, sometimes it doesn't. Sometimes
we don't have any problems at all on public wifi.

I think this is out of our control.

On 9/5/17 11:08 AM, Bob Sneidar via use-livecode wrote:

That is interesting. Coffe Shops/Public Wifi typically use a proxy
server and that may be what is restricting your DNS resolution. And
yeah it could definitely be a router issue as well. Sometimes I have
to reboot the router at work. No rhyme or reason, it just stops
passing traffic and I have to reset it. Wireless is black magic
voodoo anyways.

Bob S



On Sep 2, 2017, at 06:46 , Ralph DiMola via use-livecode
 wrote:

In today's episode, the user was in a coffee house using the free
wifi (it was one of my testers, there on purpose for testing). The
app could not resolve the host though the connection would have been
constant.
When he tests from his own home everything works, as it does for all
of us on the team.

We're wondering if https has anything to do with it. He could
connect to anything with Chrome but both my app and Slack would not
work using https. Could that be a factor?

We need to keep testing to see if https is really the cause, we're
not quite sure yet.



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Re: TSNet error 6

[Charles Warwick via use-livecode]

Hi Jacque,

Any of those error codes (6, 7 or 35) are reasonable if you are 
operating in an area with a really poor connection.


When you are operating on a public wifi, it could have a lot to do with 
how the wifi is configured, as Bob mentioned below.  How these are 
configured can vary greatly.


Depending on how far you want to go with testing, you could try see if 
your app can communicate with other sites when at these coffee shops.  
Does it only have trouble with HTTPS sites, or just certain sites?  If 
you browse to a site first with Chrome, does your app then work 
afterwards?  Does it have trouble if you try connect via the IP address 
rather than the hostname?


Cheers,

Charles


On 6/09/2017 6:37 AM, J. Landman Gay via use-livecode wrote:
Okay, so three of us have been running around for a couple of days 
trying to find "bad" internet connections. Sometimes we walk to the 
limits of our router until we barely get a connection, and we get curl 
error 35. At some coffee shops with a solid connection we get error 6, 
once error 7. Sometimes Slack works, sometimes it doesn't. Sometimes 
we don't have any problems at all on public wifi.


I think this is out of our control.

On 9/5/17 11:08 AM, Bob Sneidar via use-livecode wrote:
That is interesting. Coffe Shops/Public Wifi typically use a proxy 
server and that may be what is restricting your DNS resolution. And 
yeah it could definitely be a router issue as well. Sometimes I have 
to reboot the router at work. No rhyme or reason, it just stops 
passing traffic and I have to reset it. Wireless is black magic 
voodoo anyways.


Bob S


On Sep 2, 2017, at 06:46 , Ralph DiMola via use-livecode 
 wrote:


In today's episode, the user was in a coffee house using the free 
wifi (it was one of my testers, there on purpose for testing). The 
app could not resolve the host though the connection would have been 
constant.
When he tests from his own home everything works, as it does for all 
of us on the team.


We're wondering if https has anything to do with it. He could 
connect to anything with Chrome but both my app and Slack would not 
work using https. Could that be a factor?


We need to keep testing to see if https is really the cause, we're 
not quite sure yet.



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Re: TSNet error 6

[J. Landman Gay via use-livecode]

Okay, so three of us have been running around for a couple of days 
trying to find "bad" internet connections. Sometimes we walk to the 
limits of our router until we barely get a connection, and we get curl 
error 35. At some coffee shops with a solid connection we get error 6, 
once error 7. Sometimes Slack works, sometimes it doesn't. Sometimes we 
don't have any problems at all on public wifi.


I think this is out of our control.

On 9/5/17 11:08 AM, Bob Sneidar via use-livecode wrote:

That is interesting. Coffe Shops/Public Wifi typically use a proxy server and 
that may be what is restricting your DNS resolution. And yeah it could 
definitely be a router issue as well. Sometimes I have to reboot the router at 
work. No rhyme or reason, it just stops passing traffic and I have to reset it. 
Wireless is black magic voodoo anyways.

Bob S



On Sep 2, 2017, at 06:46 , Ralph DiMola via use-livecode 
 wrote:

In today's episode, the user was in a coffee house using the free wifi (it was 
one of my testers, there on purpose for testing). The app could not resolve the 
host though the connection would have been constant.
When he tests from his own home everything works, as it does for all of us on 
the team.

We're wondering if https has anything to do with it. He could connect to 
anything with Chrome but both my app and Slack would not work using https. 
Could that be a factor?

We need to keep testing to see if https is really the cause, we're not quite 
sure yet.



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Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[Bob Sneidar via use-livecode]

That is interesting. Coffe Shops/Public Wifi typically use a proxy server and 
that may be what is restricting your DNS resolution. And yeah it could 
definitely be a router issue as well. Sometimes I have to reboot the router at 
work. No rhyme or reason, it just stops passing traffic and I have to reset it. 
Wireless is black magic voodoo anyways. 

Bob S


> On Sep 2, 2017, at 06:46 , Ralph DiMola via use-livecode 
>  wrote:
> 
> In today's episode, the user was in a coffee house using the free wifi (it 
> was one of my testers, there on purpose for testing). The app could not 
> resolve the host though the connection would have been constant. 
> When he tests from his own home everything works, as it does for all of us on 
> the team.
> 
> We're wondering if https has anything to do with it. He could connect to 
> anything with Chrome but both my app and Slack would not work using https. 
> Could that be a factor?
> 
> We need to keep testing to see if https is really the cause, we're not quite 
> sure yet.


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Re: TSNet error 6

[Bob Sneidar via use-livecode]

If you are referring to the server using an IP address, then DNS is out of the 
equation, unless tsnet is internally trying to resolve a DNS name, which it 
might if signed SSL certificates are involved. If that is the case, then yes, 
it is out of your control, much like my Forms Generator app, when the local IT 
at a site has locked down outbound connections to SQL servers, or all DNS 
queries go through their content management system. 

In these cases, knowing the IP of the certificate server (like go daddy or 
network solutions) would not help as these are usually server farms and the IP 
address can change moment to moment. DNS is essential. It is possible (though 
definitely not prescribed) to create a hosts entry for one of the IP addresses 
of the cert authority, but there is no guarantee that server will be online in 
the future. 

Bob S


> On Sep 1, 2017, at 13:41 , J. Landman Gay via use-livecode 
>  wrote:
> 
> This is for an Android app that can be run from anywhere, so I don't have 
> control over the routers or servers. (And yeah, I didn't quite get everything 
> you were talking about, I'm a network novice.)
> 
> The apps run fine for most people and only get this error with a few users. I 
> think you're basically saying there's no cure, right?
> 
> If the web site has a static IP and the Android app uses that instead of a 
> domain name, will that fix it? The app is communicating with a database on 
> the web server.


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Re: TSNet error 6

[Bob Sneidar via use-livecode]

What does, "a server being monitored" mean? How do I monitor a server??

Bob S


> On Sep 2, 2017, at 13:44 , Jim Lambert via use-livecode 
>  wrote:
> 
> reachabilityChanged


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Re: TSNet error 6

[J. Landman Gay via use-livecode]

Two different Android phones so far, one is a Samsung S4 and the other 
is a non-Samsung, some type of HP phone I think.


Not much info, I know. Neither of the two phones with the error had it 
on the owner's home network. Both our app and the server use https. 
We're going to see what happens with plain http tomorrow.


Thanks so much for jumping in, I was hoping you would.

On 9/3/17 4:06 PM, Charles Warwick via use-livecode wrote:

That seems to be a Linux specific library issue from what I can tell

Are you having issues on just one Android device?

Regards,
 
Charles


On 4 Sep 2017 at 05:58:17 AEST, J. Landman Gay via use-livecode 
 wrote:
 
On 9/3/17 2:45 PM, J. Landman Gay via use-livecode wrote:

On 9/2/17 8:39 AM, Ralph DiMola wrote:

I would zero in on the https thing.
I found this on stackOverflow > 
: > > 
> ***

I found that CURL can decide to use IPv6, in which case it tries to > resolve but 
doesn't get an IPv6 answer (or something to that effect) and > times out.

You can try the command line switch -4 to test this out.
In PHP, you can configure this line by setting this:
curl_setopt($_h, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );

***

Several people in that thread report the problem started suddenly in > March of 
this year. Could this be related?
Charles W: does TSNet add an IPv4 option to https requests?




And more: 

A regression bug in Ubuntu in a March release which has been fixed, but not 
every server has been updated. I'm not sure there's much us peons can do about 
that, but hoping Charles knows.

-- Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[Charles Warwick via use-livecode]

That seems to be a Linux specific library issue from what I can tell

Are you having issues on just one Android device?

Regards,

Charles

On 4 Sep 2017 at 05:58:17 AEST, J. Landman Gay via use-livecode 
 wrote:

On 9/3/17 2:45 PM, J. Landman Gay via use-livecode wrote:
> On 9/2/17 8:39 AM, Ralph DiMola wrote:
>> I would zero in on the https thing.
> > I found this on stackOverflow > 
> > :
> >  > > > ***
> I found that CURL can decide to use IPv6, in which case it tries to > resolve 
> but doesn't get an IPv6 answer (or something to that effect) and > times out.
> > You can try the command line switch -4 to test this out.
> > In PHP, you can configure this line by setting this:
> > curl_setopt($_h, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
> ***
> > Several people in that thread report the problem started suddenly in > 
> > March of this year. Could this be related?
> > Charles W: does TSNet add an IPv4 option to https requests?
> 

And more: 

A regression bug in Ubuntu in a March release which has been fixed, but not 
every server has been updated. I'm not sure there's much us peons can do about 
that, but hoping Charles knows.

-- Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[J. Landman Gay via use-livecode]

On 9/3/17 2:45 PM, J. Landman Gay via use-livecode wrote:

On 9/2/17 8:39 AM, Ralph DiMola wrote:

I would zero in on the https thing.


I found this on stackOverflow 
: 



***
I found that CURL can decide to use IPv6, in which case it tries to 
resolve but doesn't get an IPv6 answer (or something to that effect) and 
times out.


You can try the command line switch -4 to test this out.

In PHP, you can configure this line by setting this:

curl_setopt($_h, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
***

Several people in that thread report the problem started suddenly in 
March of this year. Could this be related?


Charles W: does TSNet add an IPv4 option to https requests?




And more: 

A regression bug in Ubuntu in a March release which has been fixed, but 
not every server has been updated. I'm not sure there's much us peons 
can do about that, but hoping Charles knows.


--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[J. Landman Gay via use-livecode]

On 9/2/17 8:39 AM, Ralph DiMola wrote:

I would zero in on the https thing.


I found this on stackOverflow 
:


***
I found that CURL can decide to use IPv6, in which case it tries to 
resolve but doesn't get an IPv6 answer (or something to that effect) and 
times out.


You can try the command line switch -4 to test this out.

In PHP, you can configure this line by setting this:

curl_setopt($_h, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
***

Several people in that thread report the problem started suddenly in 
March of this year. Could this be related?


Charles W: does TSNet add an IPv4 option to https requests?

--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[J. Landman Gay via use-livecode]

It happens to other users in other places, but only occasionally -- 
though we haven't got a whole lot of users yet, mostly just the client 
and some testers. The reason we started looking into this is because the 
client was giving a demo and it totally failed (ouch. He was trying to 
sell it.) So we started trying to reproduce the problem. None of us had 
any trouble on our home networks. One of us went to a coffee shop and 
could reproduce it there. The client had the problem at the location of 
his demo, went home and still had the problem, then suddenly at home it 
started working again. Up until that day he'd had no issues on his home 
network (I wonder if it was storing the DNS from the demo site. Is that 
a thing?)


It is always the same error and is unpredictable. We're sending the 
tester back to the coffee shop on Monday so we can experiment with 
turning off https.


On 9/2/17 8:39 AM, Ralph DiMola wrote:

I would zero in on the https thing. If the user can get to an https web-site 
via Safari/Chrome on the same server as your DB then tsNet should work unless 
there is a bug in tsNet. The slack also problem has me concerned with the 
router. If we eliminate the tin-foil-hat possibilities then could there be a 
router issue in the coffee shop? Does this happen with other users in other 
places? I've seen routers do some strange things until a re-boot. The age of 
the router(or a pending firmware update) could also be in play. It's just so 
hard when you have no/zero/nada control over network connectivity.



--
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HyperActive Software   | http://www.hyperactivesw.com

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RE: TSNet error 6

[Jim Lambert via use-livecode]

RalphM wrote:
> The first thing I do before any network access is to ping my server with a
> https request to a LC backend server script that returns "OK". I set the
> timeout for 2 seconds. If the returned data is not "OK" or take more than 2
> seconds then I put the app into off-line mode.


On IOS this is a bit easier.

See 

reachabilityChanged
iphoneReachabilityTarget
iphoneSetReachabilityTarget

 in LC’s dictionary.

"The network connection on iOS devices is generally more transient than normal 
network connections and can change between wireless and wide-area wireless 
(GPRS, 3G, EDGE etc.) transport as it moves, and indeed be lost entirely. As 
the behavior of an application may vary depending on what kind of network 
connection is present it is useful to be able to monitor a given server for the 
type of connection the device currently has to it."

Jim Lambert
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RE: TSNet error 6

[Ralph DiMola via use-livecode]

Another Gotch ya... If you connect to a MySql DB (although https to back-end 
server is preferred) every time you do a query of some sort first do something 
simple like "SELECT 'I am Here'" or list the tables and see if you get back a 
number for the record set or a list of tables. If not then close the 
connection(found this keeps things from going sideways) and then re-connect to 
the MySql server.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net


-Original Message-
From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On Behalf Of 
Sannyasin Brahmanathaswami via use-livecode
Sent: Saturday, September 02, 2017 12:22 AM
To: How to use LiveCode
Cc: Sannyasin Brahmanathaswami
Subject: Re: TSNet error 6

Ralph

I'm just about to implement this in our new app.

I was only checking  on init and some other navigation points in the app, but 
it's clear now we have to check *everytime* we call the server. because, as you 
say, use can walk from his desk (wifi) to outside (drop to bad 3G) and then out 
into the open (suddenly gets 3 bars LTE) and the to the café (back up with 5 
bar wifi)

all in a 10 minute walk!

how do you "see if…( it is)  fast enough"

is the assumption  that if you get something in under 2000 milliseconds than 
things should work OK, or are you tracking some packet stream?

Also why not just put a text file on the server 

https://www.mydomain.com/ping.text

with the word "true"

Apple does this this… but their little static page just has the word "success" 
returned.

does your script give some advantage?

Brahmanathswami

 

On 9/1/17, 11:10 AM, "use-livecode on behalf of Ralph DiMola via use-livecode" 
<use-livecode-boun...@lists.runrev.com on behalf of 
use-livecode@lists.runrev.com> wrote:

The first thing I do before any network access is to ping my server with a
https request to a LC backend server script that returns "OK". I set the
timeout for 2 seconds. If the returned data is not "OK" or take more than 2
seconds then I put the app into off-line mode. I try to ping the server
every time the users does "x" or the user's action again need network access
and see if the network is back online or fast enough.

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RE: TSNet error 6

[Ralph DiMola via use-livecode]

B,

Yes I assume that if I get a response in 2000 ms the link is fast enough. The 
text file should work but seeing I need the backend server for app 
functionality this test also makes sure that there is good connectivity and the 
web server/LC server is functioning in one test.

In one of my apps the user can save notes about each location retrieved from a 
static local DB. These notes a saved in a second local DB and also uploaded to 
the server for backup. So... I need to keep "last update" dates on both the 
device and the server and resolve this with every transaction and also on app 
startup just in case the user lost connectivity and saved a note locally to the 
device. I try to deal with all combination but I'm sure there some obscure race 
conditions that I am not handling, but it's not moving money, air traffic 
control or launching the space shuttle.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net

-Original Message-
From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On Behalf Of 
Sannyasin Brahmanathaswami via use-livecode
Sent: Saturday, September 02, 2017 12:22 AM
To: How to use LiveCode
Cc: Sannyasin Brahmanathaswami
Subject: Re: TSNet error 6

Ralph

I'm just about to implement this in our new app.

I was only checking  on init and some other navigation points in the app, but 
it's clear now we have to check *everytime* we call the server. because, as you 
say, use can walk from his desk (wifi) to outside (drop to bad 3G) and then out 
into the open (suddenly gets 3 bars LTE) and the to the café (back up with 5 
bar wifi)

all in a 10 minute walk!

how do you "see if…( it is)  fast enough"

is the assumption  that if you get something in under 2000 milliseconds than 
things should work OK, or are you tracking some packet stream?

Also why not just put a text file on the server 

https://www.mydomain.com/ping.text

with the word "true"

Apple does this this… but their little static page just has the word "success" 
returned.

does your script give some advantage?

Brahmanathswami

 

On 9/1/17, 11:10 AM, "use-livecode on behalf of Ralph DiMola via use-livecode" 
<use-livecode-boun...@lists.runrev.com on behalf of 
use-livecode@lists.runrev.com> wrote:

The first thing I do before any network access is to ping my server with a
https request to a LC backend server script that returns "OK". I set the
timeout for 2 seconds. If the returned data is not "OK" or take more than 2
seconds then I put the app into off-line mode. I try to ping the server
every time the users does "x" or the user's action again need network access
and see if the network is back online or fast enough.

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RE: TSNet error 6

[Ralph DiMola via use-livecode]

One other note. My banking app(RBS) on my phone sometimes(rarely) does not work 
even when I have connectivity while on the road. It honks that it can't get a 
secure connection. Then I move to another cell tower(I presume) and it works. 
Secure mobile communication requires a ton of app error checking and might not 
function in all circumstances.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net


-Original Message-
From: J. Landman Gay [mailto:jlandman...@gmail.com] On Behalf Of J. Landman Gay
Sent: Friday, September 01, 2017 11:21 PM
To: rdim...@evergreeninfo.net
Subject: Re: TSNet error 6

In today's episode, the user was in a coffee house using the free wifi (it was 
one of my testers, there on purpose for testing). The app could not resolve the 
host though the connection would have been constant. 
When he tests from his own home everything works, as it does for all of us on 
the team.

We're wondering if https has anything to do with it. He could connect to 
anything with Chrome but both my app and Slack would not work using https. 
Could that be a factor?

We need to keep testing to see if https is really the cause, we're not quite 
sure yet.

On 9/1/17 4:10 PM, Ralph DiMola wrote:
> J,
> 
> I have run into many network issues on mobile. The chance that the 
> user might have a weak cell/wifi signal, move from cellular==>wifi or 
> wifi==>cellular is higher than one would think. This would be my first 
> guess. I always ask the user if Safari/Chrome is serving up pages. 99% 
> of the time network funnies are caused by weak/changing network 
> access. The amount of error checking and combinations thereof has been very 
> challenging.
> The first thing I do before any network access is to ping my server 
> with a https request to a LC backend server script that returns "OK". 
> I set the timeout for 2 seconds. If the returned data is not "OK" or 
> take more than 2 seconds then I put the app into off-line mode. I try 
> to ping the server every time the users does "x" or the user's action 
> again need network access and see if the network is back online or fast 
> enough.
> 
> Ralph DiMola
> IT Director
> Evergreen Information Services
> rdim...@evergreeninfo.net
> 
> -Original Message-
> From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On 
> Behalf Of J. Landman Gay via use-livecode
> Sent: Friday, September 01, 2017 4:42 PM
> To: Bob Sneidar via use-livecode
> Cc: J. Landman Gay
> Subject: Re: TSNet error 6
> 
> This is for an Android app that can be run from anywhere, so I don't 
> have control over the routers or servers. (And yeah, I didn't quite 
> get everything you were talking about, I'm a network novice.)
> 
> The apps run fine for most people and only get this error with a few users.
> I think you're basically saying there's no cure, right?
> 
> If the web site has a static IP and the Android app uses that instead 
> of a domain name, will that fix it? The app is communicating with a 
> database on the web server.
> 
> 
> On 9/1/17 12:12 PM, Bob Sneidar via use-livecode wrote:
>> That is a DNS error. If referring to a host, you can use the NetBIOS 
>> name
> locally, the FQDN locally or remotely, or the IP number (which might 
> change so that is always a bad idea).
>>
>> Now if the host name is NetBIOS, a number of things can go wrong in a
> non-domain environment. With a domain server acting as your local DNS, 
> it will resolve NetBIOS names to their FQDN equivalents via the WINS service.
> Barring that, NetBIOS name resolution falls back on an election 
> process, where some windows computer is elected as the Master Browser, 
> which is then responsible for tracing all devices on the network and 
> their current IP addresses.
>>
>> If it happens to be a regular workstation, and it is set to go to 
>> sleep
> after a certain amount of time, well another device has to become the 
> master browser, and it won't know about the  server in question until 
> it requests the current master browser and it might not do that for 
> some time. See the problem?
>>
>> So there are a couple ways around that. First you can configure the 
>> local
> router with a static DNS entry, and make sure the primary DNS server 
> listed is that router. Alternately you can edit the hosts file on each 
> workstatino and make a static entry there. The latter is probably 
> going to be the most reliable, but starting with windows 7 I think 
> that file is locked, so it requires elevated privileges.
>>
>> Sucks huh? The best thing is to have a real DNS server locally (every
> router these days does this but not everyone configures their routers
> corr

RE: TSNet error 6

[Ralph DiMola via use-livecode]

I would zero in on the https thing. If the user can get to an https web-site 
via Safari/Chrome on the same server as your DB then tsNet should work unless 
there is a bug in tsNet. The slack also problem has me concerned with the 
router. If we eliminate the tin-foil-hat possibilities then could there be a 
router issue in the coffee shop? Does this happen with other users in other 
places? I've seen routers do some strange things until a re-boot. The age of 
the router(or a pending firmware update) could also be in play. It's just so 
hard when you have no/zero/nada control over network connectivity.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net


-Original Message-
From: J. Landman Gay [mailto:jlandman...@gmail.com] On Behalf Of J. Landman Gay
Sent: Friday, September 01, 2017 11:21 PM
To: rdim...@evergreeninfo.net
Subject: Re: TSNet error 6

In today's episode, the user was in a coffee house using the free wifi (it was 
one of my testers, there on purpose for testing). The app could not resolve the 
host though the connection would have been constant. 
When he tests from his own home everything works, as it does for all of us on 
the team.

We're wondering if https has anything to do with it. He could connect to 
anything with Chrome but both my app and Slack would not work using https. 
Could that be a factor?

We need to keep testing to see if https is really the cause, we're not quite 
sure yet.

On 9/1/17 4:10 PM, Ralph DiMola wrote:
> J,
> 
> I have run into many network issues on mobile. The chance that the 
> user might have a weak cell/wifi signal, move from cellular==>wifi or 
> wifi==>cellular is higher than one would think. This would be my first 
> guess. I always ask the user if Safari/Chrome is serving up pages. 99% 
> of the time network funnies are caused by weak/changing network 
> access. The amount of error checking and combinations thereof has been very 
> challenging.
> The first thing I do before any network access is to ping my server 
> with a https request to a LC backend server script that returns "OK". 
> I set the timeout for 2 seconds. If the returned data is not "OK" or 
> take more than 2 seconds then I put the app into off-line mode. I try 
> to ping the server every time the users does "x" or the user's action 
> again need network access and see if the network is back online or fast 
> enough.
> 
> Ralph DiMola
> IT Director
> Evergreen Information Services
> rdim...@evergreeninfo.net
> 
> -Original Message-
> From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On 
> Behalf Of J. Landman Gay via use-livecode
> Sent: Friday, September 01, 2017 4:42 PM
> To: Bob Sneidar via use-livecode
> Cc: J. Landman Gay
> Subject: Re: TSNet error 6
> 
> This is for an Android app that can be run from anywhere, so I don't 
> have control over the routers or servers. (And yeah, I didn't quite 
> get everything you were talking about, I'm a network novice.)
> 
> The apps run fine for most people and only get this error with a few users.
> I think you're basically saying there's no cure, right?
> 
> If the web site has a static IP and the Android app uses that instead 
> of a domain name, will that fix it? The app is communicating with a 
> database on the web server.
> 
> 
> On 9/1/17 12:12 PM, Bob Sneidar via use-livecode wrote:
>> That is a DNS error. If referring to a host, you can use the NetBIOS 
>> name
> locally, the FQDN locally or remotely, or the IP number (which might 
> change so that is always a bad idea).
>>
>> Now if the host name is NetBIOS, a number of things can go wrong in a
> non-domain environment. With a domain server acting as your local DNS, 
> it will resolve NetBIOS names to their FQDN equivalents via the WINS service.
> Barring that, NetBIOS name resolution falls back on an election 
> process, where some windows computer is elected as the Master Browser, 
> which is then responsible for tracing all devices on the network and 
> their current IP addresses.
>>
>> If it happens to be a regular workstation, and it is set to go to 
>> sleep
> after a certain amount of time, well another device has to become the 
> master browser, and it won't know about the  server in question until 
> it requests the current master browser and it might not do that for 
> some time. See the problem?
>>
>> So there are a couple ways around that. First you can configure the 
>> local
> router with a static DNS entry, and make sure the primary DNS server 
> listed is that router. Alternately you can edit the hosts file on each 
> workstatino and make a static entry there. The latter is probably 
> going to be the most reliable, but starting with

Re: TSNet error 6

[Sannyasin Brahmanathaswami via use-livecode]

Ralph

I'm just about to implement this in our new app.

I was only checking  on init and some other navigation points in the app, but 
it's clear now we have to check *everytime* we call the server. because, as you 
say, use can walk from his desk (wifi) to outside (drop to bad 3G) and then out 
into the open (suddenly gets 3 bars LTE) and the to the café (back up with 5 
bar wifi)

all in a 10 minute walk!

how do you "see if…( it is)  fast enough"

is the assumption  that if you get something in under 2000 milliseconds than 
things should work OK, or are you tracking some packet stream?

Also why not just put a text file on the server 

https://www.mydomain.com/ping.text

with the word "true"

Apple does this this… but their little static page just has the word "success" 
returned.

does your script give some advantage?

Brahmanathswami

 

On 9/1/17, 11:10 AM, "use-livecode on behalf of Ralph DiMola via use-livecode" 
 wrote:

The first thing I do before any network access is to ping my server with a
https request to a LC backend server script that returns "OK". I set the
timeout for 2 seconds. If the returned data is not "OK" or take more than 2
seconds then I put the app into off-line mode. I try to ping the server
every time the users does "x" or the user's action again need network access
and see if the network is back online or fast enough.

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Re: TSNet error 6

[J. Landman Gay via use-livecode]

On 9/1/17 6:18 PM, Alex Tweedly via use-livecode wrote:



On 01/09/2017 21:41, J. Landman Gay via use-livecode wrote:


If the web site has a static IP and the Android app uses that instead 
of a domain name, will that fix it? The app is communicating with a 
database on the web server.



I think the answer is "it will stop you getting a tsnet error (6)".
That doesn't mean it will "fix" it. Most likely (as others have said in 
more detail), it's a result of flaky or intermittent network connection 
somewhere, making your DNS lookups fail incompletely. Using a static IP 
will simply mean that no DNS lookup is needed - so your attempt to 
transfer data will get started and likely fail in some other way because 
of that flaky connection.


How (whether) that shows itself to the user is unpredictable :-)


That's a problem, the app needs to be dead reliable. But see my other 
note about https connections. Those appear to have something to do with 
the problem, but my tester won't get back to the coffee house for a 
couple of days to find out for sure.


--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[Alex Tweedly via use-livecode]

On 01/09/2017 21:41, J. Landman Gay via use-livecode wrote:


If the web site has a static IP and the Android app uses that instead 
of a domain name, will that fix it? The app is communicating with a 
database on the web server.



I think the answer is "it will stop you getting a tsnet error (6)".
That doesn't mean it will "fix" it. Most likely (as others have said in 
more detail), it's a result of flaky or intermittent network connection 
somewhere, making your DNS lookups fail incompletely. Using a static IP 
will simply mean that no DNS lookup is needed - so your attempt to 
transfer data will get started and likely fail in some other way because 
of that flaky connection.


How (whether) that shows itself to the user is unpredictable :-)

Alex.



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RE: TSNet error 6

[Ralph DiMola via use-livecode]

J,

I have run into many network issues on mobile. The chance that the user
might have a weak cell/wifi signal, move from cellular==>wifi or
wifi==>cellular is higher than one would think. This would be my first
guess. I always ask the user if Safari/Chrome is serving up pages. 99% of
the time network funnies are caused by weak/changing network access. The
amount of error checking and combinations thereof has been very challenging.
The first thing I do before any network access is to ping my server with a
https request to a LC backend server script that returns "OK". I set the
timeout for 2 seconds. If the returned data is not "OK" or take more than 2
seconds then I put the app into off-line mode. I try to ping the server
every time the users does "x" or the user's action again need network access
and see if the network is back online or fast enough.

Ralph DiMola
IT Director
Evergreen Information Services
rdim...@evergreeninfo.net

-Original Message-
From: use-livecode [mailto:use-livecode-boun...@lists.runrev.com] On Behalf
Of J. Landman Gay via use-livecode
Sent: Friday, September 01, 2017 4:42 PM
To: Bob Sneidar via use-livecode
Cc: J. Landman Gay
Subject: Re: TSNet error 6

This is for an Android app that can be run from anywhere, so I don't have
control over the routers or servers. (And yeah, I didn't quite get
everything you were talking about, I'm a network novice.)

The apps run fine for most people and only get this error with a few users.
I think you're basically saying there's no cure, right?

If the web site has a static IP and the Android app uses that instead of a
domain name, will that fix it? The app is communicating with a database on
the web server.


On 9/1/17 12:12 PM, Bob Sneidar via use-livecode wrote:
> That is a DNS error. If referring to a host, you can use the NetBIOS name
locally, the FQDN locally or remotely, or the IP number (which might change
so that is always a bad idea).
> 
> Now if the host name is NetBIOS, a number of things can go wrong in a
non-domain environment. With a domain server acting as your local DNS, it
will resolve NetBIOS names to their FQDN equivalents via the WINS service.
Barring that, NetBIOS name resolution falls back on an election process,
where some windows computer is elected as the Master Browser, which is then
responsible for tracing all devices on the network and their current IP
addresses.
> 
> If it happens to be a regular workstation, and it is set to go to sleep
after a certain amount of time, well another device has to become the master
browser, and it won't know about the  server in question until it requests
the current master browser and it might not do that for some time. See the
problem?
> 
> So there are a couple ways around that. First you can configure the local
router with a static DNS entry, and make sure the primary DNS server listed
is that router. Alternately you can edit the hosts file on each workstatino
and make a static entry there. The latter is probably going to be the most
reliable, but starting with windows 7 I think that file is locked, so it
requires elevated privileges.
> 
> Sucks huh? The best thing is to have a real DNS server locally (every
router these days does this but not everyone configures their routers
correctly) and then via the command line you *should* be able to register
with the DNS server, but I'm not sure how.
> 
> Hope that is not too much.
> 
> Bob S
> 
> 
>> On Sep 1, 2017, at 09:40 , J. Landman Gay via use-livecode
<use-livecode@lists.runrev.com> wrote:
>>
>> I have two apps that normally work fine but in both an occasional user
will get an error "TSNeterr : (6) could not resolve host". What would be the
cause of this sporadic problem? We're not sure what to tell these users.
>>
>> --
>> Jacqueline Landman Gay | jac...@hyperactivesw.com
>> HyperActive Software   | http://www.hyperactivesw.com
> 
> 
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> use-livecode mailing list
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subscription preferences:
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> 


-- 
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[J. Landman Gay via use-livecode]

This is for an Android app that can be run from anywhere, so I don't 
have control over the routers or servers. (And yeah, I didn't quite get 
everything you were talking about, I'm a network novice.)


The apps run fine for most people and only get this error with a few 
users. I think you're basically saying there's no cure, right?


If the web site has a static IP and the Android app uses that instead of 
a domain name, will that fix it? The app is communicating with a 
database on the web server.



On 9/1/17 12:12 PM, Bob Sneidar via use-livecode wrote:

That is a DNS error. If referring to a host, you can use the NetBIOS name 
locally, the FQDN locally or remotely, or the IP number (which might change so 
that is always a bad idea).

Now if the host name is NetBIOS, a number of things can go wrong in a 
non-domain environment. With a domain server acting as your local DNS, it will 
resolve NetBIOS names to their FQDN equivalents via the WINS service. Barring 
that, NetBIOS name resolution falls back on an election process, where some 
windows computer is elected as the Master Browser, which is then responsible 
for tracing all devices on the network and their current IP addresses.

If it happens to be a regular workstation, and it is set to go to sleep after a 
certain amount of time, well another device has to become the master browser, 
and it won't know about the  server in question until it requests the current 
master browser and it might not do that for some time. See the problem?

So there are a couple ways around that. First you can configure the local 
router with a static DNS entry, and make sure the primary DNS server listed is 
that router. Alternately you can edit the hosts file on each workstatino and 
make a static entry there. The latter is probably going to be the most 
reliable, but starting with windows 7 I think that file is locked, so it 
requires elevated privileges.

Sucks huh? The best thing is to have a real DNS server locally (every router 
these days does this but not everyone configures their routers correctly) and 
then via the command line you *should* be able to register with the DNS server, 
but I'm not sure how.

Hope that is not too much.

Bob S



On Sep 1, 2017, at 09:40 , J. Landman Gay via use-livecode 
 wrote:

I have two apps that normally work fine but in both an occasional user will get an error 
"TSNeterr : (6) could not resolve host". What would be the cause of this 
sporadic problem? We're not sure what to tell these users.

--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com



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--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com

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Re: TSNet error 6

[Trevor DeVore via use-livecode]

On Fri, Sep 1, 2017 at 11:40 AM, J. Landman Gay via use-livecode <
use-livecode@lists.runrev.com> wrote:

> I have two apps that normally work fine but in both an occasional user
> will get an error "TSNeterr : (6) could not resolve host". What would be
> the cause of this sporadic problem? We're not sure what to tell these users.
>

tsNet is reporting the curl error. You should be able to google something
like “curl error (6) could not resolve host” and find some potential
answers.

-- 
Trevor DeVore
ScreenSteps
www.screensteps.com
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Re: TSNet error 6

[Bob Sneidar via use-livecode]

That is a DNS error. If referring to a host, you can use the NetBIOS name 
locally, the FQDN locally or remotely, or the IP number (which might change so 
that is always a bad idea). 

Now if the host name is NetBIOS, a number of things can go wrong in a 
non-domain environment. With a domain server acting as your local DNS, it will 
resolve NetBIOS names to their FQDN equivalents via the WINS service. Barring 
that, NetBIOS name resolution falls back on an election process, where some 
windows computer is elected as the Master Browser, which is then responsible 
for tracing all devices on the network and their current IP addresses. 

If it happens to be a regular workstation, and it is set to go to sleep after a 
certain amount of time, well another device has to become the master browser, 
and it won't know about the  server in question until it requests the current 
master browser and it might not do that for some time. See the problem? 

So there are a couple ways around that. First you can configure the local 
router with a static DNS entry, and make sure the primary DNS server listed is 
that router. Alternately you can edit the hosts file on each workstatino and 
make a static entry there. The latter is probably going to be the most 
reliable, but starting with windows 7 I think that file is locked, so it 
requires elevated privileges. 

Sucks huh? The best thing is to have a real DNS server locally (every router 
these days does this but not everyone configures their routers correctly) and 
then via the command line you *should* be able to register with the DNS server, 
but I'm not sure how. 

Hope that is not too much. 

Bob S


> On Sep 1, 2017, at 09:40 , J. Landman Gay via use-livecode 
>  wrote:
> 
> I have two apps that normally work fine but in both an occasional user will 
> get an error "TSNeterr : (6) could not resolve host". What would be the cause 
> of this sporadic problem? We're not sure what to tell these users.
> 
> --
> Jacqueline Landman Gay | jac...@hyperactivesw.com
> HyperActive Software   | http://www.hyperactivesw.com


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TSNet error 6

[J. Landman Gay via use-livecode]

I have two apps that normally work fine but in both an occasional user will 
get an error "TSNeterr : (6) could not resolve host". What would be the 
cause of this sporadic problem? We're not sure what to tell these users.


--
Jacqueline Landman Gay | jac...@hyperactivesw.com
HyperActive Software   | http://www.hyperactivesw.com



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