Android Question How to treat httpjob timeout?

[wimpie3]

I want to detect a timeout with httpjob.

I'm doing this:

Dim Job1 As HttpJob
Job1.Initialize(...)
Job1.Poststring(...)
Job1.GetRequest.Timeout =5000 ' 5 seconds
Wait For (j) JobDone(j As HttpJob)
If j.Success Then
Log("succes")
Else
Log("failed")
End If

When I start my app without internet connection, I thought the "failed" message would be shown after 5 seconds. But nothing happens. It seems that Android is trying to do the PostString and "hangs" on that line. What am I doing wrong?

 

[udg]

Your HttpJob is named Job1, not simply j
Correct the Wait For statement and it will work

 

[wimpie3]

Your HttpJob is named Job1, not simply j
Correct the Wait For statement and it will work

Sorry no, that was a typo, in reality I have"j" everywhere.

 

[josejad]

It's always a good idea to upload a small project to see the issue.
This example works

    Dim j As HttpJob
    j.Initialize("", Me)
    j.Download("https://www.google.com")
    j.GetRequest.Timeout =5000 ' 5 seconds
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        xui.MsgboxAsync(j.GetString, "OK")
    Else
        xui.MsgboxAsync("Error connecting", "ERROR")
    End If
    j.Release

 

[TILogistic]

I want to detect a timeout with httpjob.

I'm doing this:

Dim Job1 As HttpJob
Job1.Initialize(...)
Job1.Poststring(...)
Job1.GetRequest.Timeout =5000 ' 5 seconds
Wait For (j) JobDone(j As HttpJob)
If j.Success Then
Log("succes")
Else
Log("failed")
End If

When I start my app without internet connection, I thought the "failed" message would be shown after 5 seconds. But nothing happens. It seems that Android is trying to do the PostString and "hangs" on that line. What am I doing wrong?

use Try Catch and j.Response (know why the error)

not internet:

ResponseError. Reason: java.net.UnknownHostException: Host desconocido (xxxxxxxxxx), Response:

test:

    Dim j As HttpJob
    Try   
        j.Initialize("", Me)
        j.Download("https://www.google.com")
        j.GetRequest.Timeout = 5000 ' 5 seconds
        Wait For (j) JobDone(j As HttpJob)
        If j.Success Then
            xui.MsgboxAsync(j.GetString, "OK")
        Else
            xui.MsgboxAsync("Error connecting", j.Response.StatusCode) 'error code
        End If
    Catch
        Log(LastException) 'Error general
    End Try
    j.Release

 

[TILogistic]

ref.
j.Response.StatusCode

List of HTTP status codes - Wikipedia

en.wikipedia.org

 

[wimpie3]

When there is no internet, all I get is this message in the log window:
ResponseError. Reason: java.net.UnknownHostException: Unable to resolve host "www.test.com": No address associated with hostname, Response:

(and yes, the Response: is empty at the end of the line)

• The timeout parameter is ignored since it takes OVER 5000ms for the error to be displayed
• JobDone is never fired, so j.success cannot be checked
• The Try/Catch does not fire

 

[josejad]

JobDone is not used when you use a OkHttpUtils2 with Wait For. You must manage the events in the

        If j.Success Then
            xui.MsgboxAsync(j.GetString, "OK")
        Else
            xui.MsgboxAsync("Error connecting", j.Response.StatusCode) 'error code
        End If

Using Wait For we can wait for the JobDone event in the same sub that started the download.
No longer is it needed to have a single sub that handles all requests results.

Features Erel recommends to avoid

Sub JobDone -> Wait For (j) JobDone:
[B4X] OkHttpUtils2 with Wait For

 

[udg]

Hi,
as you may know, standard timeout is set to 30s. If you experience a never ending wait, could it be caused by a firewall/antivirus that block your outgoing message?

 

[TILogistic]

When there is no internet, all I get is this message in the log window:
ResponseError. Reason: java.net.UnknownHostException: Unable to resolve host "www.test.com": No address associated with hostname, Response:

(and yes, the Response: is empty at the end of the line)

• The timeout parameter is ignored since it takes OVER 5000ms for the error to be displayed
• JobDone is never fired, so j.success cannot be checked
• The Try/Catch does not fire

status OK:

status Error (not Internet)

upload an example to check it out.

 

[wimpie3]

status OK:
View attachment 121513

status Error (not Internet)
View attachment 121514

upload an example to check it out.

That is weird because I never get an error code back. I'll upload an example project.

 

[TILogistic]

Hi,
as you may know, standard timeout is set to 30s. If you experience a never ending wait, could it be caused by a firewall/antivirus that block your outgoing message?

the timeout may vary and depends on the request timeout setting on the web server.

one possible help is to check with ping:

 

[wimpie3]

the timeout may vary and depends on the request timeout setting on the web server.

No no, that can't be true. If we specify there should be a timeout for our httpjob, the timeout should fire when we reach OUR timeout, not the server timeout.

 

[TILogistic]

No no, that can't be true. If we specify there should be a timeout for our httpjob, the timeout should fire when we reach OUR timeout, not the server timeout.

what I am trying to say is that the wait time is not infinite, it can be handled by the client or the server.

 

[wimpie3]

PROBLEM SOLVED!

A timeout DOES indeed raise JobDone AND sets j.success to false, so there is no issue from the side of B4A! You don't need a try/catch either.

The issue was due to the emulator I'm using: Genymotion.

When the Genymotion emulator starts and there is a network available, and WHILE the emulator is running you cut the network, things go terribly wrong with its internal network driver.

In order to see the timeouts happening, you must start Genymotion with the network already down. In that case, everything works fine.

Thank you all for helping me.