Android Question httpjob needs 100 sec for first result

O

olivere

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Hello,

I encounter a strange problem: httpjob (okHttpUtils2 lib) takes nearly 100 secs to complete the first task. All subsequent requests are performed in normal time( 0.5-2 seconds). Tested on several phones with Android 14 (Samsung A25, Samsung Galaxy A04)

Some time before, a similar problem has already been reported (see link above), but the solution there provided by Erel does not help in this current case:
https://www.b4x.com/android/forum/t...-at-a-random-time-depending-on-devices.149846

Attached, I modified the sample project from the above thread.
ProblemHTTP: 
Private Sub Button1_Click
  
Dim fTicksIni As Long = DateTime.Now
    Dim fTicksEnd As Long
    Dim fTicksEnd As Long
    Dim j As HttpJob
    j.Initialize("", Me)
    j.Download("https://www.b4x.com")
    Log("Starting Download")
    Label1.Text = "Waiting..."
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        Label1.Text = j.GetString
        fTicksEnd= DateTime.Now
        Log( "Completed after "&NumberFormat((((((fTicksEnd-fTicksIni)/DateTime.TicksPerSecond)))),1,4) &" seconds"  )
    End If
    j.Release
    End Sub

Here is the log file:
Log: 
Logger connected to:  samsung SM-A256B
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
StartHttpUtils2Service
*** Receiver (httputils2service) Receive (first time) ***
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
Starting Download
Completed after 90.84 seconds
** Activity (main) Pause event (activity is not paused). **
*** mainpage: B4XPage_Disappear [mainpage]

With such a behaviour, the lib is hardly usable anymore.
It would be great if anybody could point me to the right direction if I'm doing something wrong and/or have a fast solution for this problem,.
tx
Oliver

Edit: Same behavour also with BETA 13!
 

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  • ProblemHTTP.zip
    12.1 KB · Views: 46
Last edited:
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zed

zed

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Licensed User
No problems compiling

Log result
Log: 
Logger connecté à :  Xiaomi M2101K7AG
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
*** Receiver (httputils2service) Receive (first time) ***
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Message longer than Log limit (4000). Message was truncated.
0.946 s  (Count: 0)
 
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O

olivere

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Longtime User
Erel said:
I'm unable to reproduce it. Are you using B4A v12.8+ ?
Click to expand...
Yes, the problem occurs both with B4A 12.8 and 13 BETA; both with older java version (11.0.1) and newest (19.0.2)

To check, whether the httpjob object is initialized, I enhanced the code a little bit:
B4X: 
Private Sub Button1_Click
    Dim fTicksIni As Long = DateTime.Now
    Dim fTicksEnd As Long
    Dim fTicksEnd As Long
    Dim j As HttpJob
    j.Initialize("", Me)
    Log("Starting Init")
    Do While j.IsInitialized =False
    Sleep(1000)
    Loop
    fTicksEnd= DateTime.Now
    Log( "Completed after "&NumberFormat((((((fTicksEnd-fTicksIni)/DateTime.TicksPerSecond)))),1,4) &" seconds"  )
   
    Log("Starting Download")
    fTicksIni  = DateTime.Now
    j.Download("https://www.b4x.com")
    Label1.Text = "Waiting..."
    Wait For (j) JobDone(j As HttpJob)
    If j.Success Then
        Label1.Text = j.GetString
        fTicksEnd= DateTime.Now
        Log( "Completed after "&NumberFormat((((((fTicksEnd-fTicksIni)/DateTime.TicksPerSecond)))),1,4) &" seconds"  )
    End If
    j.Release
End Sub

But the result is the same: initialization is done, but the first request takes an eternity.. All subsequent requests are ok..

B4X: 
Logger connected to:  samsung SM-A256B
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
StartHttpUtils2Service
*** Receiver (httputils2service) Receive (first time) ***
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
Starting Init
Completed after 0 seconds
Starting Download
Completed after 90.9 seconds
Starting Init
Completed after 0.001 seconds
Starting Download
Completed after 0.536 seconds
Starting Init
Completed after 0.001 seconds
Starting Download
Completed after 0.311 seconds
 
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O

olivere

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Longtime User
Erel said:
I'm unable to reproduce it. Are you using B4A v12.8+ ?
Click to expand...
On the Samsung A04 (Android 14), the following error occurs:

B4X: 
Logger connected to:  samsung SM-A047F
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
StartHttpUtils2Service
*** Receiver (httputils2service) Receive (first time) ***
*** mainpage: B4XPage_Created
*** mainpage: B4XPage_Appear
** Activity (main) Resume **
** Service (starter) Start **
Starting Init
Completed after 0.001 seconds
Starting Download
** Activity (main) Pause event (activity is not paused). **
** Service (starter) Destroy (ignored)**
java.lang.RuntimeException: Unable to create service b4a.example.starter: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.OutputStream.write(byte[])' on a null object reference
    at android.app.ActivityThread.handleCreateService(ActivityThread.java:5111)
    at android.app.ActivityThread.-$$Nest$mhandleCreateService(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2506)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loopOnce(Looper.java:230)
    at android.os.Looper.loop(Looper.java:319)
    at android.app.ActivityThread.main(ActivityThread.java:8893)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.OutputStream.write(byte[])' on a null object reference
    at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:164)
    at anywheresoftware.b4a.shell.Shell.start(Shell.java:102)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:105)
    at b4a.example.starter.onCreate(starter.java:34)
    at android.app.ActivityThread.handleCreateService(ActivityThread.java:5098)
    ... 9 more
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.io.OutputStream.write(byte[])' on a null object reference
    at anywheresoftware.b4a.shell.ShellConnector.sendControlMessage(ShellConnector.java:61)
    at anywheresoftware.b4a.shell.Shell.virtualAssets(Shell.java:124)
    ... 13 more

All my test devices have Samsung Knox preinstalled - maybe this might be a reason ?
 
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O

olivere

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teddybear said:
What network are you using?, try to change ISP to do that.
Click to expand...
Thank you for this hint: if I disable WiFi and use regular mobile data to go into internet, everything works well.

@Erel: so the problem seem to be caused by the Wifi connectivity. Do you have a solution how to solve it, for many user prefer using Wifi networks to save mobile data costs.
 
Last edited:
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teddybear

teddybear

Well-Known Member
Licensed User
It is not related to WiFi, the issue is from your ISP, you need to contact your ISP for the solution.
To many users, is the wifi they use from same ISP? not all wifi networks of ISP behave like that. I think Erel's testing also uses WiFi.
 
Last edited:
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O

olivere

Member
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Longtime User
teddybear said:
It is not related to WiFi, the issue is from your ISP, you need to contact your ISP for the solution.
To many users, is the wifi they use from same ISP? not all wifi networks of ISP behave like that. I think Erel's testing also uses WiFi.
Click to expand...
I'm very sure that the problem has nothing to do with the ISP. Other apps and common internet functionality on the phone are working well with WiFi, the problem only occurs with B4A and httpjob in newer versions. Apps built with former versions of okhttputils2 (before changing to receiver mode) are also working well.
 
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Daestrum

Daestrum

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Could you not try it with Knox turned off?
 
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TILogistic

TILogistic

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It could be due to the remote server request cache, I have experienced the difference in response time compared to the first request.

ex.
1724699949677.png
 
Last edited:
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O

olivere

Member
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Longtime User
It is not related to WiFi, the issue is from your ISP, you need to contact your ISP for the solution.
To many users, is the wifi they use from same ISP? not all wifi networks of ISP behave like that. I think Erel's testing also uses WiFi.
Click to expand...
In meantime, I tried some different other wifi networks - and using other wifi, it works. One of the working wifi has the same ISP as the wifi showing the problem, so I think this should be a confirmation that the reason is not located in the ISP.

It could be due to the remote server request cache, I have experienced the difference in response time compared to the first request.
Click to expand...
Generally yes, but not in this case: both the delay time is much too long and the problem also occurs when changing the url to other servers

Could you not try it with Knox turned off?
Click to expand...
In meantime I also tried this, but not effect
 
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S

Spavlyuk

Active Member
Licensed User
I've used the following code in one of my apps where I had a similar issue, maybe it will work for you.

B4X: 
StartReceiver(HttpUtils2Service)
Do While HttpUtils2Service.TempFolder = ""
    Sleep(100)
    Log("Waiting for HttpUtils2Service...")
Loop
 
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O

olivere

Member
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Erel said:
It doesn't look like a problem in OkHttp or OkHttpUtils2.

It is a problem with your wifi.
Click to expand...
Tx Erel, but what do you suggest ?
In most cases, users do not have any possibilities to change/examine wifi configuration, for they have no access to router settings.
Also, the problem only exists with (newer) B4A apps, other apps are working well in the same wifi..
 
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O

olivere

Member
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Longtime User
Spavlyuk said:
I've used the following code in one of my apps where I had a similar issue, maybe it will work for you.

B4X: 
StartReceiver(HttpUtils2Service)
Do While HttpUtils2Service.TempFolder = ""
    Sleep(100)
    Log("Waiting for HttpUtils2Service...")
Loop
Click to expand...
TX, but this also does not help
 
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Erel

Erel

B4X founder
Staff member
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olivere said:
Tx Erel, but what do you suggest ?
In most cases, users do not have any possibilities to change/examine wifi configuration, for they have no access to router settings.
Also, the problem only exists with (newer) B4A apps, other apps are working well in the same wifi..
Click to expand...
It looks like a problem not related to B4A.
We are all using OkHttpUtil2 with wifi connections, all day long, with no issues.
 
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teddybear

teddybear

Well-Known Member
Licensed User
You can do a simple test . deploy a webserver for that on LAN , and then run the app to see what happens.
For apps of client and server, they don't care whether data communication is via LAN or WAN
 
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