Android Question [Solved]HttpJob

Ale_resource · May 11, 2021

Hi I should download a json from a web service via an api call ,This is the code I used :

    Dim JobDoc As HttpJob
    JobDoc.Initialize("JobDoc",Me)
    JobDoc.Download("https://webapide.aliasgrouplab.it/api/DocumentoAttivo/100009")
    JobDoc.GetRequest.SetHeader("APIKey","2b6dedd8efc2668b56b2d070424a436f0027134c293199724ee80.........")
    JobDoc.GetRequest.SetHeader("APISecret","47c55ace70212b27d79db9e5824d09541ea120de3e88bf8993c4152c62239b0df9382242e9570dd00e6cfcf3980ba74a95630305cf00661fe89d8......."")
    JobDoc.GetRequest.SetHeader("CodiceCliente","0185469.....")
    Wait For (JobDoc) JobDone(JobDoc As HttpJob)
    If JobDoc.Success Then
        Log(JobDoc.GetString)
    Else
        Log(JobDoc.ErrorMessage)
    End If

and this is the documentation :

but i can't download anything, i always get this error

I tried with Postman to manage the api and it works fine.
What am I doing wrong ?

agraham · May 11, 2021

Shouldn't you call Download AFTER setting the headers?

Star-Dust · May 11, 2021

Do you use HttpUtils or okHttpUtils?

Ale_resource · May 11, 2021

agraham said:
Shouldn't you call Download AFTER setting the headers?

no, as written by erel on other treads it must be set after calling download

Ale_resource · May 11, 2021

Star-Dust said:
Do you use HttpUtils or okHttpUtils?

i used the okhttputils2 library

mc73 · May 11, 2021

Set headers exactly as the ones used with postman. For example you may need to set the header of user-agent.

Ale_resource · May 11, 2021

Star-Dust said:
Do you use HttpUtils or okHttpUtils?

i used the okhttputils2 library

Ale_resource · May 11, 2021

mc73 said:
Set headers exactly as the ones used with postman. For example you may need to set the header of user-agent.

I also did that test, I copied all the postman headers (even the hidden ones) but the result doesn't change

mcqueccu · May 11, 2021

Can you post the documentation part about setting the headers?
And also, are you using cleartext in manifest
Finally post the full error as text for us to see where the problem is actually coming from

OliverA · May 12, 2021

Try

Code: Copy

Dim JobDoc As HttpJob
JobDoc.Initialize("",Me) ‘Just make it “”, not “JobDoc”
JobDoc.Download("https://webapide.aliasgrouplab.it/api/DocumentoAttivo/100009")
‘using a browser (safari on iPhone, the above without any extra headers just
‘Returns a blank page
 Wait For (JobDoc) JobDone(JobDoc As HttpJob)
 If JobDoc.Success Then
        Log(“good”)
        Log(JobDoc.GetString)
 Else
        Log(“bad”)
        Log(JobDoc.ErrorMessage)
 End If
JobDoc.Release ‘ don’t forget this

Note: you may need to replace the quotes (both double and single), since I’m typing this on an iPhone
This should give us a baseline to work with. First get this to work, then you can worry about headers

Ale_resource · May 12, 2021

mcqueccu said:
Can you post the documentation part about setting the headers?
And also, are you using cleartext in manifest
Finally post the full error as text for us to see where the problem is actually coming from

i tried both adding cleartext in manifest and without .
the only error I see is this, it doesn't print anything unfortunately. it looks as if get is called without having set the headers

i tried with this code copying the hidden postman headers (which works)

B4X: Copy

    Dim JobDoc As HttpJob

    JobDoc.Initialize("",Me)

    JobDoc.Download("https://webapide.aliasgrouplab.it/api/DocumentoAttivo/100012")

    JobDoc.GetRequest.SetHeader("APIKey",apikey)

    JobDoc.GetRequest.SetHeader("APISecret",apisecret)

    JobDoc.GetRequest.SetHeader("CodiceCliente",piva_cedente)

    JobDoc.GetRequest.SetHeader("Host","webapide.aliasgrouplab.it")

    JobDoc.GetRequest.SetHeader("Connection","keep-alive")

    JobDoc.GetRequest.SetHeader("Cache-Control","no-cache")

    Wait For (JobDoc) JobDone(JobDoc As HttpJob)

    If JobDoc.Success Then

        Log("good")

        Log(JobDoc.GetString)

    Else

        Log("bad")

        Log(JobDoc.ErrorMessage)

    End If

    JobDoc.Release

    Return True

Ale_resource · May 12, 2021

OliverA said:
Try

Code: Copy

Dim JobDoc As HttpJob JobDoc.Initialize("",Me) ‘Just make it “”, not “JobDoc” JobDoc.Download("https://webapide.aliasgrouplab.it/api/DocumentoAttivo/100009") ‘using a browser (safari on iPhone, the above without any extra headers just ‘Returns a blank page Wait For (JobDoc) JobDone(JobDoc As HttpJob) If JobDoc.Success Then Log(“good”) Log(JobDoc.GetString) Else Log(“bad”) Log(JobDoc.ErrorMessage) End If JobDoc.Release ‘ don’t forget this

Note: you may need to replace the quotes (both double and single), since I’m typing this on an iPhone
This should give us a baseline to work with. First get this to work, then you can worry about headers

you get a blank page because if you don't set the header you don't have the authorization

Peter Simpson · May 12, 2021

Show is the documentation about how to use the header when it comes to authentication.

Ale_resource · May 12, 2021

Peter Simpson said:
Show is the documentation about how to use the header when it comes to authentication.

This is the documentation

Traslate by google traslate :

To use the functions described below, you need to make HTTP / HTTPS calls using the relevant method.
To ensure secure access, all requests require an authentication token which can be obtained by initializing a session. The token must be passed in the header of the HTTP call, specifically within the Authentication key.
To ensure greater performance to calls, it is recommended to use API Keys instead of Username / Password authentication. To use this mechanism you need to generate the API keys from the DocEasy interface (API Key and API Secret) then send them in each call inserted in the HTTP call header as follows (the values are all required):
APIKey - the value of the generated APIKey key
APISecret: The generated APISecret key value
Customer Code: the VAT number of the customer for whom you want to operate (provided you have the authorization)

Ale_resource · May 12, 2021

trying with postman as shown in the image it works correctly, I can't understand

if on postman I disable all the headers I get an empty response, so it seems that my code is downloaded without taking into account the headers.

Andrew (Digitwell) · May 12, 2021

Have you considered the "content-type" and "accept" headers.
Normally you would have to set these to application/json.
do these appear in the postman headers?

In the example above it appears the accept header is text/plain

Ale_resource · May 12, 2021

Andrew (Digitwell) said:
Have you considered the "content-type" and "accept" headers.
Normally you would have to set these to application/json.
do these appear in the postman headers?

In the example above it appears the accept header is text/plain

On postman I only find this as hidden =
"Accept" : "*/*"
if I set the content type

B4X: Copy

JobDoc.GetRequest.SetContentType("application/json")

this error message appears :
java.lang.RuntimeException: Request does not support this method.
The strange thing is that if I call this api:

https://webapide.aliasgrouplab.it/api/About/version

which does not require any parameters in the header the code works
that's why I say that in my opinion the headers that I set before downloading are not taken

Andrew (Digitwell) · May 12, 2021

That is correct you always set the headers AFTER the download command.

for example.

B4X: Copy

    job.Initialize("",Me)
    Private str As String = $"${URLBase}/${currentFunction}${id}"$
    job.download(str)
    job.GetRequest.SetHeader("Authorization",$"Bearer ${currentToken}"$)
    job.GetRequest.SetHeader("accept","application/json")
    job.GetRequest.SetContentType("application/json")
    
    Wait For (job) JobDone(job As HttpJob)

This is taken from working code.

Ale_resource · May 12, 2021

Andrew (Digitwell) said:
That is correct you always set the headers AFTER the download command.

for example.

B4X: Copy

job.Initialize("",Me) Private str As String = $"${URLBase}/${currentFunction}${id}"$ job.download(str) job.GetRequest.SetHeader("Authorization",$"Bearer ${currentToken}"$) job.GetRequest.SetHeader("accept","application/json") job.GetRequest.SetContentType("application/json") Wait For (job) JobDone(job As HttpJob)

This is taken from working code.

if i put

B4X: Copy

job.GetRequest.SetContentType("application/json")

i have this error :

Ale_resource · May 12, 2021

Ale_resource said:
trying with postman as shown in the image it works correctly, I can't understand
View attachment 113226

if on postman I disable all the headers I get an empty response, so it seems that my code is downloaded without taking into account the headers.

i tried to add this code:

B4X: Copy

Log(JobDoc.Response.StatusCode)

and on the log appears 401 which corresponds to: Error: Unauthorized
so as I suspected, although the headers are set, they are not sent, why ??

Android Question [Solved]HttpJob

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