Android Question [Solved]Upload file with PostMultipart

[samperizal]

Greetings.
I want to use a web api (Tested with postman and c#).
This has two parameters, a file and a token. The file does not reach the webapi. This is the code I am using.

        Dim URL As String = "https://a373-84-79-160-209.ngrok-free.app/Reconocimiento/Reconocer"
        Dim j As HttpJob

        j.Initialize("", Me)
        Dim fd As MultipartFileData
        fd.Initialize
        fd.KeyName = "file"

        fd.Dir = File.DirDefaultExternal
        fd.FileName =  "ejemplo.jpg"
            fd.ContentType = "image/jpg"

        j.PostMultipart(URL, CreateMap("Token": "1234"),Array(fd))

        Wait For (j) JobDone(j As HttpJob)

        If j.Success Then

            Leer_Json_Respuesta_json (j.GetString)
        Else
            Log ("error")
            Log(j.ErrorMessage)
            Log(LastException)

        End If
        j.Release

Thank you.

 

[JohnC]

ChatGPT suggestes try changing the line:

fd.ContentType = "image/jpg"
'to
fd.ContentType = "image/jpeg"

 

[samperizal]

It is not solved

 

[JohnC]

As a test, I would also try moving the source file from "File.DirDefaultExternal" to "File.DirInternal" just in case your app/device doesn't allow permission to access .DirDefaultExternal

 

[samperizal]

the file does not arrive

 

[MicroDrie]

the file does not arrive

Well, I ran into a similar challenge . When you go to the web page https://a373-84-79-160-209.ngrok-free.app/Reconocimiento/Reconocer for the first time, you must first click on the "Visite site" button. When a cookie is placed in your browser with your visit time in it. How does your program ensure that it uses the cookie consent function "you first click on the Visit Site to go on" button ? If that doesn't happen, then (just like it was the case with me) it will be an endless wait.

 

[MicroDrie]

My workaround is not pretty, but it works by first visiting the site in web view, giving consent (the site places a cookie in the web view environment) and leaving out the consent cookie wall. So what you are looking for is a way to give permission with a B4A/B4J program so that the cookie is placed and the cookie wall is omitted.

 

[aeric]

j.PostMultipart(URL, CreateMap("Token": "1234"),Array(fd))

try:

Dim Map1 As Map = CreateMap("Token": "1234")
Dim List1 As List
List1.Initialize
List1.Add(fd)
j.PostMultipart(URL, Map1, List1)

 

[samperizal]

Greetings.
Still not uploading the file. I have made a routine in c# and it works correctly and the same in postman.

 

[aeric]

Is your server online and do you have sample B4A project?

 

[Andrew (Digitwell)]

Can you provide a postman file of a working connection?

 

[samperizal]

Solved.
Change fd.ContentType = "image/jpg" to fd.ContentType="multipart/form-data"