Send an image as a multi part File

Hello,

Thanks Marc Mundt for your help,

1 We have tried with the following code which reads a String which represents an image in pRequest.imagen and we send it into a MIME:

Class Operaciones.REST.miSCS.miSCSSubirImagenJPGlocal Extends EnsLib.REST.Operation { Parameter INVOCATION = "Queue";

/// 📤 Subir la imagenSanitaria
Method SubirImagen(pRequest As Mensajes.Request.miSCS.SubirImagen, pResponse As Mensajes.Response.miSCS.SubirImagen) As %Library.Status
{
    
    Set httpRequest=##class(%Net.HttpRequest).%New()
    set tResponse = ##class(%Net.HttpResponse).%New()
    
    Set msg=##class(%Net.MIMEPart).%New()
     Set msg.Body=##class(%GlobalCharacterStream).%New()
    Do msg.Body.Write(pRequest.imagen)
    Set msg.ContentType="multipart/form-data"
    
    // create MIME writer; write root MIME message
    Set writer=##class(%Net.MIMEWriter).%New()

    // Prepare outputting to the HttpRequestStream
    Set status=writer.OutputToStream(httpRequest.EntityBody)
    if $$$ISERR(status) {do $SYSTEM.Status.DisplayError(status) Quit}

    // Now write down the content
    Set status=writer.WriteMIMEBody(msg)
    if $$$ISERR(status) {do $SYSTEM.Status.DisplayError(status) Quit}
    
    set url      = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","url")
    set path     = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","path")
    set servicio = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","servicio")
    set recurso  = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","subirImagen")
            
    set URL = "http://"_url_path_servicio_recurso
    $$$LOGINFO("URL: "_URL)

    set tFormVarNames = "expediente,imagen"
    set tData("expediente") = pRequest.expediente
    set tData("imagen") = pRequest.imagen

    set tSC = ..Adapter.SendFormDataArray(.tResponse,"POST",httpRequest,.tFormVarNames,.tData,URL)
    $$$LOGINFO("tSC: "_tSC)
    
    if $$$ISERR(tSC){
            $$$ThrowOnError(tSC)
    }
    if (tResponse.Data.AtEnd = 0) {
        $$$LOGINFO("En SubirImagen, tamaño de tResponse: "_tResponse.Data.Size)
        set linea = tResponse.Data.Read()
        $$$LOGINFO("Linea: "_linea)
    }
    
    set pResponse = ##class(Mensajes.Response.miSCS.SubirImagen).%New()
    do pResponse.return.Write(linea)

    Quit pResponse
}

However when we see it using Whireshark we observe that it is being sent as text/html

2 We have also used the following approach, to read a JPG directly and send it into the MIME:

Class Operaciones.REST.miSCS.miSCSSubirImagenJPGlocal Extends EnsLib.REST.Operation
{

Parameter INVOCATION = "Queue";

/// 📤 Subir la imagenSanitaria
Method SubirImagen(pRequest As Mensajes.Request.miSCS.SubirImagen, pResponse As Mensajes.Response.miSCS.SubirImagen) As %Library.Status
{
    
    //Crear Request y Response HTTP
    Set httpRequest=##class(%Net.HttpRequest).%New()
    set tResponse = ##class(%Net.HttpResponse).%New()
    
    //Crear MIME
    Set msg=##class(%Net.MIMEPart).%New()
     Set msg.Body=##class(%GlobalCharacterStream).%New()
     
    //Probamos a leer una imagen local y a enviarla
    Set stream=##class(%Stream.FileCharacter).%New()
      Set sc=stream.LinkToFile("C:\Users\ext-ymorjim\Pictures\miSCS.jpg")
      While 'stream.AtEnd {
          Set linea=stream.Read()
      }
      $$$LOGINFO("linea: "_linea)
      
      //Escribir la imagen en el mensaje MIME
     Do msg.Body.Write(linea)
    //Do msg.Body.Write(pRequest.imagen)
    Set msg.ContentType="multipart/form-data"
    
    // create MIME writer; write root MIME message
    Set writer=##class(%Net.MIMEWriter).%New()

    // Prepare outputting to the HttpRequestStream
    Set status=writer.OutputToStream(httpRequest.EntityBody)
    if $$$ISERR(status) {do $SYSTEM.Status.DisplayError(status) Quit}

    // Now write down the content
    Set status=writer.WriteMIMEBody(msg)
    if $$$ISERR(status) {do $SYSTEM.Status.DisplayError(status) Quit}
    

    set url      = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","url")
    set path     = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","path")
    set servicio = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","servicio")
    set recurso  = ##class(Util.TablasMaestras).getValorMaestra("MISCS.PARAMETRIZACIONES","subirImagen")
            
    set URL = "http://"_url_path_servicio_recurso
    $$$LOGINFO("URL: "_URL)

    set tFormVarNames = "expediente,imagen"
    set tData("expediente") = pRequest.expediente
    set tData("imagen") = pRequest.imagen
    //set tData("imagen") = linea

    set tSC = ..Adapter.SendFormDataArray(.tResponse,"POST",httpRequest,.tFormVarNames,.tData,URL)
    $$$LOGINFO("tSC: "_tSC)
    
    if $$$ISERR(tSC){
            $$$ThrowOnError(tSC)
    }
    if (tResponse.Data.AtEnd = 0) {
        $$$LOGINFO("En SubirImagen, tamaño de tResponse: "_tResponse.Data.Size)
        set linea = tResponse.Data.Read()
        $$$LOGINFO("Linea: "_linea)
    }
    
    set pResponse = ##class(Mensajes.Response.miSCS.SubirImagen).%New()
    do pResponse.return.Write(linea)

    Quit pResponse
}

With the previous code we see that a text/html is being sent too:

In both cases, the external system gives us a HTTP code 400:

     ERROR <Ens>ErrException: <THROW>zSubirImagen+40^Operaciones.REST.miSCS.miSCS.1 *%Exception.StatusException ERROR <Ens>ErrHTTPStatus: Received non-OK status 400 from remote HTTP server: 'HTTP/1.1 400 ' -- logged as '-' number - @' Set sc=tSC Throw:('sc) ##class(%Exception.StatusException).ThrowIfInterrupt(sc)'

How could we achieve to send it in the correct way? as it is being sent when we use POSTMAN:

How could we send the image as multipart/form-data?

> We have read:

https://docs.intersystems.com/irisforhealthlatest/csp/docbook/DocBook.UI...

https://docs.intersystems.com/irisforhealthlatest/csp/docbook/Doc.View.c...

How could we send the image as multipart/form-data as it is being sent by Postman?

➡️ Could you point us to same code examples, please?