Unable to upload a new image product with the webservice

[edkalel]

Hi all,

 

I'm trying to upload a new image for a product with the prestashop webservice through a vb .net application, but I get the following error message:

 

"Unable to save this image".

 

The URL used to upload the image is this: 

http://localhost/prestashop/api/images/products/1

And the source code of the function that make the request is this:

Public Sub executeAddImage(ByVal resource As String, ByVal id As String, ByVal imageToAdd As Image)
        Dim response As String = Nothing

        Try
            Dim ms As New MemoryStream()
            imageToAdd.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
            Dim byteArray As Byte() = ms.ToArray()

            Dim requestUrl As String = Me.WebServiceURL & "/" & resource & "/" & id
            MsgBox(requestUrl)
            Dim webRequest As HttpWebRequest = DirectCast(System.Net.WebRequest.Create(requestUrl), HttpWebRequest)
            webRequest.Method = WebServicePrestashop.CRUDMethod.Create
            'webRequest.ContentType = "image/jpeg"
            webRequest.ContentType = "application/x-www-form-urlencoded"
            webRequest.Credentials = New NetworkCredential(Me.LoginName, WebServicePrestashop._password)
            webRequest.ContentLength = byteArray.Length
            MsgBox(byteArray.Length)
            ' Get the request stream
            Using dataStream As Stream = webRequest.GetRequestStream()
                dataStream.Write(byteArray, 0, byteArray.Length)
            End Using

            ' Get the response
            Using webResponse As HttpWebResponse = DirectCast(webRequest.GetResponse(), HttpWebResponse)
                If webResponse.StatusCode = HttpStatusCode.OK Then
                    Using reader As New StreamReader(webResponse.GetResponseStream(), Encoding.UTF8)
                        Dim imageNew As Image = Image.FromStream(webResponse.GetResponseStream())
                    End Using
                End If
            End Using

        Catch ex As WebException
            MsgBox(ex.Message.ToString())
            Dim reader As New StreamReader(ex.Response.GetResponseStream)
            MsgBox(reader.ReadToEnd)
        End Try
    End Sub

I'm using the HTTP POST method, and the POST content is the bynary content of the new image.

 

How can I fix it?.

Edited September 9, 2014 by edkalel (see edit history)

[edkalel]

Hi all,

 

I'm trying to upload a new image for a product with the prestashop webservice through a vb .net application, but I get the following error message:

 

"Unable to save this image".

 

The URL used to upload the image is this: 

http://localhost/prestashop/api/images/products/1

And the source code of the function that make the request is this:

Public Sub executeAddImage(ByVal resource As String, ByVal id As String, ByVal imageToAdd As Image)
        Dim response As String = Nothing

        Try
            Dim ms As New MemoryStream()
            imageToAdd.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
            Dim byteArray As Byte() = ms.ToArray()

            Dim requestUrl As String = Me.WebServiceURL & "/" & resource & "/" & id
            MsgBox(requestUrl)
            Dim webRequest As HttpWebRequest = DirectCast(System.Net.WebRequest.Create(requestUrl), HttpWebRequest)
            webRequest.Method = WebServicePrestashop.CRUDMethod.Create
            'webRequest.ContentType = "image/jpeg"
            webRequest.ContentType = "application/x-www-form-urlencoded"
            webRequest.Credentials = New NetworkCredential(Me.LoginName, WebServicePrestashop._password)
            webRequest.ContentLength = byteArray.Length
            MsgBox(byteArray.Length)
            ' Get the request stream
            Using dataStream As Stream = webRequest.GetRequestStream()
                dataStream.Write(byteArray, 0, byteArray.Length)
            End Using

            ' Get the response
            Using webResponse As HttpWebResponse = DirectCast(webRequest.GetResponse(), HttpWebResponse)
                If webResponse.StatusCode = HttpStatusCode.OK Then
                    Using reader As New StreamReader(webResponse.GetResponseStream(), Encoding.UTF8)
                        Dim imageNew As Image = Image.FromStream(webResponse.GetResponseStream())
                    End Using
                End If
            End Using

        Catch ex As WebException
            MsgBox(ex.Message.ToString())
            Dim reader As New StreamReader(ex.Response.GetResponseStream)
            MsgBox(reader.ReadToEnd)
        End Try
    End Sub

I'm using the HTTP POST method, and the POST content is the bynary content of the new image.

 

How can I fix it?.

 

Here the solution.

I think the key is that I must write the body of the webrequest programatically adding to the stream of the webrequest the boundary (in binary array format), the Content-Type chain (in binary array format) and the content of the image to upload (in binary array format).

Public Sub executeAddImage(ByVal resource As String, ByVal id As String, ByVal imageToAdd As Byte())
Dim response As String = Nothing


Try
Dim requestUrl As String = "urlShop" & "/api/" & resource & "/" & id
MsgBox(requestUrl)
Dim webRequest As HttpWebRequest = DirectCast(System.Net.WebRequest.Create(requestUrl), HttpWebRequest)
webRequest.KeepAlive = True
webRequest.Credentials = New NetworkCredential(Me.LoginName, WebServicePrestashop._password)
webRequest.ContentLength = imageToAdd.Length
webRequest.Method = "POST"
webRequest.ContentType = "image/jpeg"


Dim boundary As String = "----" & DateTime.Now.Ticks.ToString("x", CultureInfo.InvariantCulture)
webRequest.ContentType = "multipart/form-data; boundary=" & boundary
Dim beginPostData = "--" & boundary & vbCrLf & "Content-Disposition: form-data; name=""image""; filename=""torrente.jpg""" & _
vbCrLf & "Content-Type: image/jpeg" & vbCrLf & vbCrLf
Dim boundaryBytes = System.Text.Encoding.ASCII.GetBytes(vbCrLf & "--" & boundary & "--" & vbCrLf)
Dim beginPostDataBytes = System.Text.Encoding.ASCII.GetBytes(beginPostData)


webRequest.ContentLength = beginPostData.Length + imageToAdd.Length + boundaryBytes.Length


' Get the request stream
Using dataStream As Stream = webRequest.GetRequestStream()
dataStream.Write(beginPostDataBytes, 0, beginPostDataBytes.Length)
dataStream.Write(imageToAdd, 0, imageToAdd.Length)
dataStream.Write(boundaryBytes, 0, boundaryBytes.Length)
End Using


' Get the response
Using webResponse As HttpWebResponse = DirectCast(webRequest.GetResponse(), HttpWebResponse)
If webResponse.StatusCode = HttpStatusCode.OK Then
Using reader As New StreamReader(webResponse.GetResponseStream())
response = reader.ReadToEnd()
MsgBox(response)
End Using
End If
End Using


Catch ex As WebException
MsgBox(ex.Message.ToString())
Dim reader As New StreamReader(ex.Response.GetResponseStream)
MsgBox(reader.ReadToEnd)
End Try
End Sub

 

[rajlaskar]

refer my post on this thread http://www.prestashop.com/forums/topic/220964-add-product-image-via-webservice/?do=findComment&comment=1856702