Layer7 API Management

I am trying to build a multipart mime message with the gateway. When creating such a message i retrieve a binary attachment from a database (let's say an image). I add the retrieved blob to a context var (of type message) and subsequently add it to the builded message after a boundary.

However when i add it to the message, it seems the gateway intereprets the message as text and the file is not readable anymore.

My question is: how can i build a multipart mime message with a binary attachment (which i retrieve from a database) with the gateway?

Many thanks,

Jan Jaap Zoutendijk

Hi Jan,

Should it be Base64 encoded first?

Regards,

Mark

Hi Mark,

Thank you for your response. The file should not be base64 encoded first, i'm trying to send the original file.

Regards,

Jan Jaap

Hello Jan,

Here is a sample policy for multi-part response. But it's for text. I'm not sure if you can load binary data into a context variable ${attachment}, if yes, then you can use this policy.

<?xml version="1.0" encoding="UTF-8"?>

<wsp:Policy xmlns:L7p="http://www.layer7tech.com/ws/policy" xmlns:wsp="http://schemas.xmlsoap.org/ws/2002/12/policy">

    <wsp:All wsp:Usage="Required">

        <L7p:SetVariable>

            <L7p:AssertionComment assertionComment="included">

                <L7p:Properties mapValue="included">

                    <L7p:entry>

                        <L7p:key stringValue="LEFT.COMMENT"/>

                        <L7p:value stringValue="v2 - 1"/>

                    </L7p:entry>

                </L7p:Properties>

            </L7p:AssertionComment>

            <L7p:Base64Expression stringValue="VGhpcyBpcyBhbiBhdHRhY2htZW50Lg=="/>

            <L7p:VariableToSet stringValue="attachment"/>

        </L7p:SetVariable>

        <L7p:SetVariable>

            <L7p:AssertionComment assertionComment="included">

                <L7p:Properties mapValue="included">

                    <L7p:entry>

                        <L7p:key stringValue="LEFT.COMMENT"/>

                        <L7p:value stringValue="v2 - 2"/>

                    </L7p:entry>

                </L7p:Properties>

            </L7p:AssertionComment>

            <L7p:Base64Expression stringValue="LS1YWFhYYm91bmRhcnkNCkNvbnRlbnQtVHlwZTogdGV4dC9wbGFpbg0KDQp0aGlzIGlzIHRoZSBib2R5IHRleHQNCg0KLS1YWFhYYm91bmRhcnkNCkNvbnRlbnQtRGVzY3JpcHRpb246IEZpbGUgVHJhbnNmZXINCkNvbnRlbnQtRGlzcG9zaXRpb246IGF0dGFjaG1lbnQ7ZmlsZW5hbWU9InRlc3QudHh0Ig0KQ29udGVudC1UeXBlOiBhcHBsaWNhdGlvbi9vY3RldC1zdHJlYW0NCkNvbnRlbnQtVHJhbnNmZXItRW5jb2Rpbmc6IGJpbmFyeQ0KRXhwaXJlczogMA0KQ2FjaGUtQ29udHJvbDogbXVzdC1yZXZhbGlkYXRlLCBwb3N0LWNoZWNrPTAsIHByZS1jaGVjaz0wDQpQcmFnbWE6IHB1YmxpYw0KDQoke2F0dGFjaG1lbnR9DQoNCi0tWFhYWGJvdW5kYXJ5LS0="/>

            <L7p:VariableToSet stringValue="resp"/>

        </L7p:SetVariable>

        <L7p:HardcodedResponse>

            <L7p:AssertionComment assertionComment="included">

                <L7p:Properties mapValue="included">

                    <L7p:entry>

                        <L7p:key stringValue="LEFT.COMMENT"/>

                        <L7p:value stringValue="v2 -3"/>

                    </L7p:entry>

                </L7p:Properties>

            </L7p:AssertionComment>

            <L7p:Base64ResponseBody stringValue="JHtyZXNwfQ=="/>

            <L7p:ResponseContentType stringValue="multipart/mixed;boundary=XXXXboundary"/>

        </L7p:HardcodedResponse>

    </wsp:All>

</wsp:Policy>