Add getAttachment operation to the gmail connector

src/main/resources/messages/component.xml

@@ -50,5 +50,9 @@
             <file>deleteMessages.xml</file>
             <description>delete the message</description>
         </component>
+        <component name="getAttachment">
+            <file>getAttachment.xml</file>
+            <description>get the attachment</description>
+        </component>
     </subComponents>
 </component>

src/main/resources/messages/deleteMessages.xml

@@ -19,6 +19,8 @@
 <template name="deleteMessages" xmlns="http://ws.apache.org/ns/synapse">
     <parameter name="id" description="The ID of the message to delete"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.id" expression="$func:id"/>
         <call>
             <endpoint>

src/main/resources/messages/getAttachment.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ~  Copyright (c) 2020, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
+ ~
+ ~  WSO2 Inc. licenses this file to you under the Apache License,
+ ~  Version 2.0 (the "License"); you may not use this file except
+ ~  in compliance with the License.
+ ~  You may obtain a copy of the License at
+ ~
+ ~    http://www.apache.org/licenses/LICENSE-2.0
+ ~
+ ~  Unless required by applicable law or agreed to in writing,
+ ~  software distributed under the License is distributed on an
+ ~  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ ~  KIND, either express or implied.  See the License for the
+ ~  specific language governing permissions and limitations
+ ~  under the License.
+-->
+<template name="getAttachment" xmlns="http://ws.apache.org/ns/synapse">
+    <parameter name="id" description="The ID of the message to retrieve"/>
+    <parameter name="attachmentId" description="The attachment ID of the attachment to download"/>
+    <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
+        <property name="uri.var.id" expression="$func:id"/>
+        <property name="uri.var.attachmentId" expression="$func:attachmentId"/>
+        <call>
+            <endpoint name="Attachment">
+                <http method="get" uri-template="{+uri.var.gmail.apiUrl}/{+uri.var.gmail.apiVersion}/users/{+uri.var.gmail.userId}/messages/{+uri.var.id}/attachments/{+uri.var.attachmentId}">
+                </http>
+            </endpoint>
+        </call>
+        <!-- Remove response custom header information -->
+        <header name="x-li-format" scope="transport" action="remove"/>
+        <header name="X-LI-UUID" scope="transport" action="remove"/>
+        <header name="X-Li-Pop" scope="transport" action="remove"/>
+        <header name="X-Li-Fabric" scope="transport" action="remove"/>
+        <header name="x-li-request-id" scope="transport" action="remove"/>
+    </sequence>
+</template>

src/main/resources/messages/listAllMails.xml

@@ -27,6 +27,8 @@
     <parameter name="q"
                description="Only return messages matching the specified query. Supports the same query format as the Gmail search box"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.includeSpamTrash" expression="$func:includeSpamTrash"/>
         <property name="uri.var.labelIds" expression="$func:labelIds"/>
         <property name="uri.var.maxResults" expression="$func:maxResults"/>

src/main/resources/messages/modifyExistingMessages.xml

@@ -22,6 +22,8 @@
     <parameter name="removeLabelIds"
                description="A list of IDs of labels to remove from this message"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.id" expression="$func:id"/>
         <property name="uri.var.addLabelIds" expression="$func:addLabelIds"/>
         <property name="uri.var.removeLabelIds" expression="$func:removeLabelIds"/>

src/main/resources/messages/readMail.xml

@@ -22,6 +22,8 @@
     <parameter name="metadataHeaders"
                description="When given and format is METADATA, only include headers specified"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.id" expression="$func:id"/>
         <property name="uri.var.format" expression="$func:format"/>
         <property name="uri.var.metadataHeaders" expression="$func:metadataHeaders"/>

src/main/resources/messages/sendMail.xml

@@ -27,6 +27,8 @@
     <parameter name="threadId" description="To whom sender need to bcc the mail"/>
     <parameter name="contentType" description="The Content type of the message Body"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.to" expression="$func:to"/>
         <property name="uri.var.subject" expression="$func:subject"/>
         <property name="uri.var.from" expression="$func:from"/>

src/main/resources/messages/sendMailWithAttachment.xml

@@ -25,6 +25,8 @@
     <parameter name="fileName" description="(Optional) A comma separated list of content IDs(should be same as the file names) of attachments"/>
     <parameter name="filePath" description="(Optional) A comma separated list of file paths"/>
     <sequence>
+            <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
             <property name="Operator Name" value="Gmail : SendMail"/>
             <property name="subject" expression="$func:subject"/>
             <property name="toRecipients" expression="$func:to"/>

src/main/resources/messages/trashMessages.xml

@@ -19,6 +19,8 @@
 <template name="trashMessages" xmlns="http://ws.apache.org/ns/synapse">
     <parameter name="id" description="The ID of the message to retrieve"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.id" expression="$func:id"/>
         <call>
             <endpoint>

src/main/resources/messages/unTrashMessages.xml

@@ -19,6 +19,8 @@
 <template name="unTrashMessages" xmlns="http://ws.apache.org/ns/synapse">
     <parameter name="id" description="The ID of the message to retrieve"/>
     <sequence>
+        <header name="Authorization" expression="fn:concat('Bearer ', $ctx:uri.var.gmail.accessToken)"
+                scope="transport"/>
         <property name="uri.var.id" expression="$func:id"/>
         <call>
             <endpoint>