(PowerShell) Get GMail Message Metadata

Demonstrates how to get the metadata for each message in a list of message IDs.

For more information, see https://developers.google.com/gmail/api/v1/reference/users/messages/get

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$http = New-Object Chilkat.Http

$http.AuthToken = "ACCESS_TOKEN"

$http.Accept = "application/json"

# Let's say we have the following JSON containing a list of message ID's

# {
#   "messages": [
#     {
#       "id": "1712bc1dc22da2a2",
#       "threadId": "1712bc1dc22da2a2"
#     },
#     {
#       "id": "1712b94fa2168040",
#       "threadId": "1712b94fa2168040"
#     },
#     {
#       "id": "1711e4bd96ded05e",
#       "threadId": "1711e4bd96ded05e"
#     },
#     {
#       "id": "1711de0d119e751e",
#       "threadId": "1711de0d119e751e"
#     },
#     {
#       "id": "1711c81a43050f59",
#       "threadId": "1711c81a43050f59"
#     },
#     {
#       "id": "1711c2c1516abce5",
#       "threadId": "1711c2c1516abce5"
#     },
#     {
#       "id": "1711c161e655c915",
#       "threadId": "1711c161e655c915"
#     },
#     {
#       "id": "171199c6e454558c",
#       "threadId": "171199c6e454558c"
#     },
#     {
#       "id": "17119474c8aa248e",
#       "threadId": "17119474c8aa248e"
#     }
#   ],
#   "nextPageToken": "16710921492249671162",
#   "resultSizeEstimate": 309
# }

# Normally your program would have the above JSON in a string variable (obtained from a previous call to get
# a list of message IDs from a GMail mailbox).  In this example, we'll load the JSON from a file.
$jsonMsgIds = New-Object Chilkat.JsonObject
$success = $jsonMsgIds.LoadFile("qa_data/json/gmail_message_ids.json")

$i = 0
$count_i = $jsonMsgIds.SizeOfArray("messages")
while ($i -lt $count_i) {
    $jsonMsgIds.I = $i
    $id = $jsonMsgIds.StringOf("messages[i].id")

    # Get the metadata for this message ID.
    $http.SetUrlVar("id",$id)

    $resp = $http.QuickRequest("GET","https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=metadata")
    if ($http.LastMethodSuccess -ne $true) {
        $($http.LastErrorText)
        exit
    }

    $("Response Status Code: " + $resp.StatusCode)

    $jsonResponse = New-Object Chilkat.JsonObject
    $jsonResponse.Load($resp.BodyStr)
    $jsonResponse.EmitCompact = $false
    $($jsonResponse.Emit())

    if ($resp.StatusCode -ne 200) {
        $("Failed.")

        exit
    }

    $i = $i + 1
}

# Use this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON