(PowerShell) Download Google Contact Photo

Demonstrates how to download Google Contact's photo.

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.

# --------------------------------------------------------------------------------------------------------
# Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
# Once connected, the REST object may be re-used for many REST API calls.
# (It's a good idea to put the connection setup code in a separate function/subroutine.)
# --------------------------------------------------------------------------------------------------------

# It is assumed we previously obtained an OAuth2 access token.
# This example loads the JSON access token file 
# saved by this example: Get Google Contacts OAuth2 Access Token

$jsonToken = New-Object Chilkat.JsonObject
$success = $jsonToken.LoadFile("qa_data/tokens/googleContacts.json")
if ($success -ne $true) {
    $("Failed to load googleContacts.json")
    exit
}

$gAuth = New-Object Chilkat.AuthGoogle
$gAuth.AccessToken = $jsonToken.StringOf("access_token")

$rest = New-Object Chilkat.Rest

# Connect using TLS.
$bAutoReconnect = $true
$success = $rest.Connect("www.google.com",443,$true,$bAutoReconnect)

# Provide the authentication credentials (i.e. the access token)
$rest.SetAuthGoogle($gAuth)

# ----------------------------------------------
# OK, the REST connection setup is completed..
# ----------------------------------------------

# To get the photo, send the following:

# 	GET /m8/feeds/photos/media/default/contactId

$rest.AddHeader("GData-Version","3.0")

$sbPath = New-Object Chilkat.StringBuilder
# Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
$contactId = "1ea2e4fe0ef24e09"
$sbPath.SetString("/m8/feeds/photos/media/default/{contactId}")
$numReplacements = $sbPath.Replace("{contactId}",$contactId)

$imageData = New-Object Chilkat.BinData
$success = $rest.FullRequestNoBodyBd("GET",$sbPath.GetAsString(),$imageData)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

# A 404 response indicates the contact has no photo.
# (We could've first fetched the contact information, parsed out the 
# photo etag, and then if no photo etag existed, we'd know the contact has no
# photo.  Or... we can just try to download the photo and if a 404 is received,
# we know there's no photo.  Much simpler.)
if ($rest.ResponseStatusCode -eq 404) {
    $("This contact has no photo.")
    exit
}

# A successful response will have a status code equal to 200.
if ($rest.ResponseStatusCode -ne 200) {
    # If the response was not successful, then the response body
    # does not contain image data.  Instead it contains XML.
    $sbResponseBody = New-Object Chilkat.StringBuilder
    $sbResponseBody.AppendBd($imageData,"utf-8",0,0)

    $("response status code = " + $rest.ResponseStatusCode)
    $("response status text = " + $rest.ResponseStatusText)
    $("response header: " + $rest.ResponseHeader)
    $("response body: " + $sbResponseBody.GetAsString())
    $("request startline: " + $rest.LastRequestStartLine)
    $("request header: " + $rest.LastRequestHeader)
    exit
}

# Examine the content-type in the response header so we know what file
# extension to use (.jpg, .png, etc.)
$sbContentType = New-Object Chilkat.StringBuilder
$sbContentType.Append($rest.ResponseHdrByName("Content-Type"))

if ($sbContentType.ContentsEqual("image/jpeg",$false) -eq $true) {
    $imageData.WriteFile("qa_output/contact_photo.jpg")
}

if ($sbContentType.ContentsEqual("image/png",$false) -eq $true) {
    $imageData.WriteFile("qa_output/contact_photo.png")
}

$("Content-Type: " + $sbContentType.GetAsString())
$("Success.")