Ruby

Download Google Contact Photo

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Demonstrates how to download Google Contact's photo. Ruby

require 'chilkat'

success = false

# 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 = Chilkat::CkJsonObject.new()
success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json")
if (success != true)
    print "Failed to load googleContacts.json" + "\n";
    exit
end

gAuth = Chilkat::CkAuthGoogle.new()
gAuth.put_AccessToken(jsonToken.stringOf("access_token"))

rest = Chilkat::CkRest.new()

# 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 = Chilkat::CkStringBuilder.new()
# 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 = Chilkat::CkBinData.new()
success = rest.FullRequestNoBodyBd("GET",sbPath.getAsString(),imageData)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

# 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.get_ResponseStatusCode() == 404)
    print "This contact has no photo." + "\n";
    exit
end

# A successful response will have a status code equal to 200.
if (rest.get_ResponseStatusCode() != 200)
    # If the response was not successful, then the response body
    # does not contain image data.  Instead it contains XML.
    sbResponseBody = Chilkat::CkStringBuilder.new()
    sbResponseBody.AppendBd(imageData,"utf-8",0,0)

    print "response status code = " + rest.get_ResponseStatusCode().to_s() + "\n";
    print "response status text = " + rest.responseStatusText() + "\n";
    print "response header: " + rest.responseHeader() + "\n";
    print "response body: " + sbResponseBody.getAsString() + "\n";
    print "request startline: " + rest.lastRequestStartLine() + "\n";
    print "request header: " + rest.lastRequestHeader() + "\n";
    exit
end

# Examine the content-type in the response header so we know what file
# extension to use (.jpg, .png, etc.)
sbContentType = Chilkat::CkStringBuilder.new()
sbContentType.Append(rest.responseHdrByName("Content-Type"))

if (sbContentType.ContentsEqual("image/jpeg",false) == true)
    imageData.WriteFile("qa_output/contact_photo.jpg")
end

if (sbContentType.ContentsEqual("image/png",false) == true)
    imageData.WriteFile("qa_output/contact_photo.png")
end

print "Content-Type: " + sbContentType.getAsString() + "\n";
print "Success." + "\n";