PureBasic

Download Google Contact Photo

See more Google APIs Examples

Demonstrates how to download Google Contact's photo. PureBasic

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkAuthGoogle.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkJsonObject.pb"
IncludeFile "CkBinData.pb"

Procedure ChilkatExample()

    success.i = 0

    ; 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.i = CkJsonObject::ckCreate()
    If jsonToken.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkJsonObject::ckLoadFile(jsonToken,"qa_data/tokens/googleContacts.json")
    If success <> 1
        Debug "Failed to load googleContacts.json"
        CkJsonObject::ckDispose(jsonToken)
        ProcedureReturn
    EndIf

    gAuth.i = CkAuthGoogle::ckCreate()
    If gAuth.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkAuthGoogle::setCkAccessToken(gAuth, CkJsonObject::ckStringOf(jsonToken,"access_token"))

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Connect using TLS.
    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"www.google.com",443,1,bAutoReconnect)

    ; Provide the authentication credentials (i.e. the access token)
    CkRest::ckSetAuthGoogle(rest,gAuth)

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

    ; To get the photo, send the following:

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

    CkRest::ckAddHeader(rest,"GData-Version","3.0")

    sbPath.i = CkStringBuilder::ckCreate()
    If sbPath.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Get the photo for the contact having contactId = "1ea2e4fe0ef24e09"
    contactId.s = "1ea2e4fe0ef24e09"
    CkStringBuilder::ckSetString(sbPath,"/m8/feeds/photos/media/default/{contactId}")
    numReplacements.i = CkStringBuilder::ckReplace(sbPath,"{contactId}",contactId)

    imageData.i = CkBinData::ckCreate()
    If imageData.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkRest::ckFullRequestNoBodyBd(rest,"GET",CkStringBuilder::ckGetAsString(sbPath),imageData)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkJsonObject::ckDispose(jsonToken)
        CkAuthGoogle::ckDispose(gAuth)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbPath)
        CkBinData::ckDispose(imageData)
        ProcedureReturn
    EndIf

    ; 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 CkRest::ckResponseStatusCode(rest) = 404
        Debug "This contact has no photo."
        CkJsonObject::ckDispose(jsonToken)
        CkAuthGoogle::ckDispose(gAuth)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbPath)
        CkBinData::ckDispose(imageData)
        ProcedureReturn
    EndIf

    ; A successful response will have a status code equal to 200.
    If CkRest::ckResponseStatusCode(rest) <> 200
        ; If the response was not successful, then the response body
        ; does not contain image data.  Instead it contains XML.
        sbResponseBody.i = CkStringBuilder::ckCreate()
        If sbResponseBody.i = 0
            Debug "Failed to create object."
            ProcedureReturn
        EndIf

        CkStringBuilder::ckAppendBd(sbResponseBody,imageData,"utf-8",0,0)

        Debug "response status code = " + Str(CkRest::ckResponseStatusCode(rest))
        Debug "response status text = " + CkRest::ckResponseStatusText(rest)
        Debug "response header: " + CkRest::ckResponseHeader(rest)
        Debug "response body: " + CkStringBuilder::ckGetAsString(sbResponseBody)
        Debug "request startline: " + CkRest::ckLastRequestStartLine(rest)
        Debug "request header: " + CkRest::ckLastRequestHeader(rest)
        CkJsonObject::ckDispose(jsonToken)
        CkAuthGoogle::ckDispose(gAuth)
        CkRest::ckDispose(rest)
        CkStringBuilder::ckDispose(sbPath)
        CkBinData::ckDispose(imageData)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    ; Examine the content-type in the response header so we know what file
    ; extension to use (.jpg, .png, etc.)
    sbContentType.i = CkStringBuilder::ckCreate()
    If sbContentType.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbContentType,CkRest::ckResponseHdrByName(rest,"Content-Type"))

    If CkStringBuilder::ckContentsEqual(sbContentType,"image/jpeg",0) = 1
        CkBinData::ckWriteFile(imageData,"qa_output/contact_photo.jpg")
    EndIf

    If CkStringBuilder::ckContentsEqual(sbContentType,"image/png",0) = 1
        CkBinData::ckWriteFile(imageData,"qa_output/contact_photo.png")
    EndIf

    Debug "Content-Type: " + CkStringBuilder::ckGetAsString(sbContentType)
    Debug "Success."


    CkJsonObject::ckDispose(jsonToken)
    CkAuthGoogle::ckDispose(gAuth)
    CkRest::ckDispose(rest)
    CkStringBuilder::ckDispose(sbPath)
    CkBinData::ckDispose(imageData)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkStringBuilder::ckDispose(sbContentType)


    ProcedureReturn
EndProcedure