(PureBasic) List Files in Google Drive

Demonstrates how to list files in Google Drive.

See Google Drive Files list for more optional HTTP parameters.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkAuthGoogle.pb"
IncludeFile "CkRest.pb"
IncludeFile "CkJsonObject.pb"

Procedure ChilkatExample()

    success.i = 1

    ; It requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    ; This example uses a previously obtained access token having permission for the 
    ; Google Drive scope.

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

    CkAuthGoogle::setCkAccessToken(gAuth, "GOOGLE-DRIVE-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.googleapis.com",443,1,bAutoReconnect)

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

    ; Get 4 results per page.  (The default page size is 100, with a max of 1000.
    CkRest::ckAddQueryParam(rest,"pageSize","4")

    ; This uses the Google Drive V3 API... (not V2)
    jsonResponse.s = CkRest::ckFullRequestNoBody(rest,"GET","/drive/v3/files")
    If CkRest::ckLastMethodSuccess(rest) <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkAuthGoogle::ckDispose(gAuth)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ; A successful response will have a status code equal to 200.
    If CkRest::ckResponseStatusCode(rest) <> 200
        Debug "request header = " + CkRest::ckLastRequestHeader(rest)
        Debug "response status code = " + Str(CkRest::ckResponseStatusCode(rest))
        Debug "response status text = " + CkRest::ckResponseStatusText(rest)
        Debug "response header: " + CkRest::ckResponseHeader(rest)
        Debug "response JSON: " + jsonResponse
        CkAuthGoogle::ckDispose(gAuth)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

    ; A successful response looks like this:
    ; {
    ;  "kind": "drive#fileList",
    ;  "files": [
    ;    {
    ;      "kind": "drive#file",
    ;      "id": "0B53Q6OSTWYolenpjTEU4ekJlQUU",
    ;      "name": "test",
    ;      "mimeType": "application/vnd.google-apps.folder"
    ;    },
    ;    {
    ;      "kind": "drive#file",
    ;      "id": "0B53Q6OSTWYolRm4ycjZtdXhRaEE",
    ;      "name": "starfish4.jpg",
    ;      "mimeType": "image/jpeg"
    ;    },
    ;    {
    ;      "kind": "drive#file",
    ;      "id": "0B53Q6OSTWYolMWt2VzN0Qlo1UjA",
    ;      "name": "hamlet2.xml",
    ;      "mimeType": "text/xml"
    ;    },
    ; ...
    ;    {
    ;      "kind": "drive#file",
    ;      "id": "0B53Q6OSTWYolc3RhcnRlcl9maWxlX2Rhc2hlclYw",
    ;      "name": "Getting started",
    ;      "mimeType": "application/pdf"
    ;    }
    ;  ]
    ; }

    ; Iterate over each file in the response and show the name, id, and mimeType.
    json.i = CkJsonObject::ckCreate()
    If json.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkJsonObject::ckLoad(json,jsonResponse)

    ; Show the full JSON response.
    CkJsonObject::setCkEmitCompact(json, 0)
    Debug CkJsonObject::ckEmit(json)

    numFiles.i = CkJsonObject::ckSizeOfArray(json,"files")
    i.i = 0
    While i < numFiles
        CkJsonObject::setCkI(json, i)
        Debug "name: " + CkJsonObject::ckStringOf(json,"files[i].name")
        Debug "id: " + CkJsonObject::ckStringOf(json,"files[i].id")
        Debug "mimeType: " + CkJsonObject::ckStringOf(json,"files[i].mimeType")
        Debug "-"
        i = i + 1
    Wend


    CkAuthGoogle::ckDispose(gAuth)
    CkRest::ckDispose(rest)
    CkJsonObject::ckDispose(json)


    ProcedureReturn
EndProcedure