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DataFlex Examples

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(DataFlex) Google Cloud Storage List Bucket Objects

See more Google Cloud Storage Examples

List the objects in a Google Cloud Storage bucket.

For more information, see https://cloud.google.com/storage/docs/json_api/v1/objects/list

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoSbToken
    Boolean iSuccess
    Handle hoHttp
    Boolean iSuccess
    Variant vResp
    Handle hoResp
    Integer iResponseCode
    Handle hoJson
    String sId
    String sSelfLink
    String sMediaLink
    String sName
    String sBucket
    String sGeneration
    String sMetageneration
    String sContentType
    String sStorageClass
    String sSize
    String sMd5Hash
    String sCrc32c
    String sEtag
    String sTimeCreated
    String sUpdated
    String sTimeStorageClassUpdated
    String sKind
    Integer i
    Integer iCount_i
    String sTemp1
    Boolean bTemp1

    // This example 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 
    // scope "https://www.googleapis.com/auth/cloud-platform"

    // In this example, Get Google Cloud Storage OAuth2 Access Token, 
    // the service account access token was saved to a text file.  This example fetches the access token from the file..
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbToken
    If (Not(IsComObjectCreated(hoSbToken))) Begin
        Send CreateComObject of hoSbToken
    End
    Get ComLoadFile Of hoSbToken "qa_data/tokens/googleCloudStorageAccessToken.txt" "utf-8" To iSuccess

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Get ComGetAsString Of hoSbToken To sTemp1
    Set ComAuthToken Of hoHttp To sTemp1

    // For more info see Cloud Storage Documentation - Objects: list 
    // 
    Get ComSetUrlVar Of hoHttp "bucket" "chilkat-ocean" To iSuccess
    Get ComSetUrlVar Of hoHttp "PROJECT_NAME" "ChilkatCloud" To iSuccess

    Get ComQuickGetObj Of hoHttp "https://www.googleapis.com/storage/v1/b/{$bucket}/o?project={$ChilkatCloud}" To vResp
    If (IsComObject(vResp)) Begin
        Get Create (RefClass(cComChilkatHttpResponse)) To hoResp
        Set pvComObject Of hoResp To vResp
    End
    Get ComLastMethodSuccess Of hoHttp To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStatusCode Of hoResp To iResponseCode
    If (iResponseCode = 401) Begin
        Get ComBodyStr Of hoResp To sTemp1
        Showln sTemp1
        Showln "If invalid credentials, then it is likely the access token expired."
        Showln "Your app should automatically fetch a new access token and re-try."
        Send Destroy of hoResp
        Procedure_Return
    End

    Showln "Response code: " iResponseCode
    Showln "Response body"

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComBodyStr Of hoResp To sTemp1
    Get ComLoad Of hoJson sTemp1 To iSuccess
    Send Destroy of hoResp

    Set ComEmitCompact Of hoJson To False

    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    // A response code = 200 indicates success, and the response body contains JSON such as this:

    // {
    //   "kind": "storage#objects",
    //   "items": [
    //     {
    //       "kind": "storage#object",
    //       "id": "chilkat-ocean/file with space char.jpg/1555776690752366",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg",
    //       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg?generation=1555776690752366&alt=media",
    //       "name": "file with space char.jpg",
    //       "bucket": "chilkat-ocean",
    //       "generation": "1555776690752366",
    //       "metageneration": "1",
    //       "contentType": "image/jpeg",
    //       "storageClass": "MULTI_REGIONAL",
    //       "size": "6229",
    //       "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
    //       "crc32c": "9RjgwQ==",
    //       "etag": "CO6WguiH3+ECEAE=",
    //       "timeCreated": "2019-04-20T16:11:30.752Z",
    //       "updated": "2019-04-20T16:11:30.752Z",
    //       "timeStorageClassUpdated": "2019-04-20T16:11:30.752Z"
    //     },
    //     {
    //       "kind": "storage#object",
    // 
    //       "id": "chilkat-ocean/penguins.jpg/1555775749593296",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
    //       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1555775749593296&alt=media",
    //       "name": "penguins.jpg",
    //       "bucket": "chilkat-ocean",
    //       "generation": "1555775749593296",
    //       "metageneration": "1",
    //       "contentType": "image/jpeg",
    //       "storageClass": "MULTI_REGIONAL",
    //       "size": "777835",
    //       "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
    //       "crc32c": "ixxYVw==",
    //       "etag": "CNCxnqeE3+ECEAE=",
    //       "timeCreated": "2019-04-20T15:55:49.593Z",
    //       "updated": "2019-04-20T15:55:49.593Z",
    //       "timeStorageClassUpdated": "2019-04-20T15:55:49.593Z"
    //     },
    //     {
    //       "kind": "storage#object",
    //       "id": "chilkat-ocean/starfish.jpg/1628958192639968",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
    //       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1628958192639968&alt=media",
    //       "name": "starfish.jpg",
    //       "bucket": "chilkat-ocean",
    //       "generation": "1628958192639968",
    //       "metageneration": "1",
    //       "contentType": "image/jpeg",
    //       "storageClass": "MULTI_REGIONAL",
    //       "size": "6229",
    //       "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
    //       "crc32c": "9RjgwQ==",
    //       "etag": "COC/tJP2sPICEAE=",
    //       "timeCreated": "2021-08-14T16:23:12.660Z",
    //       "updated": "2021-08-14T16:23:12.660Z",
    //       "timeStorageClassUpdated": "2021-08-14T16:23:12.660Z"
    //     }
    //   ]
    // }

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

    Get ComStringOf Of hoJson "kind" To sKind
    Move 0 To i
    Get ComSizeOfArray Of hoJson "items" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "items[i].kind" To sKind
        Get ComStringOf Of hoJson "items[i].id" To sId
        Get ComStringOf Of hoJson "items[i].selfLink" To sSelfLink
        Get ComStringOf Of hoJson "items[i].mediaLink" To sMediaLink
        Get ComStringOf Of hoJson "items[i].name" To sName
        Get ComStringOf Of hoJson "items[i].bucket" To sBucket
        Get ComStringOf Of hoJson "items[i].generation" To sGeneration
        Get ComStringOf Of hoJson "items[i].metageneration" To sMetageneration
        Get ComStringOf Of hoJson "items[i].contentType" To sContentType
        Get ComStringOf Of hoJson "items[i].storageClass" To sStorageClass
        Get ComStringOf Of hoJson "items[i].size" To sSize
        Get ComStringOf Of hoJson "items[i].md5Hash" To sMd5Hash
        Get ComStringOf Of hoJson "items[i].crc32c" To sCrc32c
        Get ComStringOf Of hoJson "items[i].etag" To sEtag
        Get ComStringOf Of hoJson "items[i].timeCreated" To sTimeCreated
        Get ComStringOf Of hoJson "items[i].updated" To sUpdated
        Get ComStringOf Of hoJson "items[i].timeStorageClassUpdated" To sTimeStorageClassUpdated
        Move (i + 1) To i
    Loop



End_Procedure

 

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