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(DataFlex) OneDrive -- List Large DirectoryDemonstrates how to get the entire collection of DriveItem children when the collection is large and multiple pages need to be requested. To test this example, I created a DriveItem with 450 children. Note: This example requires Chilkat v9.5.0.68 or greater.
Use ChilkatAx-9.5.0-win32.pkg Procedure Test Handle hoHttp String sResp Integer i Integer iNumItems Handle hoJson Boolean iBGetMore String sNextLink String sTemp1 Integer iTemp1 Boolean bTemp1 // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Get Create (RefClass(cComChilkatHttp)) To hoHttp If (Not(IsComObjectCreated(hoHttp))) Begin Send CreateComObject of hoHttp End // Use your previously obtained access token here: // See the following examples for getting an access token: // Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint). // Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint). // Refresh Access Token (Azure AD v2.0 Endpoint). // Refresh Access Token (Azure AD Endpoint). // (Make sure your token was obtained with the FilesRead or Files.ReadWrite scope.) Set ComAuthToken Of hoHttp To "MICROSOFT_GRAPH_ACCESS_TOKEN" // This example will get the DriveItems in /lots-of-files, which has 450 children.. Get ComSetUrlVar Of hoHttp "item_path" "/lots-of-files" To iSuccess Get Create (RefClass(cComChilkatJsonObject)) To hoJson If (Not(IsComObjectCreated(hoJson))) Begin Send CreateComObject of hoJson End Set ComEmitCompact Of hoJson To False // This loop will download DriveItems in sets of 50 until no more exist. Move True To iBGetMore // (Add the $top query parameter to define the page size, i.e. the max number of results to return). Move "https://graph.microsoft.com/v1.0/me/drive/root:{$item_path}:/children?$top=50" To sNextLink While (iBGetMore = True) // Get the next chunk of DriveItems Get ComQuickGetStr Of hoHttp sNextLink To sResp Get ComLastMethodSuccess Of hoHttp To bTemp1 If (bTemp1 <> True) Begin Get ComLastErrorText Of hoHttp To sTemp1 Showln sTemp1 Procedure_Return End // The response should be JSON. Get ComLoad Of hoJson sResp To iSuccess // A successful response should return a status code of 200. Get ComLastStatus Of hoHttp To iTemp1 If (iTemp1 <> 200) Begin Get ComEmit Of hoJson To sTemp1 Showln sTemp1 Get ComLastStatus Of hoHttp To iTemp1 Showln "Response status = " iTemp1 Procedure_Return End // Iterate over the DriveItems in the JSON response: Move 0 To i Get ComSizeOfArray Of hoJson "value" To iNumItems While (i < iNumItems) Set ComI Of hoJson To i Get ComStringOf Of hoJson "value[i].name" To sTemp1 Showln "name: " sTemp1 Move i + 1 To i Loop // If a nextLink was included in the JSON, use it to get the next set of 50 DriveItems. // Otherwise, exit the loop. Get ComHasMember Of hoJson '"@odata.nextLink"' To bTemp1 If (bTemp1 = True) Begin Get ComStringOf Of hoJson '"@odata.nextLink"' To sNextLink Showln "nextLink: " sNextLink End Else Begin Move False To iBGetMore End Loop End_Procedure |
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