Pascal (Lazarus/Delphi)
Pascal (Lazarus/Delphi)
Azure Storage: List Blobs
See more Azure Cloud Storage Examples
Azure Storage Blob Service REST API: Sample code to fetch the list of blobs in the specified container.Chilkat Pascal (Lazarus/Delphi) Downloads
program ChilkatDemo;
// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
SysUtils,
CkDllLoader,
Chilkat.DtObj,
Chilkat.Rest,
Chilkat.AuthAzureStorage,
Chilkat.Xml,
Chilkat.CkDateTime;
// ---------------------------------------------------------------------------
procedure RunDemo;
var
success: Boolean;
rest: TRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
azAuth: TAuthAzureStorage;
responseStr: string;
xml: TXml;
lastMod: TCkDateTime;
numBlobs: Integer;
i: Integer;
dt: TDtObj;
lastModStr: string;
begin
success := False;
// Azure Blob Service Example: List the blobs in a specified container.
// See also: https://msdn.microsoft.com/en-us/library/azure/dd135734.aspx
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
rest := TRest.Create;
// Connect to the Azure Storage Blob Service
bTls := True;
port := 443;
bAutoReconnect := True;
// In this example, the storage account name is "chilkat".
success := rest.Connect('chilkat.blob.core.windows.net',port,bTls,bAutoReconnect);
if (success = False) then
begin
WriteLn(rest.LastErrorText);
Exit;
end;
// Provide Azure Cloud credentials for the REST call.
azAuth := TAuthAzureStorage.Create;
azAuth.AccessKey := 'AZURE_ACCESS_KEY';
// The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.Account := 'chilkat';
azAuth.Scheme := 'SharedKey';
azAuth.Service := 'Blob';
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
azAuth.XMsVersion := '2021-08-06';
success := rest.SetAuthAzureStorage(azAuth);
// Note: The application does not need to explicitly set the following
// headers: x-ms-date, Authorization. These headers
// are automatically set by Chilkat.
// The expected success response is a 200 response status code with an XML response body.
// In this example, we are listing the blobs in the container named "mycontainer".
responseStr := rest.FullRequestNoBody('GET','/mycontainer?restype=container&comp=list');
if (rest.LastMethodSuccess = False) then
begin
WriteLn(rest.LastErrorText);
Exit;
end;
// When successful, the Azure Storage service will respond with a 200 response status code,
// with an XML response body.
if (rest.ResponseStatusCode <> 200) then
begin
// Examine the request/response to see what happened.
WriteLn('response status code = ' + rest.ResponseStatusCode);
WriteLn('response status text = ' + rest.ResponseStatusText);
WriteLn('response header: ' + rest.ResponseHeader);
WriteLn('response body (if any): ' + responseStr);
WriteLn('---');
WriteLn('LastRequestStartLine: ' + rest.LastRequestStartLine);
WriteLn('LastRequestHeader: ' + rest.LastRequestHeader);
Exit;
end;
// Load the XML response for parsing.
// An example of the response XML is shown below.
xml := TXml.Create;
success := xml.LoadXml(responseStr);
WriteLn(xml.GetXml());
// Let's iterate over the blobs...
lastMod := TCkDateTime.Create;
numBlobs := xml.NumChildrenAt('Blobs');
i := 0;
dt := TDtObj.Create;
while i < numBlobs do
begin
WriteLn('---- Blob ' + i + ' ----');
xml.I := i;
WriteLn('Name: ' + xml.GetChildContent('Blobs|Blob[i]|Name'));
WriteLn('Content-Length: ' + xml.GetChildContent('Blobs|Blob[i]|Properties|Content-Length'));
WriteLn('Content-Type: ' + xml.GetChildContent('Blobs|Blob[i]|Properties|Content-Type'));
WriteLn('Content-MD5: ' + xml.GetChildContent('Blobs|Blob[i]|Properties|Content-MD5'));
WriteLn('BlobType: ' + xml.GetChildContent('Blobs|Blob[i]|Properties|BlobType'));
WriteLn('LeaseStatus: ' + xml.GetChildContent('Blobs|Blob[i]|Properties|LeaseStatus'));
lastMod.SetFromRfc822(xml.GetChildContent('Blobs|Blob[i]|Properties|Last-Modified'));
lastMod.ToDtObj(True,dt);
WriteLn('Last-Modified YMD: ' + dt.Year + ',' + dt.Month + ',' + dt.Day);
i := i + 1;
end;
WriteLn('-------------------------');
// Use the ChilkatPath method to get information for a specific blob:
// For example, let's say we want the Last-Modified date/time for
// the blob named "helloWorld.txt"
lastModStr := xml.ChilkatPath('/C/Name,helloWorld.txt|..|Properties|Last-Modified|*');
WriteLn('helloWorld.txt Last-Modified: ' + lastModStr);
WriteLn('Success.');
// <?xml version="1.0" encoding="utf-8" ?>
// <EnumerationResults ServiceEndpoint="https://chilkat.blob.core.windows.net/" ContainerName="test">
// <Blobs>
// <Blob>
// <Name>hamletC.xml</Name>
// <Properties>
// <Last-Modified>Mon, 02 May 2016 23:50:30 GMT</Last-Modified>
// <Etag>0x8D372E48B6D323A</Etag>
// <Content-Length>279658</Content-Length>
// <Content-Type>application/octet-stream</Content-Type>
// <Content-Encoding />
// <Content-Language />
// <Content-MD5>4E6prI9haw81xadSLeEj3Q==</Content-MD5>
// <Cache-Control />
// <Content-Disposition>attachment; filename="hamletC.xml"</Content-Disposition>
// <BlobType>BlockBlob</BlobType>
// <LeaseStatus>unlocked</LeaseStatus>
// <LeaseState>available</LeaseState>
// </Properties>
// </Blob>
// <Blob>
// <Name>helloWorld.txt</Name>
// <Properties>
// <Last-Modified>Mon, 02 May 2016 15:21:55 GMT</Last-Modified>
// <Etag>0x8D3729D7EE38299</Etag>
// <Content-Length>12</Content-Length>
// <Content-Type>application/octet-stream</Content-Type>
// <Content-Encoding />
// <Content-Language />
// <Content-MD5>7Qdih1MuhjZehB6Sv8UNjA==</Content-MD5>
// <Cache-Control />
// <Content-Disposition>attachment; filename="helloWorld.txt"</Content-Disposition>
// <BlobType>BlockBlob</BlobType>
// <LeaseStatus>unlocked</LeaseStatus>
// <LeaseState>available</LeaseState>
// </Properties>
// </Blob>
// <Blob>
// <Name>thisIsATest.txt</Name>
// <Properties>
// <Last-Modified>Tue, 03 May 2016 00:22:13 GMT</Last-Modified>
// <Etag>0x8D372E8F9B2A62E</Etag>
// <Content-Length>1600</Content-Length>
// <Content-Type>application/octet-stream</Content-Type>
// <Content-Encoding />
// <Content-Language />
// <Content-MD5>FhgUXYfePg2ItsraPmz0Xg==</Content-MD5>
// <Cache-Control />
// <Content-Disposition>attachment; filename="thisIsATest.txt"</Content-Disposition>
// <BlobType>BlockBlob</BlobType>
// <LeaseStatus>unlocked</LeaseStatus>
// <LeaseState>available</LeaseState>
// </Properties>
// </Blob>
// </Blobs>
// <NextMarker />
// </EnumerationResults>
//
rest.Free;
azAuth.Free;
xml.Free;
lastMod.Free;
dt.Free;
end;
// ---------------------------------------------------------------------------
begin
try
RunDemo;
except
on E: Exception do
WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
end;
WriteLn;
{$IFDEF MSWINDOWS}
WriteLn('Press Enter to exit...');
ReadLn;
{$ENDIF}
end.