Pascal (Lazarus/Delphi)

Frame.io - Upload an Asset

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Upload an asset to Frame.io Pascal (Lazarus/Delphi)

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.FileAccess,
  Chilkat.HttpResponse,
  Chilkat.StringBuilder,
  Chilkat.JsonObject,
  Chilkat.Http,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  localFilePath: string;
  fac: TFileAccess;
  fileSize: Integer;
  json: TJsonObject;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  numChunks: Integer;
  sizePerChunk: Integer;
  bd: TBinData;
  httpForUpload: THttp;
  i: Integer;
  uploadUrl: string;

begin
  success := False;

  //  This example assumes the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl --request POST \
  //    --url https://api.frame.io/v2/assets/<ASSET_ID>/children \
  //    --header 'authorization: Bearer <FRAME_IO_DEV_TOKEN>' \
  //    --header 'content-type: application/json' \
  //    --data '{"filesize":1570024 ,"filetype":"video/mp4","name":"rotating_earth","type":"file"}'

  //  Use the following online tool to generate HTTP code from a CURL command
  //  Convert a cURL Command to HTTP Source Code

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

  //  The following JSON is sent in the request body.

  //  {
  //    "filesize": 1570024,
  //    "filetype": "video/mp4",
  //    "name": "rotating_earth",
  //    "type": "file"
  //  }

  localFilePath := 'qa_data/mp4/rotating_earth.mp4';
  fac := TFileAccess.Create;
  fileSize := fac.FileSize(localFilePath);

  json := TJsonObject.Create;
  json.UpdateInt('filesize',fileSize);
  json.UpdateString('filetype','video/mp4');
  json.UpdateString('name','rotating_earth7');
  json.UpdateString('type','file');

  http.SetRequestHeader('content-type','application/json');
  //  Adds the "Authorization: Bearer <FRAME_IO_DEV_TOKEN>" header.
  http.AuthToken := '<FRAME_IO_DEV_TOKEN>';

  //  Uploading to asset ID: 039845e8-bffe-4d6b-88d3-c780bae06342
  resp := THttpResponse.Create;
  success := http.HttpJson('POST','https://api.frame.io/v2/assets/039845e8-bffe-4d6b-88d3-c780bae06342/children',json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Upload in chunks to the pre-signed S3 upload URLs.
  //  There are ways to do this in parallel, but for simplicity we'll show how to upload
  //  one chunk after another.
  numChunks := jResp.SizeOfArray('upload_urls');
  sizePerChunk := (fileSize + numChunks - 1) / numChunks;

  WriteLn('numChunks = ' + numChunks);
  WriteLn('sizePerChunk = ' + sizePerChunk);

  success := fac.OpenForRead(localFilePath);
  if (success = False) then
    begin
      WriteLn(fac.LastErrorText);
      Exit;
    end;

  bd := TBinData.Create;
  httpForUpload := THttp.Create;

  httpForUpload.SetRequestHeader('x-amz-acl','private');

  i := 0;
  while (i < numChunks) do
    begin
      bd.Clear();
      success := fac.ReadBlockBd(i,sizePerChunk,bd);

      jResp.I := i;
      uploadUrl := jResp.StringOf('upload_urls[i]');

      //  Send the chunk in a PUT:

      WriteLn('PUT chunk ' + i + 1);
      WriteLn('URL: ' + uploadUrl);

      //  PUT https://frameio-uploads-production.s3/etc/etc
      //  Content-Type: video/mp4
      //  x-amz-acl: private
      success := httpForUpload.HttpBd('PUT',uploadUrl,bd,'video/mp4',resp);
      if (success = False) then
        begin
          WriteLn(httpForUpload.LastErrorText);
          Exit;
        end;

      WriteLn('response status: ' + resp.StatusCode);

      i := i + 1;
    end;

  fac.FileClose();

  WriteLn('File uploaded.');


  http.Free;
  fac.Free;
  json.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.Free;
  bd.Free;
  httpForUpload.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.