Pascal (Lazarus/Delphi)

Create a Temporary Public Link to a DropBox File

See more Dropbox Examples

Get a temporary link to stream content of a file. This link will expire in four hours and afterwards you will get 410 Gone. 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.Http,
  Chilkat.StringBuilder,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  json: TJsonObject;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  template_id: string;
  j: Integer;
  count_j: Integer;
  name: string;
  value: string;
  metadataName: string;
  metadataId: string;
  metadataClient_modified: string;
  metadataServer_modified: string;
  metadataRev: string;
  metadataSize: Integer;
  metadataPath_lower: string;
  metadataPath_display: string;
  metadataSharing_infoRead_only: Boolean;
  metadataSharing_infoParent_shared_folder_id: string;
  metadataSharing_infoModified_by: string;
  metadataIs_downloadable: Boolean;
  metadataHas_explicit_shared_members: Boolean;
  metadataContent_hash: string;
  link: string;
  i: Integer;
  count_i: Integer;

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 -X POST https://api.dropboxapi.com/2/files/get_temporary_link \
  //      --header "Authorization: Bearer DROPBOX_ACCESS_TOKEN" \
  //      --header "Content-Type: application/json" \
  //      --data "{\"path\": \"/video.mp4\"}"

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

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

  //  {
  //    "path": "/video.mp4"
  //  }

  json := TJsonObject.Create;
  json.UpdateString('path','/video.mp4');

  http.SetRequestHeader('Authorization','Bearer DROPBOX_ACCESS_TOKEN');

  resp := THttpResponse.Create;
  success := http.HttpJson('POST','https://api.dropboxapi.com/2/files/get_temporary_link',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;

  //  Sample JSON response:
  //  (Sample code for parsing the JSON response is shown below)

  //  {
  //    "metadata": {
  //      "name": "Prime_Numbers.txt",
  //      "id": "id:a4ayc_80_OEAAAAAAAAAXw",
  //      "client_modified": "2015-05-12T15:50:38Z",
  //      "server_modified": "2015-05-12T15:50:38Z",
  //      "rev": "a1c10ce0dd78",
  //      "size": 7212,
  //      "path_lower": "/homework/math/prime_numbers.txt",
  //      "path_display": "/Homework/math/Prime_Numbers.txt",
  //      "sharing_info": {
  //        "read_only": true,
  //        "parent_shared_folder_id": "84528192421",
  //        "modified_by": "dbid:AAH4f99T0taONIb-OurWxbNQ6ywGRopQngc"
  //      },
  //      "is_downloadable": true,
  //      "property_groups": [
  //        {
  //          "template_id": "ptid:1a5n2i6d3OYEAAAAAAAAAYa",
  //          "fields": [
  //            {
  //              "name": "Security Policy",
  //              "value": "Confidential"
  //            }
  //          ]
  //        }
  //      ],
  //      "has_explicit_shared_members": false,
  //      "content_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
  //    },
  //    "link": "https://dl.dropboxusercontent.com/apitl/1/YXNkZmFzZGcyMzQyMzI0NjU2NDU2NDU2"
  //  }

  //  Sample code for parsing the JSON response...
  //  Use the following online tool to generate parsing code from sample JSON:
  //  Generate Parsing Code from JSON

  metadataName := jResp.StringOf('metadata.name');
  metadataId := jResp.StringOf('metadata.id');
  metadataClient_modified := jResp.StringOf('metadata.client_modified');
  metadataServer_modified := jResp.StringOf('metadata.server_modified');
  metadataRev := jResp.StringOf('metadata.rev');
  metadataSize := jResp.IntOf('metadata.size');
  metadataPath_lower := jResp.StringOf('metadata.path_lower');
  metadataPath_display := jResp.StringOf('metadata.path_display');
  metadataSharing_infoRead_only := jResp.BoolOf('metadata.sharing_info.read_only');
  metadataSharing_infoParent_shared_folder_id := jResp.StringOf('metadata.sharing_info.parent_shared_folder_id');
  metadataSharing_infoModified_by := jResp.StringOf('metadata.sharing_info.modified_by');
  metadataIs_downloadable := jResp.BoolOf('metadata.is_downloadable');
  metadataHas_explicit_shared_members := jResp.BoolOf('metadata.has_explicit_shared_members');
  metadataContent_hash := jResp.StringOf('metadata.content_hash');
  link := jResp.StringOf('link');
  i := 0;
  count_i := jResp.SizeOfArray('metadata.property_groups');
  while i < count_i do
    begin
      jResp.I := i;
      template_id := jResp.StringOf('metadata.property_groups[i].template_id');
      j := 0;
      count_j := jResp.SizeOfArray('metadata.property_groups[i].fields');
      while j < count_j do
        begin
          jResp.J := j;
          name := jResp.StringOf('metadata.property_groups[i].fields[j].name');
          value := jResp.StringOf('metadata.property_groups[i].fields[j].value');
          j := j + 1;
        end;

      i := i + 1;
    end;



  http.Free;
  json.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.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.