Delphi DLL Stripe: Create a File Upload

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Uploads a file to Stripe.

Documentation: https://stripe.com/docs/api/curl#create_file_upload

CURL Command

curl https://files.stripe.com/v1/files \
   -u STRIPE_SECRET_KEY: \
   -F purpose=dispute_evidence \
   -F file="@/path/to/a/file.jpg"

Delphi DLL Example

var
rest: HCkRest;
success: Boolean;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
fileStream2: HCkStream;
strResponseBody: PWideChar;
jsonResponse: HCkJsonObject;
id: PWideChar;
object: PWideChar;
created: Integer;
filename: PWideChar;
purpose: PWideChar;
size: Integer;
type: PWideChar;
url: PWideChar;

begin
rest := CkRest_Create();

//  URL: https://files.stripe.com/v1/files
bTls := True;
port := 443;
bAutoReconnect := True;
success := CkRest_Connect(rest,'files.stripe.com',port,bTls,bAutoReconnect);
if (success <> True) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(CkRest_getConnectFailReason(rest)));
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

CkRest_SetAuthBasic(rest,'STRIPE_SECRET_KEY','');

CkRest_putPartSelector(rest,'1');
CkRest_AddHeader(rest,'Content-Disposition','form-data; name="purpose"');
CkRest_SetMultipartBodyString(rest,'dispute_evidence');

CkRest_putPartSelector(rest,'2');
fileStream2 := CkStream_Create();
CkStream_putSourceFile(fileStream2,'/path/to/a/file.jpg');
CkRest_AddHeader(rest,'Content-Disposition','form-data; name="/path/to/a/file.jpg"; filename="/path/to/a/file.jpg"');
CkRest_AddHeader(rest,'Content-Type','image/jpeg');
CkRest_SetMultipartBodyStream(rest,fileStream2);

CkRest_putPartSelector(rest,'0');

CkRest_AddHeader(rest,'Expect','100-continue');

strResponseBody := CkRest__fullRequestMultipart(rest,'POST','/v1/files');
if (CkRest_getLastMethodSuccess(rest) <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

jsonResponse := CkJsonObject_Create();
CkJsonObject_Load(jsonResponse,strResponseBody);

id := CkJsonObject__stringOf(jsonResponse,'id');
object := CkJsonObject__stringOf(jsonResponse,'object');
created := CkJsonObject_IntOf(jsonResponse,'created');
filename := CkJsonObject__stringOf(jsonResponse,'filename');
purpose := CkJsonObject__stringOf(jsonResponse,'purpose');
size := CkJsonObject_IntOf(jsonResponse,'size');
type := CkJsonObject__stringOf(jsonResponse,'type');
url := CkJsonObject__stringOf(jsonResponse,'url');

CkRest_Dispose(rest);
CkStream_Dispose(fileStream2);
CkJsonObject_Dispose(jsonResponse);

Sample JSON Response Body

{
  "id": "file_1BnEEuGswQrCoh0XqB3XkqAg",
  "object": "file_upload",
  "created": 1516661888,
  "filename": "path",
  "purpose": "sigma_scheduled_query",
  "size": 500,
  "type": "csv",
  "url": "https://stripe-upload-api.s3.amazonaws.com/uploads/file_1BnEEuGswQrCoh0XqB3XkqAg?AWSAccessKeyId=KEY_ID\u0026Expires=TIMESTAMP\u0026Signature=SIGNATURE"
}