how to upload file to dropbox via Delphi 7?

问题

I try to upload file into dropbox.
I use dropbox api https://www.dropbox.com/developers/reference/api#files-POST

procedure TDropbox.Upload2;
const
  URL = 'https://api-content.dropbox.com/1/files/dropbox/';
var
  Response: String;
  Params: TIdMultipartFormDataStream;
  https: TIdHTTP;
  SslIoHandler: TIdSSLIOHandlerSocket;
begin
  https := TIdHTTP.Create(nil);
  Params := TIdMultipartFormDataStream.Create();
  try
    SslIoHandler := TIdSSLIOHandlerSocket.Create(https);
    SslIoHandler.SSLOptions.Method := sslvTLSv1;
    SslIoHandler.SSLOptions.Mode := sslmUnassigned;

    https.IOHandler := SslIoHandler;

    Params.AddFormField('oauth_signature_method', 'PLAINTEXT');
    Params.AddFormField('oauth_consumer_key', FAppKey);
    Params.AddFormField('oauth_token', FOAuth.AccessToken);
    Params.AddFormField('oauth_signature', FAppSecret + '&' + FOAuth.AccessTokenSecret);

    Params.AddFile('file', 'C:\test.txt', 'application/octet-stream');

    https.Post(URL + 'test.txt', Params);
  finally
    FreeAndNil(https);
    FreeAndNil(Params);
  end;
end;

I got "400 Bad request".
All tokens are correct (other api works well).
How pass parameters for this api?

回答1:

Try this instead:

procedure TDropbox.Upload(const AFileName: String);
const
  API_URL = 'https://api-content.dropbox.com/1/files_put/sandbox/';
var
  URL: String;
  https: TIdHTTP;
  SslIoHandler: TIdSSLIOHandlerSocket;
begin
  URL := API_URL+ExtractFileName(AFileName)
    + '?oauth_signature_method=PLAINTEXT&oauth_consumer_key=' + FAppKey
    + '&oauth_token=' + FOAuth.AccessToken
    + '&oauth_signature=' + FAppSecret + '%26' + FOAuth.AccessTokenSecret;

  https := TIdHTTP.Create(nil);
  try
    SslIoHandler := TIdSSLIOHandlerSocket.Create(https);
    SslIoHandler.SSLOptions.Method := sslvTLSv1;
    SslIoHandler.SSLOptions.Mode := sslmUnassigned;

    https.IOHandler := SslIoHandler;
    https.Post(URL, AFileName);
  finally
    FreeAndNil(https);
  end;
end;

回答2:

Use %26 instead & in oauth_signature parameter. There is two values in one parameter concated by & symbol.

Pass file via TMemoryStream.

procedure TDropbox.Upload(const AFileName: String);
const
  API_URL = 'https://api-content.dropbox.com/1/files_put/sandbox/';
var
  URL: String;
  Stream: TMemoryStream;
  ShortFileName: String;
  https: TIdHTTP;
  SslIoHandler: TIdSSLIOHandlerSocket;
begin
  if not FileExists(AFileName) then
  begin
    raise EInOutError.CreateFmt('File %s not found', [AFileName]);
  end;

  ShortFileName := ExtractFileName(AFileName);
  URL := API_URL+ShortFileName
    + '?oauth_signature_method=PLAINTEXT&oauth_consumer_key=' + FAppKey
    + '&oauth_token=' + FOAuth.AccessToken
    + '&oauth_signature=' + FAppSecret + '%26' + FOAuth.AccessTokenSecret;

  https := TIdHTTP.Create(nil);
  Stream := TMemoryStream.Create;
  try
    SslIoHandler := TIdSSLIOHandlerSocket.Create(https);
    SslIoHandler.SSLOptions.Method := sslvTLSv1;
    SslIoHandler.SSLOptions.Mode := sslmUnassigned;

    https.IOHandler := SslIoHandler;
    Stream.LoadFromFile(AFileName);

    https.Post(URL, Stream);
  finally
    FreeAndNil(Stream);
    FreeAndNil(https);
  end;
end;

来源：https://stackoverflow.com/questions/14579998/how-to-upload-file-to-dropbox-via-delphi-7

标签

Delphi

oauth

dropbox

indy-9