Indy. Error posting String with %

3
votes

I am using Indy 9.00.10 under Delphi 7.

I use TIdMultiPartFormDataStream to post some data using TIdHTTP. When I try to post some param with a text value including % in it, for instance '100% brand' it raises "No Argument for format %".

It seems to me that it is calling some format function to the value I am trying to post and it expects every % to be a placeholder, wich is not my case.

Is this a known issue? Is there a workaround for it?

1
delphidelphi-7indy

1 Answers

6
votes

You are using a very old version of Indy. The last release of Indy 9 was 9.0.50, which is available in Indy's SVN. This issue was fixed in 9.0.13.

If you do not want to upgrade, then a workaround is to double up any '%' characters in your field data so they get formatted as a single '%' character, eg:

Stream.AddFormField('FieldName', StringReplace(FieldValue, '%', '%%', [rfReplaceAll]));