[SOLVED] rest idhttp and json raw

[superc]

Hello,

from postman I use an API rest passing parameter in json raw mode with no problem; in my program I use method POST with no problem passing parameter in a TStringList,
but how do i pass the parameters in GET?

Thanks in advance

[Remy Lebeau]

but how do i pass the parameters in GET?

A GET request doesn't have any input parameters in its body, only URL query parameters.

A JSON document needs to be sent using a POST or PUT request instead (depending on API).  However, TStringList is the wrong way to send JSON data, use a TStream instead, such as TStringStream.

[superc]

I saw this post where the tstringlist is used

https://stackoverflow.com/questions/19892471/idhttp-indy-post-do-request-parameters-with-utf-8

I use POST with Tstringlist in 'x-www-form-urlencoded' request

[Remy Lebeau]

I saw this post where the tstringlist is used
...
I use POST with Tstringlist in 'x-www-form-urlencoded' request

That example is not posting JSON data, though.  It is posting 'name=value' pairs in 'x-www-form-urlencoded' format.  The TStrings overload of TIdHTTP.Post() is designed for that format.  But, you cannot post JSON data in that format.  You must send the raw JSON bytes using a TStream, and you must set the Request.ContentType to a suitable JSON media type.  For example:

Code: Pascal  [Select][+][-]

1. var
2.   PostData: TStringStream;
3. begin
4.   PostData := TStringStream.Create('{"json":"here"}', TEncoding.UTF8);
5.   try
6.     IdHTTP1.Request.ContentType := 'application/json';
7.     IdHTTP1.Post(url, PostData);
8.   finally
9.     PostData.Free;
10.   end;
11. end;
12.  

[superc]

Now everything is clear, thank you again