Ararat Synapse http post in delphi
lazarus / 38-Networking and Web Programming

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Woodyka · 2011-05-02 12:41

Dears!

I would like to solve the my problem which is the following:

I have an url: http://example.net/x.html - I have to post there a
variable=value - and the answer is an jpeg image, depending on the
value. I works correctly with wget, but I would like to use the
synapse http units, but I tried, and read about it, but I think my
knowledge is too little for it.

But I can downloaded it the image without post:
  HTTP := THTTPSend.Create;
  try
    HTTP.HTTPMethod('POST', 'http://example.net/x.html');
    Memo1.Lines.Assign(HTTP.Headers);
    Memo2.Lines.LoadFromStream(HTTP.Document);
    http.Document.SaveToFile('c:\file.jpg');
  finally
    HTTP.Free;
  end;

It works. Please help me about it, how can I solve it with the
mentioned post.

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ik · 2011-05-02 16:08

What exactly does not work ?
Do you understand that JPEG is a binary format so you can not display
it on TMemo properly ?

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Woodyka · 2011-05-02 16:12

I mean, about how to send (post) a variable (example: sw) and its
value (test) to an url, and get the answer jpg into a file.

I think about httpposturl function , but I cant use it correctly.

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vvzh · 2011-05-02 18:02

I have not used it myself, but according to documentation you can call
it the following way:
Code: [Select]var
  Response: TMemoryStream;
// ...
Response := TMemoryStream.Create;
try
  HttpPostURL('http://example.net/x.html', 'sw=test', Response);
  Response.SaveToFile('c:\file.jpg');
finally
  Response.Free;
end;

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Woodyka · 2011-05-03 13:11

Cool!

Thank you very much! So simple solution, but it works as well!

Thank you!