CODEWITHSUNDEEP
delphiindy
Ricardo Acras
Ricardo Acras

Reputation: 36244

TidHTTPClient raising Timeout Exception on code 304

I am writing an hybrid (web/desktop) software and it happens to be loaded of synchronizations between the two modules.

I am trying to use as much HTTP Codes as possible in the communication between them.

In the server side I have Rails 3 and Ruby 1.9 (if that matters for this question). In the desktop side I am using Delphi 7 and Indy 9.0.50.

When I try to get updated data and there is nothing new in the server side, my server API returns code 304 (not modified) wich I understand as being the most apropriate code in this case. But the indy component (TidHTTPClient) raises a Timeout Exception (specificaly EIdReadTimeout). And it actually "waits" for a few seconds, causing a delay I am not comfortable with.

Is this behaviour ok? Am I using an unapropriate HTTP code? Is there a way to avoid the component from waiting for data once it will never come for sure?

Upvotes: 2

Views: 743

Answers (1)

Remy Lebeau
Remy Lebeau

Reputation: 596226

TIdHTTP in Indy 9 does not support conditional GET requests. TIdHTTP in Indy 10 does, and some of the overloaded versions of Get() have a new AIgnoreReplies parameter that you can pass 304 to if EIdHTTPProtocolException exceptions are being raised.

Upvotes: 6

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