Sending @reply in curl

I'm writing an identi.ca client, and seems that @reply isn't working.

After investigation I found that @ prefix is used by curl to indicate file upload, and escaping with \@reply doesn't work; curl doesn't remove the \ at the front.

I also can't format the postfield开发者_如何学Cs to query string, as I need to send files on that request too.

Is there any method to send both @reply and file upload in the same request?

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Use %40 instead of @

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I tried \@ or urlencode("@reply") but it doesn't seems to work.

Finally, I found that adding a space into the front of the message works. status.net also chop extra space off automatically.