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			Function std.net.curl.HTTP.onProgress
			 Register an event handler that gets called to inform of
 upload/download progress.
Prototype
void onProgress( int delegate(ulong, ulong, ulong, ulong) callback ) @property;
Callback parameters
Callback returns
Return 0 to signal success, return non-zero to abort transfer.
Example
import std.net.curl, std.stdio; auto client = HTTP("dlang.org"); client.onProgress = delegate int(size_t dl, size_t dln, size_t ul, size_t ult) { writeln("Progress: downloaded ", dln, " of ", dl); writeln("Progress: uploaded ", uln, " of ", ul); }; client.perform();
Authors
Jonas Drewsen. Some of the SMTP code contributed by Jimmy Cao.