In traffic i can find the http header, for example:
urn:sha1:L2YOQAWC3EHJR3MAN2LFJ3ZGFD37YG4J HTTP/1.1
Host:
User-Agent: BearShare 5.1.0b25
Range: bytes=0-117
X-Gnutella-Content-URN: urn:sha1:L2YOQAWC3EHJR3MAN2LFJ3ZGFD37YG4J
X-Connection-Type: Broadband
FP-1a: 128,WЯhІЪ/!ь—VCЂгОµZ›VZу”ЋC$~kћЪX„Яx!¬
FP-Auth-Challenge: R4K7I3Z3YCMFFWNCIRFBDGUDG6PYMSBK
Content-Disposition: inline; filename="readme.txt"
X-Features: browse/1.0, queue/0.1, fwalt/0.1, fwt/0.1
X-Queue: 0.1

but i can't find file after it? may be it is encoded, or archived?