the http command to get a image preview is of the form-
http://localhost:8080/catws/Images/000_001.jpg
in this case
000 is the folder
001 is the file.
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so the general form of the command is.
http://x.x.x.x:8080/catws/Images/fff_ggg.jpg
x.x.x.x is address of computer.
will get folder fff
file ggg
as a jpg preview.