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.