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lualua-patterns

Lua remove folders in file path from request uri

I have URL's like this:

/path1/path2/path3/path4/path5/96_6.txt
/path1/path2/path3/path4/path5/96_7.txt?blah=1

So far I am doing the following to obtain the file on the end of my URL:

local request_uri = "/path1/path2/path3/path4/path5/96_645.txt?lol=1"
local name = request_uri:match( "([^/]+)$" )
local filename = string.gsub(name, "?.*", "")


print(name)
print(filename)

What outputs:

96_645.txt?lol=1
96_645.txt

What I want to do is to remove path2 and path3 from my URL. The issue is they are dynamic folder paths and can contain characters.

What is the best solution for this?

Solution

  • Try this one:

    function fix_url(p)
  p, _ = string.gsub(p, '^/([^/]+)/[^/]+/[^/]+/(.*)', '/%1/%2')
  return p
end

    Here are some tests:

    p = fix_url('/path1/path2/path3/path4/path5/96_6.txt') 
assert(p == '/path1/path4/path5/96_6.txt')
p = fix_url('/path1/path2/path3/path4/path5/96_7.txt?blah=1') 
assert(p == '/path1/path4/path5/96_7.txt?blah=1')
p = fix_url('/path1/foo.txt') 
assert(p == '/path1/foo.txt')