112 lines
2.9 KiB
Lua
112 lines
2.9 KiB
Lua
local fs = require "filesystem"
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local fsproxy = {}
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local fsfunc = {}
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local function sanitisePath(path)
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local pt = {}
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for s in path:gmatch("([^/]+)") do
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if s == ".." then
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pt[#pt] = nil
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elseif s == "." then
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else
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pt[#pt+1] = s
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end
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end
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return table.concat(pt,"/")
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end
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function fsproxy.new(path,wp) -- string boolean -- table -- Returns a proxy object for a given path that acts like a filesystem.
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local cpath = fs.canonical(path).."/"
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if not fs.exists(path) or not fs.isDirectory(path) then
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error("invalid directory")
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end
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local originalProxy = fs.get(path)
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local proxy = {}
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for k,v in pairs(originalProxy) do
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if type(v) ~= "table" then
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proxy[k] = v
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end
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end
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local handles = {}
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function proxy.isReadOnly()
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return wp or originalProxy.isReadOnly()
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end
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function proxy.getLabel()
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return originalProxy.getLabel()
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end
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function proxy.spaceUsed()
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return originalProxy.spaceUsed()
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end
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function proxy.spaceTotal()
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return originalProxy.spaceTotal()
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end
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function proxy.exists(path)
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return fs.exists(cpath..sanitisePath(path))
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end
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function proxy.isDirectory(path)
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return fs.isDirectory(cpath..sanitisePath(path))
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end
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function proxy.makeDirectory(path)
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if wp then return false, "read-only filesystem" end
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return fs.makeDirectory(cpath..sanitisePath(path))
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end
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function proxy.rename(from, to)
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if wp then return false, "read-only filesystem" end
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return fs.rename(cpath..sanitisePath(from),cpath..sanitisePath(to))
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end
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function proxy.list(path)
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local rt = {}
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local iter, err = fs.list(cpath..sanitisePath(path))
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if not iter then return nil, err end
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for name in iter do
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rt[#rt+1] = name
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end
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return rt
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end
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function proxy.lastModified(path)
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return fs.lastModified(cpath..sanitisePath(path))
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end
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function proxy.remove(path)
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if wp then return false, "read-only filesystem" end
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return fs.remove(cpath..sanitisePath(path))
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end
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function proxy.size(path)
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return fs.size(cpath..sanitisePath(path))
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end
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function proxy.dirstat(path) -- bundle the metadata about files into the listing to reduce round trips
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local rt = {}
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local dp = cpath..sanitisePath(path).."/"
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local iter, err = fs.list(dp)
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if not iter then return nil, err end
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for name in iter do
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rt[name] = {fs.isDirectory(dp..name), fs.size(dp..name), fs.lastModified(dp..name)}
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end
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return rt
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end
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function proxy.open(path,mode)
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if wp and mode:find("[wa]") then return false, "read-only filesystem" end
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local h, e = fs.open(cpath..sanitisePath(path),mode)
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if not h then return h, e end
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handles[#handles+1] = h
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return #handles
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end
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function proxy.seek(handle, whence, offset)
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return handles[handle]:seek(whence,offset)
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end
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function proxy.write(handle, data)
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return handles[handle]:write(data)
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end
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function proxy.read(handle, count)
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return handles[handle]:read(count)
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end
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function proxy.close(handle)
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return handles[handle]:close()
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end
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return proxy
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end
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return fsproxy
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