Modify path handling in web.rs, fix when ".tar" is file download

[wuooyun]

when i down load .tar file not tar path,
occur this error " thread 'actix-rt|system:0|arbiter:0' (8195) panicked at src/web.rs:38:55:
called Result::unwrap() on an Err value: Os { code: 2, kind: NotFound, message: "No such file or directory" }"
Remove canonicalization of the file path, fix it.

[gdamjan]

when i down load .tar file not tar path,

can you give an example?

[wuooyun]

[wuooyun]

this example "ip" not path , , "root/ip" use canonicalize() will return false because no this path

[gdamjan]

Even I don't understand the logic of that code :)

merged now, but I'll probably rewrite that part altogether