SimpleHTTPRequestHandler incorrectly handles trailing escaped slash

[serhiy-storchaka]

Bug report

For path to directory which does not end with slash ("/"), SimpleHTTPRequestHandler returns status MOVED_PERMANENTLY with redirection to new path that ends with slash. Slashes can be percent-encoded, although this is not necessary. But the code that checks for the trailing slash does not take this into account (in two place).

Linked PRs

• gh-134098: Fix handling %-encoded trailing slash in SimpleHTTPRequestHandler #134099
• [3.14] gh-134098: Fix handling %-encoded trailing slash in SimpleHTTPRequestHandler (GH-134099) #134123
• [3.13] gh-134098: Fix handling %-encoded trailing slash in SimpleHTTPRequestHandler (GH-134099) #134124

[serhiy-storchaka]

Other effect of this bug -- a percent-encoded trailing slash is ignored after non-directory path (should return status NOT_FOUND).

[donbarbos]

since you mentioned request handling, what do you think about making http.server accept "absolute form" as "request target"?
issue #132741