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util.http: Implement parser for RFC 7239 Forwarded header

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Standardized and structured replacement for the X-Forwarded-For,
X-Forwarded-Proto set of headers.

Notably, this allows per-hop protocol information, unlike
X-Forwarded-Proto which is always a single value for some reason.
This commit is contained in:
Kim Alvefur 2023-06-03 16:15:52 +02:00
parent 517f20b523
commit 99906e5b9c
3 changed files with 55 additions and 0 deletions
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21
spec/util_http_spec.lua
View file

@ -108,4 +108,25 @@ describe("util.http", function()
assert.is_(http.contains_token("fo o", "foo"));
end);
end);
do
describe("parse_forwarded", function()
it("works", function()
assert.same({ { ["for"] = "[2001:db8:cafe::17]:4711" } }, http.parse_forwarded('For="[2001:db8:cafe::17]:4711"'), "case insensitive");
assert.same({ { ["for"] = "192.0.2.60"; proto = "http"; by = "203.0.113.43" } }, http.parse_forwarded('for=192.0.2.60;proto=http;by=203.0.113.43'),
"separated by semicolon");
assert.same({ { ["for"] = "192.0.2.43" }; { ["for"] = "198.51.100.17" } }, http.parse_forwarded('for=192.0.2.43, for=198.51.100.17'),
"Values from multiple proxy servers can be appended using a comma");
end)
it("rejects quoted quotes", function ()
assert.falsy(http.parse_forwarded('foo="bar\"bar'), "quoted quotes");
end)
pending("deals with quoted quotes", function ()
assert.same({ { foo = 'bar"baz' } }, http.parse_forwarded('foo="bar\"bar'), "quoted quotes");
end)
end)
end
end);