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Test, Build, and Deploy / test-build-deploy (push) Failing after 32s
115 lines
4.3 KiB
Erlang
115 lines
4.3 KiB
Erlang
-module(http_server).
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-export([route/1, ok_response/1, not_found_response/0,
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welcome_body/0, capabilities_body/0,
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capabilities_path/0,
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match_prefix/2, actors_prefix/0, actor_doc_response/1]).
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%% HTTP request router per design §16.1.
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%%
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%% Request shape (mirrors what the SX-side `http-listen` builds and
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%% the http:listen/2 BIF bridge marshals into a proplist):
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%% [{method, Binary}, {path, Binary}, {query, Binary},
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%% {headers, [{Name, Value}, ...]}, {body, Binary}]
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%%
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%% Response shape:
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%% [{status, Integer}, {headers, [{Name, Value}, ...]}, {body, Binary}]
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%%
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%% Real dispatch (actor docs, outbox listings, /activity POST,
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%% /.well-known/sx-capabilities, etc.) lands in Step 8c+. Step 8b
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%% wires the route/1 shape and a single hello-world handler that
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%% proves the request→response round-trip.
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%%
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%% Method/path comparison uses integer-segment binaries because
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%% `<<"GET">>` truncates to a single byte in this port.
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route(Req) ->
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M = field(method, Req),
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P = field(path, Req),
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dispatch(M, P).
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%% 71 69 84 = "GET" | 47 = "/"
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dispatch(<<71, 69, 84>>, <<47>>) ->
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ok_response(welcome_body());
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%% GET /.well-known/sx-capabilities
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dispatch(<<71, 69, 84>>,
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<<47,46,119,101,108,108,45,107,110,111,119,110,
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47,115,120,45,99,97,112,97,98,105,108,105,116,105,101,115>>) ->
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ok_response(capabilities_body());
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%% GET /actors/{id}
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dispatch(<<71, 69, 84>>, Path) ->
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case match_prefix(actors_prefix(), Path) of
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{ok, Id} ->
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case byte_size(Id) of
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0 -> not_found_response();
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_ -> actor_doc_response(Id)
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end;
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nomatch ->
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not_found_response()
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end;
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dispatch(_, _) ->
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not_found_response().
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%% "fed-sx kernel m1\n" — 17 bytes, hand-spelled.
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%% f e d - s x _ k e r n e l _ m 1 \n
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welcome_body() ->
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<<102,101,100,45,115,120,32,107,101,114,110,101,108,32,109,49,10>>.
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%% "/.well-known/sx-capabilities" — exposed for callers that build
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%% requests in tests or that need the canonical path string.
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capabilities_path() ->
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<<47,46,119,101,108,108,45,107,110,111,119,110,
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47,115,120,45,99,97,112,97,98,105,108,105,116,105,101,115>>.
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%% Capability descriptor body. Returned as plain text per design
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%% §16; future content-negotiation work (Step 8d) layers JSON /
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%% dag-cbor / SX representations on top.
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%%
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%% Lines (each terminated by \n = 10):
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%% "kernel: fed-sx-m1\n"
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%% "version: 0.0.1\n"
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%% "verbs: Create Update Delete\n"
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capabilities_body() ->
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<<107,101,114,110,101,108,58,32,102,101,100,45,115,120,45,109,49,10,
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118,101,114,115,105,111,110,58,32,48,46,48,46,49,10,
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118,101,114,98,115,58,32,67,114,101,97,116,101,32,85,112,100,97,116,101,32,68,101,108,101,116,101,10>>.
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ok_response(Body) ->
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[{status, 200}, {headers, []}, {body, Body}].
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not_found_response() ->
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[{status, 404}, {headers, []},
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{body, <<110,111,116,32,102,111,117,110,100,10>>}]. % "not found\n"
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%% Internal property-list field lookup. Returns nil when missing
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%% so the route falls into the not_found arm gracefully.
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field(K, [{K, V} | _]) -> V;
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field(K, [_ | Rest]) -> field(K, Rest);
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field(_, []) -> nil.
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%% ── Dynamic-segment routing ─────────────────────────────────────
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%%
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%% match_prefix(Prefix, Path) — if Path starts with the entire
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%% Prefix binary, return {ok, Rest} where Rest is the remaining
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%% bytes; else return nomatch. Pure byte-level pattern match,
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%% no regex / no parsing. Path-segment splitting comes in later
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%% sub-deliverables (8c-art, 8c-proj) where it's needed.
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match_prefix(<<>>, Rest) -> {ok, Rest};
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match_prefix(<<B, PRest/binary>>, <<B, PathRest/binary>>) ->
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match_prefix(PRest, PathRest);
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match_prefix(_, _) -> nomatch.
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%% "/actors/" — 8 bytes: 47 97 99 116 111 114 115 47
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actors_prefix() ->
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<<47,97,99,116,111,114,115,47>>.
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%% Actor doc stub. Real implementation (Step 8c continuation) will
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%% fetch the actor-state projection entry and serialise it; v1
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%% returns the id as the body so route resolution can be exercised
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%% end-to-end without the projection wiring.
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actor_doc_response(Id) ->
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%% "actor: " — 7 bytes
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Pre = <<97,99,116,111,114,58,32>>,
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Body = <<Pre/binary, Id/binary, 10>>,
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ok_response(Body).
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