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-module(shurbej_http_spa). |
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-export([init/2]). |
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%% Catch-all handler: serves index.html for browser navigation, |
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%% returns JSON 404 for API-like requests. |
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init(Req0, State) -> |
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case is_browser_navigation(Req0) of |
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true -> |
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serve_spa(Req0, State); |
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false -> |
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Req = shurbej_http_common:error_response(404, <<"Not found">>, Req0), |
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{ok, Req, State} |
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end. |
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serve_spa(Req0, State) -> |
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case file:read_file(shurbej_http:web_dist_path("index.html")) of |
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{ok, Body} -> |
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:-( |
Req = cowboy_req:reply(200, |
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#{<<"content-type">> => <<"text/html; charset=utf-8">>}, |
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Body, Req0), |
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:-( |
{ok, Req, State}; |
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{error, _} -> |
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Req = cowboy_req:reply(404, |
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#{<<"content-type">> => <<"text/plain">>}, |
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<<"UI not built — run: cd web && npm run build">>, Req0), |
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{ok, Req, State} |
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end. |
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%% Only serve the SPA for GET requests that accept HTML (browser navigation). |
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is_browser_navigation(Req) -> |
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case cowboy_req:method(Req) of |
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<<"GET">> -> |
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Accept = cowboy_req:header(<<"accept">>, Req, <<>>), |
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binary:match(Accept, <<"text/html">>) =/= nomatch; |
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_ -> |
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false |
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end. |