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28 lines
860 B
Lua
28 lines
860 B
Lua
function replace_prefix(str, prefix, value)
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return str:gsub("^"..prefix, value)
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end
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function envoy_on_request(request_handle)
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end
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function envoy_on_response(response_handle)
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local headers = response_handle:headers()
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local metadata = response_handle:metadata()
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-- should be in the form:
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-- [{
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-- "header":"Location",
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-- "prefix":"http://localhost:8000/two/",
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-- "value":"http://frontend/one/"
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-- }]
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local rewrite_response_headers = metadata:get("rewrite_response_headers")
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if rewrite_response_headers then
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for _, obj in pairs(rewrite_response_headers) do
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local hdr = headers:get(obj.header)
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if hdr ~= nil then
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local newhdr = replace_prefix(hdr, obj.prefix, obj.value)
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headers:replace(obj.header, newhdr)
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end
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end
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end
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end
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