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fix large response body

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wiaamm
2025-11-12 12:55:13 +02:00
parent 74959bf32b
commit 1d63a71795
1 changed files with 67 additions and 4 deletions
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71
attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua
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@@ -182,14 +182,12 @@ function NanoHandler.body_filter(conf)
local body = kong.response.get_raw_body() local body = kong.response.get_raw_body()
if body then if body and #body > 0 then
ctx.body_seen = true ctx.body_seen = true
local verdict, response, modifications = nano.send_body(session_id, session_data, body, nano.HttpChunkType.HTTP_RESPONSE_BODY) local verdict, response, modifications = nano.send_body(session_id, session_data, body, nano.HttpChunkType.HTTP_RESPONSE_BODY)
-- Initialize if not exists
ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0 ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
-- Handle body modifications if any
if modifications then if modifications then
body = nano.handle_body_modifications(body, modifications, ctx.body_buffer_chunk) body = nano.handle_body_modifications(body, modifications, ctx.body_buffer_chunk)
kong.response.set_raw_body(body) kong.response.set_raw_body(body)
@@ -201,11 +199,76 @@ function NanoHandler.body_filter(conf)
nano.fini_session(session_data) nano.fini_session(session_data)
ctx.session_finalized = true ctx.session_finalized = true
local result = nano.handle_custom_response(session_data, response) local result = nano.handle_custom_response(session_data, response)
-- Clean up allocated memory
nano.cleanup_all() nano.cleanup_all()
return result return result
end end
return return
elseif ctx.expect_body then
kong.log.debug("Response body not in memory, attempting to read from buffer/file")
local body_data = ngx.var.response_body
if body_data and #body_data > 0 then
kong.log.debug("Found response body in nginx var, size: ", #body_data)
ctx.body_seen = true
local verdict, response, modifications = nano.send_body(session_id, session_data, body_data, nano.HttpChunkType.HTTP_RESPONSE_BODY)
ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
if modifications then
body_data = nano.handle_body_modifications(body_data, modifications, ctx.body_buffer_chunk)
kong.response.set_raw_body(body_data)
end
ctx.body_buffer_chunk = ctx.body_buffer_chunk + 1
if verdict == nano.AttachmentVerdict.DROP then
nano.fini_session(session_data)
ctx.session_finalized = true
local result = nano.handle_custom_response(session_data, response)
nano.cleanup_all()
return result
end
return
else
-- Try to read from response body file
local body_file = ngx.var.response_body_file
if body_file then
kong.log.debug("Reading response body from file: ", body_file)
local file = io.open(body_file, "rb")
if file then
local entire_body = file:read("*all")
file:close()
if entire_body and #entire_body > 0 then
kong.log.debug("Sending entire response body of size ", #entire_body, " bytes to C module")
ctx.body_seen = true
local verdict, response, modifications = nano.send_body(session_id, session_data, entire_body, nano.HttpChunkType.HTTP_RESPONSE_BODY)
ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
if modifications then
entire_body = nano.handle_body_modifications(entire_body, modifications, ctx.body_buffer_chunk)
kong.response.set_raw_body(entire_body)
end
ctx.body_buffer_chunk = ctx.body_buffer_chunk + 1
if verdict == nano.AttachmentVerdict.DROP then
nano.fini_session(session_data)
ctx.session_finalized = true
local result = nano.handle_custom_response(session_data, response)
nano.cleanup_all()
return result
end
return
end
else
kong.log.warn("Failed to open response body file: ", body_file)
end
else
kong.log.debug("Response body expected but no body data or file available")
end
end
end end
if ctx.body_seen or ctx.expect_body == false then if ctx.body_seen or ctx.expect_body == false then