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fix response body

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wiaamm
2025-11-17 23:53:24 +02:00
parent 847b35f673
commit bb0834aefd
1 changed files with 35 additions and 34 deletions
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69
attachments/kong/plugins/open-appsec-waf-kong-plugin/handler.lua
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@@ -192,48 +192,51 @@ function NanoHandler.body_filter(conf)
return
end
-- Get the current chunk from ngx.arg
-- Buffer chunks until we have the complete body
local chunk = ngx.arg[1]
local eof = ngx.arg[2]
kong.log.debug("[body_filter] Session: ", session_id, " | Chunk size: ", chunk and #chunk or 0, " | EOF: ", tostring(eof), " | body_seen: ", tostring(ctx.body_seen), " | expect_body: ", tostring(ctx.expect_body))
kong.log.debug("[body_filter] Session: ", session_id, " | Chunk size: ", chunk and #chunk or 0, " | EOF: ", tostring(eof))
-- Process body chunk if present
-- Accumulate body chunks
if chunk and #chunk > 0 then
ctx.body_seen = true
kong.log.debug("[body_filter] Processing response body chunk for session: ", session_id, ", size: ", #chunk, " bytes, EOF: ", tostring(eof))
local verdict, response, modifications = nano.send_body(session_id, session_data, chunk, nano.HttpChunkType.HTTP_RESPONSE_BODY)
ctx.body_buffer_chunk = ctx.body_buffer_chunk or 0
kong.log.debug("[body_filter] Session: ", session_id, " | Verdict after send_body: ", verdict, " | Chunk #: ", ctx.body_buffer_chunk)
if modifications then
kong.log.debug("[body_filter] Session: ", session_id, " | Applying body modifications")
chunk = nano.handle_body_modifications(chunk, modifications, ctx.body_buffer_chunk)
ngx.arg[1] = chunk
if not ctx.response_body_buffer then
ctx.response_body_buffer = {}
end
ctx.body_buffer_chunk = ctx.body_buffer_chunk + 1
if verdict == nano.AttachmentVerdict.DROP then
kong.log.warn("[body_filter] Body chunk verdict DROP for session: ", session_id)
nano.fini_session(session_data)
ctx.session_finalized = true
local result = nano.handle_custom_response(session_data, response)
nano.cleanup_all()
return result
end
else
kong.log.debug("[body_filter] Session: ", session_id, " | Empty or no chunk, EOF: ", tostring(eof))
table.insert(ctx.response_body_buffer, chunk)
kong.log.debug("[body_filter] Session: ", session_id, " | Buffered chunk, total chunks: ", #ctx.response_body_buffer)
end
-- Handle end of response
-- Process the complete body when we reach EOF
if eof then
kong.log.debug("[body_filter] Session: ", session_id, " | EOF reached, body_seen: ", tostring(ctx.body_seen), " | expect_body: ", tostring(ctx.expect_body))
kong.log.debug("[body_filter] Session: ", session_id, " | EOF reached")
if ctx.body_seen or ctx.expect_body == false then
-- Process buffered body if we have it
if ctx.response_body_buffer and #ctx.response_body_buffer > 0 then
local complete_body = table.concat(ctx.response_body_buffer)
kong.log.debug("[body_filter] Session: ", session_id, " | Processing complete body, size: ", #complete_body, " bytes")
local verdict, response, modifications = nano.send_body(session_id, session_data, complete_body, nano.HttpChunkType.HTTP_RESPONSE_BODY)
if modifications then
kong.log.debug("[body_filter] Session: ", session_id, " | Applying body modifications")
complete_body = nano.handle_body_modifications(complete_body, modifications, 0)
-- Update the buffered body with modifications
ngx.arg[1] = complete_body
end
if verdict == nano.AttachmentVerdict.DROP then
kong.log.warn("[body_filter] Body verdict DROP for session: ", session_id)
nano.fini_session(session_data)
ctx.session_finalized = true
local result = nano.handle_custom_response(session_data, response)
nano.cleanup_all()
return result
end
end
-- End inspection
if ctx.response_body_buffer or ctx.expect_body == false then
kong.log.debug("[body_filter] Session: ", session_id, " | Ending inspection")
local verdict, response = nano.end_inspection(session_id, session_data, nano.HttpChunkType.HTTP_RESPONSE_END)
@@ -252,8 +255,6 @@ function NanoHandler.body_filter(conf)
nano.fini_session(session_data)
nano.cleanup_all()
ctx.session_finalized = true
else
kong.log.debug("[body_filter] Session: ", session_id, " | EOF but not finalizing (body_seen: ", tostring(ctx.body_seen), ", expect_body: ", tostring(ctx.expect_body), ")")
end
end
end