openresty / openresty/lua-nginx-module

huge size response via ngx.location.capture has been truncated

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C
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Description

the size of this response is more than 80k, ngx.location.capture return with status 200 and truncate false, but in fact it has been truncated, which i can get full response from upstream via directly curl.
i use json_decode(from cjosn) decode the response above, but it throw exceptions like " Expected comma or object end but found T_END at character 88993" or "Expected object key string but found unexpected end of string at character 91105", so I suspect it has been truncated.

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Research direction

Start by reproducing the issue with ngx.location.capture against an upstream response larger than 80k, then compare the returned body and truncate status with a direct curl response. Trace the ngx.location.capture implementation and existing tests; done means the full response is returned or truncation is reported accurately, with the JSON decoding failure no longer occurring.

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Assessment

Tech stack
c, lua
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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