webmcp

annotate framework/env/execute/inner.lua @ 142:a686ed2ce967

Protect json.import(...) against Lua stack overflows (or integer overflows) due to too many nested levels
author jbe
date Wed Jul 30 02:01:24 2014 +0200 (2014-07-30)
parents 9fdfb27f8e67
children 1fcdd5c6f498
rev   line source
jbe/bsw@0 1 --[[--
jbe/bsw@0 2 execute.inner()
jbe/bsw@0 3
jbe/bsw@0 4 It is MANDATORY to call this function once in each filter of a WebMCP application. Calling execute.inner() calls the next filter in the filter chain, or the view or action, if there are no more filters following. Code executed BEFORE calling this function is executed BEFORE the view or action, while code executed AFTER calling this function is executed AFTER the view of action.
jbe/bsw@0 5
jbe/bsw@0 6 --]]--
jbe/bsw@0 7
jbe/bsw@0 8 function execute.inner()
jbe/bsw@0 9 local stack = execute._wrap_stack
jbe/bsw@0 10 local pos = #stack
jbe/bsw@0 11 if pos == 0 then
jbe/bsw@0 12 error("Unexpected call of execute.inner().")
jbe/bsw@0 13 end
jbe/bsw@0 14 local inner_func = stack[pos]
jbe/bsw@0 15 if not inner_func then
jbe/bsw@0 16 error("Repeated call of execute.inner().")
jbe/bsw@0 17 end
jbe/bsw@0 18 stack[pos] = false
jbe/bsw@0 19 inner_func()
jbe/bsw@0 20 end

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