dongdigua/demo.lua
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discard executing if not POST, fix table access

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dongdigua 2023-07-25 14:45:22 +08:00
parent cac7ac7164
commit 2751ce2d2e
1 changed files with 15 additions and 5 deletions
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20
demo.lua
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@ -29,10 +29,15 @@ input {
Demo Demo
</H1> </H1>
<P>
Try Lua before
<A HREF="https://lua.org/download.html">downloading</A> it.
Enter your Lua program
or
choose one of the demo programs below.
<DIV CLASS="menubar"> <DIV CLASS="menubar">
<A HREF="/demo.lua?hello">hello</A> <A HREF="/demo.lua?hello">hello</A>
&middot;
</DIV> </DIV>
<FORM ACTION="/demo.lua" METHOD="POST"> <FORM ACTION="/demo.lua" METHOD="POST">
@ -65,7 +70,7 @@ demos["hello"] = "print[[hello shenjack]]"
local query=os.getenv("QUERY_STRING") local query=os.getenv("QUERY_STRING")
if #query > 0 then if #query > 0 then
T=demos[query] T=demos[query] or ""
end end
-- continue HTML began in shell script -- continue HTML began in shell script
@ -77,11 +82,12 @@ write[[</TEXTAREA>
<INPUT TYPE="reset" VALUE="restore"> <INPUT TYPE="reset" VALUE="restore">
<INPUT TYPE="button" VALUE="restart" onclick="window.location.href='/demo.lua'"> <INPUT TYPE="button" VALUE="restart" onclick="window.location.href='/demo.lua'">
</FORM> </FORM>
]]
<H2>Output</H2>
<TEXTAREA ROWS="8" COLS="72">]]
io.flush() io.flush()
if os.getenv("REQUEST_METHOD") == "POST" then
-- delete unsafe functions -- delete unsafe functions
arg=nil arg=nil
debug.debug=nil debug.debug=nil
@ -101,6 +107,9 @@ package=nil
require=nil require=nil
-- run program in global environment -- run program in global environment
write[[<H2>Output</H2>
<TEXTAREA ROWS="8" COLS="72">]]
T,E=load(T,"=input","t") T,E=load(T,"=input","t")
if not T then if not T then
print(E) E="failed to compile" I="alert" print(E) E="failed to compile" I="alert"
@ -119,3 +128,4 @@ end
write('</TEXTAREA><P><IMG SRC="https://lua.org/images/',I,'.png" ALIGN="absbottom">\n') write('</TEXTAREA><P><IMG SRC="https://lua.org/images/',I,'.png" ALIGN="absbottom">\n')
write('Your program ',E,'.\n') write('Your program ',E,'.\n')
end