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➜ MUSHclient
➜ Plugins
➜ Problems with escaping < > characters in plugins
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Problems with escaping < > characters in plugins
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It is now over 60 days since the last post. This thread is closed.
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| Posted by
| Eurotool
(14 posts) Bio
|
| Date
| Mon 19 Dec 2022 03:32 AM (UTC) |
| Message
| Hello, I am attempting to use the Convert_Word plugin described here: http://www.gammon.com.au/forum/?id=8747&reply=4#reply4
My objective is to remove the "<Public> " statements that initiate chat lines in the public channel of a MUD.
on line 23 works fine, but does not remove the angle brackets.
I have tried the following, with no success:
-> Line 31: Elements terminated out of sequence, expected </Public>, got </script> (Cannot load)
-> Line 23: Attribute name must start with letter or underscore, but starts with "\" (Cannot load)
-> Line 31: Elements terminated out of sequence, expected </Public>, got </script> (Cannot load)
-> Line 23: Attribute name must start with letter or underscore, but starts with "\" (Cannot load)
-> [string "Plugin"]:2: unexpected symbol near '<'
-> Line 31: No closing ";" in XML entity argument "<" (Cannot load)
-> [string "Plugin"]:2: unexpected symbol near '\'
<![CDATA[<Public>]]> = "",
<![CDATA[\<Public\>]]> = "",
<![CDATA[<Public>]]> = "",
<![CDATA[\<Public\>]]> = "",
I am out of options, not sure what to try next. | | Top |
|
| Posted by
| Nick Gammon
Australia (23,120 posts) Bio
Forum Administrator |
| Date
| Reply #1 on Mon 19 Dec 2022 04:42 AM (UTC) Amended on Mon 19 Dec 2022 04:44 AM (UTC) by Nick Gammon
|
| Message
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE muclient>
<muclient>
<plugin
name="Convert_Word"
author="Nick Gammon"
id="9c0ed228bdb4a71c77e85ce0"
language="Lua"
purpose="Converts one word to another"
date_written="2008-06-29"
requires="4.00"
version="1.0"
>
</plugin>
<!-- Script -->
<script>
conversions = {
["<Public>"] = "",
foo = "bar",
dog = "cat",
horse = "donkey",
-- add more here
}
function OnPluginPacketReceived (s)
return (string.gsub (s, "%a+", conversions))
end -- function OnPluginPacketReceived
</script>
</muclient>
Your problem is that in a Lua table, non-identifier type keys (like "<public>") have to be put into square brackets. And since it is a string you also quote it.
Then, since the plugin is in an XML file the < and > symbols have to be < and >.
Another approach, which saves you converting < and > symbols is to use CDATA, like this:
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE muclient>
<muclient>
<plugin
name="Convert_Word"
author="Nick Gammon"
id="9c0ed228bdb4a71c77e85ce0"
language="Lua"
purpose="Converts one word to another"
date_written="2008-06-29"
requires="4.00"
version="1.0"
>
</plugin>
<!-- Script -->
<script>
<![CDATA[
conversions = {
["<Public>"] = "",
foo = "bar",
dog = "cat",
horse = "donkey",
-- add more here
}
function OnPluginPacketReceived (s)
return (string.gsub (s, "%a+", conversions))
end -- function OnPluginPacketReceived
]]>
</script>
</muclient>
|
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| Nick Gammon
Australia (23,120 posts) Bio
Forum Administrator |
| Date
| Reply #2 on Mon 19 Dec 2022 04:49 AM (UTC) |
| Message
| You tried a lot of stuff, you must almost have hit upon the correction solution yourself. :)
See here for more talk about tables: http://www.gammon.com.au/forum/?id=6036 |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| Eurotool
(14 posts) Bio
|
| Date
| Reply #3 on Thu 22 Dec 2022 10:02 PM (UTC) |
| Message
| Unfortunately, nothing inside the brackets seem to be working.
in both scripts does nothing when encountering the string -- so it's not just about the <>. | | Top |
|
| Posted by
| Nick Gammon
Australia (23,120 posts) Bio
Forum Administrator |
| Date
| Reply #4 on Thu 22 Dec 2022 11:35 PM (UTC) Amended on Thu 22 Dec 2022 11:37 PM (UTC) by Nick Gammon
|
| Message
| OK, the replacement function is this:
return (string.gsub (s, "%a+", conversions))
That is searching for an alphabetic string. If you wanted other stuff in there, you would need to make a set, like this:
return (string.gsub (s, "[%a<> ]+", conversions))
That will match one or more of letters, less-than signs, greater-than signs, or a space.
That's if the whole thing is inside CDATA, otherwise replace < with < and > with >
Or maybe:
return (string.gsub (s, "<?[%a ]+>?", conversions))
That would constrain the matches to the < optionally being at the start, and the > optionally being at the end. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
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