isJsonStructure() CFML User-Defined Function
source link: https://dev.to/gamesover/isjsonstructure-cfml-user-defined-function-1kg9
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isJsonStructure() CFML User-Defined Function
Aug 20
・1 min read
Apparently strings, numbers, true, false and null are considered valid JSON even though they consist of a single escaped value. (I recently discovered this while accepting API data from a third-party and they accidentally double-encoded the JSON body payload.
To prevent this issue from occurring again, I wrote a CFML User-Defined Function (UDF) to test whether a string can successfully parsed to an object and/or array (versus accepting an invalid simple value). Enjoy!
isJsonStructure(string, type="any")
https://gist.github.com/JamoCA/e153c2ea40bfd75b60d180fbb709fe5b
<cfscript> // 2020-08-20 isJsonStructure(string, type=all); // https://gist.github.com/JamoCA/e153c2ea40bfd75b60d180fbb709fe5b public boolean function isJsonStructure(required string string, string type="any") output=false hint="I return true if the string is a JSON-serialized struct or array." { if (not isJson(arguments.string)){ return false; } local.parsed = deserializeJson(arguments.string); if (not local.keyExists("parsed")){ return false; } if (isStruct(local.parsed) and (not len(trim(arguments.type)) or listFindNoCase("any,struct,structure,object,record,dictionary,hashtable,hash table,keyed list,associative array", trim(arguments.type)))){ return true; } else if (isArray(local.parsed) and (not len(trim(arguments.type)) or listFindNoCase("any,array,vector,list,sequence", trim(arguments.type)))){ return true; } return false; } </cfscript>
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