从GetHttpRequestData（）。headers检索接受语言的ColdFusion错误

Question

I'm attempting to pull the variable GetHttpRequestData().headers.accept-language in ColdFusion 2018, but am getting an error.

1. The main object GetHttpRequestData().headers looks fine. This is information from the html request header.

2. I can also pull back other values in the headers object like GetHttpRequestData().headers.host or GetHttpRequestData().headers.accept

3. However, if the variable name contains a dash ie. GetHttpRequestData().headers.accept-language , I get an error because CF Thinks I'm executing a mathematical function.

How can I return this variable? It should be simple.

cffiddle example

// Dump the Object    
writeDump(var="#GetHttpRequestData().headers#",format="html")

// Dump a result in the Object OK
writeDump(var="#GetHttpRequestData().headers.host#",format="text")

// Dump a result in the Object OK
writeDump(var="#GetHttpRequestData().headers.accept#",format="text")

// CF Thinks I'm executing a mathematical function
// when structure variable has a dash in the name
try {
    writeDump(var="#GetHttpRequestData().headers.accept-language#",format="text")
} catch (any e) {
    writeOutput("Error: " & e.message);
} 

Answer 1

Answer to ColdFusion variables with dash separators.

Use the chained variable in the following manner:

 #GetHttpRequestData().headers['accept-language']#

• note the drop of the point separator