regex - Regular expression for parsing name value pairs

Question

Can someone provide a regular expression for parsing name/value pairs from a string? The pairs are separated by commas, and the value can optionally be enclosed in quotes. For example:

AssemblyName=foo.dll,ClassName="SomeClass",Parameters="Some,Parameters"

Answer 1

• No escape:

  /([^=,]*)=("[^"]*"|[^,"]*)/
  

• Double quote escape for both key and value:

  /((?:"[^"]*"|[^=,])*)=((?:"[^"]*"|[^=,])*)/
  
  key=value,"key with "" in it"="value with "" in it",key=value" "with" "spaces
  

• Backslash string escape:

  /([^=,]*)=("(?:\.|[^"\]+)*"|[^,"]*)/
  
  key=value,key="value",key="val"ue"
  

• Full backslash escape:

  /((?:\.|[^=,]+)*)=("(?:\.|[^"\]+)*"|(?:\.|[^,"\]+)*)/
  
  key=value,key="value",key="val"ue",ke,y=val,ue
  

Edit: Added escaping alternatives.

Edit2: Added another escaping alternative.

You would have to clean up the keys/values by removing any escape-characters and surrounding quotes.