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Extract parameters from a form query string

getFormParams.Rd

This function facilitates getting the parameter names and values from a URL that is an parameterized HTML query.

This is motivated by a function from Chris Davis and Delft University.

Usage

getFormParams(query, isURL = grepl("^(http|\\?)", query))

Arguments

query

the query string or full URL containing the query

isURL

a logical value. If TRUE, query is the full URL and we need to extract the sub-string representing the parameters. If isURL is FALSE, then query is assumed to be just the string containing the parameters.

Value

A named character vector giving the parameter values The names are the parameter names.

Author

Duncan Temple Lang

Examples

  getFormParams("https://example.invalid/foo/bob.R?xyz=1&abc=verylong")
#>        xyz        abc 
#>        "1" "verylong" 

  getFormParams("xyz=1&abc=verylong")
#>        xyz        abc 
#>        "1" "verylong" 
  getFormParams("xyz=1&abc=&on=true")
#>    xyz    abc     on 
#>    "1"     "" "true" 
  getFormParams("xyz=1&abc=")
#> xyz abc 
#> "1"  ""