Shiny by RStudio

Parse a GET query string from a URL

parseQueryString(str, nested = FALSE)

Arguments

str The query string. It can have a leading "?" or not.
nested Whether to parse the query string of as a nested list when it contains pairs of square brackets []. For example, the query a[i1][j1]=x&b[i1][j1]=y&b[i2][j1]=z will be parsed as list(a = list(i1 = list(j1 = 'x')), b = list(i1 = list(j1 = 'y'), i2 = list(j1 = 'z'))) when nested = TRUE, and list(`a[i1][j1]` = 'x', `b[i1][j1]` = 'y', `b[i2][j1]` = 'z') when nested = FALSE.

Description

Returns a named list of key-value pairs.

Examples

parseQueryString("?foo=1&bar=b%20a%20r")
$foo [1] "1" $bar [1] "b a r"
## Not run: ------------------------------------ # # Example of usage within a Shiny app # function(input, output, session) { # # output$queryText <- renderText({ # query <- parseQueryString(session$clientData$url_search) # # # Ways of accessing the values # if (as.numeric(query$foo) == 1) { # # Do something # } # if (query[["bar"]] == "targetstring") { # # Do something else # } # # # Return a string with key-value pairs # paste(names(query), query, sep = "=", collapse=", ") # }) # } ## ---------------------------------------------