shiny (version 0.14.2)

parseQueryString: Parse a GET query string from a URL

Description

Returns a named list of key-value pairs.

Usage

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.

Examples

parseQueryString("?foo=1&bar=b%20a%20r")

## 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=", ")
#   })
# }
# ## End(Not run)