prefix is either a full URL prefix of the form "http://example.com:8080", or it can be simply a host and optional port like "example.com" or "example.com:8080", in these cases, the "http://" will be added

Escape a string with a specified set of allowed characters.

Escape a string by urlencoding all the characters that aren't in the allowed string.

Parameters:

	str	The raw URI to escape.
	allowed	Character array of allowed characters
	is_allowed_sorted	Optimization hint if allowed array is sorted.

Returns:

Returns the escaped uri or an empty string.

Escape a raw url with a reasonable set of allowed characters.

The default set was chosen to match HTTP urls and general guidelines for naming resources. Passing in a raw url does not produce well defined results because you really need to know which segments are path parts because path parts are supposed to be escaped individually. The default set chosen is:

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz 0123456789 -._~ :@!$'()*+,=/?&#;

*NOTE: This API is basically broken because it does not allow you to specify significant path characters. For example, if the filename actually contained a /, then you cannot use this function to generate the serialized url for that resource.

Parameters:

str

The raw URI to escape.

Returns:

Returns the escaped uri or an empty string.

given a name value map, return a serialized query string.

Parameters:

query_map

a map of name value. every value must be representable as a string.

Returns:

Returns an url query string of '?n1=v1&n2=v2&...'

unescape an escaped URI string.

Parameters:

str

The escped URI to unescape.

Returns:

Returns the unescaped uri or an empty string.