Attask - Pass backslash (\) in URL as value

I am trying to pass set of values which has backslash("\") in them. This breaks the URL. The URL I submit is https://{mycompany}.attasksandbox.com/attask/api/project?ID=57ba84---1&updates={"description":"ToImplementWorkFront","URL":"T:%5CTechnologyWorkRequests%5C2016%5CTAD160888_Communications"}&apiKey=g--t&method=put

I basically want to pass values to URL field as "URL": "T:\TechnologyWorkRequests\2016\TAD160888_Communications"

I understand backslash is an unsafe character and hence encoded as %5C as well as %255C- but I get JSON parsing error. I am able to pass a forward slash(/) encoding it as %2F but I am not able to pass "\" character. Can any one please help? Thanks in advance!

Solution

For this kind of task you should use POST instead of GET method. If you still want to use GET you can do something like following example:

"https://posturl/?update=" + encodeURIComponent("{ \"path\": \"C:\\Windows\\System32\"}")

More safe:

var data = {
    "path": "C:\\Windows\\System32\"
}
var url = "https://posturl/?update=" + encodeURIComponent(JSON.stringify(data))