Fortnite 1.8 custom rules for Fiddler (outdated)

CustomRules.js

import System;
import System.Web;
import System.Windows.Forms;
import Fiddler;

class Handlers
{
    static var SquadPlayground = false;
    static var RegionOverride = "NAE";

    static function OnBeforeRequest(oSession: Session) {
        // Apparently, Epic updated the authorization token, so let's change that.
        if (oSession.HostnameIs("account-public-service-prod03.ol.epicgames.com")) {
            if (oSession.PathAndQuery.Contains("/account/api/oauth/token")) {
                oSession.oRequest.headers["Authorization"] = "basic MzQ0NmNkNzI2OTRjNGE0NDg1ZDgxYjc3YWRiYjIxNDE6OTIwOWQ0YTVlMjVhNDU3ZmI5YjA3NDg5ZDMxM2I0MWE=";
            }
        }

        if (oSession.HostnameIs("fortnite-public-service-prod11.ol.epicgames.com")) {
            // A fix for profile0 error, etc...
            if (oSession.PathAndQuery.Contains("/QueryProfile?profileId=profile0")) {
                oSession.url = oSession.url.Replace("profileId=profile0","profileId=athena");
            }
            else if (oSession.PathAndQuery.StartsWith("/fortnite/api/game/v2/matchmakingservice/ticket/player/")) {
                // TODO: Clean up this code
                var uriSplit    = (oSession.url + "?").split("?");
                var queryString = HttpUtility.ParseQueryString(uriSplit[1]);
                var bucketSplit = queryString.Get("bucketId").split(":");
                
                bucketSplit[0] = "REPLACE_BUILDID";
                
                bucketSplit[2] = RegionOverride; // Set region override

                // 2  = Solo
                // 10 = Duo
                // 9  = Squad
                switch (bucketSplit[3]) {
                    case "2":  bucketSplit[3] = "playlist_defaultsolo"; queryString.Remove("player.option.fillTeam"); break;
                    case "10": bucketSplit[3] = "playlist_defaultduo";                                                break;
                    
                    case "9":
                        if (SquadPlayground)
                            bucketSplit[3] = "playlist_playground";
                        else
                            bucketSplit[3] = "playlist_defaultsquad";
                        break;
                    
                    default: FiddlerObject.alert("Unknown Match Type (" + bucketSplit[3] + ")"); // Cannot handle this match type
                }
                
                var bucketString = bucketSplit.join(":");
                queryString.Set("bucketId", bucketString);
                
                // TODO: Handle subregions?
                switch (bucketSplit[2]) {
                    case "NAE":
                        queryString.Set("player.subregions", "OH,VA");
                        break;
                }
                
                queryString.Set("player.option.crossplayOptOut", "false"); // I guess to opt out of crossplay?
                
                queryString.Set("party.WIN", "true"); // Windows platform
                
                // Input style is Keyboard & Mouse
                queryString.Set("input.KBM", "true");
                queryString.Set("player.input", "KBM");
                
                queryString.Set("player.playerGroups", queryString["partyPlayerIds"]); // TODO: Support this?
                
                oSession.url = uriSplit[0] + "?" + queryString.ToString(); // Hackjob
            }
        }
    }

    static function OnBeforeResponse(oSession: Session) {
        oSession.utilDecodeResponse(); // Decode response before handling anything
        
        if (oSession.HostnameIs("fortnite-public-service-prod11.ol.epicgames.com")) {
            // VersionCheck bypass
            if (oSession.PathAndQuery.StartsWith("/fortnite/api/versioncheck?version=")) {
                oSession.oResponse.headers.HTTPResponseCode   = 200;
                oSession.oResponse.headers.HTTPResponseStatus = "200 OK";
                    
                oSession.oResponse.headers.Remove("X-Epic-Error-Code");
                oSession.oResponse.headers.Remove("X-Epic-Error-Name");
                    
                oSession.utilSetResponseBody("{\"type\":\"NO_UPDATE\"}");
            }

            // Empty JSON request to bypass some errors
            else if (oSession.PathAndQuery.Contains("/RefreshExpeditions")   ||
                oSession.PathAndQuery.Contains("/IncrementNamedCounterStat") ||
                oSession.PathAndQuery.Contains("/GetMcpTimeForLogin")) {
                
                oSession.oResponse.headers.HTTPResponseCode   = 200;
                oSession.oResponse.headers.HTTPResponseStatus = "200 OK";
                    
                oSession.oResponse.headers.Remove("X-Epic-Error-Code");
                oSession.oResponse.headers.Remove("X-Epic-Error-Name");
                    
                oSession.utilSetResponseBody("{}");
            }
        }
    }
}

After 2/3 years of this FiddlerScript being broken, I'm proud to announce a new FiddlerScript (in C#) that doesn't require any other software other than Fiddler!

https://gist.github.com/nyamimi/fa59cabe76a338793680384a7db62e48