Frida Script to automatically redirect all java.net.URLConnections through a proxy of your choosing

automatically_redirect.js

// Frida Script to automatically redirect all java.net.URLConnections through a proxy of your choosing

setImmediate(function() {
    Java.perform(function() {

        var url = Java.use("java.net.URL");
        var proxyTypeI = Java.use('java.net.Proxy$Type');
        var inetSockAddrWrap = Java.use("java.net.InetSocketAddress");
        var proxy = Java.use('java.net.Proxy');

        url.$init.overload('java.lang.String').implementation = function (var0) {
            console.log("[*] Created new URL with value: " + var0 +"\n");
            return this.$init(var0);
        };

        url.openConnection.overload().implementation = function () {
            console.log("[*] Created new URL connection\n");

            /*
            try{
                console.log("A - calling Proxy.Type.valueOf('HTTP')");
                var proxyTypeImpl = proxyTypeI.valueOf("HTTP");
                console.log("ProxyType:" + proxyTypeImpl);
            }
            catch(e){console.log("caught:" + e);}*/

            //console.log("B - Creating      java.net.InetSocketAddress wrapper");            
            
            console.log("B - iNSTANTIATING  java.net.InetSocketAddress ");
            var inetSockAddrImpl = inetSockAddrWrap.$new("whatever.proxy.address.blah",8080)
            var proxyImpl;

            try{
                console.log("C - Creating Proxy wrapper");        
                //var proxyImpl1 = proxy.$new();
                //console.log(proxyImpl1);
                //console.log(proxyImpl1.getClass());

                console.log("ProxyType:" + proxyTypeI.HTTP);
                console.log("InetSockAddr:" + inetSockAddrImpl);

                proxyImpl = proxy.$new(proxyTypeI.valueOf('HTTP'), inetSockAddrImpl);
            }
            catch(e){
                console.log(e);
            }

            console.log("D - Returning Proxy wrapper");    

            return this.openConnection(proxyImpl);
        };

        url.openConnection.overload('java.net.Proxy').implementation = function (var0) {
            console.log("[*] Created new URL connection with proxy value: " + var0 +"\n");
            return this.openConnection(var0);
        };


        var URLConnection = Java.use("java.net.URLConnection");

        URLConnection.connect.implementation = function () {
            console.log("[*] Connect called.\n");
            this.connect();
        };

        URLConnection.getContent.overload().implementation = function () {
            var content = this.getContent();
            console.log("[*] Get content called. Content: " + content + "\n");
            return content;
        };

        URLConnection.getContentType.implementation = function () {
            var contentType = this.getContentType();
            console.log("[*] Get content type called. Content type: " + contentType + "\n");
            return contentType;
        };

        URLConnection.getContentLength.implementation = function () {
            var contentLength = this.getContentLength();
            console.log("[*] Get content length called. Content length: " + contentLength + "\n");
            return contentLength;
        };

        URLConnection.getContentLengthLong.implementation = function () {
            var contentLengthLong = this.getContentLengthLong();
            console.log("[*] Get content length long called. Content length long: " + contentLengthLong + "\n");
            return contentLengthLong;
        };

        URLConnection.getContentEncoding.implementation = function () {
            var contentEncoding = this.getContentEncoding();
            console.log("[*] Get content encoding called. Content encoding: " + contentEncoding + "\n");
            return contentEncoding;
        };

        URLConnection.getDate.implementation = function () {
            var contentDate = this.getDate();
            console.log("[*] Get date called. Date: " + contentDate + "\n");
            return contentDate;
        };

        URLConnection.getExpiration.implementation = function () {
            var contentExpiration = this.getExpiration();
            console.log("[*] Get expiration called. Expiration: " + contentExpiration + "\n");
            return contentExpiration;
        };

        URLConnection.getLastModified.implementation = function () {
            var lastModified = this.getLastModified();
            console.log("[*] Get last modified called. Value: " + lastModified + "\n");
            return lastModified;
        };

        URLConnection.getInputStream.implementation = function () {
            console.log("[*] Get input stream called.\n");
            return this.getInputStream;
        };

        URLConnection.setDoOutput.overload('boolean').implementation = function (var0) {
            console.log("[*] URLConnection.setDoOutput called with value: " + var0 + ".\n");
            this.setDoOutput(var0);
        };

        URLConnection.setDoInput.overload('boolean').implementation = function (var0) {
            console.log("[*] URLConnection.setDoInput called with value: " + var0 + ".\n");
            this.setDoInput(var0);
        };

        var httpURLConnection = Java.use("com.android.okhttp.internal.huc.HttpURLConnectionImpl");

        httpURLConnection.setRequestMethod.overload('java.lang.String').implementation = function (var0) {
            console.log("[*] Set request method called: " + var0 + "\n");
            this.setRequestMethod(var0);
        };

        httpURLConnection.setRequestMethod.overload('java.lang.String').implementation = function (var0) {
            console.log("[*] Set request method called: " + var0 + "\n");
            this.setRequestMethod(var0);
        };    

        httpURLConnection.connect.implementation = function () {
            console.log("[*] Connect called.\n");
            this.connect();
        };

        httpURLConnection.disconnect.implementation = function () {
            console.log("[*] Disconnect called.\n");
            this.disconnect();
        };

        httpURLConnection.getResponseCode.implementation = function () {
            var responseCode  = this.getResponseCode();
            console.log("[*] Get response code called: " + responseCode + "\n");
            return responseCode;
        };

        var httpsURLConnection = Java.use("com.android.okhttp.internal.huc.HttpsURLConnectionImpl");

        httpsURLConnection.setRequestMethod.overload('java.lang.String').implementation = function (var0) {
            console.log("[*] Set request method called: " + var0 + "\n");
            this.setRequestMethod(var0);
        };

        httpsURLConnection.connect.implementation = function () {
            console.log("[*] Connect called.\n");
            this.connect();
        };

        httpsURLConnection.disconnect.implementation = function () {
            console.log("[*] Disconnect called.\n");
            this.disconnect();
        };

        httpsURLConnection.getResponseCode.implementation = function () {
            var responseCode  = this.getResponseCode();
            console.log("[*] Get response code called: " + responseCode + "\n");
            return responseCode;
        };

        httpsURLConnection.setRequestProperty.overload('java.lang.String', 'java.lang.String').implementation = function (var0, var1) {
            console.log("[*] URLConnection.setRequestProperty called with key: " + var0 + " and value: " + var1 + ".\n");
            this.setRequestProperty(var0, var1);
        };
    });
});