LLe27

package main

import (
	"encoding/json"
	"net/http"
	"strings"

	"github.com/TykTechnologies/tyk/log"
)

LLe27

NOTE: It's important to note that this is NOT PRODUCTION READY code and is only used as an example build from. It is EXPECTED that you test and prove this out on your own based on your use-case and understand what the Tyk Gateway has to offer / expected to do.

This is an example using custom go plugins to dynamically set the target_url for a given Tyk Classic API Definition. This workaround solution revolves around the idea that you can utilize the URL Rewrite middleware as a way to trigger the Gateway to rewrite the target_url in a custom go plugin satisfying the following code: https://github.com/TykTechnologies/tyk/blob/master/gateway/reverse_proxy.go#L271C6-L271C67.

Basic testing has been done and it should preserve the METHOD and relative PATH.

The minimum requirement here is that you need to configure your Tyk Classic API Definition such that the Tyk Gateway is aware of the URL Rewrite and to satisfy the condition: if spec.URLRewriteEnabled && req.Context().Value(ctx.RetainHost) == true

LLe27

package main

import (
	"net/http"

	"github.com/TykTechnologies/tyk/ctx"
	"github.com/TykTechnologies/tyk/log"
)

var logger = log.Get()

LLe27

{
  "custom_middleware": {
      "pre": [],
      "post": [],
      "post_key_auth": [],
      "auth_check": {
        "disabled": false,
        "name": "Authenticate",
        "path": "/opt/tyk-gateway/middleware/CustomGoPlugin.so",
        "require_session": false,

LLe27

// dump command for tyk-pump ./tyk-pump --demo=6538df7641102200887bfe99 --demo-track-path --demo-days=90 --demo-records-per-hour=100 --conf=./pump.conf

LLe27

func AddFooBarHeader(rw http.ResponseWriter, r *http.Request) {

	cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRegion("us-east-1"),
		config.WithCredentialsProvider(credentials.NewStaticCredentialsProvider(
			"KEYID",
			"SECRET",
			"AWS_TOKEN")),
	)
	if err != nil {
		fmt.Println("Couldn't load default configuration. Have you set up your AWS account?")

LLe27

var logger = log.Get()

// Main method to be run by Tyk
func DetectMTLS(w http.ResponseWriter, r *http.Request) {
	logger.Info("-----------")
	logger.Info("Detecting if TLS is used for this request!")

	if r.TLS == nil {
		logger.Warn("TLS IS NOT being used for this request!")
		return

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"custom_middleware": {
    "pre": [
      {
        "name": "AddFooBarHeader",
        "path": "CustomGoPlugin.so",
        "require_session": false,
        "raw_body_only": false
      }
    ],
    "driver": "goplugin",

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{
    // Custom Plugin Config
    "custom_middleware": {
        "pre": [],
        "post": [
            {
                "disabled": false,
                "name": "WebSocketAnalytics",
                "path": "/opt/tyk-gateway/middleware/CustomGoPlugin.so",
                "require_session": false,

LLe27

package main

import (
	"context"
	"net/http"

	"github.com/TykTechnologies/tyk/log"
)

// HTTP Request Contexts & Go Reference: