Kong request headers
Kong request headers. I thought I could do like: --data "config. <header-name>) or $(headers["<header-name>"])) querystring. tyree731 July 2, 2020, 1:19pm 5. 5. 0 in db-less mode using declarative yaml. get_header("token") Replace SERVICE_NAME with the name of the service that this plugin configuration will target. get_header (name) Returns the value of the specified response header. You can see your available ingresses by running kubectl get service. headers option. func (r Request) GetScheme () (s string, err error) { return r. If you have control over the application sending the requests for example, ensure it's sending the expected Host header to match what has been set in the Kong Gateway. Otherwise, semantically equivalent requests that uses HTTP/1. When OPAPolicy is applied, the control plane configures: May 3, 2021 · Hi @issambaccouch!If you want to rename api-key to apikey you need only --data "config. Fortunately, we figured this out thanks to the Kong-Debug: 1 header. Apr 30, 2019 · I am using kong as an API gateway. Kong Mesh integrates the Open Policy Agent (OPA) to provide access control for your services. g. Check if the route that should be matching the request is enabled. I'm trying to update the request body with a value present in the headers. Validate requests before they reach their upstream service. I have set up a client, Kong gateway, and server. If that also doesn’t exist, it returns the default value ‘“unknown”’. Request debugging provides the following insights: Jul 12, 2021 · Summary Env: K8s Deployment via Helm Kong version (2. Install post-function plugin on the route you wish the header removed from. get_host() -- \"example. -- Pega o valor do header 'token' da requisição. 3. To do so, the file kong. Check the Kong configuration to make sure that there is a route that matches the request’s URL and headers. ANSWER. request. $(query_params. With pre-function you could modify the request. Ask (`kong. However in https://docs. x uses the new KongUpstreamPolicy resource to configure upstream settings. kong for kubernetes 2. The spec field of KongUpstreamPolicy is similar to the upstream section of KongIngress, with the following differences: Field names now use lowerCamelCase instead of snake_case to be consistent with Kubernetes APIs. The header will not be removed. For example, due to legacy reasons, your upstream endpoint may have a base URI like /api/oilers/. 'Accept)) Make a request with an 'Accept' header. Note: The KongPlugin resource only needs to be defined once and can be applied to any service, consumer, or route in the namespace. If I set a top-level JSON attribute it all works OK. 1 we use kong as api gateway in k8s, we has a client A ,and client B , A calls B with an custom header, but B receives seems not get the custom header example : upstream B log: we use nginx to compare, and we can succes May 13, 2017 · Actually, once Kong verify the JWT token associated to the consumer, it will put extra information in the request headers like x-consumer-custom-id, x=consumer-username, x-consumer-groups, etc If you're willing to add a consumer entry for each user you have in your database, associate the custom-id of your consumer to the real user id of is_body_transformed, body = transform_multipart_body(conf, body, content_length, content_type_value) When a client has been authenticated, the plugin appends some headers to the request before proxying it to the upstream service, so that you can identify the consumer in your code: X-Consumer-ID: The ID of the consumer in Kong. 6 Current Behavior kong. When try to access the application through kong route with jwt plugin authentication with added the bearer key in the header of the request. } return r. jit-uuid library to generate a version 4 UUID (v4 UUID). GetHost Apr 18, 2022 · With this plugin and post-function you can write custom logic with lua and modify the response. x`. , kong-. As requests come through Kong, you can configure the plugin to transform those requests—mutating headers, query string parameters, the request body and so on—before forwarding those requests to their final destination. get_hostname ()). 0. The value is returned -- as a Lua string. The tracing API will detect the propagation format from the headers, and will use the appropriate format to propagate the span context. name ( string ): The name of the header. headers: myheader: $ (consumer_id) myheader is a name for new header and I want to set variable of consumer_id value in these header. Header-Name:$(uri_captures["user-id"] or query_params["user"] or "unknown") This will first look for the path parameter named user-id (in uri_captures ). 1 Version 3. Jul 6, 2018 · Kong is a transparent proxy, and as such, should forward all headers to the upstream, with the exception of Hop-by-hop headers of course. I am trying to send a request with following headers. <query-param-name>) or $(query_params["<query-param-name Dec 9, 2020 · config: add: headers: - x-new-header:value - x-another-header:something In some cases this even happens when there is no request transformer and we are not adding any config. Routing a request based on its Host header is the most straightforward way to proxy traffic through Kong Gateway, especially since this is the intended usage of the HTTP Host header. Jul 3, 2018 · As observed from Wireshark, Kong is not forwarding all the headers to upstream. Transform the response sent by the upstream server on the fly before returning the response to the client. replace. wlcp. 1 - - [12/Jun/2020:13:52:34 +0000] "GET /health HTTP/1. I have tried using the syslog plugin, but that only logs the request kong receives and the response it sends back to the client. created CRD for request transformer plugin. The instance name shows up in Kong Manager and in Konnect, so it's useful when running the same plugin in multiple contexts, for example, on multiple services. If no appropriate format is found, then @staticmethod def get_forwarded_host ()-> str: """ Returns the host component of the request's URL or the value of the "host" header. To do that, I used the plugin Kong Functions (Pre-Plugins), which allows me to execute lua scripts before any request. Jul 31, 2020 · To enable the dynamic routing use case based on header values, let’s enable the route-by-header plugin on this route. "com. The plugin first gets a list of the request headers and performs a removal action. 1 with Kong Ingress controller 0. Current Behavior. var. If the client is a browser, there is a known issue with this plugin caused by a limitation of the CORS specification that prevents specifying a custom Host header in a preflight OPTIONS request. For those new to Kong, a plugin allows Kong to apply policy to request and responses. Based on Nginx and the lua-nginx-module (specifically OpenResty ), Kong’s pluggable architecture makes it flexible and powerful. * start_services. Apr 26, 2022 · 3. 1 and via: kong/3. For those apps which you do not have control over, make it known perhaps in the API The custom_fields_by_lua configuration allows for the dynamic modification of log fields using Lua code. Contribute to Kong/kong development by creating an account on GitHub. http". Sep 8, 2023 · Manipulation of the request to the Service. cache_ttl instructed the plugin to flush values after 30 seconds. 3 version. I am looking to debug the request kong sends to the upstream and the response it receives. The order in which headers are added is retained. Steps To Reproduce. hash_on, hash_fallback, and their related has Oct 6, 2021 · How to add request_id to response header #7921. I am a new beginner for Kubernetes and kong, and i want to route my traffic to different backend service based on the request headers, and i try below setup, but it didnt work, so please kindly advised what i should to do. . #7921. The resulting headers are produced in lexicographical order. 4. GetScheme () returns the scheme component of the request’s URL. // The body argument must be a string and will not be processed in any way. http_endpoint: URL of the upstream server to which logs will be forwarded. Lua pattern expressions are valid, e. continue_on_error: required If the client is sending a header, then Kong will not change that header when using the config. Kong Gateway admins can debug requests by collecting timing information about a given request, on demand. header_filter, body_filter, log. * kong migrations bootstrap. Route Transformer Advanced: Transform routing by changing the upstream server, port, or path. io/ there is usually a DEBUG mode to run. Kong proxy container is logging lots of: kong-ingress-ff845f7d4-dhwf6 proxy 127. This header will likely be disabled in production environments — as it should — via a global response transformer Looking for the plugin's configuration parameters? You can find them in the Response Transformer configuration reference doc. 16. Request Parameter. At an instance in the application, the request header size is going above 8k. set_headers`, arg, nil) } // kong. Right now I'm getting, how can I hide server: nginx/1. checkout to `release/3. response. custom_fields_by_lua. //. Request header. an authentication plugin rejecting a request, or a caching plugin serving a cached response). By default, Kong uses the header name X-Real-IP. Selecting the preset will autopopulate the fields in your request headers. The IP address is determined by the request header sent to Kong from downstream. service. Ultimately, we would obviously need a concrete example of Apr 2, 2019 · Hi, When the request comes to Kong it contains an http header. sms. You can select your preset in the Presets dropdown list. The returned value is normalized to lowercase. You can use any of the current request headers, query parameters, and captured URI groups as templates to populate supported config fields. Key/value pairs: Choose plaintext, delete the default JSON formatting and replace it with the Header Name and Header Value separated by a colon. Unlike -- `kong. Request Headers can include rules and settings to define how an HTTP transaction should operate. Supports validating the schema of the body and the parameters of the request using either Kong’s own schema validator (body only) or a JSON Schema Draft 4 compliant validator. bea. In the kong admin UI, I set these parametes : config. * will include kong-id, kong-email, etc. route="return nil". Unlike kong. com:1234/v1/movies kong. 0 version of the plugin release. 3. Constant parts can be specified as part of the Dec 16, 2022 · However, this setting seems to simply be ignored and any request to an upstream service with Kong-Debug: 1 header leads to some debug headers (Kong-Route-Id, Kong-Route-Name, Kong-Route-Id, Kong-Service-Name) included in the response: Mar 13, 2022 · Kong plugin template. Check the conditions for the route to make sure that they are correct. Please check out those repos README files for usage instructions. Name: This can be whatever you like and will be used later when we reference the secret in the Request Transformer Plugin. Sep 7, 2021 · Kubernetes kong ingress controller route traffic by request header - Kong Nation. 0 standalone installation (DB-less) and like to know how can I hide/disable kong header in the request. * (include all claims). I would like to route traffic based on a request header to a service in my kubernetes cluster. node. keepalive: Keepalive duration for the connection. Kubernetes. Dec 4, 2023 · So my steps to reproduce it is as follows: All the steps are runned under bazel environment. Route configuration. The final option config. The agent is included in the data plane proxy sidecar, instead of the more common deployment as a separate sidecar. $(headers. b3, b3-single - Zipkin headers. g "X_realm_name = master" Is that possible using Kong request transformer? Replace SERVICE_NAME with the name of the service that this plugin configuration will target. Dec 10, 2020 · Hi Kong Nation I have installed and tested few plugins in our K8s clusters (jwt and basic auth) Currently I am having difficulty understanding how to implement the lambda function we created as a templated in our KongPlugin in K8s. add_header -- @phases `rewrite`, `access` -- @tparam string A list of querystring parameters that Kong will inspect to retrieve JWTs. // This function also sets the Content-Length header appropriately. I want to add some headers to my incoming rest api requests with kong gateway. Log request and response data using the best transport for your infrastructure You can find them in the Request Validator configuration reference doc. jpg"); const myHeaders = myRequest. A special case of this feature is routing by the Host header. set_header(), the headers argument must be a table in which each key is a string (corresponding to a header’s name), and each value is a string, or an array of strings. 4. on Sep 7, 2023. local token = kong. However, you want your publicly accessible API endpoint to now be named Feb 5, 2024 · In the Headers tab of your request, select the Presets dropdown list and choose Manage Presets. Nov 9, 2021 · Is there an existing issue for this? I have searched the existing issues Kong version ($ kong version) 2. jaeger - Jaeger headers. handler must return a table with one or more We have a use case where we would like to log response headers when utilizing the pre-function plugin. If you wanted to disable the x-forwarded-proto header for example: 1. Hence we are getting “Header too long”. Feb 6, 2020 · Rewrite Published URLs with Kong API Gateway. Is this possible? Apr 7, 2023 · In the following snippet, we create a new request using the Request() constructor (for an image file in the same directory as the script), then save the request headers in a variable: js. <plugin_name>. Jan 29, 2020 · Hi @hbagdi In our project, we have Kong version 1. The Go module system was introduced in Go 1. X-Consumer-Custom-ID: The custom_id of the consumer (if set). It will then add its own IP to the X-Forwarded-For header, and proxy the request to your upstream service. Jan 8, 2024 · Kong is an open-source API gateway and microservice management layer. Instead, several occurrences of the header will be -- present in the request. [docs] @staticmethod def add_header(header: str, value: Any) -> None: """ Adds a request header with the given value to the request to the Service. Either if lb or not you would use kong. 2. The kong_nginx. 4) - customized Kong-python-pdk - 0. For the example here I will name the secret "header" addMe:addValue Referenced as: In our example, the request body contained two strings: name: The name of the service; url: An argument that populates the host, port, and path attributes of the service; If your request was successful, you will see a 201 response header from Kong Gateway confirming that your service was created and the response body will be similar to: Mar 25, 2022 · When we talk about Request Headers, we’re referring to fields passed along in the header sections of HTTP requests. When I try and update the value in a sub-object within the JSON then it fails; well, it sets the value but not exactly where I need it to be). access=kong. Before we dive into code samples, let’s take a look at the key concepts in Kong: API Object – wraps properties of any HTTP Accessible as `kong. Defaults to . client. Enter key-value pairs, then select Add. You can also ready more about this behaviour in the Proxy Guide, specifically this mention: All the other request headers are forwarded as-is by Kong. Here is kong. headers configuration, even if the header is first removed with the config. Kong Gateway supports routing by arbitrary HTTP headers. X-Consumer-Username: The username of the consumer (if set). Pass each header separately; Comma-separated header:value pairs; Config as JSON body; Example: Adding a querystring and a header; Example: Appending and removing in one request In this livestream, Michael Heap, Director of DevRel explores Kong Gateway's request transformation plugins (it's more interesting than it sounds, honest!)02 An optional custom name to identify an instance of the plugin, for example request-transformer_my-service. headers using the plugin. In this mode you can actually see the headers in the request which help in debugging. get_header() function doesn't works in the log phase on external python plugins. Use a pre-function plugin to add a kong-hostname header globally by using config. It returns the "Request Header Or Cookie Too Large " message in the response. Details. mod file . local client = kong. -- -- If a trusted `X-Forwarded-Prefix` is not passed, this function must be -- called after Kong has run its router (`access` phase), -- as the Kong router may strip the prefix of the request path. OPA policy plugin. custom_fields_by_lua: Custom Lua expressions for adding fields to log entries. Because of this limitation, this plugin only works for routes that have been configured with a paths setting. Kong have a PDK you can use globally. Similarly, new fields can be added: Examples: Passing multiple headers in one request. Source code for kong. Transformations are highly configurable and extremely Route By Header: Route request based on request headers. Sep 10, 2021 · In any ingress controller like https://traefik. 0". content_type: Content type of the payload. AskString (`kong. get_forwarded_ip () Example Code. by prepending a string onto a header value as you want here. For this scenario, let's configure the plugin to route to a different upstream, httpbin2, if a header with version "v2" is part of the request. Method #1: Simply ensure that your client apps are sending the Host header correctly. Add the following line to the access phase of the post function header field: ngx. If not found, it will return the query parameter named user. This repository contains a very simple Kong plugin template to get you up and running quickly for developing your own plugins. kong-ingress-ff845f7d4-m5ctq Jun 30, 2020 · At the Kong level you’d probably want to use a serverless plugin in the header_filter phase to modify the existing Location header. You can add routes to a service in Kong Gateway using the following methods: Feb 21, 2023 · They created a route that will catch anything in the request path that begins with the letter ‘p'. Hi, Using kong 3. Note: The @request-target pseudo header was added in the 2. header. com\" Aug 5, 2021 · I am using Kubernetes and kong ingress controller. Th… Jul 27, 2021 · The Request Transformer plugin for Kong Gateway comes built in. If a different header name is required, it needs to be defined using the real_ip_header Nginx property. set_header ()`, this function doesn't remove any existing -- headers with the same name. The easiest way to disable these headers is with a post function plugin. x and HTTP/2 will generate different signature value. They did exactly what the documentation warned about. Debug requests. 25 each plugin as a microservice approach Issue: Python server is unable to get headers larger than 1024 cha Documentation for Kong, the Cloud Connectivity Company for APIs and Microservices. plugins. 11 and is the official dependency management solution for Go. set_header ("kong-hostname",kong. yml file I'm using: What version of UUID is used to generate the correlation ID in Kong, and how can I ensure that a unique Request ID is generated for all requests? ANSWER The correlation-id plugin in Kong uses the resty. build and start kong in some branch with the request-id feature supported, then stop kong. That stripped -- path becomes the return value of this function, unless there is already -- a trusted `X -- Given a request to https://example. Jan 16, 2018 · If your Kong instance is properly configured, it will be able to retrieve the client IP, as well as each individual IP from every previous HTTP hop between the client and itself. Template. headers… Dec 4, 2022 · Kong version ($ kong version) 2. The tracing API support to propagate the following headers: w3c - W3C trace context. I want to take that http header and put in another http header, but I don’t get get it to work. 1" 494 35 "-" "curl/7. I'm trying to add customer header when kong is redirecting request to upstream target but that header is not added. remove. kong. The host component of the request’s URL, or the value of the “Host” header: request port: The port component of the request’s URL: request_headers: The request headers received by Kong: request_query: The query arguments obtained from the query string: request_body: The request body received by Kong: request_method: The HTTP method of Mar 23, 2023 · I need to make a external security request before any request on my Kong Gateway. A Kong Gateway plugin allows you to inject custom logic (in Lua) at several entry-points in the life-cycle of a request/response or a tcp stream connection as it is proxied by Kong Gateway. The client connects Kong gateway with mTLS, Kong gateway connects the server with plain HTTP wit Mar 28, 2023 · However, i want to replace the {realm_name} field with a real realm name that the user provides in the header while doing the request. headers=api-key=apikey", there's no need to use templates or removing the header afterward. Mar 18, 2020 · we are able to see response headers modified after using the response-transformer plugin (created the kong plugin crd) but we are unable to see the request header modification. but after this configuration , kong gives me a empty value. rename. // The returned value is normalized to lower-case form. get_ip () or kong. * make build-venv. 0 in this request. RequestDeliveryReportFlag":"true" "test": "ok" At the upstream server "co Apr 12, 2019 · Configure the request-transformer plugin to remove a header (Configure the header with the first character in uppercase (e. headers; // Headers {} To add a header to the Headers object we use Headers. A common requirement for API gateways is to rewrite the published URL to a different URL for the upstream service’s endpoint. Script: local http = require "resty. return err. How to set up Rate Limiting Advanced depending on the presence of a request header when not using KIC and when using KIC 3 X-Kong-Proxy-Latency: 0 Via: kong/2. Below is the lambda function. 1. ot - OpenTracing headers. strategy=memory specifies the backing data store for cached responses. -- -- @function kong. Phases. zhengliu September 7, 2021, 6:37am 1. It is typical to see plugins using it to produce a response before Kong has a chance to proxy the request (e. This template was designed to work with the kong-pongo and kong-vagrant development environments. It will make the troubleshooting easier if your environment has multiple Kong instances. I tried setting the env KONG_HEADER: OFF but didn't help. Headers are found in the message body and include metadata about: The request and response body. * kong stop. get_headers () in the request-transformer, in that it returns Mar 28, 2023 · I did that using the request transformer plugin and it worked perfectly! However, is there a way that i can make the “realmName” in the uri dynamic? such that the user passes the realm name through headers and i replace the uri component “realmName” w timeout: Timeout for the HTTP log request. How to add request_id to response header. add. I am struggling to debug the requests that kong is making to upstreams. I have no idea how I can apply the function that replaces the header to the plugin… thats my problem Authorization:$((function Using templates as values. exit(status[, body[, headers]]) This function interrupts the current processing and produces a response. headers: Additional headers to include in the request. Name: add-req-headers Namespace: kong Labels: Annotations: Nov 28, 2019 · Request Header Or Cookie Too Large - Kubernetes - Kong Nation. Aug 17, 2021 · kong version: 2. Below is a snippet of an example configuration that removes the route field from the logs: --data config. * kong start. Unlike `kong. get_scheme`, nil) } // kong. get_header(), this function only returns a header if it is present in the response from the Service (ignoring headers added by Kong itself). From an initial look, it appears the issue lies with the use of kong. Note: This chapter assumes that you are familiar with Lua. response-transformer can modify the entirety of a header, but it can’t modify part, e. Example: kong. claims_to_include: required: A list of claims that Kong will expose in request headers. append Dec 26, 2023 · 1. plugin. upstream_x_forwarded_proto=nil. const myRequest = new Request("flowers. While starting the kong in Jun 8, 2023 · I am using Kong 3. Request. . Request` type Request struct { bridge. 6. Vinoth_Thiyagarajan November 28, 2019, 12:57pm 1. It is similar to the request-line pseudo header except that the HTTP version was removed from the signature calculation. This Admin API request configured a Proxy Cache plugin for all GET requests that resulted in response codes of 200 and response Content-Type headers that equal application/json. wlng. set_header()`, this function doesn't remove any existing headers with the same name. get_host()`, this function also considers `X-Forwarded-Host` if it comes from a trusted source. PdkBridge } // kong. 66. Authorization for the request. ServiceRequest SetRawBody () sets the body of the request to the Service. Check the request’s URL and headers. Parameters. Request debugging is triggered using a secure token and the resulting data is returned in a response header named X-Kong-Request-Debug-Output. Before you can start making requests against a service, you must add a route to it. e. Nov 11, 2019 · Hi, I’am having trouble configuring kong ingress controller in kubernetes. conf file allows us to have a request_id for each request, is there a way I can add this request_id to the response header? Thank you! Dec 18, 2023 · This seems like a naive question but I’ve never before tested this … with a plugin like request transformer, what is the difference in behavior between add a header and append a header? Looking at the source code for the basic version of the plugin, it looks like add will do nothing if a header already exists (which makes sense), but append will add the additional value in the plugin CORS limitations. We tried setting up #client_max_body_size = 16k, by setting KONG_CLIENT_MAX_BODY_SIZE in as the environment variable but it is not getting reflected. handler must return a table with one or more return err. Valid go. 8. In most cases, the header has a name of X-Real-IP or X-Forwarded-For. The host of these request should be the same. 🦍 The Cloud-Native API Gateway . Defaults to jwt. Key Concepts. Select Add Header Preset to add a new preset, and enter a name for the preset. Jun 12, 2020 · This is happening only with the nginx “healthcheck” service, any other service/ingress is working fine called from the internal apigw service. gi ez rd is om fw eu ta wo co