syntax = "proto3";

package envoy.api.v2;
option java_package = "io.envoyproxy.envoy.api.v2";
option java_multiple_files = true;

option java_generic_services = true;

import "envoy/api/v2/core/base.proto";
import "envoy/api/v2/discovery.proto";
import "envoy/api/v2/route/route.proto";

import "google/api/annotations.proto";
import "google/protobuf/wrappers.proto";

import "validate/validate.proto";
import "gogoproto/gogo.proto";

option (gogoproto.equal_all) = true;

// [#protodoc-title: HTTP route configuration]
// * Routing :ref:`architecture overview <arch_overview_http_routing>`
// * HTTP :ref:`router filter <config_http_filters_router>`

// The resource_names field in DiscoveryRequest specifies a route configuration.
// This allows an Envoy configuration with multiple HTTP listeners (and
// associated HTTP connection manager filters) to use different route
// configurations. Each listener will bind its HTTP connection manager filter to
// a route table via this identifier.
service RouteDiscoveryService {
  rpc StreamRoutes(stream DiscoveryRequest) returns (stream DiscoveryResponse) {
  }

  rpc IncrementalRoutes(stream IncrementalDiscoveryRequest)
      returns (stream IncrementalDiscoveryResponse) {
  }

  rpc FetchRoutes(DiscoveryRequest) returns (DiscoveryResponse) {
    option (google.api.http) = {
      post: "/v2/discovery:routes"
      body: "*"
    };
  }
}

// [#comment:next free field: 9]
message RouteConfiguration {
  // The name of the route configuration. For example, it might match
  // :ref:`route_config_name
  // <envoy_api_field_config.filter.network.http_connection_manager.v2.Rds.route_config_name>` in
  // :ref:`envoy_api_msg_config.filter.network.http_connection_manager.v2.Rds`.
  string name = 1;

  // An array of virtual hosts that make up the route table.
  repeated route.VirtualHost virtual_hosts = 2 [(gogoproto.nullable) = false];

  // Optionally specifies a list of HTTP headers that the connection manager
  // will consider to be internal only. If they are found on external requests they will be cleaned
  // prior to filter invocation. See :ref:`config_http_conn_man_headers_x-envoy-internal` for more
  // information.
  repeated string internal_only_headers = 3;

  // Specifies a list of HTTP headers that should be added to each response that
  // the connection manager encodes. Headers specified at this level are applied
  // after headers from any enclosed :ref:`envoy_api_msg_route.VirtualHost` or
  // :ref:`envoy_api_msg_route.RouteAction`. For more information, including details on
  // header value syntax, see the documentation on :ref:`custom request headers
  // <config_http_conn_man_headers_custom_request_headers>`.
  repeated core.HeaderValueOption response_headers_to_add = 4
      [(validate.rules).repeated .max_items = 1000];

  // Specifies a list of HTTP headers that should be removed from each response
  // that the connection manager encodes.
  repeated string response_headers_to_remove = 5;

  // Specifies a list of HTTP headers that should be added to each request
  // routed by the HTTP connection manager. Headers specified at this level are
  // applied after headers from any enclosed :ref:`envoy_api_msg_route.VirtualHost` or
  // :ref:`envoy_api_msg_route.RouteAction`. For more information, including details on
  // header value syntax, see the documentation on :ref:`custom request headers
  // <config_http_conn_man_headers_custom_request_headers>`.
  repeated core.HeaderValueOption request_headers_to_add = 6
      [(validate.rules).repeated .max_items = 1000];

  // Specifies a list of HTTP headers that should be removed from each request
  // routed by the HTTP connection manager.
  repeated string request_headers_to_remove = 8;

  // An optional boolean that specifies whether the clusters that the route
  // table refers to will be validated by the cluster manager. If set to true
  // and a route refers to a non-existent cluster, the route table will not
  // load. If set to false and a route refers to a non-existent cluster, the
  // route table will load and the router filter will return a 404 if the route
  // is selected at runtime. This setting defaults to true if the route table
  // is statically defined via the :ref:`route_config
  // <envoy_api_field_config.filter.network.http_connection_manager.v2.HttpConnectionManager.route_config>`
  // option. This setting default to false if the route table is loaded dynamically via the
  // :ref:`rds
  // <envoy_api_field_config.filter.network.http_connection_manager.v2.HttpConnectionManager.rds>`
  // option. Users may which to override the default behavior in certain cases (for example when
  // using CDS with a static route table).
  google.protobuf.BoolValue validate_clusters = 7;
}