// Copyright 2019 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

syntax = "proto3";

package google.cloud.scheduler.v1;

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

option go_package = "google.golang.org/genproto/googleapis/cloud/scheduler/v1;scheduler";
option java_multiple_files = true;
option java_outer_classname = "TargetProto";
option java_package = "com.google.cloud.scheduler.v1";

// Http target. The job will be pushed to the job handler by means of
// an HTTP request via an [http_method][google.cloud.scheduler.v1.HttpTarget.http_method] such as HTTP
// POST, HTTP GET, etc. The job is acknowledged by means of an HTTP
// response code in the range [200 - 299]. A failure to receive a response
// constitutes a failed execution. For a redirected request, the response
// returned by the redirected request is considered.
message HttpTarget {
  // Required.
  //
  // The full URI path that the request will be sent to. This string
  // must begin with either "http://" or "https://". Some examples of
  // valid values for [uri][google.cloud.scheduler.v1.HttpTarget.uri] are:
  // `http://acme.com` and `https://acme.com/sales:8080`. Cloud Scheduler will
  // encode some characters for safety and compatibility. The maximum allowed
  // URL length is 2083 characters after encoding.
  string uri = 1;

  // Which HTTP method to use for the request.
  HttpMethod http_method = 2;

  // The user can specify HTTP request headers to send with the job's
  // HTTP request. This map contains the header field names and
  // values. Repeated headers are not supported, but a header value can
  // contain commas. These headers represent a subset of the headers
  // that will accompany the job's HTTP request. Some HTTP request
  // headers will be ignored or replaced. A partial list of headers that
  // will be ignored or replaced is below:
  // - Host: This will be computed by Cloud Scheduler and derived from
  // [uri][google.cloud.scheduler.v1.HttpTarget.uri].
  // * `Content-Length`: This will be computed by Cloud Scheduler.
  // * `User-Agent`: This will be set to `"Google-Cloud-Scheduler"`.
  // * `X-Google-*`: Google internal use only.
  // * `X-AppEngine-*`: Google internal use only.
  //
  // The total size of headers must be less than 80KB.
  map<string, string> headers = 3;

  // HTTP request body. A request body is allowed only if the HTTP
  // method is POST, PUT, or PATCH. It is an error to set body on a job with an
  // incompatible [HttpMethod][google.cloud.scheduler.v1.HttpMethod].
  bytes body = 4;

  // The mode for generating an `Authorization` header for HTTP requests.
  //
  // If specified, all `Authorization` headers in the [HttpTarget.headers][google.cloud.scheduler.v1.HttpTarget.headers]
  // field will be overridden.
  oneof authorization_header {
    // If specified, an
    // [OAuth token](https://developers.google.com/identity/protocols/OAuth2)
    // will be generated and attached as an `Authorization` header in the HTTP
    // request.
    //
    // This type of authorization should be used when sending requests to a GCP
    // endpoint.
    OAuthToken oauth_token = 5;

    // If specified, an
    // [OIDC](https://developers.google.com/identity/protocols/OpenIDConnect)
    // token will be generated and attached as an `Authorization` header in the
    // HTTP request.
    //
    // This type of authorization should be used when sending requests to third
    // party endpoints or Cloud Run.
    OidcToken oidc_token = 6;
  }
}

// App Engine target. The job will be pushed to a job handler by means
// of an HTTP request via an [http_method][google.cloud.scheduler.v1.AppEngineHttpTarget.http_method] such
// as HTTP POST, HTTP GET, etc. The job is acknowledged by means of an
// HTTP response code in the range [200 - 299]. Error 503 is
// considered an App Engine system error instead of an application
// error. Requests returning error 503 will be retried regardless of
// retry configuration and not counted against retry counts. Any other
// response code, or a failure to receive a response before the
// deadline, constitutes a failed attempt.
message AppEngineHttpTarget {
  // The HTTP method to use for the request. PATCH and OPTIONS are not
  // permitted.
  HttpMethod http_method = 1;

  // App Engine Routing setting for the job.
  AppEngineRouting app_engine_routing = 2;

  // The relative URI.
  //
  // The relative URL must begin with "/" and must be a valid HTTP relative URL.
  // It can contain a path, query string arguments, and `#` fragments.
  // If the relative URL is empty, then the root path "/" will be used.
  // No spaces are allowed, and the maximum length allowed is 2083 characters.
  string relative_uri = 3;

  // HTTP request headers.
  //
  // This map contains the header field names and values. Headers can be set
  // when the job is created.
  //
  // Cloud Scheduler sets some headers to default values:
  //
  // * `User-Agent`: By default, this header is
  //   `"AppEngine-Google; (+http://code.google.com/appengine)"`.
  //   This header can be modified, but Cloud Scheduler will append
  //   `"AppEngine-Google; (+http://code.google.com/appengine)"` to the
  //   modified `User-Agent`.
  // * `X-CloudScheduler`: This header will be set to true.
  //
  // If the job has an [body][google.cloud.scheduler.v1.AppEngineHttpTarget.body], Cloud Scheduler sets
  // the following headers:
  //
  // * `Content-Type`: By default, the `Content-Type` header is set to
  //   `"application/octet-stream"`. The default can be overridden by explictly
  //   setting `Content-Type` to a particular media type when the job is
  //   created.
  //   For example, `Content-Type` can be set to `"application/json"`.
  // * `Content-Length`: This is computed by Cloud Scheduler. This value is
  //   output only. It cannot be changed.
  //
  // The headers below are output only. They cannot be set or overridden:
  //
  // * `X-Google-*`: For Google internal use only.
  // * `X-AppEngine-*`: For Google internal use only.
  //
  // In addition, some App Engine headers, which contain
  // job-specific information, are also be sent to the job handler.
  map<string, string> headers = 4;

  // Body.
  //
  // HTTP request body. A request body is allowed only if the HTTP method is
  // POST or PUT. It will result in invalid argument error to set a body on a
  // job with an incompatible [HttpMethod][google.cloud.scheduler.v1.HttpMethod].
  bytes body = 5;
}

// Pub/Sub target. The job will be delivered by publishing a message to
// the given Pub/Sub topic.
message PubsubTarget {
  // Required.
  //
  // The name of the Cloud Pub/Sub topic to which messages will
  // be published when a job is delivered. The topic name must be in the
  // same format as required by PubSub's
  // [PublishRequest.name](https://cloud.google.com/pubsub/docs/reference/rpc/google.pubsub.v1#publishrequest),
  // for example `projects/PROJECT_ID/topics/TOPIC_ID`.
  //
  // The topic must be in the same project as the Cloud Scheduler job.
  string topic_name = 1;

  // The message payload for PubsubMessage.
  //
  // Pubsub message must contain either non-empty data, or at least one
  // attribute.
  bytes data = 3;

  // Attributes for PubsubMessage.
  //
  // Pubsub message must contain either non-empty data, or at least one
  // attribute.
  map<string, string> attributes = 4;
}

// App Engine Routing.
//
// For more information about services, versions, and instances see
// [An Overview of App
// Engine](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine),
// [Microservices Architecture on Google App
// Engine](https://cloud.google.com/appengine/docs/python/microservices-on-app-engine),
// [App Engine Standard request
// routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed),
// and [App Engine Flex request
// routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
message AppEngineRouting {
  // App service.
  //
  // By default, the job is sent to the service which is the default
  // service when the job is attempted.
  string service = 1;

  // App version.
  //
  // By default, the job is sent to the version which is the default
  // version when the job is attempted.
  string version = 2;

  // App instance.
  //
  // By default, the job is sent to an instance which is available when
  // the job is attempted.
  //
  // Requests can only be sent to a specific instance if
  // [manual scaling is used in App Engine
  // Standard](https://cloud.google.com/appengine/docs/python/an-overview-of-app-engine?hl=en_US#scaling_types_and_instance_classes).
  // App Engine Flex does not support instances. For more information, see
  // [App Engine Standard request
  // routing](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed)
  // and [App Engine Flex request
  // routing](https://cloud.google.com/appengine/docs/flexible/python/how-requests-are-routed).
  string instance = 3;

  // Output only. The host that the job is sent to.
  //
  // For more information about how App Engine requests are routed, see
  // [here](https://cloud.google.com/appengine/docs/standard/python/how-requests-are-routed).
  //
  // The host is constructed as:
  //
  //
  // * `host = [application_domain_name]`</br>
  //   `| [service] + '.' + [application_domain_name]`</br>
  //   `| [version] + '.' + [application_domain_name]`</br>
  //   `| [version_dot_service]+ '.' + [application_domain_name]`</br>
  //   `| [instance] + '.' + [application_domain_name]`</br>
  //   `| [instance_dot_service] + '.' + [application_domain_name]`</br>
  //   `| [instance_dot_version] + '.' + [application_domain_name]`</br>
  //   `| [instance_dot_version_dot_service] + '.' + [application_domain_name]`
  //
  // * `application_domain_name` = The domain name of the app, for
  //   example <app-id>.appspot.com, which is associated with the
  //   job's project ID.
  //
  // * `service =` [service][google.cloud.scheduler.v1.AppEngineRouting.service]
  //
  // * `version =` [version][google.cloud.scheduler.v1.AppEngineRouting.version]
  //
  // * `version_dot_service =`
  //   [version][google.cloud.scheduler.v1.AppEngineRouting.version] `+ '.' +`
  //   [service][google.cloud.scheduler.v1.AppEngineRouting.service]
  //
  // * `instance =` [instance][google.cloud.scheduler.v1.AppEngineRouting.instance]
  //
  // * `instance_dot_service =`
  //   [instance][google.cloud.scheduler.v1.AppEngineRouting.instance] `+ '.' +`
  //   [service][google.cloud.scheduler.v1.AppEngineRouting.service]
  //
  // * `instance_dot_version =`
  //   [instance][google.cloud.scheduler.v1.AppEngineRouting.instance] `+ '.' +`
  //   [version][google.cloud.scheduler.v1.AppEngineRouting.version]
  //
  // * `instance_dot_version_dot_service =`
  //   [instance][google.cloud.scheduler.v1.AppEngineRouting.instance] `+ '.' +`
  //   [version][google.cloud.scheduler.v1.AppEngineRouting.version] `+ '.' +`
  //   [service][google.cloud.scheduler.v1.AppEngineRouting.service]
  //
  //
  // If [service][google.cloud.scheduler.v1.AppEngineRouting.service] is empty, then the job will be sent
  // to the service which is the default service when the job is attempted.
  //
  // If [version][google.cloud.scheduler.v1.AppEngineRouting.version] is empty, then the job will be sent
  // to the version which is the default version when the job is attempted.
  //
  // If [instance][google.cloud.scheduler.v1.AppEngineRouting.instance] is empty, then the job will be
  // sent to an instance which is available when the job is attempted.
  //
  // If [service][google.cloud.scheduler.v1.AppEngineRouting.service],
  // [version][google.cloud.scheduler.v1.AppEngineRouting.version], or
  // [instance][google.cloud.scheduler.v1.AppEngineRouting.instance] is invalid, then the job will be sent
  // to the default version of the default service when the job is attempted.
  string host = 4;
}

// The HTTP method used to execute the job.
enum HttpMethod {
  // HTTP method unspecified. Defaults to POST.
  HTTP_METHOD_UNSPECIFIED = 0;

  // HTTP POST
  POST = 1;

  // HTTP GET
  GET = 2;

  // HTTP HEAD
  HEAD = 3;

  // HTTP PUT
  PUT = 4;

  // HTTP DELETE
  DELETE = 5;

  // HTTP PATCH
  PATCH = 6;

  // HTTP OPTIONS
  OPTIONS = 7;
}

// Contains information needed for generating an
// [OAuth token](https://developers.google.com/identity/protocols/OAuth2).
// This type of authorization should be used when sending requests to a GCP
// endpoint.
message OAuthToken {
  // [Service account email](https://cloud.google.com/iam/docs/service-accounts)
  // to be used for generating OAuth token.
  // The service account must be within the same project as the job. The caller
  // must have iam.serviceAccounts.actAs permission for the service account.
  string service_account_email = 1;

  // OAuth scope to be used for generating OAuth access token.
  // If not specified, "https://www.googleapis.com/auth/cloud-platform"
  // will be used.
  string scope = 2;
}

// Contains information needed for generating an
// [OpenID Connect
// token](https://developers.google.com/identity/protocols/OpenIDConnect). This
// type of authorization should be used when sending requests to third party
// endpoints or Cloud Run.
message OidcToken {
  // [Service account email](https://cloud.google.com/iam/docs/service-accounts)
  // to be used for generating OIDC token.
  // The service account must be within the same project as the job. The caller
  // must have iam.serviceAccounts.actAs permission for the service account.
  string service_account_email = 1;

  // Audience to be used when generating OIDC token. If not specified, the URI
  // specified in target will be used.
  string audience = 2;
}
