Querying the Details of a Forwarding Policy_Forwarding Policy_APIs (V3)_API Reference

Function

This API is used to view the details of a forwarding policy.

Calling Method

For details, see Calling APIs.

URI

GET /v3/{project_id}/elb/l7policies/{l7policy_id}

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition: Specifies the project ID. For details about how to obtain a project ID, see Obtaining a Project ID. Constraints: N/A Range: The value can contain a maximum of 32 characters, including digits and lowercase letters. Default value: N/A
l7policy_id	Yes	String	Definition: Specifies the forwarding policy ID.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Definition: Specifies the token used for IAM authentication. Constraints: N/A Range: N/A Default value: N/A

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
request_id	String	Definition: Specifies the request ID. Range: The value is automatically generated, and can contain characters including digits, lowercase letters, and hyphens (-).
l7policy	L7Policy object	Definition: Specifies the forwarding policy.

**Table 4** L7Policy
Parameter	Type	Description
action	String	Definition: Specifies the action of the forwarding policy. Constraints: REDIRECT_TO_LISTENER has the highest priority. If requests are to be redirected to an HTTPS listener, other forwarding policies of the listener will become invalid. If action is set to REDIRECT_TO_POOL, the listener's protocol must be HTTP, HTTPS, or TERMINATED_HTTPS. If action is set to REDIRECT_TO_LISTENER, the listener's protocol must be HTTP. Range: REDIRECT_TO_POOL: Requests are forwarded to another backend server group. REDIRECT_TO_LISTENER: Requests are redirected to an HTTPS listener. REDIRECT_TO_URL: Requests are redirected to another URL. FIXED_RESPONSE: A fixed response body is returned.
admin_state_up	Boolean	Definition: Specifies the administrative status of the forwarding policy. Constraints: The value can only be true.
description	String	Definition: Provides supplementary information about the forwarding policy.
id	String	Definition: Specifies the forwarding policy ID.
listener_id	String	Definition: Specifies the ID of the listener with which the forwarding policy is associated.
name	String	Definition: Specifies the forwarding policy name.
position	Integer	Definition: Specifies the priority of the forwarding policy. The priority cannot be updated. This parameter is unsupported. Please do not use it.
priority	Integer	Definition: Specifies the priority of the forwarding policy. A smaller value indicates a higher priority. Constraints: The priority must be unique for forwarding policies of the same listener. This parameter takes effect only when enhance_l7policy_enable is set to true. If this parameter is passed and enhance_l7policy_enable is set to false, an error will be returned. If enhance_l7policy_enable is set to false, forwarding policies are automatically prioritized based on the original policy sorting logic. The priorities of domain names are independent from each other. For the same domain name, the priorities are sorted in the order of exact match (EQUAL_TO), prefix match (STARTS_WITH), and regular expression match (REGEX). If the matching types are the same, the longer the path is, the higher the priority is. If a forwarding policy contains only a domain name without a path specified, the path is /, and prefix match is used by default. Range: If action is set to REDIRECT_TO_LISTENER, the priority ranges from 0 to 10,000. If action is set to other values, the priority ranges from 1 to 10,000. Default value: If this parameter is not passed and enhance_l7policy_enable is set to false, the priority of the new forwarding policy is 1. If action is set to REDIRECT_TO_LISTENER, the priority of the new forwarding policy is 0. If action is set to other values, the priority of the new forwarding policy will be a sum of 1 and the highest priority of existing forwarding policy in the same listener by default. If there is no forwarding policy, the priority of a new forwarding policy will be 1 by default. If the priority of an existing forwarding policy is the maximum value (10,000), the forwarding policy will fail to be created because the maximum value will be exceeded. In this case, specify a value or adjust the priorities of existing forwarding policies.
project_id	String	Definition: Specifies the ID of the project where the forwarding policy is used.
provisioning_status	String	Definition: Specifies the provisioning status of the forwarding policy. Range: ACTIVE (default): The forwarding policy is provisioned successfully.
redirect_pool_id	String	Definition: Specifies the ID of the backend server group to which requests will be forwarded. Constraints: This parameter takes effect only when action is set to REDIRECT_TO_POOL.
redirect_listener_id	String	Definition: Specifies the ID of the listener to which requests are redirected. Constraints: This parameter is mandatory when action is set to REDIRECT_TO_LISTENER. The listener's protocol must be HTTPS or TERMINATED_HTTPS. A listener added to another load balancer is not allowed. This parameter cannot be passed in the API for adding or updating a forwarding policy if action is set to REDIRECT_TO_POOL.
redirect_url	String	Definition: Specifies the URL to which requests will be forwarded. Range: The value must be in the format of protocol://host:port/path?query. This parameter is unsupported. Please do not use it.
rules	Array of RuleRef objects	Definition: Lists the forwarding rules in the forwarding policy.
redirect_url_config	RedirectUrlConfig object	Definition: Specifies the URL to which requests are forwarded. Constraints: This parameter takes effect only when enhance_l7policy_enable is set to true. If this parameter is passed and enhance_l7policy_enable is set to false, an error will be returned. This parameter is mandatory when action is set to REDIRECT_TO_URL. It cannot be specified if the value of action is not REDIRECT_TO_URL. Otherwise, an error is reported. Default value: The value must be in the format of protocol://host:port/path?query. At least one of the four parameters (protocol, host, port, and path) must be passed, or their values cannot be set to ${xxx} at the same time. ${xxx} indicates that the value in the request will be used. For example, ${host} indicates the host in the URL to be redirected. The values of protocol and port cannot be the same as those of the associated listener, and either host or path must be passed or their values cannot be ${xxx} at the same time.
redirect_pools_config	Array of RedirectPoolsConfig objects	Definition: Specifies the backend server groups that the requests are forwarded to. Constraints: A maximum of five backend server groups can be configured for a forwarding policy.
redirect_pools_sticky_session_config	RedirectPoolsStickySessionConfig object	Definition: Specifies whether to enable sticky session for backend server groups configured for a forwarding policy. The load balancer generates a cookie after it receives a request from a client. All subsequent requests with the same cookie are routed to the same backend server group.
redirect_pools_extend_config	RedirectPoolsExtendConfig object	Definition: Specifies the backend server group that requests are forwarded to. Constraints: This parameter takes effect only when action is set to REDIRECT_TO_POOL.
fixed_response_config	FixtedResponseConfig object	Definition: Specifies the configuration of the page that will be returned. Constraints: This parameter takes effect only when enhance_l7policy_enable is set to true. If this parameter is passed and enhance_l7policy_enable is set to false, an error will be returned. This parameter is mandatory when action is set to FIXED_RESPONSE. It cannot be specified if action is set to other values.
created_at	String	Definition: Specifies the creation time. Range: The value must be a UTC time in the yyyy-MM-dd'T'HH:mm:ss'Z' format.
updated_at	String	Definition: Specifies the update time. Range: The value must be a UTC time in the yyyy-MM-dd'T'HH:mm:ss'Z' format.
enterprise_project_id	String	Definition: Specifies the enterprise project ID.

**Table 5** RuleRef
Parameter	Type	Description
id	String	Definition: Specifies the forwarding rule ID.

**Table 6** RedirectUrlConfig
Parameter	Type	Description
protocol	String	Definition: Specifies the protocol for redirection. Range: HTTP HTTPS ${protocol}: indicates that the protocol in the request will be used.
host	String	Definition: Specifies the name of the host that requests are redirected to. Range: The value can contain only letters, digits, hyphens (-), and periods (.) and must start with a letter or digit. Default value: ${host}, indicating that the host in the request will be used.
port	String	Definition: Specifies the port that requests are redirected to. Default value: ${port}, indicating that the port in the request will be used.
path	String	Definition: Specifies the path that requests are redirected to. Range: The value can contain only letters, digits, and special characters: _~';@^-%#&$.+?,=!:\|\/()[]{} and must start with a slash (/). Default value: ${path}*, indicating that the path in the request will be used.
query	String	Definition: Specifies the query string set in the URL for redirection. The following is an example: In the URL https://www.example.com:8080/elb?type=loadbalancer, if this parameter is set to ${query}&name=my_name, the URL will be redirected to https://www.example.com:8080/elb?type=loadbalancer&name=my_name. In the example, ${query} indicates type=loadbalancer. Range: The value can contain only letters, digits, and the special characters: !$&'()+,-./:;=?@^_`. The letters are case-sensitive. $1, $2, $3, and all the way to $9 match the wildcard asterisk () in the requested URL. Default value: ${query}, indicating that the query string in the request will be used.
status_code	String	Definition: Specifies the status code returned after the requests are redirected. Range: 301 302 303 307 308

**Table 7** RedirectPoolsConfig
Parameter	Type	Description
pool_id	String	Definition: Specifies the backend server group ID.
weight	Integer	Definition: Specifies the weight of the backend server group. Requests are routed to backend server groups based on their weights. The larger the weight is, the higher proportion of requests the backend server group receives. If the weight is set to 0, the backend server group will not accept new requests. Range: 0 to 100

**Table 8** RedirectPoolsStickySessionConfig
Parameter	Type	Description
enable	Boolean	Definition: Specifies whether to enable sticky session for backend server groups configured in a forwarding policy. Default value: false, indicating that sticky session is disabled.
timeout	Integer	Definition: Specifies the stickiness duration, in minutes. Range: 1 to 1440, in minutes Default value: 1440

**Table 9** RedirectPoolsExtendConfig
Parameter	Type	Description
rewrite_url_enable	Boolean	Definition: Specifies whether to set rewrite_url_enable to true.
rewrite_url_config	RewriteUrlConfig object	Definition: Specifies the URL for the backend server group that requests are forwarded to. Constraints: This parameter takes effect only when action is set to REDIRECT_TO_POOL.

**Table 10** RewriteUrlConfig
Parameter	Type	Description
host	String	Definition: Specifies the domain name of the host that requests are redirected to. Range: The value can contain letters, digits, hyphens (-), and periods (.), and must start with a letter or digit. Default value: ${host}, indicating that the host in the request will be used.
path	String	Definition: Specifies the path that requests are redirected to. $1, $2, $3, and all the way to $9 match the wildcard asterisk () in the request URL. If the number of regular expression match groups is less than the specified number, ${path}* is empty. If the dollar sign ($) is followed by a letter, the matching result is empty until the next special character appears, for example, $abc#123, and the matching result is #123. If the dollar sign ($) is followed by a special character, for example, $#, the matching result is $#. Range: The value must start with a slash (/) and can contain only letters, digits, and special characters: _~';@^-%#&$.+?,=!:\|/() Default value: ${path}, indicating that the path in the request will be used.
query	String	Definition: Specifies the query string set in the URL for redirection. $1, $2, $3, and all the way to $9 match the wildcard asterisk () in the request URL. If the number of regular expression match groups is less than the specified number, ${path}* is empty. If the dollar sign ($) is followed by a letter, the matching result is empty until the next special character appears, for example, $abc#123, and the matching result is #123. If the dollar sign ($) is followed by a special character, for example, $#, the matching result is $#. Range: The value can contain only letters, digits, and the special characters: !$&'()+,-./:;=?@^_`. The letters are case-sensitive. Default value: ${query}, indicating that the query string in the request will be used.

**Table 11** FixtedResponseConfig
Parameter	Type	Description
status_code	String	Definition: Specifies the HTTP status code. The value can be any integer in the range of 200–299, 400–499, or 500–599.
content_type	String	Definition: Specifies the format of the returned body. Range: text/plain text/css text/html application/javascript application/json
message_body	String	Definition: Specifies the content of the response message body.

Example Requests

Querying the details of a forwarding policy

GET https://{ELB_Endpoint}/v3/99a3fff0d03c428eac3678da6a7d0f24/elb/l7policies/cf4360fd-8631-41ff-a6f5-b72c35da74be

Example Responses

Status code: 200

Successful request.

{
  "l7policy" : {
    "redirect_pool_id" : "768e9e8c-e7cb-4fef-b24b-af9399dbb240",
    "description" : "",
    "admin_state_up" : true,
    "rules" : [ {
      "id" : "c5c2d625-676b-431e-a4c7-c59cc2664881"
    } ],
    "project_id" : "7a9941d34fc1497d8d0797429ecfd354",
    "listener_id" : "cdb03a19-16b7-4e6b-bfec-047aeec74f56",
    "redirect_url" : null,
    "redirect_url_config" : null,
    "redirect_pools_config" : {
      "pool_id" : "722e9e8c-e7cb-4fef-b24b-af9399dbb240",
      "weight" : 12
    },
    "redirect_pools_sticky_session_config" : {
      "timeout" : 23,
      "enable" : false
    },
    "fixed_response_config" : {
      "content_type" : "text/plain",
      "message_body" : "",
      "status_code" : "207"
    },
    "redirect_listener_id" : null,
    "action" : "REDIRECT_TO_POOL",
    "position" : 100,
    "priority" : 1,
    "provisioning_status" : "ACTIVE",
    "id" : "01832d99-bbd8-4340-9d0c-6ff8f7a37307",
    "name" : "l7policy-67"
  },
  "request_id" : "6be83ec4-623e-4840-a417-2fcdf8ad5dfa"
}

Status Codes

Status Code	Description
200	Successful request.

Error Codes

See Error Codes.

Querying the Details of a Forwarding Policy