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Edge Security Acceleration:GetHttpRequestHeaderModificationRule

Last Updated:Feb 11, 2026

Retrieves the details of an HTTP request header modification rule for a site.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

esa:GetHttpRequestHeaderModificationRule

get

*Site

acs:esa:{#regionId}:{#accountId}:site/{#SiteId}

None None

Request parameters

Parameter

Type

Required

Description

Example

SiteId

integer

Yes

The ID of the site. You can obtain this ID by calling the ListSites operation.

123456****

ConfigId

integer

Yes

The configuration ID. You can obtain this ID by calling the ListHttpRequestHeaderModificationRules operation.

3528160969****

Response elements

Element

Type

Description

Example

object

The response to the request.

RequestId

string

The request ID.

15C66C7B-671A-4297-9187-2C4477247A74

ConfigId

integer

The configuration ID.

3528160969****

ConfigType

string

The configuration type. Valid values:

  • global: A global configuration.

  • rule: A rule-based configuration.

global

SiteVersion

integer

The version number of the site configuration. For sites with version management enabled, this parameter specifies the site version to which the configuration applies. The default value is 0.

0

Sequence

integer

The execution order of the rule. Rules with smaller values are executed first.

1

RuleEnable

string

Specifies whether the rule is enabled. This parameter is not required for global configurations. Valid values:

  • on: The rule is enabled.

  • off: The rule is disabled.

on

Rule

string

The content of the rule, which uses a conditional expression to match user requests. This parameter is not required for global configurations. There are two scenarios:

  • To match all incoming requests, set the value to true.

  • To match specific requests, set the value to a custom expression, such as (http.host eq "video.example.com").

(http.host eq "video.example.com")

RuleName

string

The name of the rule. This parameter is not required for global configurations.

rule_example

RequestHeaderModification

array<object>

The request header modifications. The add, delete, and modify operations are supported.

object

The details of the request header modification.

Name

string

The name of the request header.

headerName

Operation

string

The operation to perform. Valid values:

  • add: Adds a header.

  • del: Deletes a header.

  • modify: Modifies a header.

add

Value

string

The value of the request header.

headValue

Type

string

The type of the value. Valid values:

  • static: A static value.

  • dynamic: A dynamic value.

static

Examples

Success response

JSON format

{
  "RequestId": "15C66C7B-671A-4297-9187-2C4477247A74",
  "ConfigId": 0,
  "ConfigType": "global",
  "SiteVersion": 0,
  "Sequence": 1,
  "RuleEnable": "on",
  "Rule": "(http.host eq \"video.example.com\")",
  "RuleName": "rule_example",
  "RequestHeaderModification": [
    {
      "Name": "headerName",
      "Operation": "add",
      "Value": "headValue",
      "Type": "static"
    }
  ]
}

Error codes

HTTP status code

Error code

Error message

Description

400 InternalException Failed to call the service. Try again later or contact technical support. Failed to call the service. Try again later or contact technical support.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.