StaticRequestFilter

Creates a new request, replacing any existing request. The request can include an entity specified in the entity parameter. Alternatively, the request can include a form, specified in the form parameter, which is included in an entity encoded in application/x-www-form-urlencoded format if request method is POST, or otherwise as (additional) query parameters in the URI. The form and entity parameters cannot be used together when the method is set to POST.

Usage

{
     "name": string,
     "type": "StaticRequestFilter",
     "config": {
         "method": string,
         "uri": runtime expression<uri string>,
         "version": string,
         "headers": {
             configuration expression<string>: [ runtime expression<string>, ... ], ...
         },
         "form": {
             configuration expression<string>: [ runtime expression<string>, ... ], ...
         },
         "entity": runtime expression<string>
     }
}

Properties

"method": string, required

The HTTP method to be performed on the resource (for example, "GET").

"uri": runtime expression<uri string>, required

The fully-qualified URI of the resource to access (for example, "http://www.example.com/resource.txt").

The result of the expression must be a string that represents a valid URI, but is not a real java.net.URI object. For example, it would be incorrect to use ${request.uri}, which is not a String but a MutableUri.

"version": string, optional

Protocol version. Default: "HTTP/1.1".

"headers": object, optional

Header fields to set in the request, with the format name: [ value, ... ].

The name field of headers specifies the header name. It can be defined by a configuration expression or string. If the configuration expressions for multiple name resolve to the same final string, multiple values are associated with the name.

The value field of headers is an array of runtime expressions to evaluate as header values.

In the following example, the name of the header is the value of the configuration time, system variable defined in cookieHeaderName. The value of the header is the runtime value stored in contexts.ssoToken.value: 

"headers": {
  "${application['header1Name']}": [
    "${application['header1Value'}"
  ]

"form": object, optional

A form to include in the request, with the format param: [ value, ... ].

The param field of form specifies the name of the form parameter. It can be defined by a configuration expression or string. If the configuration expressions for multiple param resolve to the same final string, multiple values are associated with the param.

The value field of form is an array of runtime expressions to evaluate as form field values.

When the method is set to POST, this setting is mutually exclusive with the entity setting.

In the following example, the names of the field parameters and the values are hardcoded in the form: 

"form": {
  "username": [
    "demo"
  ],
  "password": [
    "Ch4ng31t"
  ]

In the following example, the names of the field parameters are hardcoded. The values take the first value of username and password provided in the session: 

"form": {
  "username": [
    "${session.username[0]}"
  ],
  "password": [
    "${session.password[0]}"
  ]

In the following example, the name of the first field param take the value of the expression ${application['formName']} when it is evaluated at startup. The values take the first value of username and password provided in the session: 

"form": {
  "${application['formName']}": [
    "${session.username[0]}"
  ],
  "${application['formPassword']}": [
    "${session.password[0]}"
  ]

"entity": runtime expression<string>, optional

The entity body to include in the request.

This setting is mutually exclusive with the form setting when the method is set to POST.

See also "Expressions".

Example

In the following example, IG replaces the browser's original HTTP GET request with an HTTP POST login request containing credentials to authenticate to the sample application. For information about how to set up and test this example, see Getting Started Guide. 

{
  "handler": {
    "type": "Chain",
    "config": {
      "filters": [
        {
          "type": "StaticRequestFilter",
          "config": {
            "method": "POST",
            "uri": "http://app.example.com:8081/login",
            "form": {
              "username": [
                "demo"
              ],
              "password": [
                "Ch4ng31t"
              ]
            }
          }
        }
      ],
      "handler": "ReverseProxyHandler"
    }
  },
  "condition": "${matches(request.uri.path, '^/static')}"
}
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