Method: echo

Echos back the clientMessage passed in.

The purpose of this method is to test basic connectivity between the payment integrator and Google.

Responses to this query may be empty if this method does not return an HTTP 200. They are empty in situations where an ErrorResponse with a clear description could be used to help an attacker understand the payment integrator account identifier of other integrators. In these situations, where either the signing key doesn't match, the payment integrator identifier was not found, or the encryption key was unknown, this method will return a HTTP 404 with an empty body.

An example request looks like:


{
  "requestHeader": {
    "protocolVersion": {
      "major": 1,
      "minor": 0,
      "revision": 0
    },
    "requestId": "ZWNobyB0cmFuc2FjdGlvbg",
    "requestTimestamp": "1481899949606"
  },
  "clientMessage": "client message"
}

An example response looks like:


{
  "responseHeader": {
    "responseTimestamp": "1481900013178"
  },
  "clientMessage": "client message",
  "serverMessage": "server message"
}

HTTP request

POST https://billpaynotification.googleapis.com/secure-serving/gsp/v1/echo

Request body

The request body contains data with the following structure:

JSON representation
{
  "requestHeader": {
    object (RequestHeader)
  },
  "clientMessage": string
}
Fields
requestHeader

object (RequestHeader)

REQUIRED: Common header for all requests.

clientMessage

string

REQUIRED: Message to echo in the response.

Response body

If successful, the response body contains data with the following structure:

Response object for the echo method.

JSON representation
{
  "responseHeader": {
    object (ResponseHeader)
  },
  "clientMessage": string,
  "serverMessage": string
}
Fields
responseHeader

object (ResponseHeader)

REQUIRED: Common header for all responses.

clientMessage

string

REQUIRED: Message received in the request.

serverMessage

string

OPTIONAL: Server message, independent of the clientMessage being echoed.

RequestHeader

Header object that is defined on all requests sent to the server.

JSON representation
{
  "requestId": string,
  "requestTimestamp": string,
  "userLocale": string,
  "protocolVersion": {
    object (Version)
  }
}
Fields
requestId

string

REQUIRED: Unique identifier of this request.

This is a string that has a max length of 100 characters, and contains only the characters "a-z", "A-Z", "0-9", ":", "-", and "_".

requestTimestamp

string (int64 format)

REQUIRED: Timestamp of this request represented as milliseconds since epoch. The receiver should verify that this timestamp is ± 60s of 'now'. This request timestamp is not idempotent upon retries.

userLocale
(deprecated)

string

OPTIONAL: A two- or three-letter ISO 639-2 Alpha 3 language code optionally followed by a hyphen and an ISO 3166-1 Alpha-2 country code, e.g.'pt', 'pt-BR', 'fil', or 'fil-PH'. Use this to help drive the user_message fields in the response.

protocolVersion

object (Version)

REQUIRED: The version of this request.

Version

Version object which is a structured form of the classic a.b.c version structure. Major versions of the same number are guaranteed to be compatible. Note that minor and revisions can change frequently and without notice. The integrator must support all requests for the same major version.

JSON representation
{
  "major": integer,
  "minor": integer,
  "revision": integer
}
Fields
major

integer

REQUIRED: Major version. This is marked for compatibility requests with different versions are not guaranteed to be compatible.

minor

integer

REQUIRED: Minor version. This denotes significant bug fixes.

revision

integer

REQUIRED: Minor version. This denotes minor bug fixes.

ResponseHeader

Header object that is defined on all responses sent from the server.

JSON representation
{
  "responseTimestamp": string
}
Fields
responseTimestamp

string (int64 format)

REQUIRED: Timestamp of this response represented as milliseconds since epoch. The receiver should verify that this timestamp is ± 60s of 'now'.