8 Service APIs
This section provides a reference for APIs that should be implemented by this Building Block.
The GovStack non-functional requirements document provides additional information on how 'adaptors' may be used to translate an existing API to the patterns described here. This section also provides guidance on how candidate products are tested and how GovStack validates a product's API against the API specifications defined here.
The tests for the Information Mediator Building Block can be found in this GitHub repository.
The majority of functions provided by the Information Mediator Building Block are either defined in the “service access flow” or configured by the administrator via the web User Interface. There is, however, a “Directory Service” which can provide listings of clients, methods, and available API specifications for services on the Information Mediator. The directory is managed by admins of members. The directory service centralizes and offers knowledge of all enrolled members and their services along with the information necessary to bind a third-party application as a consumer of that service. These services are described here:
and changes to the API definitions can be made by submitting a pull request on this repository. Additional APIs may be implemented by the Building Block, but the listed APIs define a minimal set of functionality that should be provided by any implementation of this Building Block.
The services can be accessed via the following Service APIs:
8.1 Service Access
The full API definition of all available services is the set of all available OpenAPI descriptions.
One can take any of the available OpenAPI descriptions and call service according to that description.
This call must be forwarded to IM local Security Server and path part of the called URL must begin with the address of service in the form /r1/{instanceId}/{memberClass}/{member}/{application}/{service}/ followed by the service path with possible query parameters. The address of the service may be already listed in the OpenAPI description or must be added to the path if not provided by OpenAPI.
8.2 Directory Services
8.2.1 Member Discovery
At development time, to see which organizations are available on GovStack, an administrator of application A sends a GET request to the security server: url-of-local-information-mediator-security-server/r1/listClients
The response is an array of organizations with descriptions. API MAY implement paging of output.
Clients of the security server have the capability to obtain a list
of potential service providers within a GovStack instance, including
both members and applications.
To do so, they should initiate an HTTP GET request to the security
server.
The specific request URL will be either http://SECURITYSERVER/listClients
or https://SECURITYSERVER/listClients, depending on whether HTTPS
protocol usage is enabled for interaction.
When submitting this request, the placeholder SECURITYSERVER must be
replased with the actual address of the security server. One can also
retrieve a list of clients from other federated GovStack instances
by adding an additional HTTP parameter:
instanceId - a code of the instance.
For instance, if you wish to fetch the list of clients associated with the
instance labeled as ABC, your request URL should take the form of
http://SECURITYSERVER/listClients?instanceId=ABC.
List of Clients of GovStack
Error in request
Internal error
GET /listClients HTTP/1.1
Host:
Accept: */*
{
"member": [
{
"name": "text",
"id": {
"objectType": "MEMBER",
"instanceId": "text",
"memberClass": "text",
"memberCode": "text",
"applicationCode": "text"
}
}
]
}8.2.2 Service Discovery
At development time, an administrator at application A sends a GET request to the security server: url-of-local-information-mediator-security-server/r1/INDIA/GOV/MEMBER/APPLICATION/{listMethods || allowedMethods}
The response is an array of services (either all services or services that the requester is authorized to access via “allowedMethods”). API MAY implement paging of output.
This function provides a list of all REST services and service endpoints offered by a service provider.
List of REST services and endpoints for a service provider
Error in request
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/listMethods HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"member": [
{
"objectType": "MEMBER",
"serviceType": "text",
"instanceId": "text",
"memberClass": "text",
"memberCode": "text",
"applicationCode": "text",
"serviceCode": "text",
"serviceVersion": "text",
"endpointList": {
"member": [
{
"method": "text",
"path": "text"
}
]
}
}
]
}This function provides a list of REST services and service endpoints offered by a service provider that the caller has permission to invoke.
List of allowed REST services and endpoints for a service provider
Error in request
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/allowedMethods HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"member": [
{
"objectType": "MEMBER",
"serviceType": "text",
"instanceId": "text",
"memberClass": "text",
"memberCode": "text",
"applicationCode": "text",
"serviceCode": "text",
"serviceVersion": "text",
"endpointList": {
"member": [
{
"method": "text",
"path": "text"
}
]
}
}
]
}At development time, to learn about an available service, an administrator at application A sends a GET request to the security server: url-of-local-information-mediator-security-server/r1/INDIA/GOV/MEMBER/APPLICATION/getOpenApi?serviceCode=SERVICE
The response is an OpenAPI specification, detailing the endpoints and requirements for that service/API of the requested Service of Application.
This metaservice is designed to retrieve service descriptions for
REST services.
It provides the OpenAPI service description for a specific REST service.
To use this service, the query parameters should include serviceCode=xxx,
where xxx corresponds to the service code of the particular REST service
for which you desire to obtain the service description.
OpenAPI description of the specified REST service
Error in request
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/getOpenAPI?serviceCode=text HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
text8.3 Pub/Sub Service
To broadcast a message to a Room, the service access API must be followed and the service requested must be the service implementing event type.
8.3.1 Subscriber API
Return list of my subscriptions in the room {applicationCode}
List of my subscriptions
Subscription missing
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/subs HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
[
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"subscriberId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capitalCity",
"applicationCode": "police"
},
"eventType": "newBirth",
"delivery": "PUSH",
"options": {
"TTL": 3600,
"FIFO": false
}
}
]Subscribe caller to {eventType} in the room {applicationCode}
newBirthPUSHPossible values: Subscription created
No content
Invalid request
Subscription already exists
Internal error
POST /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/subs/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Content-Type: application/json
Accept: */*
Content-Length: 238
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"subscriberId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capitalCity",
"applicationCode": "police"
},
"eventType": "newBirth",
"delivery": "PUSH",
"options": {
"TTL": 3600,
"FIFO": false
}
}No content
Return details of subscription to {eventType} in the room {applicationCode}
Subscription details
Subscription missing
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/subs/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"subscriberId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capitalCity",
"applicationCode": "police"
},
"eventType": "newBirth",
"delivery": "PUSH",
"options": {
"TTL": 3600,
"FIFO": false
}
}Update details of subscription to {eventType} in the room {applicationCode}
newBirthPUSHPossible values: Subscription details
No content
Invalid request
Subscription missing
Internal error
PATCH /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/subs/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Content-Type: application/json
Accept: */*
Content-Length: 238
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"subscriberId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capitalCity",
"applicationCode": "police"
},
"eventType": "newBirth",
"delivery": "PUSH",
"options": {
"TTL": 3600,
"FIFO": false
}
}No content
Unsubscribe
Subscription deleted
No content
Subscription missing
Internal error
DELETE /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/subs/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
No content
8.3.2 PULL delivery mode API
Return next unacknowledged event of type defined by {eventType} and located in the room {applicationCode}
Event
No event available
Invalid request
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/pull/v1/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"sequence": 42,
"publisherId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capital-city",
"applicationCode": "police"
},
"eventType": "newBirth",
"event": {
"dateTime": "2023-05-01T11:25:00+02:00",
"gender": "M",
"mother": "Jane Doe",
"place": "City Hospital",
"details": {
"weight": 3200,
"length": 49,
"eyesColor": "brown"
}
}
}Acknowledge receiving of event from the room {applicationCode}
event id
Event acknowledged
No content
no event available
invalid request
DELETE /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/pull/v1/{eventType}/{eventId} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
No content
8.3.3 Publisher API
Publish event in the room {applicationCode}
newBirth{"dateTime":"2023-05-01T11:25:00+02:00","gender":"M","mother":"Jane Doe","place":"City Hospital","details":{"weight":3200,"length":49,"eyesColor":"brown"}}Event accepted for publishing. Returning event id
Invalid request
Unknown event type
Internal error
POST /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/pub/v1/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Content-Type: application/json
Accept: */*
Content-Length: 188
{
"eventType": "newBirth",
"event": {
"dateTime": "2023-05-01T11:25:00+02:00",
"gender": "M",
"mother": "Jane Doe",
"place": "City Hospital",
"details": {
"weight": 3200,
"length": 49,
"eyesColor": "brown"
}
}
}{
"id": "123e4567-e89b-12d3-a456-426614174000"
}Return event status info. Event is located in the room {applicationCode}
event id of event
Event status
Event missing
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/pub/v1/{eventType}/{eventId} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"id": "123e4567-e89b-12d3-a456-426614174000",
"sequence": 42,
"publisherId": {
"instanceId": "neverland",
"memberClass": "GOV",
"memberCode": "capital-city",
"applicationCode": "police"
},
"eventType": "newBirth",
"event": {
"dateTime": "2023-05-01T11:25:00+02:00",
"gender": "M",
"mother": "Jane Doe",
"place": "City Hospital",
"details": {
"weight": 3200,
"length": 49,
"eyesColor": "brown"
}
}
}Stop processing of the event. Event is located in the room {applicationId}
event id of event
Event processing stopped
No content
Event missing
Internal error
DELETE /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/pub/v1/{eventType}/{eventId} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
No content
8.3.4 Event Type API
Create new event type in the room {applicationCode}
newBirth{ "$schema": "http://json-schema.org/draft-07/schema#", "type": "object", "properties": { "dateTime": { "type": "string", "format": "date-time" }, "gender": { "type": "string", "enum": ["M", "F"] }, "mother": { "type": "string" }, "place": { "type": "string" }, "id": { "type": "integer" }, "details": { "type": "object", "properties": { "weight": { "type": "number" }, "length": { "type": "number" }, "eyesColor": { "type": "string" } }, "required": ["weight", "length", "eyesColor"] } }, "required": ["dateTime", "gender", "mother", "place"] }Event type created
No content
Invalid request
Event type already exists
Internal error
POST /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/eventType HTTP/1.1
Host:
X-GovStack-Client: text
Content-Type: application/json
Accept: */*
Content-Length: 864
{
"eventType": "newBirth",
"schema": "{ \"$schema\": \"http://json-schema.org/draft-07/schema#\", \"type\": \"object\", \"properties\": {\n \"dateTime\": {\n \"type\": \"string\",\n \"format\": \"date-time\"\n },\n \"gender\": {\n \"type\": \"string\",\n \"enum\": [\"M\", \"F\"]\n },\n \"mother\": {\n \"type\": \"string\"\n },\n \"place\": {\n \"type\": \"string\"\n },\n \"id\": {\n \"type\": \"integer\"\n },\n \"details\": {\n \"type\": \"object\",\n \"properties\": {\n \"weight\": {\n \"type\": \"number\"\n },\n \"length\": {\n \"type\": \"number\"\n },\n \"eyesColor\": {\n \"type\": \"string\"\n }\n },\n \"required\": [\"weight\", \"length\", \"eyesColor\"]\n }\n}, \"required\": [\"dateTime\", \"gender\", \"mother\", \"place\"] }"
}No content
Return list of event types located in the room {applicationCode}
Event type list
Event types does not defined
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/eventType HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
[
"newBirth"
]Return event type description. Event type is located in the room {applicationCode}
Event type details
Event type does not defined
Internal error
GET /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/eventType/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
{
"eventType": "newBirth",
"schema": "{ \"$schema\": \"http://json-schema.org/draft-07/schema#\", \"type\": \"object\", \"properties\": {\n \"dateTime\": {\n \"type\": \"string\",\n \"format\": \"date-time\"\n },\n \"gender\": {\n \"type\": \"string\",\n \"enum\": [\"M\", \"F\"]\n },\n \"mother\": {\n \"type\": \"string\"\n },\n \"place\": {\n \"type\": \"string\"\n },\n \"id\": {\n \"type\": \"integer\"\n },\n \"details\": {\n \"type\": \"object\",\n \"properties\": {\n \"weight\": {\n \"type\": \"number\"\n },\n \"length\": {\n \"type\": \"number\"\n },\n \"eyesColor\": {\n \"type\": \"string\"\n }\n },\n \"required\": [\"weight\", \"length\", \"eyesColor\"]\n }\n}, \"required\": [\"dateTime\", \"gender\", \"mother\", \"place\"] }"
}Delete event type in the room {applicationId}
Event type deleted
No content
Event type missing
Internal error
DELETE /r1/{instanceId}/{memberClass}/{memberCode}/{applicationCode}/api/v1/eventType/{eventType} HTTP/1.1
Host:
X-GovStack-Client: text
Accept: */*
No content
8.4 Logging Services
To get info from system log, an administrator may send a request to the logging API.
8.5 Monitoring Services
At the debugging time, to learn about system performance or retrieve an audit log, an administrator may send a request to the reporting API.
The response is <audit trail>, <metrics>, etc.
8.6 Management API
8.6.1 Configuration Management
Configuration description of IM is returned in form of file
List of IM configuration
Internal error
GET /api/v1/config HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Accept: */*
{
"domain": "sample.sandbox.govstack.global",
"instance": "nowhereland",
"members": [
{
"name": "Ministry of Interior",
"class": "GOV",
"code": "7001",
"applications": [
{
"id": "CitizensRegistry",
"connection": "http",
"services": [
{
"id": "registration",
"specUrl": "https://raw.githubusercontent.com/GovStackWorkingGroup/bb-example/api/registration.json",
"serviceUrl": "http://hostname.internal/api/v1/registration",
"rights": [
{
"member": "LocalMunicipality",
"application": "RegistrationPortal"
}
]
}
]
}
]
}
]
}Create new instance of IM
Creates Central Servers if init=true
falseSubdomain for GovStack instance to run in
sample.sandbox.govstack.globalName of GovStack instance
nowherelandIM starts configuration creation
Error in request
Internal error
POST /api/v1/config HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Content-Type: application/json
Accept: */*
Content-Length: 475
{
"domain": "sample.sandbox.govstack.global",
"instance": "nowhereland",
"members": [
{
"name": "Ministry of Interior",
"class": "GOV",
"code": "7001",
"applications": [
{
"id": "CitizensRegistry",
"connection": "http",
"services": [
{
"id": "registration",
"specUrl": "https://raw.githubusercontent.com/GovStackWorkingGroup/bb-example/api/registration.json",
"serviceUrl": "http://hostname.internal/api/v1/registration",
"rights": [
{
"member": "LocalMunicipality",
"application": "RegistrationPortal"
}
]
}
]
}
]
}
]
}textUpdate IM configuration. Not described parts are not changed
Subdomain for GovStack instance to run in
sample.sandbox.govstack.globalName of GovStack instance
nowherelandIM starts configuration update
Error in request
Internal error
PATCH /api/v1/config HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Content-Type: application/json
Accept: */*
Content-Length: 475
{
"domain": "sample.sandbox.govstack.global",
"instance": "nowhereland",
"members": [
{
"name": "Ministry of Interior",
"class": "GOV",
"code": "7001",
"applications": [
{
"id": "CitizensRegistry",
"connection": "http",
"services": [
{
"id": "registration",
"specUrl": "https://raw.githubusercontent.com/GovStackWorkingGroup/bb-example/api/registration.json",
"serviceUrl": "http://hostname.internal/api/v1/registration",
"rights": [
{
"member": "LocalMunicipality",
"application": "RegistrationPortal"
}
]
}
]
}
]
}
]
}textReplace IM configuration. Not described parts are deleted
Subdomain for GovStack instance to run in
sample.sandbox.govstack.globalName of GovStack instance
nowherelandIM starts configuration creation
Error in request
Internal error
PUT /api/v1/config HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Content-Type: application/json
Accept: */*
Content-Length: 475
{
"domain": "sample.sandbox.govstack.global",
"instance": "nowhereland",
"members": [
{
"name": "Ministry of Interior",
"class": "GOV",
"code": "7001",
"applications": [
{
"id": "CitizensRegistry",
"connection": "http",
"services": [
{
"id": "registration",
"specUrl": "https://raw.githubusercontent.com/GovStackWorkingGroup/bb-example/api/registration.json",
"serviceUrl": "http://hostname.internal/api/v1/registration",
"rights": [
{
"member": "LocalMunicipality",
"application": "RegistrationPortal"
}
]
}
]
}
]
}
]
}text8.6.2 Management of Access Rights
Filter by member class
Filter by member code
Filter by application ID
Filter by service ID
Number of access rights returned on one page
100Handle for the next page, if the result spans multiple pages. If not specified, there are no more results.
OK
Caller does not have permissions to view access rights
GET /api/v1/rights/allow HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Accept: */*
{
"nextPageToken": "text",
"allowList": [
{
"memberClass": "GOV",
"memberCode": "7001",
"applicationId": "CitizensRegistry",
"serviceId": "registration",
"rights": [
{
"memberClass": "text",
"memberCode": "text",
"applicationId": "text"
}
]
}
]
}Kind of organisation. Namespace for organisation {code}
GOVRegistration number (or identifier) of the organisation in {memberClass} namespace
7001Name of application
CitizensRegistryName of service/API
registrationOK
No content
Caller does not have the necessary permissions to update access rights
PATCH /api/v1/rights/allow HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Content-Type: application/json
Accept: */*
Content-Length: 182
[
{
"memberClass": "GOV",
"memberCode": "7001",
"applicationId": "CitizensRegistry",
"serviceId": "registration",
"rights": [
{
"memberClass": "text",
"memberCode": "text",
"applicationId": "text"
}
]
}
]No content
Kind of organisation. Namespace for organisation {code}
GOVRegistration number (or identifier) of the organisation in {memberClass} namespace
7001Name of application
CitizensRegistryName of service/API
registrationOK
No content
Caller does not have the necessary permissions to update access rights
PATCH /api/v1/rights/deny HTTP/1.1
Host:
Authorization: Bearer YOUR_OAUTH2_TOKEN
Content-Type: application/json
Accept: */*
Content-Length: 182
[
{
"memberClass": "GOV",
"memberCode": "7001",
"applicationId": "CitizensRegistry",
"serviceId": "registration",
"rights": [
{
"memberClass": "text",
"memberCode": "text",
"applicationId": "text"
}
]
}
]No content
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