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Identity Manager 8.2.1 - API Development Guide

Basic principles of API development Examples and help – Software Development Kit API configuration Implementing your own APIs API Designer Quick start – Creating an API with the API Designer Working with the API Designer
Starting the API Designer Project types User interface Global settings Database objects Labeling changes Find and replace Multilingual captions Managing database queries Managing tabs Managing layouts Displaying the change history (command list) Bookmarks Compiling an API Managing versions (compilation branches) Testing an API Linking C# projects to the API Designer
API projects API methods ImxClient command line program

Encryption

The API Server stores data securely encrypted on the client and in the database.

The certificate is configured when the API server is installed on the IIS.

Related topics

General notes on programming your own API methods

  • Because the API Server is stateless, save the API methods that you specify in API files, without a client specific state.
    For example, you cannot, therefore, define global variables or store session object status data. When the API Server processes are restarted, these values are not restored.

  • Access to current HTTP requirements over ASP.NET APIs is not supported.

  • After enabling routes, you cannot change the definition objects anymore.

  • Use asynchronous code for defining API methods. This supports more efficient usage of server resources and improves performance of the system under load. The methods of the API and the underlying object model convert this asynchronousity using the Task-based Asynchronous Pattern (TAP). For more information about TAP, see https://docs.microsoft.com/de-de/dotnet/standard/asynchronous-programming-patterns/task-based-asynchronous-pattern-tap.

  • Do not use the HttpContext.Current method when you define API methods. You can query the current HTTP requirements with the QBM.CompositionApi.ApiManager.Context.Current static method.

  • If you define API methods that modify data, do NOT use the GET method.

Guidelines and conventions

In this chapter, you will find general policies and conventions, which you must take into account when you create an API.

Detailed information about this topic

Handling of API Server queries

In this section, you will find information about handling queries that are sent to the API Server.

Authentication

When a query is sent to the API Server, there is a test to ascertain the success of the primary and, possibly, secondary login in the session for the current project (see Authentication).

NOTE: This test is not done if the API method used by the query is marked as AllowUnauthenticated.

The imx-session-<API project name> cookie is evaluated to allocate the current session.

If a cookie is passed that cannot be associated with an active session in the current process, the security token in the cookie is used to set up a new session (see Session status and security tokens).

If there is no primary login, the API Server tries to establish a database connection through one of the enabled single sign-on authentication modules.

If login cannot be carried out, the process is canceled and the HTTP error code 500 is passed to the client (see Response codes).

Authorizing method access

The API Server checks whether the currently logged in user is authorized to run the method. If the user does not have the required permissions, the process is canceled and the HTTP error code 500 is passed to the client (see Response codes).

Validating the query

The API Server calls the validators stored with the API method one by one. If one fails, the process is canceled and the HTTP error code 400 is passed to the client (see Response codes).

Processing queries (for entity methods)
  • GET (for loading entities)
    • Determines the WHERE clause with internal and external filters

    • Loads data from the database

    • Enriches entities with calculated columns

  • Entities in delayed logic mode can be changed with a POST query or deleted with a DELETE query. Entities in this mode are stateless and do not occupy resources on the server after the query has been processed.
    Supported HTTP methods:

    • GET (for loading entities)

    • POST (for changing entities)

    • DELETE (for deleting entities)

  • Interactive entities must be created once with a PUT query and after that they obtain their own ID. Use the ID in subsequent queries (POST or DELETE).

    Supported HTTP methods:

    • PUT (for creating interactive entities)

    • POST (for changing interactive entities)

    • DELETE (for deleting interactive entities)

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