HTTP

The HTTP connector provides connectivity to HTTP service and consume HTTP based APIs. The connector also supports SSL/TLS connectivity through custom configuration and supports various authentication mechanisms like OAuth 2.0 Client Credentials Grant, Basic, and Digest.

Before you begin

Before using the HTTP connector, do the following tasks:

• In your Google Cloud project:
  • Ensure that network connectivity is set up. For information about network patterns, see Network connectivity.
  • Grant the roles/connectors.admin IAM role to the user configuring the connector.
  • Grant the following IAM roles to the service account that you want to use for the connector:
    • roles/secretmanager.viewer
    • roles/secretmanager.secretAccessor

    A service account is a special type of Google account intended to represent a non-human user that needs to authenticate and be authorized to access data in Google APIs. If you don't have a service account, you must create a service account. For more information, see Creating a service account.

  • Enable the following services:
    • secretmanager.googleapis.com (Secret Manager API)
    • connectors.googleapis.com (Connectors API)

    To understand how to enable services, see Enabling services.

  If these services or permissions have not been enabled for your project previously, you are prompted to enable them when configuring the connector.

Configure the connector

Configuring the connector requires you to create a connection to your data source (backend system). A connection is specific to a data source. It means that if you have many data sources, you must create a separate connection for each data source. To create a connection, do the following steps:

1. In the Cloud console, go to the Integration Connectors > Connections page and then select or create a Google Cloud project.

   Go to the Connections page

2. Click + Create New to open the Create Connection page.
3. In the Location section, choose the location for the connection.
   1. Region: Select a location from the drop-down list.

      For the list of all the supported regions, see Locations.

   2. Click Next.
4. In the Connection Details section, complete the following:
   1. Connector: Select HTTP from the drop down list of available Connectors.
   2. Connector version: Select the Connector version from the drop down list of available versions.
   3. In the Connection Name field, enter a name for the Connection instance.

      Connection names must meet the following criteria:

      • Connection names can use letters, numbers, or hyphens.
      • Letters must be lower-case.
      • Connection names must begin with a letter and end with a letter or number.
      • Connection names cannot exceed 49 characters.
   4. Optionally, enter a Description for the connection instance.
   5. Optionally, enable Cloud logging, and then select a log level. By default, the log level is set to Error.
   6. Service Account: Select a service account that has the required roles.
   7. Optionally, to check the status of the connection, in the Status Check field, specify an endpoint URL. The URL can also include an endpoint attachment IP address. The status is active by default.
   8. Optionally, configure the Connection node settings:
      • Minimum number of nodes: Enter the minimum number of connection nodes.
      • Maximum number of nodes: Enter the maximum number of connection nodes.

      A node is a unit (or replica) of a connection that processes transactions. More nodes are required to process more transactions for a connection and conversely, fewer nodes are required to process fewer transactions. To understand how the nodes affect your connector pricing, see Pricing for connection nodes. If you don't enter any values, by default the minimum nodes are set to 2 (for better availability) and the maximum nodes are set to 50.

   9. Use proxy: Select the checkbox to configure a proxy server for the connection.
      1. Click + Add destination.
      2. Select a Destination Type.
         • Host address: Specify the hostname or IP address of the destination.

           If you want to establish private connection to your backend, do the following:

           • Create a PSC service attachment.
           • Create an endpoint attachment and then enter the details of the endpoint attachment in the Host address field.
   10. Optionally, click + ADD LABEL to add a label to the Connection in the form of a key/value pair.
   11. Optionally, if you want to use SSL, select Enable SSL. This displays the SSL configuration details.
       1. Select a trust store type. It can be either Public, Private, or Insecure Connection.
       2. Select the certificates as displayed based on your trust store selection.
       3. If you are using mTLS, select the key store certificates in the Key Store section.
       4. Optionally, select the TLS version.
       5. Enter the supported cipher suite. Enter multiple cipher suites, as comma separated values. For more information, see Supported cipher suites.
   12. Click Next.
5. In the Destinations section, enter details of the remote host (backend system) you want to connect to.
   1. Destination Type: Select a Destination Type.
      • Select Host address from the list to specify the hostname or IP address of the destination.
      • If you want to establish a private connection to your backend systems, select Endpoint attachment from the list, and then select the required endpoint attachment from the Endpoint Attachment list.

      If you want to establish a public connection to your backend systems with additional security, you can consider configuring static outbound IP addresses for your connections, and then configure your firewall rules to allowlist only the specific static IP addresses.

      To enter additional destinations, click + Add destination.

   2. Click Next.
6. In the Authentication section, enter the authentication details.
   1. Select an Authentication type and enter the relevant details.

      The following authentication types are supported by the HTTP connection:

      • Custom Authentication
      • OAuth 2.0 - Client credentials grant
      • Basic Authentication
      • Digest Authentication
      • OAuth 2.0 - Authorization code
      • Service account
      • Service account ID token authentication
      • API key authentication

   To understand how to configure these authentication types, see Configure authentication.

   2. Click Next.
7. Review: Review your connection and authentication details.
8. Click Create.

Additional steps after connection creation

If you selected OAuth 2.0 - Authorization code for authentication, you must do the following additional steps after creating the connection:

1. In the Connections page, locate the newly created connection.

   Notice that the Status for the new connector will be Authorization required.

2. Click Authorization required.

   This shows the Edit authorization pane.

3. Copy the Redirect URI value to your external application.
4. Verify the authorization details.
5. Click Authorize.

   If the authorization is successful, the connection status will be set to Active in the Connections page.

Re-authorization for Authorization code

If you are using Authorization code authentication type and have made any cofiguration changes in your backend HTTP application, you must re-authorize your HTTP connection. To re-authorize a connection, perform the following steps:

1. Click on the required connection in the Connections page.

   This opens the connection details page.

2. Click Edit to edit the connection details.
3. Verify the OAuth 2.0 - Authorization code details in the Authentication section.

   If required, make the necessary changes.

4. Click Save. This takes you to the connection details page.
5. Click Edit authorization in the Authentication section. This shows the Authorize pane.
6. Click Authorize.

   If the authorization is successful, the connection status will be set to Active in the Connections page.

System limitations

The HTTP connector can process 100 transaction per second, per node, and throttles any transactions beyond this limit. By default, Integration Connectors allocates 2 nodes (for better availability) for a connection.

For information on the limits applicable to Integration Connectors, see Limits.

[{
"ResponseBody": "{\n \"status\": 200\n}"
}, {
"StatusCode": 200.0
}, {
"HttpVersion": "2"
}, {
"ResponseHeaders": {
":status": "200",
"content-length": "19"
}
}]

[{
"ResponseBody": "{\n \"status\": 200\n}",
"StatusCode": 200.0,
"HttpVersion": "2",
"ResponseHeaders": {
":status": "200",
"content-length": "19"
}
}]

{
  "error": {
    "code": 400,
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "metadata": {
          "Body": "{\"thisIsResponseJSON\":\"someValue\"}"
          "Error": "Error response received from the HTTP server",
          "Headers": "{\":status\":[\"400\"], \"access-control-allow-credentials\":[\"true\"]}",
          "StatusCode": "400",
          "connection_type": "Http"
        }
      }
    ],
    "message": "Unable to execute HTTP Request",
    "status": "FAILED_PRECONDITION"
  }
}

Use terraform to create connections

To learn how to apply or remove a Terraform configuration, see Basic Terraform commands.

To view a sample terraform template for connection creation, see sample template.

When creating this connection by using Terraform, you must set the following variables in your Terraform configuration file:

Get help from the Google Cloud community

What's next

• Understand how to suspend and resume a connection.
• Understand how to monitor connector usage.
• Understand how to view connector logs.