Add metadata for bindings.azure.signalr (#2772)

Signed-off-by: ItalyPaleAle <43508+ItalyPaleAle@users.noreply.github.com>

bindings/azure/signalr/metadata.yaml

@@ -0,0 +1,79 @@
+# yaml-language-server: $schema=../../../component-metadata-schema.json
+schemaVersion: "v1"
+type: "bindings"
+name: "azure.signalr"
+version: "v1"
+status: "alpha"
+title: "Azure SignalR"
+urls:
+  - title: "Reference"
+    url: "https://docs.dapr.io/reference/components-reference/supported-bindings/signalr/"
+binding:
+  output: true
+  input: false
+  operations:
+    - name: "create"
+      description: "Send a message to SignalR"
+capabilities: []
+authenticationProfiles:
+  - title: "Connection string with access key"
+    description: "Authenticate using a connection string with an access key."
+    metadata:
+      - name: "connectionString"
+        required: true
+        sensitive: true
+        description: "The Azure SignalR connection string."
+        example: |
+          "Endpoint=https://<your-azure-signalr>.service.signalr.net;AccessKey=<your-access-key>;Version=1.0;"
+      - name: "endpoint"
+        description: "Endpoint of Azure SignalR. Required if not included in the connection string."
+        example: |
+          "https://<your-azure-signalr>.service.signalr.net"
+  - title: "Access key"
+    description: "Authenticate using an access key."
+    metadata:
+      - name: "accessKey"
+        required: true
+        sensitive: true
+        description: "The access key for Azure SignalR."
+        example: |
+          "your-access-key"
+      - name: "endpoint"
+        required: true
+        description: "Endpoint of Azure SignalR. Required if not included in the connection string."
+        example: |
+          "https://<your-azure-signalr>.service.signalr.net"
+  - title: "Connection string with Azure AD credentials"
+    description: "Authenticate using Azure AD credentials defined in the connection string."
+    metadata:
+      - name: "connectionString"
+        required: true
+        sensitive: true
+        description: |
+          The Azure SignalR connection string containing Azure AD credentials. This includes the `AuthType=aad` option.
+          Note that you cannot use a connection string if your application's ClientSecret contains a `;` character.
+        # Note the example below contains Markdown inside a string
+        example: |
+          - With a system-assigned managed identity: `"Endpoint=https://<servicename>.service.signalr.net;AuthType=aad;Version=1.0;"`
+          - With a user-assigned managed identity: `"Endpoint=https://<servicename>.service.signalr.net;AuthType=aad;ClientId=<clientid>;Version=1.0;"`
+          - With an Azure AD application: `"Endpoint=https://<servicename>.service.signalr.net;AuthType=aad;ClientId=<clientid>;ClientSecret=<clientsecret>;TenantId=<tenantid>;Version=1.0;"`
+      - name: "endpoint"
+        description: "Endpoint of Azure SignalR. Required if not included in the connection string."
+        example: |
+          "https://<your-azure-signalr>.service.signalr.net"
+builtinAuthenticationProfiles:
+  - name: "azuread"
+    metadata:
+      - name: "endpoint"
+        description: "Endpoint of Azure SignalR"
+        example: |
+          "https://<your-azure-signalr>.service.signalr.net"
+        required: true
+metadata:
+  - name: "hub"
+    description: |
+      Defines the hub in which the message will be sent.
+      This value can also be set for each invocation of the binding by passing the metadata option `hub`` with the invocation request.
+    example: |
+      "myhub"
+

bindings/azure/signalr/signalr.go

@@ -16,6 +16,8 @@ package signalr
 import (
 	"bytes"
 	"context"
+	"crypto/tls"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -35,9 +37,6 @@ import (
 )
 
 const (
-	errorPrefix = "azure signalr error:"
-	logPrefix   = "azure signalr:"
-
 	connectionStringKey = "connectionString"
 	accessKeyKey        = "accessKey"
 	endpointKey         = "endpoint"
@@ -63,6 +62,11 @@ var httpClient *http.Client
 func init() {
 	httpClient = &http.Client{
 		Timeout: 30 * time.Second,
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				MinVersion: tls.VersionTLS12,
+			},
+		},
 	}
 }
 
@@ -192,7 +196,7 @@ func (s *SignalR) resolveAPIURL(req *bindings.InvokeRequest) (string, error) {
 		hub = s.hub
 	}
 	if hub == "" {
-		return "", fmt.Errorf("%s missing hub", errorPrefix)
+		return "", errors.New("missing hub")
 	}
 
 	// Hub name is lower-cased in the official SDKs (e.g. .NET)
@@ -233,10 +237,10 @@ func (s *SignalR) sendMessageToSignalR(ctx context.Context, url string, token st
 	}
 
 	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
-		return fmt.Errorf("%s azure signalr failed with code %d, content is '%s'", errorPrefix, resp.StatusCode, string(body))
+		return fmt.Errorf("azure signalr failed with code %d, content is '%s'", resp.StatusCode, string(body))
 	}
 
-	s.logger.Debugf("%s azure signalr call to '%s' completed with code %d", logPrefix, url, resp.StatusCode)
+	s.logger.Debugf("azure signalr call to '%s' completed with code %d", url, resp.StatusCode)
 
 	return nil
 }