feat: Add support for WASM compilation

Author: Arthur Amstutz

ovh/configuration.go

@@ -1,3 +1,5 @@
+//go:build !(js && wasm)
+
 package ovh
 
 import (

ovh/configuration_test.go

@@ -1,3 +1,5 @@
+//go:build !(js && wasm)
+
 package ovh
 
 import (

ovh/configuration_wasm.go

@@ -0,0 +1,122 @@
+//go:build js && wasm
+
+package ovh
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	"golang.org/x/oauth2/clientcredentials"
+)
+
+// loadConfig loads client configuration from params or environments (by order of decreasing precedence).
+//
+// loadConfig will check OVH_CONSUMER_KEY, OVH_APPLICATION_KEY, OVH_APPLICATION_SECRET
+// and OVH_ENDPOINT environment variables.
+// It will also check for alternative authentication means:
+//   - OVH_ACCESS_TOKEN
+//   - OVH_CLIENT_ID and OVH_CLIENT_SECRET
+func (c *Client) loadConfig(endpointName string) error {
+	if strings.HasSuffix(endpointName, "/") {
+		return fmt.Errorf("endpoint name cannot have a tailing slash")
+	}
+
+	// Canonicalize configuration
+	if endpointName == "" {
+		endpointName = getConfigValue("OVH_ENDPOINT", "ovh-eu")
+	}
+
+	if c.AccessToken == "" {
+		c.AccessToken = getConfigValue("OVH_ACCESS_TOKEN", "")
+	}
+
+	if c.AppKey == "" {
+		c.AppKey = getConfigValue("OVH_APPLICATION_KEY", "")
+	}
+
+	if c.AppSecret == "" {
+		c.AppSecret = getConfigValue("OVH_APPLICATION_SECRET", "")
+	}
+
+	if c.ConsumerKey == "" {
+		c.ConsumerKey = getConfigValue("OVH_CONSUMER_KEY", "")
+	}
+
+	if c.ClientID == "" {
+		c.ClientID = getConfigValue("OVH_CLIENT_ID", "")
+	}
+
+	if c.ClientSecret == "" {
+		c.ClientSecret = getConfigValue("OVH_CLIENT_SECRET", "")
+	}
+
+	configuredAuthMethods := []string{}
+	if c.AppKey != "" || c.AppSecret != "" || c.ConsumerKey != "" {
+		configuredAuthMethods = append(configuredAuthMethods, "application_key/application_secret")
+	}
+	if c.ClientID != "" || c.ClientSecret != "" {
+		configuredAuthMethods = append(configuredAuthMethods, "client_id/client_secret")
+	}
+	if c.AccessToken != "" {
+		configuredAuthMethods = append(configuredAuthMethods, "access_token")
+	}
+
+	if len(configuredAuthMethods) > 1 {
+		return fmt.Errorf("can't use multiple authentication methods: %s", strings.Join(configuredAuthMethods, ", "))
+	}
+	if len(configuredAuthMethods) == 0 {
+		return errors.New(
+			"missing authentication information, you need to provide one of the following: application_key/application_secret, client_id/client_secret, or access_token",
+		)
+	}
+
+	if (c.ClientID != "") != (c.ClientSecret != "") {
+		return errors.New("invalid oauth2 config, both client_id and client_secret must be given")
+	}
+	if (c.AppKey != "") != (c.AppSecret != "") {
+		return errors.New("invalid authentication config, both application_key and application_secret must be given")
+	}
+
+	// Load real endpoint URL by name. If endpoint contains a '/', consider it as a URL
+	if strings.Contains(endpointName, "/") {
+		c.endpoint = endpointName
+	} else {
+		c.endpoint = Endpoints[endpointName]
+	}
+
+	// If we still have no valid endpoint, AppKey or AppSecret, return an error
+	if c.endpoint == "" {
+		return fmt.Errorf("unknown endpoint '%s', consider checking 'Endpoints' list or using an URL", endpointName)
+	}
+
+	if c.ClientID != "" {
+		if _, ok := tokensURLs[c.endpoint]; !ok {
+			return fmt.Errorf("oauth2 authentication is not compatible with endpoint %q", c.endpoint)
+		}
+
+		conf := &clientcredentials.Config{
+			ClientID:     c.ClientID,
+			ClientSecret: c.ClientSecret,
+			TokenURL:     tokensURLs[c.endpoint],
+			Scopes:       []string{"all"},
+		}
+
+		c.oauth2TokenSource = conf.TokenSource(context.Background())
+	}
+
+	return nil
+}
+
+// getConfigValue returns the value 'name' from environment.
+// If the value could not be read from env, return 'def'.
+func getConfigValue(name, defaultValue string) string {
+	// Attempt to load from environment
+	if fromEnv := os.Getenv(name); fromEnv != "" {
+		return fromEnv
+	}
+
+	return defaultValue
+}

ovh/consumer_key_test.go

@@ -1,3 +1,5 @@
+//go:build !(js && wasm)
+
 package ovh
 
 import (

ovh/ovh_test.go

@@ -1,3 +1,5 @@
+//go:build !(js && wasm)
+
 package ovh
 
 import (