feat(provider): add support for Grok provider in AI proxy (#2713)

Co-authored-by: 韩贤涛 <601803023@qq.com>

plugins/wasm-go/extensions/ai-proxy/provider/grok.go

@@ -0,0 +1,75 @@
+package provider
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
+	"github.com/higress-group/wasm-go/pkg/wrapper"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+)
+
+// grokProvider is the provider for Grok service.
+const (
+	grokDomain             = "api.x.ai"
+	grokChatCompletionPath = "/v1/chat/completions"
+)
+
+type grokProviderInitializer struct{}
+
+func (g *grokProviderInitializer) ValidateConfig(config *ProviderConfig) error {
+	if config.apiTokens == nil || len(config.apiTokens) == 0 {
+		return errors.New("no apiToken found in provider config")
+	}
+	return nil
+}
+
+func (g *grokProviderInitializer) DefaultCapabilities() map[string]string {
+	return map[string]string{
+		string(ApiNameChatCompletion): grokChatCompletionPath,
+	}
+}
+
+func (g *grokProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
+	config.setDefaultCapabilities(g.DefaultCapabilities())
+	return &grokProvider{
+		config:       config,
+		contextCache: createContextCache(&config),
+	}, nil
+}
+
+type grokProvider struct {
+	config       ProviderConfig
+	contextCache *contextCache
+}
+
+func (g *grokProvider) GetProviderType() string {
+	return providerTypeGrok
+}
+
+func (g *grokProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName) error {
+	g.config.handleRequestHeaders(g, ctx, apiName)
+	return nil
+}
+
+func (g *grokProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) (types.Action, error) {
+	if !g.config.isSupportedAPI(apiName) {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	return g.config.handleRequestBody(g, g.contextCache, ctx, apiName, body)
+}
+
+func (g *grokProvider) TransformRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, headers http.Header) {
+	util.OverwriteRequestPathHeaderByCapability(headers, string(apiName), g.config.capabilities)
+	util.OverwriteRequestHostHeader(headers, grokDomain)
+	util.OverwriteRequestAuthorizationHeader(headers, "Bearer "+g.config.GetApiTokenInUse(ctx))
+	headers.Del("Content-Length")
+}
+
+func (g *grokProvider) GetApiName(path string) ApiName {
+	if strings.Contains(path, grokChatCompletionPath) {
+		return ApiNameChatCompletion
+	}
+	return ""
+}

plugins/wasm-go/extensions/ai-proxy/provider/provider.go

@@ -107,6 +107,7 @@ const (
 	providerTypeQwen       = "qwen"
 	providerTypeOpenAI     = "openai"
 	providerTypeGroq       = "groq"
+	providerTypeGrok       = "grok"
 	providerTypeBaichuan   = "baichuan"
 	providerTypeYi         = "yi"
 	providerTypeDeepSeek   = "deepseek"
@@ -182,6 +183,7 @@ var (
 		providerTypeQwen:       &qwenProviderInitializer{},
 		providerTypeOpenAI:     &openaiProviderInitializer{},
 		providerTypeGroq:       &groqProviderInitializer{},
+		providerTypeGrok:       &grokProviderInitializer{},
 		providerTypeBaichuan:   &baichuanProviderInitializer{},
 		providerTypeYi:         &yiProviderInitializer{},
 		providerTypeDeepSeek:   &deepseekProviderInitializer{},