feat(ai-proxy): add Fireworks AI support (#2917)

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

@@ -0,0 +1,83 @@
+package provider
+
+import (
+	"errors"
+	"net/http"
+	"strings"
+
+	"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
+	"github.com/higress-group/wasm-go/pkg/wrapper"
+)
+
+// fireworksProvider is the provider for Fireworks AI service.
+
+const (
+	fireworksDomain = "api.fireworks.ai"
+)
+
+type fireworksProviderInitializer struct{}
+
+func (f *fireworksProviderInitializer) ValidateConfig(config *ProviderConfig) error {
+	if config.apiTokens == nil || len(config.apiTokens) == 0 {
+		return errors.New("no apiToken found in provider config")
+	}
+	return nil
+}
+
+func (f *fireworksProviderInitializer) DefaultCapabilities() map[string]string {
+	return map[string]string{
+		string(ApiNameChatCompletion): PathOpenAIChatCompletions,
+		string(ApiNameCompletion):     PathOpenAICompletions,
+		string(ApiNameModels):         PathOpenAIModels,
+	}
+}
+
+func (f *fireworksProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
+	config.setDefaultCapabilities(f.DefaultCapabilities())
+	return &fireworksProvider{
+		config:       config,
+		contextCache: createContextCache(&config),
+	}, nil
+}
+
+type fireworksProvider struct {
+	config       ProviderConfig
+	contextCache *contextCache
+}
+
+func (f *fireworksProvider) GetProviderType() string {
+	return providerTypeFireworks
+}
+
+func (f *fireworksProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName) error {
+	f.config.handleRequestHeaders(f, ctx, apiName)
+	return nil
+}
+
+func (f *fireworksProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) (types.Action, error) {
+	if !f.config.isSupportedAPI(apiName) {
+		return types.ActionContinue, errUnsupportedApiName
+	}
+	return f.config.handleRequestBody(f, f.contextCache, ctx, apiName, body)
+}
+
+func (f *fireworksProvider) TransformRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, headers http.Header) {
+	util.OverwriteRequestPathHeaderByCapability(headers, string(apiName), f.config.capabilities)
+	util.OverwriteRequestHostHeader(headers, fireworksDomain)
+	util.OverwriteRequestAuthorizationHeader(headers, "Bearer "+f.config.GetApiTokenInUse(ctx))
+	headers.Del("Content-Length")
+}
+
+func (f *fireworksProvider) GetApiName(path string) ApiName {
+	if strings.Contains(path, PathOpenAIChatCompletions) {
+		return ApiNameChatCompletion
+	}
+	if strings.Contains(path, PathOpenAICompletions) {
+		return ApiNameCompletion
+	}
+	if strings.Contains(path, PathOpenAIModels) {
+		return ApiNameModels
+	}
+	return ""
+}