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91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
package provider
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import (
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"encoding/json"
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"errors"
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"net/http"
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"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
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"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
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"github.com/higress-group/wasm-go/pkg/wrapper"
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)
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// longcatProvider is the provider for LongCat AI service.
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const (
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longcatDomain = "api.longcat.chat"
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)
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type longcatProviderInitializer struct{}
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func (m *longcatProviderInitializer) ValidateConfig(config *ProviderConfig) error {
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if config.apiTokens == nil || len(config.apiTokens) == 0 {
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return errors.New("no apiToken found in provider config")
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}
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return nil
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}
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func (m *longcatProviderInitializer) DefaultCapabilities() map[string]string {
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return map[string]string{
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string(ApiNameChatCompletion): PathOpenAIChatCompletions,
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string(ApiNameEmbeddings): PathOpenAIEmbeddings,
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string(ApiNameModels): PathOpenAIModels,
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}
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}
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func (m *longcatProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
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config.setDefaultCapabilities(m.DefaultCapabilities())
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return &longcatProvider{
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config: config,
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contextCache: createContextCache(&config),
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}, nil
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}
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type longcatProvider struct {
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config ProviderConfig
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contextCache *contextCache
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}
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func (m *longcatProvider) GetProviderType() string {
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return providerTypeLongcat
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}
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func (m *longcatProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName) error {
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m.config.handleRequestHeaders(m, ctx, apiName)
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return nil
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}
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func (m *longcatProvider) TransformRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, headers http.Header) {
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util.OverwriteRequestPathHeaderByCapability(headers, string(apiName), m.config.capabilities)
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util.OverwriteRequestHostHeader(headers, longcatDomain)
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util.OverwriteRequestAuthorizationHeader(headers, "Bearer "+m.config.GetApiTokenInUse(ctx))
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headers.Del("Content-Length")
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}
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func (m *longcatProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) (types.Action, error) {
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if !m.config.isSupportedAPI(apiName) {
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return types.ActionContinue, errUnsupportedApiName
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}
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return m.config.handleRequestBody(m, m.contextCache, ctx, apiName, body)
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}
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func (m *longcatProvider) TransformRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) ([]byte, error) {
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if m.config.responseJsonSchema != nil && apiName == ApiNameChatCompletion {
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request := &chatCompletionRequest{}
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if err := decodeChatCompletionRequest(body, request); err != nil {
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return nil, err
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}
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request.ResponseFormat = m.config.responseJsonSchema
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body, err := json.Marshal(request)
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if err != nil {
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return nil, err
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}
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return body, nil
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}
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// For testing purposes, skip defaultTransformRequestBody if ctx is nil
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if ctx != nil {
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return m.config.defaultTransformRequestBody(ctx, apiName, body)
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}
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return body, nil
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}
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