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103 lines
3.4 KiB
Go
103 lines
3.4 KiB
Go
package provider
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import (
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"errors"
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"fmt"
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"github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util"
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"github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper"
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"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
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"github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types"
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)
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const (
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doubaoDomain = "ark.cn-beijing.volces.com"
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doubaoChatCompletionPath = "/api/v3/chat/completions"
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)
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type doubaoProviderInitializer struct{}
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func (m *doubaoProviderInitializer) 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 *doubaoProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
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return &doubaoProvider{
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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 doubaoProvider struct {
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config ProviderConfig
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contextCache *contextCache
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}
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func (m *doubaoProvider) GetProviderType() string {
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return providerTypeDoubao
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}
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func (m *doubaoProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) {
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_ = util.OverwriteRequestHost(doubaoDomain)
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_ = util.OverwriteRequestAuthorization("Bearer " + m.config.GetRandomToken())
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_ = proxywasm.RemoveHttpRequestHeader("Content-Length")
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if m.config.protocol == protocolOriginal {
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ctx.DontReadRequestBody()
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return types.ActionContinue, nil
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}
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if apiName != ApiNameChatCompletion {
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return types.ActionContinue, errUnsupportedApiName
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}
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_ = util.OverwriteRequestPath(doubaoChatCompletionPath)
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return types.ActionContinue, nil
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}
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func (m *doubaoProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) {
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if apiName != ApiNameChatCompletion {
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return types.ActionContinue, errUnsupportedApiName
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}
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request := &chatCompletionRequest{}
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if err := decodeChatCompletionRequest(body, request); err != nil {
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return types.ActionContinue, err
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}
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model := request.Model
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if model == "" {
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return types.ActionContinue, errors.New("missing model in chat completion request")
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}
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mappedModel := getMappedModel(model, m.config.modelMapping, log)
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if mappedModel == "" {
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return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping")
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}
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request.Model = mappedModel
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if m.contextCache != nil {
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err := m.contextCache.GetContent(func(content string, err error) {
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defer func() {
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_ = proxywasm.ResumeHttpRequest()
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}()
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if err != nil {
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log.Errorf("failed to load context file: %v", err)
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_ = util.SendResponse(500, "ai-proxy.doubao.load_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err))
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}
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insertContextMessage(request, content)
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if err := replaceJsonRequestBody(request, log); err != nil {
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_ = util.SendResponse(500, "ai-proxy.doubao.insert_ctx_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
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}
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}, log)
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if err == nil {
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return types.ActionPause, nil
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} else {
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return types.ActionContinue, err
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}
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} else {
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if err := replaceJsonRequestBody(request, log); err != nil {
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_ = util.SendResponse(500, "ai-proxy.doubao.transform_body_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
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return types.ActionContinue, err
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}
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_ = proxywasm.ResumeHttpRequest()
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return types.ActionPause, nil
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}
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}
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