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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| package provider | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "github.com/higress-group/proxy-wasm-go-sdk/proxywasm" | ||
| "github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types" | ||
|
|
||
| "github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util" | ||
| "github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper" | ||
| ) | ||
|
|
||
| // githubProvider is the provider for GitHub OpenAI service. | ||
| const ( | ||
| githubDomain = "models.inference.ai.azure.com" | ||
| githubCompletionPath = "/chat/completions" | ||
| githubEmbeddingPath = "/embeddings" | ||
| ) | ||
|
|
||
| type githubProviderInitializer struct { | ||
| } | ||
|
|
||
| type githubProvider struct { | ||
| config ProviderConfig | ||
| contextCache *contextCache | ||
| } | ||
|
|
||
| func (m *githubProviderInitializer) ValidateConfig(config ProviderConfig) error { | ||
| if config.apiTokens == nil || len(config.apiTokens) == 0 { | ||
| return errors.New("no apiToken found in provider config") | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (m *githubProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) { | ||
| return &githubProvider{ | ||
| config: config, | ||
| contextCache: createContextCache(&config), | ||
| }, nil | ||
| } | ||
|
|
||
| func (m *githubProvider) GetProviderType() string { | ||
| return providerTypeGithub | ||
| } | ||
|
|
||
| func (m *githubProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) { | ||
| if apiName != ApiNameChatCompletion && apiName != ApiNameEmbeddings { | ||
| return types.ActionContinue, errUnsupportedApiName | ||
| } | ||
| _ = util.OverwriteRequestHost(githubDomain) | ||
| if apiName == ApiNameChatCompletion { | ||
| _ = util.OverwriteRequestPath(githubCompletionPath) | ||
| } | ||
| if apiName == ApiNameEmbeddings { | ||
| _ = util.OverwriteRequestPath(githubEmbeddingPath) | ||
| } | ||
| _ = proxywasm.RemoveHttpRequestHeader("Accept-Encoding") | ||
| _ = proxywasm.RemoveHttpRequestHeader("Content-Length") | ||
| _ = proxywasm.ReplaceHttpRequestHeader("Authorization", m.config.GetRandomToken()) | ||
| // Delay the header processing to allow changing streaming mode in OnRequestBody | ||
| return types.HeaderStopIteration, nil | ||
| } | ||
|
|
||
| func (m *githubProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) { | ||
| if apiName != ApiNameChatCompletion && apiName != ApiNameEmbeddings { | ||
| return types.ActionContinue, errUnsupportedApiName | ||
| } | ||
| if apiName == ApiNameChatCompletion { | ||
| return m.onChatCompletionRequestBody(ctx, body, log) | ||
| } | ||
| if apiName == ApiNameEmbeddings { | ||
| return m.onEmbeddingsRequestBody(ctx, body, log) | ||
| } | ||
| return types.ActionContinue, errUnsupportedApiName | ||
| } | ||
|
|
||
| func (m *githubProvider) onChatCompletionRequestBody(ctx wrapper.HttpContext, body []byte, log wrapper.Log) (types.Action, error) { | ||
| request := &chatCompletionRequest{} | ||
| if err := decodeChatCompletionRequest(body, request); err != nil { | ||
| return types.ActionContinue, err | ||
| } | ||
| if request.Model == "" { | ||
| return types.ActionContinue, errors.New("missing model in chat completion request") | ||
| } | ||
| // 映射模型 | ||
| mappedModel := getMappedModel(request.Model, m.config.modelMapping, log) | ||
| if mappedModel == "" { | ||
| return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping") | ||
| } | ||
| ctx.SetContext(ctxKeyFinalRequestModel, mappedModel) | ||
| request.Model = mappedModel | ||
| return types.ActionContinue, replaceJsonRequestBody(request, log) | ||
| } | ||
|
|
||
| func (m *githubProvider) onEmbeddingsRequestBody(ctx wrapper.HttpContext, body []byte, log wrapper.Log) (types.Action, error) { | ||
| request := &embeddingsRequest{} | ||
| if err := json.Unmarshal(body, request); err != nil { | ||
| return types.ActionContinue, fmt.Errorf("unable to unmarshal request: %v", err) | ||
| } | ||
| if request.Model == "" { | ||
| return types.ActionContinue, errors.New("missing model in embeddings request") | ||
| } | ||
| // 映射模型 | ||
| mappedModel := getMappedModel(request.Model, m.config.modelMapping, log) | ||
| if mappedModel == "" { | ||
| return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping") | ||
| } | ||
| ctx.SetContext(ctxKeyFinalRequestModel, mappedModel) | ||
| request.Model = mappedModel | ||
| return types.ActionContinue, replaceJsonRequestBody(request, log) | ||
| } |
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