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feat: support ollama ai model (#1001)
Co-authored-by: Kent Dong <ch3cho@qq.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| package provider | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| "github.com/alibaba/higress/plugins/wasm-go/extensions/ai-proxy/util" | ||
| "github.com/alibaba/higress/plugins/wasm-go/pkg/wrapper" | ||
| "github.com/higress-group/proxy-wasm-go-sdk/proxywasm" | ||
| "github.com/higress-group/proxy-wasm-go-sdk/proxywasm/types" | ||
| ) | ||
|
|
||
| // ollamaProvider is the provider for Ollama service. | ||
|
|
||
| const ( | ||
| ollamaChatCompletionPath = "/v1/chat/completions" | ||
| ) | ||
|
|
||
| type ollamaProviderInitializer struct { | ||
| } | ||
|
|
||
| func (m *ollamaProviderInitializer) ValidateConfig(config ProviderConfig) error { | ||
| if config.ollamaServerHost == "" { | ||
| return errors.New("missing ollamaServerHost in provider config") | ||
| } | ||
| if config.ollamaServerPort == 0 { | ||
| return errors.New("missing ollamaServerPort in provider config") | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (m *ollamaProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) { | ||
| serverPortStr := fmt.Sprintf("%d", config.ollamaServerPort) | ||
| serviceDomain := config.ollamaServerHost + ":" + serverPortStr | ||
| return &ollamaProvider{ | ||
| config: config, | ||
| serviceDomain: serviceDomain, | ||
| contextCache: createContextCache(&config), | ||
| }, nil | ||
| } | ||
|
|
||
| type ollamaProvider struct { | ||
| config ProviderConfig | ||
| serviceDomain string | ||
| contextCache *contextCache | ||
| } | ||
|
|
||
| func (m *ollamaProvider) GetProviderType() string { | ||
| return providerTypeOllama | ||
| } | ||
|
|
||
| func (m *ollamaProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, log wrapper.Log) (types.Action, error) { | ||
| if apiName != ApiNameChatCompletion { | ||
| return types.ActionContinue, errUnsupportedApiName | ||
| } | ||
| _ = util.OverwriteRequestPath(ollamaChatCompletionPath) | ||
| _ = util.OverwriteRequestHost(m.serviceDomain) | ||
| _ = proxywasm.RemoveHttpRequestHeader("Content-Length") | ||
|
|
||
| return types.ActionContinue, nil | ||
| } | ||
|
|
||
| func (m *ollamaProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte, log wrapper.Log) (types.Action, error) { | ||
| if apiName != ApiNameChatCompletion { | ||
| return types.ActionContinue, errUnsupportedApiName | ||
| } | ||
|
|
||
| if m.config.modelMapping == nil && m.contextCache == nil { | ||
| return types.ActionContinue, nil | ||
| } | ||
|
|
||
| request := &chatCompletionRequest{} | ||
| if err := decodeChatCompletionRequest(body, request); err != nil { | ||
| return types.ActionContinue, err | ||
| } | ||
|
|
||
| model := request.Model | ||
| if model == "" { | ||
| return types.ActionContinue, errors.New("missing model in chat completion request") | ||
| } | ||
| mappedModel := getMappedModel(model, m.config.modelMapping, log) | ||
| if mappedModel == "" { | ||
| return types.ActionContinue, errors.New("model becomes empty after applying the configured mapping") | ||
| } | ||
| request.Model = mappedModel | ||
|
|
||
| if m.contextCache != nil { | ||
| err := m.contextCache.GetContent(func(content string, err error) { | ||
| defer func() { | ||
| _ = proxywasm.ResumeHttpRequest() | ||
| }() | ||
| if err != nil { | ||
| log.Errorf("failed to load context file: %v", err) | ||
| _ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to load context file: %v", err)) | ||
| } | ||
| insertContextMessage(request, content) | ||
| if err := replaceJsonRequestBody(request, log); err != nil { | ||
| _ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err)) | ||
| } | ||
| }, log) | ||
| if err == nil { | ||
| return types.ActionPause, nil | ||
| } else { | ||
| return types.ActionContinue, err | ||
| } | ||
| } else { | ||
| if err := replaceJsonRequestBody(request, log); err != nil { | ||
| _ = util.SendResponse(500, util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err)) | ||
| return types.ActionContinue, err | ||
| } | ||
| _ = proxywasm.ResumeHttpRequest() | ||
| return types.ActionPause, nil | ||
| } | ||
| } |
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