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feat: add azure, examples, and message constructors
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,237 @@ | ||
| // Package azure provides configuration options so you can connect and use Azure OpenAI using the [openai.Client]. | ||
| // | ||
| // Typical usage of this package will look like this: | ||
| // | ||
| // client := openai.NewClient( | ||
| // azure.WithEndpoint(azureOpenAIEndpoint, azureOpenAIAPIVersion), | ||
| // azure.WithTokenCredential(azureIdentityTokenCredential), | ||
| // // or azure.WithAPIKey(azureOpenAIAPIKey), | ||
| // ) | ||
| // | ||
| // Or, if you want to construct a specific service: | ||
| // | ||
| // client := openai.NewChatCompletionService( | ||
| // azure.WithEndpoint(azureOpenAIEndpoint, azureOpenAIAPIVersion), | ||
| // azure.WithTokenCredential(azureIdentityTokenCredential), | ||
| // // or azure.WithAPIKey(azureOpenAIAPIKey), | ||
| // ) | ||
| package azure | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "errors" | ||
| "io" | ||
| "mime" | ||
| "mime/multipart" | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
|
|
||
| "github.com/Azure/azure-sdk-for-go/sdk/azcore" | ||
| "github.com/Azure/azure-sdk-for-go/sdk/azcore/policy" | ||
| "github.com/Azure/azure-sdk-for-go/sdk/azcore/runtime" | ||
| "github.com/openai/openai-go/internal/requestconfig" | ||
| "github.com/openai/openai-go/option" | ||
| ) | ||
|
|
||
| // WithEndpoint configures this client to connect to an Azure OpenAI endpoint. | ||
| // | ||
| // - endpoint - the Azure OpenAI endpoint to connect to. Ex: https://<azure-openai-resource>.openai.azure.com | ||
| // - apiVersion - the Azure OpenAI API version to target (ex: 2024-06-01). See [Azure OpenAI apiversions] for current API versions. This value cannot be empty. | ||
| // | ||
| // This function should be paired with a call to authenticate, like [azure.WithAPIKey] or [azure.WithTokenCredential], similar to this: | ||
| // | ||
| // client := openai.NewClient( | ||
| // azure.WithEndpoint(azureOpenAIEndpoint, azureOpenAIAPIVersion), | ||
| // azure.WithTokenCredential(azureIdentityTokenCredential), | ||
| // // or azure.WithAPIKey(azureOpenAIAPIKey), | ||
| // ) | ||
| // | ||
| // [Azure OpenAI apiversions]: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#rest-api-versioning | ||
| func WithEndpoint(endpoint string, apiVersion string) option.RequestOption { | ||
| if !strings.HasSuffix(endpoint, "/") { | ||
| endpoint += "/" | ||
| } | ||
|
|
||
| endpoint += "openai/" | ||
|
|
||
| withQueryAdd := option.WithQueryAdd("api-version", apiVersion) | ||
| withEndpoint := option.WithBaseURL(endpoint) | ||
|
|
||
| withModelMiddleware := option.WithMiddleware(func(r *http.Request, mn option.MiddlewareNext) (*http.Response, error) { | ||
| replacementPath, err := getReplacementPathWithDeployment(r) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| r.URL.Path = replacementPath | ||
| return mn(r) | ||
| }) | ||
|
|
||
| return func(rc *requestconfig.RequestConfig) error { | ||
| if apiVersion == "" { | ||
| return errors.New("apiVersion is an empty string, but needs to be set. See https://learn.microsoft.com/en-us/azure/ai-services/openai/reference#rest-api-versioning for details.") | ||
| } | ||
|
|
||
| if err := withQueryAdd(rc); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err := withEndpoint(rc); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err := withModelMiddleware(rc); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
| } | ||
|
|
||
| // WithTokenCredential configures this client to authenticate using an [Azure Identity] TokenCredential. | ||
| // This function should be paired with a call to [WithEndpoint] to point to your Azure OpenAI instance. | ||
| // | ||
| // [Azure Identity]: https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azidentity | ||
| func WithTokenCredential(tokenCredential azcore.TokenCredential) option.RequestOption { | ||
| bearerTokenPolicy := runtime.NewBearerTokenPolicy(tokenCredential, []string{"https://cognitiveservices.azure.com/.default"}, nil) | ||
|
|
||
| // add in a middleware that uses the bearer token generated from the token credential | ||
| return option.WithMiddleware(func(req *http.Request, next option.MiddlewareNext) (*http.Response, error) { | ||
| pipeline := runtime.NewPipeline("azopenai-extensions", version, runtime.PipelineOptions{}, &policy.ClientOptions{ | ||
| InsecureAllowCredentialWithHTTP: true, // allow for plain HTTP proxies, etc.. | ||
| PerRetryPolicies: []policy.Policy{ | ||
| bearerTokenPolicy, | ||
| policyAdapter(next), | ||
| }, | ||
| }) | ||
|
|
||
| req2, err := runtime.NewRequestFromRequest(req) | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return pipeline.Do(req2) | ||
| }) | ||
| } | ||
|
|
||
| // WithAPIKey configures this client to authenticate using an API key. | ||
| // This function should be paired with a call to [WithEndpoint] to point to your Azure OpenAI instance. | ||
| func WithAPIKey(apiKey string) option.RequestOption { | ||
| // NOTE: there is an option.WithApiKey(), but that adds the value into | ||
| // the Authorization header instead so we're doing this instead. | ||
| return option.WithHeader("Api-Key", apiKey) | ||
| } | ||
|
|
||
| // jsonRoutes have JSON payloads - we'll deserialize looking for a .model field in there | ||
| // so we won't have to worry about individual types for completions vs embeddings, etc... | ||
| var jsonRoutes = map[string]bool{ | ||
| "/openai/completions": true, | ||
| "/openai/chat/completions": true, | ||
| "/openai/embeddings": true, | ||
| "/openai/audio/speech": true, | ||
| "/openai/images/generations": true, | ||
| } | ||
|
|
||
| // audioMultipartRoutes have mime/multipart payloads. These are less generic - we're very much | ||
| // expecting a transcription or translation payload for these. | ||
| var audioMultipartRoutes = map[string]bool{ | ||
| "/openai/audio/transcriptions": true, | ||
| "/openai/audio/translations": true, | ||
| } | ||
|
|
||
| // getReplacementPathWithDeployment parses the request body to extract out the Model parameter (or equivalent) | ||
| // (note, the req.Body is fully read as part of this, and is replaced with a bytes.Reader) | ||
| func getReplacementPathWithDeployment(req *http.Request) (string, error) { | ||
| if jsonRoutes[req.URL.Path] { | ||
| return getJSONRoute(req) | ||
| } | ||
|
|
||
| if audioMultipartRoutes[req.URL.Path] { | ||
| return getAudioMultipartRoute(req) | ||
| } | ||
|
|
||
| // No need to relocate the path. We've already tacked on /openai when we setup the endpoint. | ||
| return req.URL.Path, nil | ||
| } | ||
|
|
||
| func getJSONRoute(req *http.Request) (string, error) { | ||
| // we need to deserialize the body, partly, in order to read out the model field. | ||
| jsonBytes, err := io.ReadAll(req.Body) | ||
|
|
||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| // make sure we restore the body so it can be used in later middlewares. | ||
| req.Body = io.NopCloser(bytes.NewReader(jsonBytes)) | ||
|
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| var v *struct { | ||
| Model string `json:"model"` | ||
| } | ||
|
|
||
| if err := json.Unmarshal(jsonBytes, &v); err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| escapedDeployment := url.PathEscape(v.Model) | ||
| return strings.Replace(req.URL.Path, "/openai/", "/openai/deployments/"+escapedDeployment+"/", 1), nil | ||
| } | ||
|
|
||
| func getAudioMultipartRoute(req *http.Request) (string, error) { | ||
| // body is a multipart/mime body type instead. | ||
| mimeBytes, err := io.ReadAll(req.Body) | ||
|
|
||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| // make sure we restore the body so it can be used in later middlewares. | ||
| req.Body = io.NopCloser(bytes.NewReader(mimeBytes)) | ||
|
|
||
| _, mimeParams, err := mime.ParseMediaType(req.Header.Get("Content-Type")) | ||
|
|
||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| mimeReader := multipart.NewReader( | ||
| io.NopCloser(bytes.NewReader(mimeBytes)), | ||
| mimeParams["boundary"]) | ||
|
|
||
| for { | ||
| mp, err := mimeReader.NextPart() | ||
|
|
||
| if err != nil { | ||
| if errors.Is(err, io.EOF) { | ||
| return "", errors.New("unable to find the model part in multipart body") | ||
| } | ||
|
|
||
| return "", err | ||
| } | ||
|
|
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| defer mp.Close() | ||
|
|
||
| if mp.FormName() == "model" { | ||
| modelBytes, err := io.ReadAll(mp) | ||
|
|
||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
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| escapedDeployment := url.PathEscape(string(modelBytes)) | ||
| return strings.Replace(req.URL.Path, "/openai/", "/openai/deployments/"+escapedDeployment+"/", 1), nil | ||
| } | ||
| } | ||
| } | ||
|
|
||
| type policyAdapter option.MiddlewareNext | ||
|
|
||
| func (mp policyAdapter) Do(req *policy.Request) (*http.Response, error) { | ||
| return (option.MiddlewareNext)(mp)(req.Raw()) | ||
| } | ||
|
|
||
| const version = "v.0.1.0" |
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