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124 lines
3.6 KiB
Go
124 lines
3.6 KiB
Go
package provider
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import (
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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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/log"
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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/types"
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)
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const (
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pathAzureFiles = "/openai/files"
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pathAzureBatches = "/openai/batches"
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)
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// azureProvider is the provider for Azure OpenAI service.
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type azureProviderInitializer struct {
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}
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func (m *azureProviderInitializer) DefaultCapabilities() map[string]string {
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return map[string]string{
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// TODO: azure's pattern is the same as openai, just need to handle the prefix, can be done in TransformRequestHeaders to support general capabilities
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string(ApiNameChatCompletion): PathOpenAIChatCompletions,
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string(ApiNameEmbeddings): PathOpenAIEmbeddings,
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string(ApiNameFiles): PathOpenAIFiles,
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string(ApiNameBatches): PathOpenAIBatches,
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}
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}
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func (m *azureProviderInitializer) ValidateConfig(config *ProviderConfig) error {
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if config.azureServiceUrl == "" {
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return errors.New("missing azureServiceUrl in provider config")
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}
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if _, err := url.Parse(config.azureServiceUrl); err != nil {
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return fmt.Errorf("invalid azureServiceUrl: %w", err)
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}
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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 *azureProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
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var serviceUrl *url.URL
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if u, err := url.Parse(config.azureServiceUrl); err != nil {
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return nil, fmt.Errorf("invalid azureServiceUrl: %w", err)
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} else {
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serviceUrl = u
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}
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config.setDefaultCapabilities(m.DefaultCapabilities())
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return &azureProvider{
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config: config,
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serviceUrl: serviceUrl,
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contextCache: createContextCache(&config),
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}, nil
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}
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type azureProvider struct {
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config ProviderConfig
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contextCache *contextCache
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serviceUrl *url.URL
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}
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func (m *azureProvider) GetProviderType() string {
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return providerTypeAzure
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}
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func (m *azureProvider) 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 *azureProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) (types.Action, error) {
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return m.config.handleRequestBody(m, m.contextCache, ctx, apiName, body)
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}
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func (m *azureProvider) TransformRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, headers http.Header) {
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finalRequestUrl := *m.serviceUrl
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if u, e := url.Parse(ctx.Path()); e == nil {
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if len(u.Query()) != 0 {
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q := m.serviceUrl.Query()
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for k, v := range u.Query() {
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switch len(v) {
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case 0:
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break
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case 1:
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q.Set(k, v[0])
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break
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default:
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delete(q, k)
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for _, vv := range v {
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q.Add(k, vv)
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}
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}
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}
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finalRequestUrl.RawQuery = q.Encode()
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}
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if filesIndex := strings.Index(u.Path, "/files"); filesIndex != -1 {
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finalRequestUrl.Path = pathAzureFiles + u.Path[filesIndex+len("/files"):]
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} else if batchesIndex := strings.Index(u.Path, "/batches"); batchesIndex != -1 {
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finalRequestUrl.Path = pathAzureBatches + u.Path[batchesIndex+len("/batches"):]
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}
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} else {
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log.Errorf("failed to parse request path: %v", e)
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}
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util.OverwriteRequestPathHeader(headers, finalRequestUrl.RequestURI())
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util.OverwriteRequestHostHeader(headers, m.serviceUrl.Host)
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headers.Set("api-key", m.config.GetApiTokenInUse(ctx))
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headers.Del("Content-Length")
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if !m.config.isSupportedAPI(apiName) {
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// If the API is not supported, we should not read the request body and keep it as it is.
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ctx.DontReadRequestBody()
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}
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}
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