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102 lines
3.2 KiB
Go
102 lines
3.2 KiB
Go
package provider
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import (
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"errors"
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"fmt"
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"net/url"
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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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// 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) 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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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, log wrapper.Log) (types.Action, error) {
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_ = util.OverwriteRequestPath(m.serviceUrl.RequestURI())
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_ = util.OverwriteRequestHost(m.serviceUrl.Host)
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_ = proxywasm.ReplaceHttpRequestHeader("api-key", m.config.apiTokens[0])
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if apiName == ApiNameChatCompletion {
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_ = proxywasm.RemoveHttpRequestHeader("Content-Length")
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} else {
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ctx.DontReadRequestBody()
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}
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return types.ActionContinue, nil
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}
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func (m *azureProvider) 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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// We don't need to process the request body for other APIs.
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return types.ActionContinue, nil
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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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if m.contextCache == nil {
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if err := replaceJsonRequestBody(request, log); err != nil {
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_ = util.SendResponse(500, "ai-proxy.openai.set_include_usage_failed", util.MimeTypeTextPlain, fmt.Sprintf("failed to replace request body: %v", err))
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}
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return types.ActionContinue, nil
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}
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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.azure.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.azure.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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}
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return types.ActionContinue, err
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}
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