mirror of
https://github.com/alibaba/higress.git
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118 lines
3.7 KiB
Go
118 lines
3.7 KiB
Go
package provider
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import (
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"errors"
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"net/http"
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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/higress-group/proxy-wasm-go-sdk/proxywasm/types"
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"github.com/higress-group/wasm-go/pkg/wrapper"
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"github.com/tidwall/gjson"
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"github.com/tidwall/sjson"
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)
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// openrouterProvider is the provider for OpenRouter service.
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const (
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openrouterDomain = "openrouter.ai"
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openrouterChatCompletionPath = "/api/v1/chat/completions"
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openrouterCompletionPath = "/api/v1/completions"
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)
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type openrouterProviderInitializer struct{}
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func (o *openrouterProviderInitializer) ValidateConfig(config *ProviderConfig) error {
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if 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 (o *openrouterProviderInitializer) DefaultCapabilities() map[string]string {
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return map[string]string{
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string(ApiNameChatCompletion): openrouterChatCompletionPath,
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string(ApiNameCompletion): openrouterCompletionPath,
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}
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}
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func (o *openrouterProviderInitializer) CreateProvider(config ProviderConfig) (Provider, error) {
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config.setDefaultCapabilities(o.DefaultCapabilities())
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return &openrouterProvider{
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config: config,
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contextCache: createContextCache(&config),
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}, nil
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}
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type openrouterProvider struct {
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config ProviderConfig
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contextCache *contextCache
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}
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func (o *openrouterProvider) GetProviderType() string {
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return providerTypeOpenRouter
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}
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func (o *openrouterProvider) OnRequestHeaders(ctx wrapper.HttpContext, apiName ApiName) error {
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o.config.handleRequestHeaders(o, ctx, apiName)
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return nil
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}
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func (o *openrouterProvider) OnRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) (types.Action, error) {
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if !o.config.isSupportedAPI(apiName) {
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return types.ActionContinue, errUnsupportedApiName
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}
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return o.config.handleRequestBody(o, o.contextCache, ctx, apiName, body)
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}
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func (o *openrouterProvider) TransformRequestHeaders(ctx wrapper.HttpContext, apiName ApiName, headers http.Header) {
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util.OverwriteRequestPathHeaderByCapability(headers, string(apiName), o.config.capabilities)
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util.OverwriteRequestHostHeader(headers, openrouterDomain)
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util.OverwriteRequestAuthorizationHeader(headers, "Bearer "+o.config.GetApiTokenInUse(ctx))
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headers.Del("Content-Length")
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}
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func (o *openrouterProvider) TransformRequestBody(ctx wrapper.HttpContext, apiName ApiName, body []byte) ([]byte, error) {
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if apiName != ApiNameChatCompletion {
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return o.config.defaultTransformRequestBody(ctx, apiName, body)
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}
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// Check if ReasoningMaxTokens exists in the request body
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reasoningMaxTokens := gjson.GetBytes(body, "reasoning_max_tokens")
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if !reasoningMaxTokens.Exists() || reasoningMaxTokens.Int() == 0 {
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// No reasoning_max_tokens, use default transformation
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return o.config.defaultTransformRequestBody(ctx, apiName, body)
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}
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// Clear reasoning_effort field if it exists
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modifiedBody, err := sjson.DeleteBytes(body, "reasoning_effort")
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if err != nil {
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// If delete fails, continue with original body
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modifiedBody = body
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}
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// Set reasoning.max_tokens to the value of reasoning_max_tokens
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modifiedBody, err = sjson.SetBytes(modifiedBody, "reasoning.max_tokens", reasoningMaxTokens.Int())
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if err != nil {
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return nil, err
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}
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// Remove the original reasoning_max_tokens field
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modifiedBody, err = sjson.DeleteBytes(modifiedBody, "reasoning_max_tokens")
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if err != nil {
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return nil, err
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}
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// Apply default model mapping
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return o.config.defaultTransformRequestBody(ctx, apiName, modifiedBody)
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}
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func (o *openrouterProvider) GetApiName(path string) ApiName {
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if strings.Contains(path, openrouterChatCompletionPath) {
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return ApiNameChatCompletion
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}
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if strings.Contains(path, openrouterCompletionPath) {
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return ApiNameCompletion
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}
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return ""
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}
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