137 lines
3.1 KiB
Go
137 lines
3.1 KiB
Go
// Copyright 2023 The casbin Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package model
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"strings"
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"github.com/Lok-Lu/go-openrouter"
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"github.com/casbin/casibase/proxy"
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)
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type OpenRouterModelProvider struct {
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subType string
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secretKey string
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siteName string
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siteUrl string
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temperature *float32
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topP *float32
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}
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func NewOpenRouterModelProvider(subType string, secretKey string, temperature float32, topP float32) (*OpenRouterModelProvider, error) {
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p := &OpenRouterModelProvider{
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subType: subType,
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secretKey: secretKey,
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siteName: "Casibase",
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siteUrl: "https://casibase.org",
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temperature: &temperature,
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topP: &topP,
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}
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return p, nil
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}
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func (p *OpenRouterModelProvider) getProxyClientFromToken() *openrouter.Client {
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config, err := openrouter.DefaultConfig(p.secretKey, p.siteName, p.siteUrl)
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if err != nil {
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panic(err)
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}
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config.HTTPClient = proxy.ProxyHttpClient
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c := openrouter.NewClientWithConfig(config)
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return c
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}
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func (p *OpenRouterModelProvider) QueryText(question string, writer io.Writer, builder *strings.Builder) error {
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client := p.getProxyClientFromToken()
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ctx := context.Background()
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flusher, ok := writer.(http.Flusher)
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if !ok {
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return fmt.Errorf("writer does not implement http.Flusher")
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}
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model := p.subType
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if model == "" {
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model = openrouter.Gpt35Turbo
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}
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promptTokens, err := GetTokenSize(model, question)
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if err != nil {
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return err
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}
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maxTokens := 4097 - promptTokens
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temperature := p.temperature
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topP := p.topP
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respStream, err := client.CreateChatCompletionStream(
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ctx,
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&openrouter.ChatCompletionRequest{
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Model: p.subType,
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Messages: []openrouter.ChatCompletionMessage{
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{
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Role: openrouter.ChatMessageRoleSystem,
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Content: "You are a helpful assistant.",
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},
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{
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Role: openrouter.ChatMessageRoleUser,
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Content: question,
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},
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},
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Stream: false,
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Temperature: temperature,
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TopP: topP,
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MaxTokens: maxTokens,
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},
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)
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if err != nil {
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return err
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}
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defer respStream.Close()
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isLeadingReturn := true
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for {
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completion, streamErr := respStream.Recv()
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if streamErr != nil {
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if streamErr == io.EOF {
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break
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}
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return streamErr
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}
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data := completion.Choices[0].Message.Content
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if isLeadingReturn && len(data) != 0 {
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if strings.Count(data, "\n") == len(data) {
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continue
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} else {
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isLeadingReturn = false
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}
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}
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if _, err = fmt.Fprintf(writer, "event: message\ndata: %s\n\n", data); err != nil {
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return err
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}
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flusher.Flush()
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builder.WriteString(data)
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}
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return nil
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}
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