mirror of
https://github.com/songquanpeng/one-api.git
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chore: reorganize adaptor related package
This commit is contained in:
JustSong
273
relay/adaptor/anthropic/main.go
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273
relay/adaptor/anthropic/main.go
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@@ -0,0 +1,273 @@
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package anthropic
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/songquanpeng/one-api/common"
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"github.com/songquanpeng/one-api/common/helper"
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"github.com/songquanpeng/one-api/common/image"
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"github.com/songquanpeng/one-api/common/logger"
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"github.com/songquanpeng/one-api/relay/adaptor/openai"
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"github.com/songquanpeng/one-api/relay/model"
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"io"
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"net/http"
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"strings"
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)
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func stopReasonClaude2OpenAI(reason *string) string {
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if reason == nil {
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return ""
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}
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switch *reason {
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case "end_turn":
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return "stop"
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case "stop_sequence":
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return "stop"
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case "max_tokens":
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return "length"
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default:
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return *reason
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}
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}
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func ConvertRequest(textRequest model.GeneralOpenAIRequest) *Request {
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claudeRequest := Request{
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Model: textRequest.Model,
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MaxTokens: textRequest.MaxTokens,
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Temperature: textRequest.Temperature,
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TopP: textRequest.TopP,
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TopK: textRequest.TopK,
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Stream: textRequest.Stream,
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}
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if claudeRequest.MaxTokens == 0 {
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claudeRequest.MaxTokens = 4096
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}
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// legacy model name mapping
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if claudeRequest.Model == "claude-instant-1" {
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claudeRequest.Model = "claude-instant-1.1"
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} else if claudeRequest.Model == "claude-2" {
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claudeRequest.Model = "claude-2.1"
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}
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for _, message := range textRequest.Messages {
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if message.Role == "system" && claudeRequest.System == "" {
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claudeRequest.System = message.StringContent()
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continue
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}
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claudeMessage := Message{
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Role: message.Role,
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}
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var content Content
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if message.IsStringContent() {
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content.Type = "text"
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content.Text = message.StringContent()
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claudeMessage.Content = append(claudeMessage.Content, content)
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claudeRequest.Messages = append(claudeRequest.Messages, claudeMessage)
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continue
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}
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var contents []Content
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openaiContent := message.ParseContent()
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for _, part := range openaiContent {
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var content Content
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if part.Type == model.ContentTypeText {
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content.Type = "text"
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content.Text = part.Text
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} else if part.Type == model.ContentTypeImageURL {
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content.Type = "image"
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content.Source = &ImageSource{
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Type: "base64",
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}
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mimeType, data, _ := image.GetImageFromUrl(part.ImageURL.Url)
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content.Source.MediaType = mimeType
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content.Source.Data = data
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}
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contents = append(contents, content)
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}
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claudeMessage.Content = contents
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claudeRequest.Messages = append(claudeRequest.Messages, claudeMessage)
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}
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return &claudeRequest
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}
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// https://docs.anthropic.com/claude/reference/messages-streaming
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func streamResponseClaude2OpenAI(claudeResponse *StreamResponse) (*openai.ChatCompletionsStreamResponse, *Response) {
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var response *Response
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var responseText string
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var stopReason string
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switch claudeResponse.Type {
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case "message_start":
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return nil, claudeResponse.Message
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case "content_block_start":
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if claudeResponse.ContentBlock != nil {
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responseText = claudeResponse.ContentBlock.Text
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}
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case "content_block_delta":
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if claudeResponse.Delta != nil {
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responseText = claudeResponse.Delta.Text
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}
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case "message_delta":
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if claudeResponse.Usage != nil {
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response = &Response{
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Usage: *claudeResponse.Usage,
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}
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}
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if claudeResponse.Delta != nil && claudeResponse.Delta.StopReason != nil {
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stopReason = *claudeResponse.Delta.StopReason
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}
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}
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var choice openai.ChatCompletionsStreamResponseChoice
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choice.Delta.Content = responseText
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choice.Delta.Role = "assistant"
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finishReason := stopReasonClaude2OpenAI(&stopReason)
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if finishReason != "null" {
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choice.FinishReason = &finishReason
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}
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var openaiResponse openai.ChatCompletionsStreamResponse
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openaiResponse.Object = "chat.completion.chunk"
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openaiResponse.Choices = []openai.ChatCompletionsStreamResponseChoice{choice}
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return &openaiResponse, response
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}
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func responseClaude2OpenAI(claudeResponse *Response) *openai.TextResponse {
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var responseText string
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if len(claudeResponse.Content) > 0 {
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responseText = claudeResponse.Content[0].Text
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}
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choice := openai.TextResponseChoice{
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Index: 0,
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Message: model.Message{
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Role: "assistant",
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Content: responseText,
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Name: nil,
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},
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FinishReason: stopReasonClaude2OpenAI(claudeResponse.StopReason),
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}
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fullTextResponse := openai.TextResponse{
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Id: fmt.Sprintf("chatcmpl-%s", claudeResponse.Id),
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Model: claudeResponse.Model,
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Object: "chat.completion",
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Created: helper.GetTimestamp(),
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Choices: []openai.TextResponseChoice{choice},
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}
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return &fullTextResponse
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}
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func StreamHandler(c *gin.Context, resp *http.Response) (*model.ErrorWithStatusCode, *model.Usage) {
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createdTime := helper.GetTimestamp()
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scanner := bufio.NewScanner(resp.Body)
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scanner.Split(func(data []byte, atEOF bool) (advance int, token []byte, err error) {
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if atEOF && len(data) == 0 {
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return 0, nil, nil
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}
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if i := strings.Index(string(data), "\n"); i >= 0 {
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return i + 1, data[0:i], nil
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}
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if atEOF {
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return len(data), data, nil
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}
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return 0, nil, nil
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})
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dataChan := make(chan string)
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stopChan := make(chan bool)
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go func() {
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for scanner.Scan() {
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data := scanner.Text()
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if len(data) < 6 {
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continue
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}
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if !strings.HasPrefix(data, "data: ") {
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continue
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}
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data = strings.TrimPrefix(data, "data: ")
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dataChan <- data
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}
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stopChan <- true
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}()
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common.SetEventStreamHeaders(c)
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var usage model.Usage
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var modelName string
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var id string
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c.Stream(func(w io.Writer) bool {
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select {
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case data := <-dataChan:
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// some implementations may add \r at the end of data
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data = strings.TrimSuffix(data, "\r")
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var claudeResponse StreamResponse
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err := json.Unmarshal([]byte(data), &claudeResponse)
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if err != nil {
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logger.SysError("error unmarshalling stream response: " + err.Error())
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return true
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}
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response, meta := streamResponseClaude2OpenAI(&claudeResponse)
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if meta != nil {
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usage.PromptTokens += meta.Usage.InputTokens
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usage.CompletionTokens += meta.Usage.OutputTokens
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modelName = meta.Model
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id = fmt.Sprintf("chatcmpl-%s", meta.Id)
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return true
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}
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if response == nil {
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return true
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}
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response.Id = id
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response.Model = modelName
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response.Created = createdTime
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jsonStr, err := json.Marshal(response)
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if err != nil {
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logger.SysError("error marshalling stream response: " + err.Error())
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return true
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}
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c.Render(-1, common.CustomEvent{Data: "data: " + string(jsonStr)})
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return true
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case <-stopChan:
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c.Render(-1, common.CustomEvent{Data: "data: [DONE]"})
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return false
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}
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})
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_ = resp.Body.Close()
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return nil, &usage
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}
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func Handler(c *gin.Context, resp *http.Response, promptTokens int, modelName string) (*model.ErrorWithStatusCode, *model.Usage) {
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responseBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return openai.ErrorWrapper(err, "read_response_body_failed", http.StatusInternalServerError), nil
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}
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err = resp.Body.Close()
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if err != nil {
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return openai.ErrorWrapper(err, "close_response_body_failed", http.StatusInternalServerError), nil
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}
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var claudeResponse Response
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err = json.Unmarshal(responseBody, &claudeResponse)
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if err != nil {
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return openai.ErrorWrapper(err, "unmarshal_response_body_failed", http.StatusInternalServerError), nil
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}
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if claudeResponse.Error.Type != "" {
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return &model.ErrorWithStatusCode{
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Error: model.Error{
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Message: claudeResponse.Error.Message,
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Type: claudeResponse.Error.Type,
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Param: "",
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Code: claudeResponse.Error.Type,
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},
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StatusCode: resp.StatusCode,
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}, nil
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}
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fullTextResponse := responseClaude2OpenAI(&claudeResponse)
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fullTextResponse.Model = modelName
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usage := model.Usage{
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PromptTokens: claudeResponse.Usage.InputTokens,
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CompletionTokens: claudeResponse.Usage.OutputTokens,
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TotalTokens: claudeResponse.Usage.InputTokens + claudeResponse.Usage.OutputTokens,
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}
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fullTextResponse.Usage = usage
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jsonResponse, err := json.Marshal(fullTextResponse)
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if err != nil {
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return openai.ErrorWrapper(err, "marshal_response_body_failed", http.StatusInternalServerError), nil
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}
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c.Writer.Header().Set("Content-Type", "application/json")
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c.Writer.WriteHeader(resp.StatusCode)
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_, err = c.Writer.Write(jsonResponse)
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return nil, &usage
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}
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