claude api support

2023-08-13 22:55:04 +08:00
parent b3b4f6bba1
commit 678928cafd
2 changed files with 226 additions and 0 deletions
--- a/pkg/claude/claude.go
+++ b/pkg/claude/claude.go
@@ -0,0 +1,202 @@
+/*
+https://docs.anthropic.com/claude/reference/complete_post
+
+curl --request POST \
+     --url https://api.anthropic.com/v1/complete \
+     --header "anthropic-version: 2023-06-01" \
+     --header "content-type: application/json" \
+     --header "x-api-key: $ANTHROPIC_API_KEY" \
+     --data '
+{
+  "model": "claude-2",
+  "prompt": "\n\nHuman: Hello, world!\n\nAssistant:",
+  "max_tokens_to_sample": 256,
+  "stream": true
+}
+'
+
+{"completion":" Hello! Nice to meet you.","stop_reason":"stop_sequence","model":"claude-2.0","stop":"\n\nHuman:","log_id":"727bded01002627057967d02b3d557a01aa73266849b62f5aa0b97dec1247ed3"}
+
+event: completion
+data: {"completion":"","stop_reason":"stop_sequence","model":"claude-2.0","stop":"\n\nHuman:","log_id":"dfd42341ad08856ff01811885fb8640a1bf977551d8331f81fe9a6c8182c6c63"}
+
+# Model Pricing
+
+Claude Instant |100,000 tokens |Prompt $1.63/million tokens |Completion $5.51/million tokens
+
+Claude 2 |100,000 tokens |Prompt $11.02/million tokens |Completion $32.68/million tokens
+*Claude 1 is still accessible and offered at the same price as Claude 2.
+
+*/
+
+// package anthropic
+package claude
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"opencatd-open/store"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+type MessageModule struct {
+	Assistant string // returned data (do not modify)
+	Human     string // input content
+}
+
+type CompleteRequest struct {
+	Model             string `json:"model,omitempty"`                //*
+	Prompt            string `json:"prompt,omitempty"`               //*
+	MaxTokensToSample int    `json:"max_Tokens_To_Sample,omitempty"` //*
+	StopSequences     string `json:"stop_Sequences,omitempty"`
+	Temperature       int    `json:"temperature,omitempty"`
+	TopP              int    `json:"top_P,omitempty"`
+	TopK              int    `json:"top_K,omitempty"`
+	Stream            bool   `json:"stream,omitempty"`
+	Metadata          struct {
+		UserId string `json:"user_Id,omitempty"`
+	} `json:"metadata,omitempty"`
+}
+
+type CompleteResponse struct {
+	Completion string `json:"completion"`
+	StopReason string `json:"stop_reason"`
+	Model      string `json:"model"`
+	Stop       string `json:"stop"`
+	LogID      string `json:"log_id"`
+}
+
+func Create() {
+	url := "https://api.anthropic.com/v1/complete"
+
+	payload := strings.NewReader("{\"model\":\"claude-2\",\"prompt\":\"\\n\\nHuman: Hello, world!\\n\\nAssistant:\",\"max_tokens_to_sample\":256}")
+
+	req, _ := http.NewRequest("POST", url, payload)
+
+	req.Header.Add("accept", "application/json")
+	req.Header.Add("anthropic-version", "2023-06-01")
+	req.Header.Add("x-api-key", "$ANTHROPIC_API_KEY")
+	req.Header.Add("content-type", "application/json")
+
+	res, _ := http.DefaultClient.Do(req)
+
+	defer res.Body.Close()
+	body, _ := io.ReadAll(res.Body)
+
+	fmt.Println(string(body))
+}
+
+func ClaudeProxy(c *gin.Context) {
+	var chatlog store.Tokens
+	var complete CompleteRequest
+
+	byteBody, _ := io.ReadAll(c.Request.Body)
+	c.Request.Body = io.NopCloser(bytes.NewBuffer(byteBody))
+
+	if err := json.Unmarshal(byteBody, &complete); err != nil {
+		c.AbortWithError(http.StatusBadRequest, err)
+		return
+	}
+
+	key, err := store.SelectKeyCache("anthropic")
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"error": gin.H{
+				"message": err.Error(),
+			},
+		})
+		return
+	}
+
+	chatlog.Model = complete.Model
+
+	token, _ := c.Get("localuser")
+
+	lu, err := store.GetUserByToken(token.(string))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"error": gin.H{
+				"message": err.Error(),
+			},
+		})
+		return
+	}
+	chatlog.UserID = int(lu.ID)
+
+	// todo calc prompt token
+
+	if key.EndPoint == "" {
+		key.EndPoint = "https://api.anthropic.com"
+	}
+	targetUrl, _ := url.ParseRequestURI(key.EndPoint + c.Request.URL.String())
+
+	proxy := httputil.NewSingleHostReverseProxy(targetUrl)
+	proxy.Director = func(req *http.Request) {
+		req.Host = targetUrl.Host
+		req.URL.Scheme = targetUrl.Scheme
+		req.URL.Host = targetUrl.Host
+
+		req.Header.Set("anthropic-version", "2023-06-01")
+		req.Header.Set("content-type", "application/json")
+		req.Header.Set("x-api-key", key.Key)
+	}
+
+	proxy.ModifyResponse = func(resp *http.Response) error {
+		if resp.StatusCode != http.StatusOK {
+			return nil
+		}
+		var byteResp []byte
+		byteResp, _ = io.ReadAll(resp.Body)
+		resp.Body = io.NopCloser(bytes.NewBuffer(byteResp))
+		if complete.Stream != true {
+			var complete_resp CompleteResponse
+
+			if err := json.Unmarshal(byteResp, &complete_resp); err != nil {
+				log.Println(err)
+				return nil
+			}
+		} else {
+			var completion string
+			for {
+				line, err := bufio.NewReader(bytes.NewBuffer(byteResp)).ReadString('\n')
+				if err != nil {
+					if strings.HasPrefix(line, "data:") {
+						line = strings.TrimSpace(strings.TrimPrefix(line, "data:"))
+						if strings.HasSuffix(line, "[DONE]") {
+							break
+						}
+						line = strings.TrimSpace(line)
+						var complete_resp CompleteResponse
+						if err := json.Unmarshal([]byte(line), &complete_resp); err != nil {
+							log.Println(err)
+							break
+						}
+						completion += line
+					}
+				}
+			}
+			log.Println("completion:", completion)
+		}
+		chatlog.TotalTokens = chatlog.PromptCount + chatlog.CompletionCount
+
+		// todo calc cost
+
+		if err := store.Record(&chatlog); err != nil {
+			log.Println(err)
+		}
+		if err := store.SumDaily(chatlog.UserID); err != nil {
+			log.Println(err)
+		}
+		return nil
+	}
+	proxy.ServeHTTP(c.Writer, c.Request)
+}