120 timeout if only one upstream

20s timeout for large request
default 60s timeout
2023-11-08 20:42:36 +08:00 · 2023-11-08 20:18:55 +08:00 · 2023-11-08 18:42:35 +08:00 · 2023-11-08 18:40:31 +08:00 · 2023-11-02 09:40:10 +08:00 · 2023-11-01 17:53:57 +08:00
11 changed files with 829 additions and 379 deletions
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}"
+        }
+    ]
+}
--- a/README.md
+++ b/README.md
@@ -1,4 +1,16 @@
-# API 文档
+# openai-api-route 文档
+
+这是一个 OpenAI API 负载均衡的简易工具，使用 golang 原生 reverse proxy 方法转发请求到 OpenAI 上游。遇到上游返回报错或请求超时会自动按顺序选择下一个上游进行重试，直到所有上游都请求失败。
+
+功能包括：
+
+- 自定义 Authorization 验证头
+- 支持所有类型的接口 (`/v1/*`)
+- 提供 Prometheus Metrics 统计接口 (`/v1/metrics`)
+- 按照定义顺序请求 OpenAI 上游
+- 识别 ChatCompletions Stream 请求，针对 Stream 请求使用 5 秒超时。对于其他请求使用60秒超时。
+- 记录完整的请求内容、使用的上游、IP 地址、响应时间以及 GPT 回复文本
+- 请求出错时发送 飞书 或 Matrix 消息通知

 本文档详细介绍了如何使用负载均衡和能力 API 的方法和端点。

@@ -15,37 +27,37 @@
 3. 打开终端，并进入到仓库目录中。

 4. 在终端中执行以下命令来编译代码：
-
+   
   ```
   make
   ```
-
+   
   这将会编译代码并生成可执行文件。

-5. 编译成功后，您可以直接运行以下命令来启动负载均衡和能力 API：
-
+5. 编译成功后，您可以直接运行以下命令来启动负载均衡 API：
+   
   ```
   ./openai-api-route
   ```
-
+   
   默认情况下，API 将会在本地的 8888 端口进行监听。
-
+   
   如果您希望使用不同的监听地址，可以使用 `-addr` 参数来指定，例如：
-
+   
   ```
   ./openai-api-route -addr 0.0.0.0:8080
   ```
-
+   
   这将会将监听地址设置为 0.0.0.0:8080。

 6. 如果数据库不存在，系统会自动创建一个名为 `db.sqlite` 的数据库文件。
-
+   
   如果您希望使用不同的数据库地址，可以使用 `-database` 参数来指定，例如：
-
+   
   ```
   ./openai-api-route -database /path/to/database.db
   ```
-
+   
   这将会将数据库地址设置为 `/path/to/database.db`。

 7. 现在，您已经成功编译并运行了负载均衡和能力 API。您可以根据需要添加上游、管理上游，并使用 API 进行相关操作。
@@ -82,98 +94,4 @@ Usage of ./openai-api-route:
 ./openai-api-route -add -sk sk-xxxxx -endpoint https://api.openai.com/v1
 ```

-您也可以使用 `/admin/upstreams` 的 HTTP 接口进行控制。
-
-另外，您还可以直接编辑数据库中的 `openai_upstreams` 表。
-## 身份验证
-
-### 身份验证中间件流程
-
-1. 从请求头中获取`Authorization`字段的值。
-2. 检查`Authorization`字段的值是否以`"Bearer"`开头。
-   - 如果不是，则返回错误信息："authorization header should start with 'Bearer'"（HTTP 状态码 403）。
-3. 去除`Authorization`字段值开头的`"Bearer"`和前后的空格。
-4. 将剩余的值与预先设置的身份验证配置进行比较。
-   - 如果不匹配，则返回错误信息："wrong authorization header"（HTTP 状态码 403）。
-5. 如果身份验证通过，则返回`nil`。
-
-## 上游管理
-
-### 获取所有上游
-
- URL: `/admin/upstreams`
- 方法: GET
- 权限要求: 需要进行身份验证
- 返回数据类型: JSON
- 请求示例:
-  ```bash
-  curl -X GET -H "Authorization: Bearer access_token" http://localhost:8080/admin/upstreams
-  ```
- 返回示例:
-  ```json
-  [
-    {
-      "ID": 1,
-      "SK": "sk_value",
-      "Endpoint": "endpoint_value"
-    },
-    {
-      "ID": 2,
-      "SK": "sk_value",
-      "Endpoint": "endpoint_value"
-    }
-  ]
-  ```
-
-### 创建新的上游
-
- URL: `/admin/upstreams`
- 方法: POST
- 权限要求: 需要进行身份验证
- 请求数据类型: JSON
- 请求示例:
-  ```bash
-  curl -X POST -H "Authorization: Bearer access_token" -H "Content-Type: application/json" -d '{"SK": "sk_value", "Endpoint": "endpoint_value"}' http://localhost:8080/admin/upstreams
-  ```
- 返回数据类型: JSON
- 返回示例:
-  ```json
-  {
-    "message": "success"
-  }
-  ```
-
-### 删除指定 ID 的上游
-
- URL: `/admin/upstreams/:id`
- 方法: DELETE
- 权限要求: 需要进行身份验证
- 返回数据类型: JSON
- 请求示例:
-  ```bash
-  curl -X DELETE -H "Authorization: Bearer access_token" http://localhost:8080/admin/upstreams/1
-  ```
- 返回示例:
-  ```json
-  {
-    "message": "success"
-  }
-  ```
-
-### 更新指定 ID 的上游
-
- URL: `/admin/upstreams/:id`
- 方法: PUT
- 权限要求: 需要进行身份验证
- 请求数据类型: JSON
- 请求示例:
-  ```bash
-  curl -X PUT -H "Authorization: Bearer access_token" -H "Content-Type: application/json" -d '{"SK": "sk_value", "Endpoint": "endpoint_value"}' http://localhost:8080/admin/upstreams/1
-  ```
- 返回数据类型: JSON
- 返回示例:
-  ```json
-  {
-    "message": "success"
-  }
-  ```
+另外，您还可以直接编辑数据库中的 `openai_upstreams` 表进行 OpenAI 上游的增删改查管理。改动的上游需要重启负载均衡服务后才能生效。
--- a/auth.go
+++ b/auth.go
@@ -20,6 +20,7 @@ func handleAuth(c *gin.Context) error {

 	authorization = strings.Trim(authorization[len("Bearer"):], " ")
 	log.Println("Received authorization", authorization)
+
 	if authorization != authConfig.Value {
 		err = errors.New("wrong authorization header")
 		c.AbortWithError(403, err)
--- a/cors.go
+++ b/cors.go
@@ -1,18 +0,0 @@
-package main
-
-import (
-	"github.com/gin-gonic/gin"
-)
-
-// Middleware function to handle CORS requests
-func handleCORS(c *gin.Context) {
-	c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
-	c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, PATCH")
-	c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Authorization, Content-Type")
-
-	if c.Request.Method == "OPTIONS" {
-		c.AbortWithStatus(200)
-		return
-	}
-
-}
--- a/go.mod
+++ b/go.mod
@@ -4,12 +4,16 @@ go 1.20

 require (
 	github.com/gin-gonic/gin v1.9.1
+	github.com/google/uuid v1.3.0
 	gorm.io/driver/sqlite v1.5.2
 	gorm.io/gorm v1.25.2
 )

 require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bits-and-blooms/bitset v1.2.0 // indirect
 	github.com/bytedance/sonic v1.9.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
@@ -17,7 +21,7 @@ require (
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.14.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/google/uuid v1.3.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
@@ -25,9 +29,16 @@ require (
 	github.com/leodido/go-urn v1.2.4 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
 	github.com/mattn/go-sqlite3 v1.14.17 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/penglongli/gin-metrics v0.1.10 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_golang v1.12.0 // indirect
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.32.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
 	golang.org/x/arch v0.3.0 // indirect
--- a/go.sum
+++ b/go.sum
@@ -1,61 +1,247 @@
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -94,4 +547,14 @@ gorm.io/driver/sqlite v1.5.2 h1:TpQ+/dqCY4uCigCFyrfnrJnrW9zjpelWVoEVNy5qJkc=
 gorm.io/driver/sqlite v1.5.2/go.mod h1:qxAuCol+2r6PannQDpOP1FP6ag3mKi4esLnB/jHed+4=
 gorm.io/gorm v1.25.2 h1:gs1o6Vsa+oVKG/a9ElL3XgyGfghFfkKA2SInQaCyMho=
 gorm.io/gorm v1.25.2/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
--- a/main.go
+++ b/main.go
@@ -1,21 +1,14 @@
 package main

 import (
-	"bytes"
-	"errors"
 	"flag"
 	"fmt"
-	"io"
 	"log"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"strconv"
 	"strings"
 	"time"

 	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
+	"github.com/penglongli/gin-metrics/ginmetrics"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 )
@@ -41,6 +34,11 @@ func main() {
 		log.Fatal("Failed to connect to database")
 	}

+	// load all upstreams
+	upstreams := make([]OPENAI_UPSTREAM, 0)
+	db.Find(&upstreams)
+	log.Println("Load upstreams number:", len(upstreams))
+
 	err = initconfig(db)
 	if err != nil {
 		log.Fatal(err)
@@ -68,9 +66,9 @@ func main() {
 	if *listMode {
 		result := make([]OPENAI_UPSTREAM, 0)
 		db.Find(&result)
-		fmt.Println("SK\tEndpoint\tSuccess\tFailed\tLast Success Time")
+		fmt.Println("SK\tEndpoint")
 		for _, upstream := range result {
-			fmt.Println(upstream.SK, upstream.Endpoint, upstream.SuccessCount, upstream.FailedCount, upstream.LastCallSuccessTime)
+			fmt.Println(upstream.SK, upstream.Endpoint)
 		}
 		return
 	}
@@ -78,6 +76,11 @@ func main() {
 	// init gin
 	engine := gin.Default()

+	// metrics
+	m := ginmetrics.GetMonitor()
+	m.SetMetricPath("/v1/metrics")
+	m.Use(engine)
+
 	// error handle middleware
 	engine.Use(func(c *gin.Context) {
 		c.Next()
@@ -91,14 +94,30 @@ func main() {
 	})

 	// CORS handler
-	engine.Use(handleCORS)
+	engine.OPTIONS("/v1/*any", func(ctx *gin.Context) {
+		header := ctx.Writer.Header()
+		header.Set("Access-Control-Allow-Origin", "*")
+		header.Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, PATCH")
+		header.Set("Access-Control-Allow-Headers", "Origin, Authorization, Content-Type")
+		ctx.AbortWithStatus(200)
+	})

 	// get authorization config from db
 	db.Take(&authConfig, "key = ?", "authorization")

 	engine.POST("/v1/*any", func(c *gin.Context) {
-		begin := time.Now()
-		trackID := uuid.New()
+		record := Record{
+			IP:            c.ClientIP(),
+			CreatedAt:     time.Now(),
+			Authorization: c.Request.Header.Get("Authorization"),
+		}
+		defer func() {
+			if err := recover(); err != nil {
+				log.Println("Error:", err)
+				c.AbortWithError(500, fmt.Errorf("%s", err))
+			}
+		}()
+
 		// check authorization header
 		if !*noauth {
 			if handleAuth(c) != nil {
@@ -106,230 +125,38 @@ func main() {
 			}
 		}

-		// get load balance policy
-		policy := ConfigKV{Value: "main"}
-		db.Take(&policy, "key = ?", "policy")
-		log.Println("policy is", policy.Value)
+		for index, upstream := range upstreams {
+			if upstream.Endpoint == "" || upstream.SK == "" {
+				c.AbortWithError(500, fmt.Errorf("invaild upstream '%s' '%s'", upstream.SK, upstream.Endpoint))
+				continue
+			}

-		upstream := OPENAI_UPSTREAM{}
+			shouldResponse := index == len(upstreams)-1

-		// choose openai upstream
-		switch policy.Value {
-		case "main":
-			db.Order("failed_count, success_count desc").First(&upstream)
-		case "random":
-			// randomly select one upstream
-			db.Order("random()").Take(&upstream)
-		case "random_available":
-			// randomly select one non-failed upstream
-			db.Where("failed_count = ?", 0).Order("random()").Take(&upstream)
-		case "round_robin":
-			// iterates each upstream
-			db.Order("last_call_success_time").First(&upstream)
-		case "round_robin_available":
-			db.Where("failed_count = ?", 0).Order("last_call_success_time").First(&upstream)
-		default:
-			c.AbortWithError(500, fmt.Errorf("unknown load balance policy '%s'", policy.Value))
-		}
+			if len(upstreams) == 1 {
+				upstream.Timeout = 120
+			}

-		// do check
-		log.Println("upstream is", upstream.SK, upstream.Endpoint)
-		if upstream.Endpoint == "" || upstream.SK == "" {
-			c.AbortWithError(500, fmt.Errorf("invaild upstream from '%s' policy", policy.Value))
-			return
-		}
-
-		// reverse proxy
-		remote, err := url.Parse(upstream.Endpoint)
-		if err != nil {
-			c.AbortWithError(500, errors.New("can't parse reverse proxy remote URL"))
-			return
-		}
-		proxy := httputil.NewSingleHostReverseProxy(remote)
-		proxy.Director = nil
-		proxy.Rewrite = func(proxyRequest *httputil.ProxyRequest) {
-			in := proxyRequest.In
-			out := proxyRequest.Out
-
-			// read request body
-			body, err := io.ReadAll(in.Body)
+			err = processRequest(c, &upstream, &record, shouldResponse)
 			if err != nil {
-				c.AbortWithError(502, errors.New("reverse proxy middleware failed to read request body "+err.Error()))
-				return
+				log.Println("Error from upstream", upstream.Endpoint, "should retry", err)
+				continue
 			}

-			// record chat message from user
-			go recordUserMessage(c, db, trackID, body)
-
-			out.Body = io.NopCloser(bytes.NewReader(body))
-
-			out.Host = remote.Host
-			out.URL.Scheme = remote.Scheme
-			out.URL.Host = remote.Host
-			out.URL.Path = in.URL.Path
-			out.Header = http.Header{}
-			out.Header.Set("Host", remote.Host)
-			out.Header.Set("Authorization", "Bearer "+upstream.SK)
-			out.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
+			break
 		}
-		var buf bytes.Buffer
-		var contentType string
-		proxy.ModifyResponse = func(r *http.Response) error {
-			if r.StatusCode != 200 {
-				body, err := io.ReadAll(r.Body)
-				if err != nil {
-					return errors.New("failed to read response from upstream " + err.Error())
-				}
-				return fmt.Errorf("upstream return '%s' with '%s'", r.Status, string(body))
-			}
-			// count success
-			go db.Model(&upstream).Updates(map[string]interface{}{
-				"success_count":          gorm.Expr("success_count + ?", 1),
-				"last_call_success_time": time.Now(),
-			})
-			r.Body = io.NopCloser(io.TeeReader(r.Body, &buf))
-			contentType = r.Header.Get("content-type")
-			return nil
-		}
-		proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
-			log.Println("Error", err, upstream.SK, upstream.Endpoint)

-			// abort to error handle
-			c.AbortWithError(502, err)
-
-			// send notification
-			upstreams := []OPENAI_UPSTREAM{}
-			db.Find(&upstreams)
-			upstreamDescriptions := make([]string, 0)
-			for _, upstream := range upstreams {
-				upstreamDescriptions = append(upstreamDescriptions, fmt.Sprintf("ID: %d, %s: %s 成功次数: %d, 失败次数: %d, 最后成功调用: %s",
-					upstream.ID, upstream.SK, upstream.Endpoint, upstream.SuccessCount, upstream.FailedCount, upstream.LastCallSuccessTime,
-				))
-			}
-			content := fmt.Sprintf("[%s] OpenAI 转发出错 ID: %d... 密钥: [%s] 上游: [%s] 错误: %s\n---\n%s",
-				c.ClientIP(),
-				upstream.ID, upstream.SK[:10], upstream.Endpoint, err.Error(),
-				strings.Join(upstreamDescriptions, "\n"),
-			)
-			go sendMatrixMessage(content)
-			if err.Error() != "context canceled" && r.Response.StatusCode != 400 {
-				// count failed
-				go db.Model(&upstream).Update("failed_count", gorm.Expr("failed_count + ?", 1))
-				go sendFeishuMessage(content)
-			}
-
-			log.Println("response is", r.Response)
+		log.Println("Record result:", record.Status, record.Response)
+		record.ElapsedTime = time.Now().Sub(record.CreatedAt)
+		if db.Create(&record).Error != nil {
+			log.Println("Error to save record:", record)
 		}
-		proxy.ServeHTTP(c.Writer, c.Request)
-		resp, err := io.ReadAll(io.NopCloser(&buf))
-		if err != nil {
-			log.Println("Failed to read from response tee buffer", err)
+		if record.Status != 200 {
+			errMessage := fmt.Sprintf("IP: %s request %s error %d with %s", record.IP, record.Model, record.Status, record.Response)
+			go sendFeishuMessage(errMessage)
+			go sendMatrixMessage(errMessage)
 		}
-		go recordAssistantResponse(contentType, db, trackID, resp, time.Now().Sub(begin))
 	})

-	// ---------------------------------
-	// admin APIs
-	engine.POST("/admin/login", func(c *gin.Context) {
-		// check authorization headers
-		if handleAuth(c) != nil {
-			return
-		}
-		c.JSON(200, gin.H{
-			"message": "success",
-		})
-	})
-	engine.GET("/admin/upstreams", func(c *gin.Context) {
-		// check authorization headers
-		if handleAuth(c) != nil {
-			return
-		}
-		upstreams := make([]OPENAI_UPSTREAM, 0)
-		db.Find(&upstreams)
-		c.JSON(200, upstreams)
-	})
-	engine.POST("/admin/upstreams", func(c *gin.Context) {
-		// check authorization headers
-		if handleAuth(c) != nil {
-			return
-		}
-		newUpstream := OPENAI_UPSTREAM{}
-		err := c.BindJSON(&newUpstream)
-		if err != nil {
-			c.AbortWithError(502, errors.New("can't parse OPENAI_UPSTREAM object"))
-			return
-		}
-		if newUpstream.SK == "" || newUpstream.Endpoint == "" {
-			c.AbortWithError(403, errors.New("can't create new OPENAI_UPSTREAM with empty sk or endpoint"))
-			return
-		}
-		log.Println("Saveing new OPENAI_UPSTREAM", newUpstream)
-		err = db.Create(&newUpstream).Error
-		if err != nil {
-			c.AbortWithError(403, err)
-			return
-		}
-	})
-	engine.DELETE("/admin/upstreams/:id", func(ctx *gin.Context) {
-		// check authorization headers
-		if handleAuth(ctx) != nil {
-			return
-		}
-		id, err := strconv.Atoi(ctx.Param("id"))
-		if err != nil {
-			ctx.AbortWithError(502, err)
-			return
-		}
-		upstream := OPENAI_UPSTREAM{}
-		upstream.ID = uint(id)
-		db.Delete(&upstream)
-		ctx.JSON(200, gin.H{
-			"message": "success",
-		})
-	})
-	engine.PUT("/admin/upstreams/:id", func(c *gin.Context) {
-		// check authorization headers
-		if handleAuth(c) != nil {
-			return
-		}
-		upstream := OPENAI_UPSTREAM{}
-		err := c.BindJSON(&upstream)
-		if err != nil {
-			c.AbortWithError(502, errors.New("can't parse OPENAI_UPSTREAM object"))
-			return
-		}
-		if upstream.SK == "" || upstream.Endpoint == "" {
-			c.AbortWithError(403, errors.New("can't create new OPENAI_UPSTREAM with empty sk or endpoint"))
-			return
-		}
-		id, err := strconv.Atoi(c.Param("id"))
-		if err != nil {
-			c.AbortWithError(502, err)
-			return
-		}
-		upstream.ID = uint(id)
-		log.Println("Saveing new OPENAI_UPSTREAM", upstream)
-		err = db.Create(&upstream).Error
-		if err != nil {
-			c.AbortWithError(403, err)
-			return
-		}
-		c.JSON(200, gin.H{
-			"message": "success",
-		})
-	})
-	engine.GET("/admin/request_records", func(c *gin.Context) {
-		// check authorization headers
-		if handleAuth(c) != nil {
-			return
-		}
-		requestRecords := []Record{}
-		err := db.Order("id desc").Limit(100).Find(&requestRecords).Error
-		if err != nil {
-			c.AbortWithError(502, err)
-			return
-		}
-		c.JSON(200, requestRecords)
-	})
 	engine.Run(*listenAddr)
 }
--- a/process.go
+++ b/process.go
@@ -0,0 +1,223 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"golang.org/x/net/context"
+)
+
+func processRequest(c *gin.Context, upstream *OPENAI_UPSTREAM, record *Record, shouldResponse bool) error {
+	var errCtx error
+
+	record.UpstreamID = upstream.ID
+	record.Response = ""
+	record.Authorization = upstream.SK
+	// [TODO] record request body
+
+	// reverse proxy
+	remote, err := url.Parse(upstream.Endpoint)
+	if err != nil {
+		c.AbortWithError(500, errors.New("can't parse reverse proxy remote URL"))
+		return err
+	}
+
+	haveResponse := false
+
+	proxy := httputil.NewSingleHostReverseProxy(remote)
+	proxy.Director = nil
+	var inBody []byte
+	proxy.Rewrite = func(proxyRequest *httputil.ProxyRequest) {
+		in := proxyRequest.In
+
+		ctx, cancel := context.WithCancel(context.Background())
+		proxyRequest.Out = proxyRequest.Out.WithContext(ctx)
+
+		out := proxyRequest.Out
+
+		// read request body
+		inBody, err = io.ReadAll(in.Body)
+		if err != nil {
+			c.AbortWithError(502, errors.New("reverse proxy middleware failed to read request body "+err.Error()))
+			return
+		}
+
+		// record chat message from user
+		record.Body = string(inBody)
+		requestBody, requestBodyOK := ParseRequestBody(inBody)
+		// record if parse success
+		if requestBodyOK == nil {
+			record.Model = requestBody.Model
+		}
+
+		// set timeout, default is 60 second
+		timeout := 60 * time.Second
+		if requestBodyOK == nil && requestBody.Stream {
+			timeout = 5 * time.Second
+		}
+		if len(inBody) > 1024*128 {
+			timeout = 20 * time.Second
+		}
+		if upstream.Timeout > 0 {
+			// convert upstream.Timeout(second) to nanosecond
+			timeout = time.Duration(upstream.Timeout) * time.Second
+		}
+
+		// timeout out request
+		go func() {
+			time.Sleep(timeout)
+			if !haveResponse {
+				log.Println("Timeout upstream", upstream.Endpoint)
+				errCtx = errors.New("timeout")
+				if shouldResponse {
+					c.AbortWithError(502, errCtx)
+				}
+				cancel()
+			}
+		}()
+
+		out.Body = io.NopCloser(bytes.NewReader(inBody))
+
+		out.Host = remote.Host
+		out.URL.Scheme = remote.Scheme
+		out.URL.Host = remote.Host
+		out.URL.Path = in.URL.Path
+		out.Header = http.Header{}
+		out.Header.Set("Host", remote.Host)
+		if upstream.SK == "asis" {
+			out.Header.Set("Authorization", c.Request.Header.Get("Authorization"))
+		} else {
+			out.Header.Set("Authorization", "Bearer "+upstream.SK)
+		}
+		out.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
+	}
+	var buf bytes.Buffer
+	var contentType string
+	proxy.ModifyResponse = func(r *http.Response) error {
+		haveResponse = true
+		record.Status = r.StatusCode
+		if !shouldResponse && r.StatusCode != 200 {
+			log.Println("upstream return not 200 and should not response", r.StatusCode)
+			return errors.New("upstream return not 200 and should not response")
+		}
+		r.Header.Del("Access-Control-Allow-Origin")
+		r.Header.Del("Access-Control-Allow-Methods")
+		r.Header.Del("Access-Control-Allow-Headers")
+		r.Header.Set("Access-Control-Allow-Origin", "*")
+		r.Header.Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, PATCH")
+		r.Header.Set("Access-Control-Allow-Headers", "Origin, Authorization, Content-Type")
+
+		if r.StatusCode != 200 {
+			body, err := io.ReadAll(r.Body)
+			if err != nil {
+				record.Response = "failed to read response from upstream " + err.Error()
+				return errors.New(record.Response)
+			}
+			record.Response = fmt.Sprintf("openai-api-route upstream return '%s' with '%s'", r.Status, string(body))
+			record.Status = r.StatusCode
+			return fmt.Errorf(record.Response)
+		}
+		// count success
+		r.Body = io.NopCloser(io.TeeReader(r.Body, &buf))
+		contentType = r.Header.Get("content-type")
+		return nil
+	}
+	proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
+		haveResponse = true
+		log.Println("Error", err, upstream.SK, upstream.Endpoint)
+
+		errCtx = err
+
+		// abort to error handle
+		if shouldResponse {
+			c.AbortWithError(502, err)
+		}
+
+		log.Println("response is", r.Response)
+
+		if record.Status == 0 {
+			record.Status = 502
+		}
+		if record.Response == "" {
+			record.Response = err.Error()
+		}
+		if r.Response != nil {
+			record.Status = r.Response.StatusCode
+		}
+
+	}
+
+	proxy.ServeHTTP(c.Writer, c.Request)
+
+	// return context error
+	if errCtx != nil {
+		// fix inrequest body
+		c.Request.Body = io.NopCloser(bytes.NewReader(inBody))
+		return errCtx
+	}
+
+	resp, err := io.ReadAll(io.NopCloser(&buf))
+	if err != nil {
+		record.Response = "failed to read response from upstream " + err.Error()
+		log.Println(record.Response)
+	} else {
+
+		// record response
+		// stream mode
+		if strings.HasPrefix(contentType, "text/event-stream") {
+			for _, line := range strings.Split(string(resp), "\n") {
+				chunk := StreamModeChunk{}
+				line = strings.TrimPrefix(line, "data:")
+				line = strings.TrimSpace(line)
+				if line == "" {
+					continue
+				}
+
+				err := json.Unmarshal([]byte(line), &chunk)
+				if err != nil {
+					log.Println(err)
+					continue
+				}
+
+				if len(chunk.Choices) == 0 {
+					continue
+				}
+				record.Response += chunk.Choices[0].Delta.Content
+			}
+		} else if strings.HasPrefix(contentType, "application/json") {
+			var fetchResp FetchModeResponse
+			err := json.Unmarshal(resp, &fetchResp)
+			if err != nil {
+				log.Println("Error parsing fetch response:", err)
+				return nil
+			}
+			if !strings.HasPrefix(fetchResp.Model, "gpt-") {
+				log.Println("Not GPT model, skip recording response:", fetchResp.Model)
+				return nil
+			}
+			if len(fetchResp.Choices) == 0 {
+				log.Println("Error: fetch response choice length is 0")
+				return nil
+			}
+			record.Response = fetchResp.Choices[0].Message.Content
+		} else {
+			log.Println("Unknown content type", contentType)
+		}
+	}
+
+	if len(record.Body) > 1024*512 {
+		record.Body = ""
+	}
+
+	return nil
+}
--- a/record.go
+++ b/record.go
@@ -6,31 +6,21 @@ import (
 	"strings"
 	"time"

-	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 	"gorm.io/gorm"
 )

 type Record struct {
-	ID          uuid.UUID `gorm:"type:uuid"`
-	CreatedAt   time.Time
-	IP          string
-	Body        string
-	Response    string
-	ElapsedTime time.Duration
-}
-
-func recordUserMessage(c *gin.Context, db *gorm.DB, trackID uuid.UUID, body []byte) {
-	bodyStr := string(body)
-	requestRecord := Record{
-		Body: bodyStr,
-		ID:   trackID,
-		IP:   c.ClientIP(),
-	}
-	err := db.Create(&requestRecord).Error
-	if err != nil {
-		log.Println("Error record request:", err)
-	}
+	ID            int64 `gorm:"primaryKey,autoIncrement"`
+	CreatedAt     time.Time
+	IP            string
+	Body          string `gorm:"serializer:json"`
+	Model         string
+	Response      string
+	ElapsedTime   time.Duration
+	Status        int
+	UpstreamID    uint
+	Authorization string
 }

 type StreamModeChunk struct {
--- a/request_body.go
+++ b/request_body.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"encoding/json"
+)
+
+type RequestBody struct {
+	Model  string `json:"model"`
+	Stream bool   `json:"stream"`
+}
+
+func ParseRequestBody(data []byte) (RequestBody, error) {
+	ret := RequestBody{
+		Stream: false,
+	}
+
+	var requestBody RequestBody
+	err := json.Unmarshal(data, &requestBody)
+	if err != nil {
+		return ret, err
+	}
+
+	return requestBody, nil
+}
--- a/structure.go
+++ b/structure.go
@@ -1,17 +1,13 @@
 package main

 import (
-	"time"
-
 	"gorm.io/gorm"
 )

 // one openai upstream contain a pair of key and endpoint
 type OPENAI_UPSTREAM struct {
 	gorm.Model
-	SK                  string `gorm:"index:idx_sk_endpoint,unique"` // key
-	Endpoint            string `gorm:"index:idx_sk_endpoint,unique"` // endpoint
-	SuccessCount        int64
-	FailedCount         int64
-	LastCallSuccessTime time.Time
+	SK       string `gorm:"index:idx_sk_endpoint,unique"` // key
+	Endpoint string `gorm:"index:idx_sk_endpoint,unique"` // endpoint
+	Timeout  int64  // timeout in seconds
 }
Author	SHA1	Message	Date
heimoshuiyu	6aab4fb44b	120 timeout if only one upstream	2023-11-08 20:42:36 +08:00
heimoshuiyu	b932331bdc	20s timeout for large request	2023-11-08 20:18:55 +08:00
heimoshuiyu	a2c6fa32ed	default 60s timeout	2023-11-08 18:42:35 +08:00
heimoshuiyu	9d8e76bd2d	do not parse unused body	2023-11-08 18:40:31 +08:00
heimoshuiyu	ebc04228c5	update readme	2023-11-02 09:40:10 +08:00
heimoshuiyu	3c4c2b5660	fix error response code	2023-11-01 17:53:57 +08:00
heimoshuiyu	a3fff93f2e	hasResponse on error	2023-11-01 17:34:11 +08:00
heimoshuiyu	c90a18d380	record model name	2023-11-01 17:02:30 +08:00
heimoshuiyu	d9a42842b2	1m timeout for non stream request	2023-11-01 15:55:54 +08:00
heimoshuiyu	5a78c61e5f	timeout for out going request	2023-11-01 15:25:59 +08:00
heimoshuiyu	eced585361	Merge remote-tracking branch 'shanghai/master'	2023-10-31 18:40:33 +08:00
heimoshuiyu	98a15052a2	fix: should response	2023-10-31 18:35:29 +08:00
heimoshuiyu	7572ecf19b	fix: retry with 502	2023-10-31 18:34:58 +08:00
heimoshuiyu	9f2bb46233	update print	2023-10-31 18:34:41 +08:00
heimoshuiyu	d8948d065a	add vscode debug	2023-10-31 18:10:09 +08:00
heimoshuiyu	2c75c392a8	loop through upstreams	2023-10-31 18:10:01 +08:00
heimoshuiyu	acc153ddca	拆分 process	2023-10-31 10:13:20 +08:00
heimoshuiyu	471627712b	/v1/metrics	2023-10-24 00:55:47 +08:00
heimoshuiyu	584103eba3	Merge remote-tracking branch 'shanghai/master'	2023-10-24 00:54:01 +08:00
heimoshuiyu	fd61e49759	add metrics	2023-10-24 00:52:20 +08:00
heimoshuiyu	449d636749	ignore context cancle	2023-10-18 17:57:46 +08:00
heimoshuiyu	34a6bb8515	add feishu and matrix error report	2023-10-18 14:01:24 +08:00
heimoshuiyu	1a1226568f	record error	2023-10-08 15:39:12 +08:00
heimoshuiyu	1e770db740	send notification	2023-09-28 15:58:11 +08:00
heimoshuiyu	de1f9c1e94	remove upstream count	2023-09-28 15:57:30 +08:00
heimoshuiyu	f5dc8147e6	update: readme introduction	2023-09-28 15:52:49 +08:00
heimoshuiyu	c6cf75d2f6	fix: asis	2023-09-28 15:45:29 +08:00
heimoshuiyu	8342e47e4b	asis & readme	2023-09-28 15:42:22 +08:00
heimoshuiyu	043fb3db85	upstream asis	2023-09-16 10:52:33 +08:00
heimoshuiyu	1fcdc59b63	fix: cors in resp	2023-09-15 19:55:05 +08:00
heimoshuiyu	638feaf381	panic recover	2023-09-15 18:22:21 +08:00
heimoshuiyu	7c53581ff2	integer id	2023-09-15 18:00:17 +08:00
heimoshuiyu	687fffead3	fix cors	2023-09-15 12:48:18 +08:00
heimoshuiyu	34beab9429	delete api	2023-09-15 11:57:30 +08:00