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README.md

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+# ChatGPT Web Backend API with Golang
+
+## Run
+
+```bash
+OPEN_AI_KEY=sk-xxxxxxx go run main.go
+```

go.mod

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+module test
+
+go 1.19
+
+require (
+	github.com/gin-gonic/gin v1.9.0
+	github.com/sashabaranov/go-openai v1.4.1
+)
+
+require (
+	github.com/bytedance/sonic v1.8.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.9 // indirect
+	golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

main.go

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+package main
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"github.com/sashabaranov/go-openai"
+	"os"
+)
+
+func main() {
+	// get token
+	token := os.Getenv("OPEN_AI_KEY")
+	r := gin.Default()
+	// /getAns?msg=foobar
+	r.GET("/getAns", func(c *gin.Context) {
+		msg := c.Query("msg")
+		ans := GetChatGPTAns(token, msg)
+		c.JSON(200, gin.H{
+			"answer": ans,
+		})
+	})
+	err := r.Run()
+	if err != nil {
+		return
+	}
+}
+
+func GetChatGPTAns(token string, msg string) string {
+	c := openai.NewClient(token)
+	resp, err := c.CreateChatCompletion(
+		context.Background(),
+		openai.ChatCompletionRequest{
+			Model: openai.GPT3Dot5Turbo,
+			Messages: []openai.ChatCompletionMessage{
+				{
+					Role:    openai.ChatMessageRoleUser,
+					Content: msg,
+				},
+			},
+		},
+	)
+	if err != nil {
+		return ""
+	}
+	return resp.Choices[0].Message.Content
+}