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main.go
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main.go
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/*
* @Author: Vincent Yang
* @Date: 2023-07-01 21:45:34
* @LastEditors: Vincent Young
* @LastEditTime: 2024-04-23 14:49:35
* @FilePath: /DeepLX/main.go
* @Telegram: https://t.me/missuo
* @GitHub: https://github.com/missuo
*
* Copyright © 2024 by Vincent, All Rights Reserved.
*/
package main
import (
"fmt"
"log"
"net/http"
"os"
"strings"
"github.com/gin-contrib/cors"
"github.com/gin-gonic/gin"
)
func authMiddleware(cfg *Config) gin.HandlerFunc {
return func(c *gin.Context) {
if cfg.Token != "" {
providedTokenInQuery := c.Query("token")
providedTokenInHeader := c.GetHeader("Authorization")
// Compatability with the Bearer token format
if providedTokenInHeader != "" {
parts := strings.Split(providedTokenInHeader, " ")
if len(parts) == 2 {
if parts[0] == "Bearer" || parts[0] == "DeepL-Auth-Key" {
providedTokenInHeader = parts[1]
} else {
providedTokenInHeader = ""
}
} else {
providedTokenInHeader = ""
}
}
if providedTokenInHeader != cfg.Token && providedTokenInQuery != cfg.Token {
c.JSON(http.StatusUnauthorized, gin.H{
"code": http.StatusUnauthorized,
"message": "Invalid access token",
})
c.Abort()
return
}
}
c.Next()
}
}
func main() {
cfg := initConfig()
fmt.Printf("DeepL X has been successfully launched! Listening on 0.0.0.0:%v\n", cfg.Port)
fmt.Println("Developed by sjlleo <[email protected]> and missuo <[email protected]>.")
if cfg.Token != "" {
fmt.Println("Access token is set.")
}
if cfg.AuthKey != "" {
fmt.Println("DeepL Official Authentication key is set.")
}
// Setting the application to release mode
gin.SetMode(gin.ReleaseMode)
r := gin.Default()
r.Use(cors.Default())
// Defining the root endpoint which returns the project details
r.GET("/", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{
"code": http.StatusOK,
"message": "DeepL Free API, Developed by sjlleo and missuo. Go to /translate with POST. http://github.com/OwO-Network/DeepLX",
})
})
// Free API endpoint, No Pro Account required
r.POST("/translate", authMiddleware(cfg), func(c *gin.Context) {
req := PayloadFree{}
c.BindJSON(&req)
sourceLang := req.SourceLang
targetLang := req.TargetLang
translateText := req.TransText
authKey := cfg.AuthKey
result, err := translateByDeepLX(sourceLang, targetLang, translateText, authKey)
if err != nil {
log.Fatalf("Translation failed: %s", err)
}
if result.Code == http.StatusOK {
c.JSON(http.StatusOK, gin.H{
"code": http.StatusOK,
"id": result.ID,
"data": result.Data,
"alternatives": result.Alternatives,
"source_lang": result.SourceLang,
"target_lang": result.TargetLang,
"method": result.Method,
})
} else {
c.JSON(result.Code, gin.H{
"code": result.Code,
"message": result.Message,
})
}
})
// Pro API endpoint, Pro Account required
r.POST("/v1/translate", authMiddleware(cfg), func(c *gin.Context) {
req := PayloadFree{}
c.BindJSON(&req)
sourceLang := req.SourceLang
targetLang := req.TargetLang
translateText := req.TransText
dlSession := cfg.DlSession
cookie := c.GetHeader("Cookie")
if cookie != "" {
dlSession = strings.Replace(cookie, "dl_session=", "", -1)
}
if dlSession == "" {
c.JSON(http.StatusUnauthorized, gin.H{
"code": http.StatusUnauthorized,
"message": "No dl_session Found",
})
return
} else if strings.Contains(dlSession, ".") {
c.JSON(http.StatusUnauthorized, gin.H{
"code": http.StatusUnauthorized,
"message": "Your account is not a Pro account. Please upgrade your account or switch to a different account.",
})
return
}
result, err := translateByDeepLXPro(sourceLang, targetLang, translateText, dlSession)
if err != nil {
log.Fatalf("Translation failed: %s", err)
}
if result.Code == http.StatusOK {
c.JSON(http.StatusOK, gin.H{
"code": http.StatusOK,
"id": result.ID,
"data": result.Data,
"alternatives": result.Alternatives,
"source_lang": result.SourceLang,
"target_lang": result.TargetLang,
"method": result.Method,
})
} else {
c.JSON(result.Code, gin.H{
"code": result.Code,
"message": result.Message,
})
}
})
// Free API endpoint, Consistent with the official API format
r.POST("/v2/translate", authMiddleware(cfg), func(c *gin.Context) {
authorizationHeader := c.GetHeader("Authorization")
var authKey string
if strings.HasPrefix(authorizationHeader, "DeepL-Auth-Key") {
parts := strings.Split(authorizationHeader, " ")
if len(parts) >= 2 && strings.HasSuffix(parts[len(parts)-1], ":fx") {
authKey = parts[len(parts)-1]
}
}
var translateText string
var targetLang string
translateText = c.PostForm("text")
targetLang = c.PostForm("target_lang")
if translateText == "" || targetLang == "" {
var jsonData struct {
Text []string `json:"text"`
TargetLang string `json:"target_lang"`
}
if err := c.BindJSON(&jsonData); err != nil {
c.JSON(http.StatusBadRequest, gin.H{
"code": http.StatusBadRequest,
"message": "Invalid request payload",
})
return
}
translateText = strings.Join(jsonData.Text, "\n")
targetLang = jsonData.TargetLang
}
result, err := translateByDeepLX("", targetLang, translateText, authKey)
if err != nil {
log.Fatalf("Translation failed: %s", err)
}
if result.Code == http.StatusOK {
c.JSON(http.StatusOK, gin.H{
"translations": []map[string]interface{}{
{
"detected_source_language": result.SourceLang,
"text": result.Data,
},
},
})
} else {
c.JSON(result.Code, gin.H{
"code": result.Code,
"message": result.Message,
})
}
})
// Catch-all route to handle undefined paths
r.NoRoute(func(c *gin.Context) {
c.JSON(http.StatusNotFound, gin.H{
"code": http.StatusNotFound,
"message": "Path not found",
})
})
envPort, ok := os.LookupEnv("PORT")
if ok {
r.Run(":" + envPort)
} else {
r.Run(fmt.Sprintf(":%v", cfg.Port))
}
}