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feat: result returns source and target lang. #64
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@missuo
missuo committed Sep 14, 2023
1 parent eb6afa8 commit 6d1a789
Showing 1 changed file with 121 additions and 103 deletions.
224 changes: 121 additions & 103 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
* @Author: Vincent Young
* @Date: 2023-07-01 21:45:34
* @LastEditors: Vincent Young
* @LastEditTime: 2023-07-03 00:50:36
* @LastEditTime: 2023-09-14 13:34:42
* @FilePath: /DeepLX/main.go
* @Telegram: https://t.me/missuo
*
Expand Down Expand Up @@ -122,152 +122,170 @@ type ResData struct {
}

func main() {
// parse flags
// Parsing the command-line flags
flag.Parse()

// display information
// Displaying initialization information
fmt.Printf("DeepL X has been successfully launched! Listening on 0.0.0.0:%v\n", port)
fmt.Println("Made by sjlleo and missuo.")
fmt.Println("Developed by sjlleo <[email protected]> and missuo <[email protected]>.")

// create a random id
// Generating a random ID
id := getRandomNumber()

// set release mode
// 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(200, gin.H{
"code": 200,
"message": "DeepL Free API, Made by sjlleo and missuo. Go to /translate with POST. http://github.com/OwO-Network/DeepLX",
"message": "DeepL Free API, Developed by sjlleo <[email protected]> and missuo <[email protected]>. Go to /translate with POST. http://github.com/OwO-Network/DeepLX",
})
})

// Defining the translation endpoint which receives translation requests and returns translations
r.POST("/translate", func(c *gin.Context) {
reqj := ResData{}
c.BindJSON(&reqj)

// Extracting details from the request JSON
sourceLang := reqj.SourceLang
targetLang := reqj.TargetLang
translateText := reqj.TransText

// If source language is not specified, auto-detect it
if sourceLang == "" {
lang := whatlanggo.DetectLang(translateText)
deepLLang := strings.ToUpper(lang.Iso6391())
sourceLang = deepLLang
}
// If target language is not specified, set it to English
if targetLang == "" {
targetLang = "EN"
}
// Handling empty translation text
if translateText == "" {
c.JSON(http.StatusNotFound, gin.H{
"code": http.StatusNotFound,
"message": "No Translate Text Found",
})
return
}
// Preparing the request data for the DeepL API
url := "https://www2.deepl.com/jsonrpc"
id = id + 1
postData := initData(sourceLang, targetLang)
text := Text{
Text: translateText,
RequestAlternatives: 3,
}
postData.ID = id
postData.Params.Texts = append(postData.Params.Texts, text)
postData.Params.Timestamp = getTimeStamp(getICount(translateText))

// Marshalling the request data to JSON and making necessary string replacements
post_byte, _ := json.Marshal(postData)
postStr := string(post_byte)

// Adding spaces to the JSON string based on the ID to adhere to DeepL's request formatting rules
if (id+5)%29 == 0 || (id+3)%13 == 0 {
postStr = strings.Replace(postStr, "\"method\":\"", "\"method\" : \"", -1)
} else {
url := "https://www2.deepl.com/jsonrpc"
id = id + 1
postData := initData(sourceLang, targetLang)
text := Text{
Text: translateText,
RequestAlternatives: 3,
}
// set id
postData.ID = id
// set text
postData.Params.Texts = append(postData.Params.Texts, text)
// set timestamp
postData.Params.Timestamp = getTimeStamp(getICount(translateText))
post_byte, _ := json.Marshal(postData)
postStr := string(post_byte)

// add space if necessary
if (id+5)%29 == 0 || (id+3)%13 == 0 {
postStr = strings.Replace(postStr, "\"method\":\"", "\"method\" : \"", -1)
} else {
postStr = strings.Replace(postStr, "\"method\":\"", "\"method\": \"", -1)
}

post_byte = []byte(postStr)
reader := bytes.NewReader(post_byte)
request, err := http.NewRequest("POST", url, reader)
if err != nil {
log.Println(err)
return
}

// Set Headers
request.Header.Set("Content-Type", "application/json")
request.Header.Set("Accept", "*/*")
request.Header.Set("x-app-os-name", "iOS")
request.Header.Set("x-app-os-version", "16.3.0")
request.Header.Set("Accept-Language", "en-US,en;q=0.9")
request.Header.Set("Accept-Encoding", "gzip, deflate, br")
request.Header.Set("x-app-device", "iPhone13,2")
request.Header.Set("User-Agent", "DeepL-iOS/2.9.1 iOS 16.3.0 (iPhone13,2)")
request.Header.Set("x-app-build", "510265")
request.Header.Set("x-app-version", "2.9.1")
request.Header.Set("Connection", "keep-alive")

client := &http.Client{}
resp, err := client.Do(request)
if err != nil {
log.Println(err)
return
}
defer resp.Body.Close()

var bodyReader io.Reader
switch resp.Header.Get("Content-Encoding") {
case "br":
bodyReader = brotli.NewReader(resp.Body)
default:
bodyReader = resp.Body
}

body, err := io.ReadAll(bodyReader)

// body, _ := io.ReadAll(resp.Body)
res := gjson.ParseBytes(body)

// display response
// fmt.Println(res)
if res.Get("error.code").String() == "-32600" {
log.Println(res.Get("error").String())
c.JSON(http.StatusNotAcceptable, gin.H{
"code": http.StatusNotAcceptable,
"message": "Invalid targetLang",
})
return
}

if resp.StatusCode == http.StatusTooManyRequests {
c.JSON(http.StatusTooManyRequests, gin.H{
"code": http.StatusTooManyRequests,
"message": "Too Many Requests",
})
} else {
var alternatives []string
res.Get("result.texts.0.alternatives").ForEach(func(key, value gjson.Result) bool {
alternatives = append(alternatives, value.Get("text").String())
return true
})
c.JSON(http.StatusOK, gin.H{
"code": http.StatusOK,
"id": id,
"data": res.Get("result.texts.0.text").String(),
"alternatives": alternatives,
})
}
postStr = strings.Replace(postStr, "\"method\":\"", "\"method\": \"", -1)
}

// Creating a new HTTP POST request with the JSON data as the body
post_byte = []byte(postStr)
reader := bytes.NewReader(post_byte)
request, err := http.NewRequest("POST", url, reader)
if err != nil {
log.Println(err)
return
}

// Setting HTTP headers to mimic a request from the DeepL iOS App
request.Header.Set("Content-Type", "application/json")
request.Header.Set("Accept", "*/*")
request.Header.Set("x-app-os-name", "iOS")
request.Header.Set("x-app-os-version", "16.3.0")
request.Header.Set("Accept-Language", "en-US,en;q=0.9")
request.Header.Set("Accept-Encoding", "gzip, deflate, br")
request.Header.Set("x-app-device", "iPhone13,2")
request.Header.Set("User-Agent", "DeepL-iOS/2.9.1 iOS 16.3.0 (iPhone13,2)")
request.Header.Set("x-app-build", "510265")
request.Header.Set("x-app-version", "2.9.1")
request.Header.Set("Connection", "keep-alive")

// Making the HTTP request to the DeepL API
client := &http.Client{}
resp, err := client.Do(request)
if err != nil {
log.Println(err)
return
}
defer resp.Body.Close()

// Handling potential Brotli compressed response body
var bodyReader io.Reader
switch resp.Header.Get("Content-Encoding") {
case "br":
bodyReader = brotli.NewReader(resp.Body)
default:
bodyReader = resp.Body
}

// Reading the response body and parsing it with gjson
body, err := io.ReadAll(bodyReader)
// body, _ := io.ReadAll(resp.Body)
res := gjson.ParseBytes(body)

// Handling various response statuses and potential errors
if res.Get("error.code").String() == "-32600" {
log.Println(res.Get("error").String())
c.JSON(http.StatusNotAcceptable, gin.H{
"code": http.StatusNotAcceptable,
"message": "Invalid targetLang",
})
return
}

if resp.StatusCode == http.StatusTooManyRequests {
c.JSON(http.StatusTooManyRequests, gin.H{
"code": http.StatusTooManyRequests,
"message": "Too Many Requests",
})
} else {
var alternatives []string
res.Get("result.texts.0.alternatives").ForEach(func(key, value gjson.Result) bool {
alternatives = append(alternatives, value.Get("text").String())
return true
})
c.JSON(http.StatusOK, gin.H{
"code": http.StatusOK,
"id": id,
"data": res.Get("result.texts.0.text").String(),
"alternatives": alternatives,
"source_lang": sourceLang,
"target_lang": targetLang,
})
}
})

// 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",
})
})

// Determining which port to run the server on, with a fallback to a default port
envPort, ok := os.LookupEnv("PORT")
if ok {
r.Run(":" + envPort)
} else {
// by default, listen and serve on 0.0.0.0:1188
r.Run(fmt.Sprintf(":%v", port))
}

}

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