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| package main
import (
"bytes"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"os"
"path/filepath"
"time"
)
func createReqBody(filePathToConvert string) (string, io.Reader, error) {
var err error
buf := new(bytes.Buffer)
bw := multipart.NewWriter(buf)
f, err := os.Open(filePathToConvert)
if err != nil {
return "", nil, err
}
defer f.Close()
lossyField, _ := bw.CreateFormField("lossy")
lossyField.Write([]byte("true"))
_, fileName := filepath.Split(filePathToConvert)
fw1, _ := bw.CreateFormFile("file", fileName)
io.Copy(fw1, f)
bw.Close()
return bw.FormDataContentType(), buf, nil
}
func submitWebPConversionTask(filePath string, rapidApiKey string) (string, error) {
contType, reader, err := createReqBody(filePath)
if err != nil {
return "", err
}
req, err := http.NewRequest("POST", "https://image-converter4.p.rapidapi.com/submitWebPConversionTask", reader)
req.Header.Add("Content-Type", contType)
req.Header.Add("X-RapidAPI-Key", rapidApiKey)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil || resp.StatusCode != 200 {
fmt.Println("Cannot upload image to convert error:", err)
return "", err
}
defer resp.Body.Close()
b, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(b), nil
}
func getConversionTaskStatus(taskId string, rapidApiKey string) (string, error) {
url := fmt.Sprintf("https://image-converter4.p.rapidapi.com/getConversionTaskStatus?taskId=%s", taskId)
req, err := http.NewRequest("GET", url, nil)
req.Header.Add("X-RapidAPI-Key", rapidApiKey)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil || resp.StatusCode != 200 {
fmt.Println("Cannot check conversion status of task with error:", err)
return "", err
}
defer resp.Body.Close()
b, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(b), nil
}
func downloadResult(taskId string, rapidApiKey string) ([]byte, error) {
url := fmt.Sprintf("https://image-converter4.p.rapidapi.com/downloadResult?taskId=%s", taskId)
req, err := http.NewRequest("GET", url, nil)
req.Header.Add("X-RapidAPI-Key", rapidApiKey)
client := &http.Client{}
resp, err := client.Do(req)
if err != nil || resp.StatusCode != 200 {
fmt.Println("Cannot download converted file with error:", err)
return nil, err
}
defer resp.Body.Close()
b, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return b, nil
}
func main() {
filePathToConvert := "<PATH OF SOURCE IMAGE TO CONVERT>"
rapidApiKey := "<YOUR RAPIDAPI KEY HERE>"
taskId, err := submitWebPConversionTask(filePathToConvert, rapidApiKey)
if err != nil {
panic(err)
}
retryCount := 0
for retryCount < 100 {
retryCount++
time.Sleep(5 * time.Second)
status, err := getConversionTaskStatus(taskId, rapidApiKey)
if err != nil {
panic(err)
}
if status == "Completed" {
fileBytes, err := downloadResult(taskId, rapidApiKey)
if err != nil {
panic(err)
}
err = os.WriteFile("final_image.webp", fileBytes, 0644)
if err != nil {
panic(err)
}
break
} else if status == "Waiting" {
continue
} else if status == "Failed" {
panic(errors.New("Cannot convert image"))
} else {
panic(errors.New("Cannot convert image"))
}
}
}
|