How to Convert EML to JPG in Go

While the EML format may work just fine when collaborating with internal partners who have Outlook, it’s not always the best choice if you need to share the file. Converting an EML file to an image format, such as JPG, is often a good option when considering compatibility. To save you from the cumbersome manual conversion process, we will be demonstrating how you can use an API in Go to automatically convert EML to a JPG image array, with one image for each page.

To call the function, you simply need to input the EML file and your API key into the below example code:

package main
import (
     "fmt"
     "bytes"
     "mime/multipart"
     "os"
     "path/filepath"
     "io"
     "net/http"
     "io/ioutil"
)
func main() {
url := "https://api.cloudmersive.com/convert/eml/to/jpg"
     method := "POST"
payload := &bytes.Buffer{}
     writer := multipart.NewWriter(payload)
     file, errFile1 := os.Open("/path/to/file")
     defer file.Close()
     part1,
         errFile1 := writer.CreateFormFile("inputFile",filepath.Base("/path/to/file"))
     _, errFile1 = io.Copy(part1, file)
     if errFile1 != nil {
          fmt.Println(errFile1)
          return
     }
     err := writer.Close()
     if err != nil {
          fmt.Println(err)
          return
     }
client := &http.Client {
     }
     req, err := http.NewRequest(method, url, payload)
if err != nil {
          fmt.Println(err)
          return
     }
     req.Header.Add("quality", "<integer>")
     req.Header.Add("Content-Type", "multipart/form-data")
     req.Header.Add("Apikey", "YOUR-API-KEY-HERE")
req.Header.Set("Content-Type", writer.FormDataContentType())
     res, err := client.Do(req)
     if err != nil {
          fmt.Println(err)
          return
     }
     defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
     if err != nil {
          fmt.Println(err)
          return
     }
     fmt.Println(string(body))
}

And without any further ado, you’re done! If you need to obtain an API key, you can do so by registering for a free account on the Cloudmersive website; this provides 800 monthly calls across any of our APIs.