Golang : How to parse plain email text and process email header?
Problem :
Your program receive email in plain text and you need to parse email header information. How to that in Golang?
Solution :
First, convert the plain text into proper mail message type( see http://golang.org/pkg/net/mail/#Message ) with mail.ReadMessage()
function and then process the email header with the associated methods. See example code below.
package main
import (
"bytes"
"fmt"
"net/mail"
)
var emailData = `From: Adam <adam@earth.com>
To: Eve <eve@earth.com>
Subject: Do not eat the apple from that tree!
Date: Fri, 21 Nov 0000 09:55:06 -0600
Message-ID: <1234@garden.earth>
Don't listen to that snake. Don't eat the apple!
`
func main() {
msg, err := mail.ReadMessage(bytes.NewBuffer([]byte(emailData)))
if err != nil {
panic(err)
}
fmt.Println(msg.Header)
// --------------
header := msg.Header
key := "From"
address, err := header.AddressList(key)
if err != nil {
panic(err)
}
fmt.Println(address[0].String())
// --------------
key = "To"
addresses, err := header.AddressList(key)
if err != nil {
panic(err)
}
fmt.Println(addresses[0].String())
// --------------
dateTime, err := header.Date()
if err != nil {
panic(err)
}
fmt.Println(dateTime.String())
// --------------
getSubject := header.Get("Subject")
fmt.Println(getSubject)
}
Output :
map[Message-Id:[1234@garden.earth] From:[Adam adam@earth.com] To:[Eve eve@earth.com] Subject:[Do not eat the apple from that tree!] Date:[Fri,
21 Nov 0000 09:55:06 -0600]]
"Adam" adam@earth.com
"Eve" eve@earth.com
0000-11-21 09:55:06 -0600 -0600
Do not eat the apple from that tree!
References :
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+26.7k Get file path of temporary file in Go
+21.5k Golang : simulate tail -f or read last line from log file example
+12.9k Android Studio : Use image as AlertDialog title with custom layout example
+7.9k Golang : Capture text return from exec function example
+12.9k Golang : Check if a file exist or not
+4.6k Golang : What is StructTag and how to get StructTag's value?
+9.2k Golang : How to tokenize source code with text/scanner package?
+25.9k Golang : Convert CSV data to JSON format and save to file
+19.7k Golang : Create and resolve(read) symbolic links
+10.5k SSL : The certificate is not trusted because no issuer chain was provided
+17.2k Golang : Implement getters and setters
+7.7k Golang : Combine slices but preserve order example