init

.gitignore

@@ -0,0 +1 @@
+dist

README.md

@@ -1 +1,19 @@
-# go-pop3-harvest
+# go-pop3-harvest
+Small golang based commandline app to get all emails from a simple pop3 server.
+
+## Usage 
+```sh
+go-pop3-harvest <host> <user> <pass> <output directory>
+
+# examples
+go-pop3-harvest 10.0.0.1:110 myUser myPw .
+go-pop3-harvest 10.0.0.1:110 myUser myPw outdir
+```
+
+## Install
+* Clone the repo
+* In the repo directory `go install`
+* If you have ~/go/bin in your path you can start using the tool
+
+## Contributing
+I am keen to collaborate, just open a PR or feel free to get in touch (check my profile for contact details).

go.mod

@@ -0,0 +1,5 @@
+module github.com/fstau/go-pop3-harvest
+
+go 1.15
+
+require github.com/simia-tech/go-pop3 v0.0.0-20150626094726-c9c20550a244

go.sum

@@ -0,0 +1,2 @@
+github.com/simia-tech/go-pop3 v0.0.0-20150626094726-c9c20550a244 h1:izFQm9qRSp+dKUYciqiHfYnrpDNqDdiuecqGQryGlRU=
+github.com/simia-tech/go-pop3 v0.0.0-20150626094726-c9c20550a244/go.mod h1:3smecozaRWHAj4cDRRnlRPVb6O44N+3S7K45/C37HpU=

main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/simia-tech/go-pop3"
+)
+
+func write(number int, data []byte, outDir string, user string) {
+	os.MkdirAll(outDir, os.FileMode(0777))
+	filename := fmt.Sprintf("%s/%s-%d", outDir, user, number)
+	ioutil.WriteFile(filename, data, 0644)
+}
+
+func parseArgs() (string, string, string, string) {
+	args := os.Args[1:]
+	if len(args) != 4 {
+		panic("Did not supply enough arguments. Usage: harvestpop3 host user pass output_directory.")
+	}
+	host := args[0]
+	user := args[1]
+	pass := args[2]
+	outDir := args[3]
+
+	fmt.Println(host, user, pass, outDir)
+	return host, user, pass, outDir
+}
+
+func main() {
+	var user string
+	var pass string
+	var host string
+	var outDir string
+
+	host, user, pass, outDir = parseArgs()
+
+	fmt.Println("=== Harvesting Mails ===")
+	client, err := pop3.Dial(host)
+	if err != nil {
+		panic(err)
+	}
+	err = client.Auth(user, pass)
+	if err != nil {
+		panic(err)
+	}
+	messages, _ := client.ListAll()
+	for message := range messages {
+		str, err := client.Retr(uint32(message) + 1)
+		if err != nil {
+			panic(err)
+		}
+		write(message, []byte(str), outDir, user)
+	}
+	fmt.Println("=== DONE ===")
+}

makefile

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+build:
+	env GOOS=darwin GOARCH=amd64 go build -o dist/go-pop3-harvest_darwin_amd64 .
+	env GOOS=linux GOARCH=amd64 go build -o dist/go-pop3-harvest_linux_amd64 .
+	env GOOS=linux GOARCH=386 go build -o dist/go-pop3-harvest_linux_386 .
+	env GOOS=linux GOARCH=arm go build -o dist/go-pop3-harvest_linux_arm .
+	env GOOS=windows GOARCH=amd64 go build -o dist/go-pop3-harvest_windows_amd64.exe .
+	env GOOS=windows GOARCH=386 go build -o dist/go-pop3-harvest_windows_386.exe .