90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
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// Author: wpcarro@gmail.com
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//
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// Wirelessly transfer RFC documents to your Kindle to device for an alternative
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// medium for reading.
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//
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// Usage:
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// ```shell
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// > go run rfcToKindle.go -document rfc6479 -recipient username@kindle.com
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// ```
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//
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// This uses `sendgmr` to send the file to the Kindle. Make sure:
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// 1. That `sendgmr` is installed and available on $PATH.
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// 2. That it is configured to work with your preferred email address.
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// 3. That the email address `sendgmr` is configured to use is whitelisted in
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// your Kindle "Personal Document Settings".
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package main
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import (
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"os/exec"
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"strings"
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)
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func main() {
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document := flag.String("document", "", "(Required) The name of the document to fetch. For example \"RFC6479\".")
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recipient := flag.String("recipient", "", "(Required) The email address of the Kindle device.")
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subject := flag.String("subject", "", "(Optional) The email address of the Kindle device.")
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flag.Parse()
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if *document == "" {
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// TODO: Is log.Fatal the best function to use here?
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log.Fatal("-document cannot be empty. See -help for more information.")
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}
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if *recipient == "" {
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log.Fatal("-recipient cannot be empty. See -help for more information.")
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}
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*document = strings.ToLower(*document)
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url := fmt.Sprintf("https://www.ietf.org/rfc/%s.txt", *document)
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resp, err := http.Get(url)
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fmt.Printf("Downloading %s ... ", url)
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if err != nil {
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log.Fatal(err)
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}
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defer resp.Body.Close()
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f, err := ioutil.TempFile("", fmt.Sprintf("%s-*.txt", *document))
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if err != nil {
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log.Fatal(err)
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}
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// TODO: Verify if this is cleaning up or not.
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defer os.Remove(f.Name())
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_, err = io.Copy(f, resp.Body)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println("done.")
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if *subject == "" {
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*subject = fmt.Sprintf("%s - Sent from rfcToKindle.go", *document)
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}
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// Although I couldn't find it documented anywhere, the email sent to the
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// Kindle must have a body, even if the body isn't used for anything.
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fmt.Printf("Emailing %s to %s ... ", f.Name(), *recipient)
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cmd := exec.Command("sendgmr",
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fmt.Sprintf("--to=%s", *recipient),
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fmt.Sprintf("--body_file=%s", f.Name()),
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fmt.Sprintf("--subject=%s", *subject),
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fmt.Sprintf("--attachment_files=%s", f.Name()))
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err = cmd.Run()
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println("done.")
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os.Exit(0)
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}
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