this is not a blog

I like to complain about things that have little to no effect on my life

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5 March 2020

Nice email, mind if I spam it?

by razor

Hey I get it, your portfolio site turned out SUPER cool, and you only used like what, 74 npm packages? Totally reasonable bro, those percentage gauges displaying your 82% html and 69% peepeepoopoo.js skills will absolutely catch everyone’s eye and they will totally wait the 30 seconds it takes your site to load.

You might want to include a nice form, where they can email you as well. You know, where you can write the entire email on the site and just hit send, and then who knows what will happen to whatever you wrote, it’s not like there’s a gmail plugin or something, it’s just 1337coderdude420’s implementation, so cross your fingers.

Now that you are done with all this, time to lean back, and marvel at the flood of spam emails filling your professonal email address, because obviously that’s where you want business inquiries to be sent, right?

While I was writing this, youtube just jumped from sosmula to skrillex for some reason, nice work on that recommendation engine, google.

A big database of personal/portfolio/cv sites of course is github pages, you can host your stuff comppletely free, you get https and it looks kinda professional. Now did you know that github has an api? Two apis to be specific, but I will use graphql if you hold a gun to my head, thanks.

Let’s get some nice emails that could be added to tech mailing lists, considering github users are probably interested about tech.

Naturally I’m gonna use scala, with Li Haoyi’s excellent requests library, play-json and redis because its easier than implementing a file lock.

Note: this got waaaaaay more complicated than I originally intended it.

      def getUrls(n: Int, counter: Int = 0, from_id: Int = 0): List[String] = {
        if (counter == n) List()
        else {
          val data = Json.parse(requests.get(url + from_id, auth = login).text)
          val last = (data \\ "id")[Int]
          (data \\ "login").toList
            .map([String]) ::: getUrls(n, (counter + 1), last)

First I went ahead and fetched a bunch of users, I used the github api first about 3 years ago and since then i have found no way of getting an arbitary number of records, so I just fetch them recursively. Here comes a disclaimer: the code is gonna get VERY functional after this.

        .map("https://" + _ + "")
          case (el, index) => {
            val mail: Future[List[String]] = Future {
              val site = requests.get(el)
              if (site.statusCode == 200) {
                index.toString :: el :: simpleEmailRegex
                  .filter(_.length < 200)
                  .map(el => el.take(el.length - 2))
                  .map(_.replace("mailto:", ""))
              } else List()

              case Success(value) => {
                if (value.length > 2) {
                  println(s"${value.head}: ${value.length}")
                  try {
                    value.tail.foreach(redis.rpush(value.head, _))
                  } catch {
                    case t: Throwable => ()
              case Failure(exception) => ()

Come on, read it. Tell me what it does, beacuse I don’t even know anymore. Nah, not really, but I really got lost in method chains, There are no variables used other than the config vars at all.

After this I just made a separate function to dump redis into a csv, if you are smarter than me, you could use redis-cli --csv {command} >> out.csv.

The regex is VERY simple, you could probably get a lot more hits with some tweaking, it’s just val simpleEmailRegex = "mailto:.*.(\"|')>".r. I’m not very good at coming up with regexes.

I won’t show the emails I collected, with the first 500 pages of the api I already got 400+ addresses. I just want to shame luonet, because what the hell is this?