SparkPost Recipient Validation is now available both for existing SparkPost customers and for new, non-sending customers. It uses powerful data-driven analysis on billions of bounce, delivery, and engagement events daily to train our algorithm, bringing you one of the most powerful data-driven email validation tools on the market, so you can send emails smarter.

Artikel ini explains how you can get the most out of the data you’ll receive back on each validated recipient – you’ll see we classify addresses to be “valid”, “risky”, “neutral”, “undeliverable”, and “typo”. We give you a “reason” code and also a “did_you_mean” for known address typos.

Permintaan API

In the SparkPost web app, you can drag & drop an entire list for validation. You can also use API to validate single addresses, so you can build validation right into your address entry workflow.

A while back we came up with a Alat bantu baris perintah Ular sawah using this API. We talked over what we should do for lainnya languages – and here we are! Let’s get started.

This Folder repositori Github has working Recipient Validation API call examples in around a dozen different languages. We try to cover the bahasa terpopuler yang dapat digunakan.

Cara umum untuk mengerjakan semua contoh ini adalah:

• Pick up your key from environment variable SPARKPOST_API_KEY

• Make an API call to /api/v1/validasi-penerima/tunggal/to validate a recipient

• Menerima kembali string respons, yang berisi data berformat JSON dengan hasil

• Cetak hasilnya

SparkPost has perpustakaan for some, but not all of the languages covered here. We chose to write these examples “native” instead, so we could a) cover more languages, b) show how simple the underlying code can be, and c) enable you to see clearly the similarities and differences between languages.

Bash / Curl

Ini memenangkan hadiah untuk kode terpendek - ini hanya menggunakan alat baris perintah "curl" untuk membuat permintaan dan mencetak jawabannya langsung ke terminal. Anda dapat melihat keluarannya berupa sebuah string, berisi JSON; kita tidak mengurai atribut hasil secara individual.

.PHP

Trusty PHP has a few different cara to make HTTPS API calls. Here we chose to use curl_setopt and curl_exec. (https://www.php.net/manual/en/function.curl-exec.php)

If you prefer HTTP_Request2 or pecl_http, then Postman has a built-in code generator that you can use to create similar examples – just set up a working GET request and use the “Code” button.

Python

This uses the popular requests module, which is high-level and therefore easy to use. This example checks the returned status code, converts the results JSON back into a Python dictionary object, and prints the resulting object rather than just a string.

If you prefer the built-in http.client library, Postman can generate code for that too; it’s not much longer.

Node.js

There are banyak yang berbeda node.js HTTP(S) libraries. I started with the older request package (using a callback function) but it’s deprecated and no longer actively maintained.  I chose the newer axios package (using janji). 

Postman can also give you a Javascript native example and Unirest, in case you prefer those.

Karena kode ini membutuhkan akses ke kunci API Anda, kami sangat menyarankan untuk memanggil API kami dari sisi server, jangan pernah dari sisi klien (browser/perangkat seluler).

Go

Go strives toward a philosophy of “one good way” to do something; in this case, using the built-in “batteries included” libraries net/http, encoding/json and others.

The length is due mostly ke explicit error checking clauses if err != nil {} everywhere (tidak ada pengecualian LOL).

Kita juga mendeklarasikan struktur objek hasil dengan tag field, untuk memungkinkan kita "mengurai" string yang dikembalikan JSON. Kita melapisi tag "hasil" dan "kesalahan" untuk memungkinkan kedua jenis pengembalian tersebut.

Saya menyukai kecepatan, keamanan pengetikan, dan kejelasan Go, meskipun kodenya lebih panjang daripada contoh-contoh sebelumnya.

C#

I’m less familiar with C# – to me, it looks quite Java-like, rather than C-like. I was able to put this together following examples shown in the request library System.Net.Http.

Postman can auto-generate example code using RestSharp, if you prefer that.

Ruby

This was my first attempt at Ruby code; I used the Net::http library, and followed contoh ini (which turns out to be very close ke code that Postman auto-generates).

I ran into one language / library oddity that’s worth explaining. Just setting up using a URI that begins “https://” is not enough, you have to specifically set http.use_ssl = true. 

Tanpa ini, kode Anda akan mencoba melakukan permintaan pada port 443 - tetapi tanpa menggunakan SSL/TLS (yaitu secara polos), dan SparkPost akan menolak untuk mengotorisasi permintaan tersebut. Jangan coba-coba melakukan hal ini di rumah, karena kunci API Anda ada di header Otorisasi. Fitur bahasa / pustaka ini terasa tidak aman bagi saya.

Java

I’ve not written any serious Java before, but it was easy to piece this together by following the general approach used in the Perpustakaan SparkPost for other GET calls.

Incidentally, using VS Code as my editor / debugger worked really well for all the languages here, giving me syntax highlighting, debugger stepping / variables viewing etc. InputStreamReaderand BufferedReaderconstructs are similar to (and I assume were copied by) Go.

C / C++

This was a trip down memory lane, as I wrote a lot of C code in the 1990s, some still running deep in telecoms networks somewhere. As the sejarah C predates the modern Web, it’s not surprising that library support is a manual task. We need to download (and compile) a recent version of Libcurl, linking to an OpenSSL library – see the README for actual steps.

Ini terasa seperti pekerjaan yang sangat berat dibandingkan dengan bahasa modern, terutama ketika Go (atau Lua, atau Python, atau yang lainnya) cukup cepat untuk tugas-tugas seperti ini.

The other thing I had forgotten, despite bearing the scars from previous battles, is the scariness of memory allocation! To keep the example simple, I preallocated the URL string length as 1024 characters, and bounds-checked the email address length (using strlen) before we concatenate into it (using strcat).

Kita memperlakukan string Otorisasi dengan kunci API yang digabungkan dengan cara yang sama... meskipun kita tahu bahwa kunci API yang valid tidak akan pernah terlalu panjang... itu bukan perlindungan! Masukan pengguna yang berasal dari variabel lingkungan dapat berupa apa saja. Anda harus memprogram secara defensif.

A more sophisticated developer might use mallocinstead of stack variable allocation, and calculate just how long the joined strings need to be. Having to think about this extra complexity gave me a rasa sakit di dioda di sisi kiri saya; it reminded me of the risks that C programmers run every day, trying to avoid buffer overruns and unexpected side-effects. Which brings us to ..

Lua

Lua is known for its easy coexistence alongside a body of C code, and here at SparkPost, we menggunakan Lua secara ekstensif for Policy customisations inside our Momentum on-premises MTA. You can also use it as a stand-alone scripting language, and it’s pretty nice for that, too.

With Lua 5.3 and the luarocks package manager, we use libraries saku luas and luasec. Showing its C integration heritage, we link to our local OpenSSL library. The luarocks install process calls the gcc compiler (or whatever C compiler you are using), so adding new libraries takes a while.

The Lua code is quite simple. The characters — mark comments.  The function https.request provides beberapa nilai pengembalian (a bit like Python and Go). String concatenation is done with the operator  .. (instead of + in Python).

The response body from this call is handled with the “ltn12” module – see here. That enables efficient handling of data that could be returned in multiple “chunks”. As that article explains:

Pabrik tabel membuat sink yang menyimpan semua data yang diperoleh ke dalam tabel. Data tersebut nantinya dapat digabungkan secara efisien ke dalam satu string dengan fungsi pustaka table.concat.

Contoh kami hanya menggabungkan tabel t dan mencetaknya; Anda dapat menggunakan filter untuk melakukan lebih banyak pemrosesan.

Perl

While Perl is famous for its satu baris, this is not one of them.  Perl was designed for very fast document search and modification, but is actually capable of so much more.  I once wrote an entire Inventory control suite in Perl.  Go figure.   A n y w a y…

This script makes use of LWP::UserAgent and HTTP::Request and optionally the JSON and Data::Dumper packages depending on how you want to see the output. As with all the other scripts on this page, you should pre-set an environment variable SPARKPOST_API_KEYto your generated API key that includes the Recipient Validation function. This script hard codes $recipient = ‘test@gmail.com’ but you can easily add command-line input or consume from a file.

After all the variables are populated, we load an HTTP:Request with GET parameters and send it to the LWP:UserAgent.  The resulting “message” is the result of the email validation test as an array.  You can use JSON and DUMPER to display the result or just pass the array on for additional processing.

VB.net

Visual Basic is not visual and it is not basic (IMHO), but it is #6 on the Indeks bahasa TIOBE so here we go.

There are other ways to do this, but the easiest path to success is to use the Studio Visual SDK in a Windows platform. Fire up Visual Studio, start a new project and select Visual Basic, then select console.app.  Be sure to use the VB version not the C# version – it is easy to miss that in the SDK.

At this point you can edit lines manually or copy/paste the code dari sini into VS and save a bunch of time. In order to make this code work, you need to add a Windows environment variable.  The easiest way to do this is to open a command prompt and use setx.exe like this: 

C:\Users\me>setx SPARKPOST_API_KEY  "142<redacted<redacted>c531c3"

Pada Windows 10, ini diterapkan pada lingkungan pengguna Anda, tetapi tidak langsung tersedia di sesi perintah saat ini, jadi mengujinya dengan "set" tidak akan berhasil, tetapi akan tersedia pada kode. Jika Anda membuat dan menjalankan kode yang disertakan dalam repo, Anda akan melihat hasil validasi.

Karat

Rust is a language for systems and web-services programming that is focused on performance, safety and concurrency. As Wikipedia says, Rust has been the “most loved programming language” in the Stack Overflow Developer Survey since 2016.

The Rust code di repo Github kami uses the reqwest library with tokio async, similar to this example from the Rust cookbook. (That’s not a typo, the reqwest library name is spelled like that). We’ve included a cargo package manager file konfigurasi, so you can build and run with:

cd kargo validasi_penerima_kargo jalankan

Ini akan mengkompilasi paket menjadi kode yang dapat dieksekusi, dan menjalankannya:

Selesai dev [unoptimized + debuginfo] target dalam 0.10 detik Menjalankan `target/debug/rust_recipient_validation` Status: 200 OK Body: : (dll)

The code uses std:envto read the SPARKPOST_API_KEY environment variable. A match clause handles the case where the key is undefined. If all is well, a new reqwest::Klien is created and an async call issued, followed by an Menunggu? (see here). Async, rather than the simpler blocking call, seems to be needed to set request headers. Response body text is read with a second Menunggu?, as per contoh ini.

Summary

Pada artikel ini, kami telah membahas contoh kode Validasi Penerima dalam berbagai bahasa. Inilah permintaan kami kepada Anda.

Let us know if you think we missed your favorite language. We may not have as many examples as Proyek Fibonacci, but we’d love to add some more. Also, if you think our examples can be improved, let us know!