Zig

SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    const http = try chilkat.Http.init();
    defer http.deinit();

    // Implements the following CURL command:

    // curl --request POST \
    //   --url https://api.sendgrid.com/v3/mail/send \
    //   --header 'authorization: Bearer YOUR_API_KEY' \
    //   --header 'Content-Type: application/json' \
    //   --data '{"personalizations": [{"to": [{"email": "recipient@example.com"}]}],"from": {"email": "sender@example.com"},"subject":"Hello, World!","content": [{"type": "text/html","value": "Hey,<br>Please find attachment."}], "attachments": [{"content": "BASE64_ENCODED_CONTENT", "type": "text/plain", "filename": "attachment.txt"}]}'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "personalizations": [
    //     {
    //       "to": [
    //         {
    //           "email": "recipient@example.com"
    //         }
    //       ]
    //     }
    //   ],
    //   "from": {
    //     "email": "sender@example.com"
    //   },
    //   "subject": "Hello, World!",
    //   "content": [
    //     {
    //       "type": "text/html",
    //       "value": "Hey,<br>Please find attachment."
    //     }
    //   ],
    //   "attachments": [
    //     {
    //       "content": "BASE64_ENCODED_CONTENT",
    //       "type": "text/plain",
    //       "filename": "attachment.txt"
    //     }
    //   ]
    // }

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.updateString("personalizations[0].to[0].email", "recipient@example.com") catch {};
    json.updateString("from.email", "sender@example.com") catch {};
    json.updateString("subject", "Hello, World!") catch {};
    json.updateString("content[0].type", "text/html") catch {};
    json.updateString("content[0].value", "Hey,<br>Please find attachment.") catch {};

    // Load a file to be attached.
    const bd = try chilkat.BinData.init();
    defer bd.deinit();
    try bd.loadFile("qa_data/pdf/hello.pdf");

    json.updateString("attachments[0].content", try bd.getEncoded(alloc, "base64")) catch {};
    json.updateString("attachments[0].type", "application/pdf") catch {};
    json.updateString("attachments[0].filename", "hello.pdf") catch {};

    // Adds the "Authorization: Bearer YOUR_API_KEY" header.
    http.setAuthToken("YOUR_API_KEY");

    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpJson("POST", "https://api.sendgrid.com/v3/mail/send", json, "application/json", resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const resp_status_code = resp.getStatusCode();
    std.debug.print("Response Status Code = {d}\n", .{resp_status_code});
    if (resp_status_code != 202) {
        std.debug.print("Response Header:\n", .{});
        std.debug.print("{s}\n", .{try resp.getHeader(alloc)});
        std.debug.print("Response Body:\n", .{});
        std.debug.print("{s}\n", .{try resp.getBodyStr(alloc)});
        std.debug.print("Failed.\n", .{});
        return;
    }

    std.debug.print("Success.\n", .{});
}