Zig

Xero Download Attachment for an Item (such as an Invoice)

See more Xero Examples

Demonstrates how to download a particular attachment for a particular Xero item. Zig

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

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

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

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

    const json_token = try chilkat.JsonObject.init();
    defer json_token.deinit();
    json_token.loadFile("qa_data/tokens/xero-access-token.json") catch {
        std.debug.print("{s}\n", .{try json_token.getLastErrorText(alloc)});
        return;
    };

    http.setAuthToken(try json_token.stringOf(alloc, "access_token"));

    // Replace the value here with an actual tenant ID obtained from this example:
    // Get Xero Tenant IDs
    http.setRequestHeader("Xero-tenant-id", "83299b9e-5747-4a14-a18a-a6c94f824eb7");

    http.setAccept("application/json");

    // The example to list Xero attachments shows how to get attachment information.
    // Here's a sample JSON response obtained form listing attachments:
    // Your application can get the AttachmentID's and filenames from it.

    // {
    //   "Id": "24bfbcb9-dec9-4d33-835c-8f165d776766",
    //   "Status": "OK",
    //   "ProviderName": "Chilkat2222",
    //   "DateTimeUTC": "\/Date(1587213296972)\/",
    //   "Attachments": [
    //     {
    //       "AttachmentID": "daf106e2-8634-4349-bfcc-86c1df0793b2",
    //       "FileName": "penguins.jpg",
    //       "Url": "https://api.xero.com/api.xro/2.0/Invoices/0032f627-3156-4d30-9b1c-4d3b994dc921/Attachments/penguins.jpg",
    //       "MimeType": "image/jpg",
    //       "ContentLength": 777835
    //     }
    //   ]
    // }

    const url = "https://api.xero.com/api.xro/2.0/{$Endpoint}/{$Guid}/Attachments/{$AttachmentId}";

    // Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
    http.setUrlVar("Endpoint", "Invoices") catch {};

    // Guid is the ID of the item, such as the InvoiceID.
    http.setUrlVar("Guid", "0032f627-3156-4d30-9b1c-4d3b994dc921") catch {};

    // AttachmentId is the ID of the particular attachment to be downloaded
    http.setUrlVar("AttachmentId", "daf106e2-8634-4349-bfcc-86c1df0793b2") catch {};

    // Download the attachment data into bd.
    const bd = try chilkat.BinData.init();
    defer bd.deinit();
    http.quickGetBd(url, bd) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Response Status Code: {d}\n", .{http.getLastStatus()});

    if (http.getLastStatus() == 200) {
        // Success
        // Save to a file..
        try bd.writeFile("qa_output/penguines.jpg");
    } else {
        // Failed.  bd contains error information..
        std.debug.print("{s}\n", .{try bd.getString(alloc, "utf-8")});
    }
}