Zig

Get GMail Message Metadata

See more GMail REST API Examples

Demonstrates how to get the metadata for each message in a list of message IDs. 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();

    http.setAuthToken("ACCESS_TOKEN");

    http.setAccept("application/json");

    // Let's say we have the following JSON containing a list of message ID's

    // {
    //   "messages": [
    //     {
    //       "id": "1712bc1dc22da2a2",
    //       "threadId": "1712bc1dc22da2a2"
    //     },
    //     {
    //       "id": "1712b94fa2168040",
    //       "threadId": "1712b94fa2168040"
    //     },
    //     {
    //       "id": "1711e4bd96ded05e",
    //       "threadId": "1711e4bd96ded05e"
    //     },
    //     {
    //       "id": "1711de0d119e751e",
    //       "threadId": "1711de0d119e751e"
    //     },
    //     {
    //       "id": "1711c81a43050f59",
    //       "threadId": "1711c81a43050f59"
    //     },
    //     {
    //       "id": "1711c2c1516abce5",
    //       "threadId": "1711c2c1516abce5"
    //     },
    //     {
    //       "id": "1711c161e655c915",
    //       "threadId": "1711c161e655c915"
    //     },
    //     {
    //       "id": "171199c6e454558c",
    //       "threadId": "171199c6e454558c"
    //     },
    //     {
    //       "id": "17119474c8aa248e",
    //       "threadId": "17119474c8aa248e"
    //     }
    //   ],
    //   "nextPageToken": "16710921492249671162",
    //   "resultSizeEstimate": 309
    // }

    // Normally your program would have the above JSON in a string variable (obtained from a previous call to get
    // a list of message IDs from a GMail mailbox).  In this example, we'll load the JSON from a file.
    const json_msg_ids = try chilkat.JsonObject.init();
    defer json_msg_ids.deinit();
    try json_msg_ids.loadFile("qa_data/json/gmail_message_ids.json");

    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();

    var id: [:0]const u8 = "";
    var i: i32 = 0;
    const count_i = json_msg_ids.sizeOfArray("messages");
    while (i < count_i) {
        json_msg_ids.setI(i);
        id = try json_msg_ids.stringOf(alloc, "messages[i].id");

        // Get the metadata for this message ID.
        http.setUrlVar("id", id) catch {};

        http.httpNoBody("GET", "https://www.googleapis.com/gmail/v1/users/userId/messages/{$id}?format=metadata", resp) catch {
            std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
            return;
        };

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

        const json_response = try chilkat.JsonObject.init();
        defer json_response.deinit();
        json_response.load(try resp.getBodyStr(alloc)) catch {};
        json_response.setEmitCompact(false);
        std.debug.print("{s}\n", .{try json_response.emit(alloc)});

        if (resp.getStatusCode() != 200) {
            std.debug.print("Failed.\n", .{});
            return;
        }

        i = i + 1;
    }

    // Use this online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON
}