Zig

Upload Binary File from Memory

See more Google Drive Examples

This example demonstrates how to upload a binary file from memory. It uploads the file to a subdirectory of our choosing. 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.

    // This example uses a previously obtained access token having permission for the
    // Google Drive scope.

    const g_auth = try chilkat.AuthGoogle.init();
    defer g_auth.deinit();
    g_auth.setAccessToken("GOOGLE-DRIVE-ACCESS-TOKEN");

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect using TLS.
    const b_auto_reconnect = true;
    try rest.connect("www.googleapis.com", 443, true, b_auto_reconnect);

    // Provide the authentication credentials (i.e. the access token)
    rest.setAuthGoogle(g_auth) catch {};

    // -------------------------------------------------------------------------
    // A multipart upload to Google Drive needs a multipart/related Content-Type
    rest.addHeader("Content-Type", "multipart/related") catch {};

    // Specify each part of the request.

    // The 1st part is JSON with information about the file.
    rest.setPartSelector("1");
    rest.addHeader("Content-Type", "application/json; charset=UTF-8") catch {};

    // Construct the JSON that will contain the metadata about the file data to be uploaded...
    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.appendString("name", "hedgehogs.jpg") catch {};
    json.appendString("description", "A cute photo of two hedgehogs.") catch {};
    json.appendString("mimeType", "image/jpeg") catch {};

    // To place the file in a folder, we must add a parents[] array to the JSON
    // and add the folder ID.
    // In a previous example (see Build Local Metadata Cache
    // we built a local cache to make it easy to lookup file IDs given a file path.
    // Let's find the file ID for the folder "testFolder/abc/123"
    const gd_cache = try chilkat.Cache.init();
    defer gd_cache.deinit();
    gd_cache.setLevel(0);
    gd_cache.addRoot("C:/ckCache/googleDrive");

    const folder_id = gd_cache.fetchText(alloc, "testFolder/abc/123") catch {
        std.debug.print("Filepath not found in cache.\n", .{});
        return;
    };

    const parents = try chilkat.JsonArray.init();
    defer parents.deinit();
    json.appendArray2("parents", parents) catch {};

    parents.addStringAt(-1, folder_id) catch {};

    rest.setMultipartBodyString(try json.emit(alloc)) catch {};

    // The 2nd part is the file content, which will contain the binary image data.
    rest.setPartSelector("2");
    rest.addHeader("Content-Type", "image/jpeg") catch {};

    const fac = try chilkat.FileAccess.init();
    defer fac.deinit();

    // Read a JPG file from the local filesystem.
ERROR: Method not in the Zig package: FileAccess.ReadEntireFile
ERROR: Method not in the Zig package: FileAccess.ReadEntireFile
    jpg_bytes = fac.ERROR();

    // Add the bytes to our upload
ERROR: Method not in the Zig package: Rest.SetMultipartBodyBinary
    _ = rest.ERROR();

    const json_response = rest.fullRequestMultipart(alloc, "POST", "/upload/drive/v3/files?uploadType=multipart") catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    // A successful response will have a status code equal to 200.
    if (rest.getResponseStatusCode() != 200) {
        std.debug.print("response status code = {d}\n", .{rest.getResponseStatusCode()});
        std.debug.print("response status text = {s}\n", .{try rest.getResponseStatusText(alloc)});
        std.debug.print("response header: {s}\n", .{try rest.getResponseHeader(alloc)});
        std.debug.print("response JSON: {s}\n", .{json_response});
        return;
    }

    // Show the JSON response.
    json.load(json_response) catch {};

    // Show the full JSON response.
    json.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // A successful response looks like this:
    // {
    //   "kind": "drive#file",
    //   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
    //   "name": "hedgehogs.jpg",
    //   "mimeType": "image/jpeg"
    // }

    // Get the fileId:
    std.debug.print("fileId: {s}\n", .{try json.stringOf(alloc, "id")});
}