58 lines
2.3 KiB
Zig
58 lines
2.3 KiB
Zig
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const std = @import("std");
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const requestz = @import("requestz");
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pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u8) !void { // TODO: remove inferred error set?
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const prefix = "http://";
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const postfix = "/2018-06-01/runtime/invocation";
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const lambda_runtime_uri = std.os.getenv("AWS_LAMBDA_RUNTIME_API");
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const allocator = &gpa.allocator;
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const url = try std.fmt.allocPrint(allocator, "{s}{s}{s}/next", .{ prefix, lambda_runtime_uri, postfix });
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defer allocator.free(url);
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std.log.info("Event Url: {s}", .{url});
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while (true) {
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var req_alloc = std.heap.ArenaAllocator.init(allocator);
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defer req_alloc.deinit();
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const req_allocator = &req_alloc.allocator;
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var client = try requestz.Client.init(req_allocator);
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// defer client.deinit();
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var response = client.get(url, .{}) catch |err| {
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// TODO: report error
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std.log.err("Get fail: {}", .{err});
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continue;
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};
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defer response.deinit();
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var request_id: ?[]const u8 = null;
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for (response.headers.items()) |h| {
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if (std.mem.indexOf(u8, h.name.value, "Lambda-Runtime-Aws-Request-Id")) |_|
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request_id = h.value;
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}
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if (request_id == null) {
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// TODO: report error
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std.log.err("Could not find request id: skipping request", .{});
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continue;
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}
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const req_id = request_id.?;
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const event_response = event_handler(req_allocator, response.body) catch |err| {
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// TODO: report error
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std.log.err("Error posting response for request id {s}: {}", .{ req_id, err });
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continue;
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};
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const response_url = try std.fmt.allocPrint(req_allocator, "{s}{s}{s}/{s}/response", .{ prefix, lambda_runtime_uri, postfix, req_id });
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// defer req_allocator.free(response_url);
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var resp_resp = client.post(response_url, .{ .content = event_response }) catch |err| {
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// TODO: report error
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std.log.err("Error posting response for request id {s}: {}", .{ req_id, err });
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continue;
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};
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defer resp_resp.deinit();
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}
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}
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