working sample

This commit is contained in:
Emil Lerch 2021-09-17 13:07:58 -07:00
parent 5cace68da4
commit 602a23b8f4
Signed by untrusted user: lobo
GPG Key ID: A7B62D657EF764F8

View File

@ -1,15 +1,67 @@
const std = @import("std");
const requestz = @import("requestz");
// zig build -Drelease-safe && strip zig-out/bin/bootstrap && zip -j9 function.zip zig-out/bin/bootstrap && aws lambda update-function-code --function-name zig-test --zip-file fileb://function.zip
pub fn main() anyerror!void {
try run(handler);
}
fn handler(allocator: *std.mem.Allocator, event_data: []const u8) ![]const u8 {
_ = allocator;
return event_data;
}
pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u8) !void { // TODO: remove inferred error set?
const prefix = "http://";
const postfix = "/2018-06-01/runtime/invocation";
const lambda_runtime_uri = std.os.getenv("AWS_LAMBDA_RUNTIME_API");
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const allocator = &gpa.allocator;
var client = try requestz.Client.init(allocator);
defer client.deinit();
const url = try std.fmt.allocPrint(allocator, "{s}{s}{s}/next", .{ prefix, lambda_runtime_uri, postfix });
defer allocator.free(url);
var response = try client.get("http://captive.lerch.org/", .{});
std.log.info("{s}", .{response.body});
std.log.info("Event Url: {s}", .{url});
while (true) {
var req_alloc = std.heap.ArenaAllocator.init(allocator);
defer req_alloc.deinit();
const req_allocator = &req_alloc.allocator;
var client = try requestz.Client.init(req_allocator);
// defer client.deinit();
var response = client.get(url, .{}) catch |err| {
// TODO: report error
std.log.err("Get fail: {}", .{err});
continue;
};
defer response.deinit();
var request_id: ?[]const u8 = null;
for (response.headers.items()) |h| {
if (std.mem.indexOf(u8, h.name.value, "Lambda-Runtime-Aws-Request-Id")) |_|
request_id = h.value;
}
if (request_id == null) {
// TODO: report error
std.log.err("Could not find request id: skipping request", .{});
continue;
}
const req_id = request_id.?;
const event_response = event_handler(req_allocator, response.body) catch |err| {
// TODO: report error
std.log.err("Error posting response for request id {s}: {}", .{ req_id, err });
continue;
};
const response_url = try std.fmt.allocPrint(req_allocator, "{s}{s}{s}/{s}/response", .{ prefix, lambda_runtime_uri, postfix, req_id });
// defer req_allocator.free(response_url);
var resp_resp = client.post(response_url, .{ .content = event_response }) catch |err| {
// TODO: report error
std.log.err("Error posting response for request id {s}: {}", .{ req_id, err });
continue;
};
defer resp_resp.deinit();
}
}