more stuff (sorry)

build.zig

@@ -1,26 +1,30 @@
 const builtin = @import("builtin");
 const std = @import("std");
-const pkgs = @import("deps.zig").pkgs;
+const GitRepoStep = @import("GitRepoStep.zig");
+const CopyStep = @import("CopyStep.zig");
 
 pub fn build(b: *std.build.Builder) !void {
-    // Standard target options allows the person running `zig build` to choose
-    // what target to build for. Here we do not override the defaults, which
-    // means any target is allowed, and the default is native. Other options
-    // for restricting supported target set are available.
-    // We want the target to be aarch64-linux for deploys
-    const target = std.zig.CrossTarget{
-        .cpu_arch = .aarch64,
-        .os_tag = .linux,
-    };
+    const zfetch_repo = GitRepoStep.create(b, .{
+        .url = "https://github.com/truemedian/zfetch",
+        // .branch = "0.1.10", // branch also takes tags. Tag 0.1.10 isn't quite new enough
+        .sha = "271cab5da4d12c8f08e67aa0cd5268da100e52f1",
+    });
 
+    const copy_deps = CopyStep.create(
+        b,
+        "zfetch_deps.zig",
+        "libs/zfetch/deps.zig",
+    );
+    copy_deps.step.dependOn(&zfetch_repo.step);
     // Standard release options allow the person running `zig build` to select
     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
     // const mode = b.standardReleaseOptions();
 
     const exe = b.addExecutable("bootstrap", "src/main.zig");
 
-    pkgs.addAllTo(exe);
-    exe.setTarget(target);
+    exe.step.dependOn(&copy_deps.step);
+    exe.addPackage(getZfetchPackage(b, "libs/zfetch") catch unreachable);
+
     exe.setBuildMode(.ReleaseSafe);
     const debug = b.option(bool, "debug", "Debug mode (do not strip executable)") orelse false;
     exe.strip = !debug;
@@ -28,7 +32,7 @@ pub fn build(b: *std.build.Builder) !void {
 
     // TODO: We can cross-compile of course, but stripping and zip commands
     // may vary
-    if (std.builtin.os.tag == .linux) {
+    if (builtin.os.tag == .linux) {
         // Package step
         const package_step = b.step("package", "Package the function");
         package_step.dependOn(b.getInstallStep());
@@ -165,10 +169,46 @@ fn fileExists(file_name: []const u8) bool {
     defer file.close();
     return true;
 }
-fn addArgs(allocator: *std.mem.Allocator, original: []const u8, args: [][]const u8) ![]const u8 {
+fn addArgs(allocator: std.mem.Allocator, original: []const u8, args: [][]const u8) ![]const u8 {
     var rc = original;
     for (args) |arg| {
         rc = try std.mem.concat(allocator, u8, &.{ rc, " ", arg });
     }
     return rc;
 }
+
+fn getDependency(comptime lib_prefix: []const u8, comptime name: []const u8, comptime root: []const u8) !std.build.Pkg {
+    const path = lib_prefix ++ "/libs/" ++ name ++ "/" ++ root;
+
+    // We don't actually care if the dependency has been checked out, as
+    // GitRepoStep will handle that for us
+    // Make sure that the dependency has been checked out.
+    // std.fs.cwd().access(path, .{}) catch |err| switch (err) {
+    //     error.FileNotFound => {
+    //         std.log.err("zfetch: dependency '{s}' not checked out", .{name});
+    //
+    //         return err;
+    //     },
+    //     else => return err,
+    // };
+
+    return std.build.Pkg{
+        .name = name,
+        .path = .{ .path = path },
+    };
+}
+
+pub fn getZfetchPackage(b: *std.build.Builder, comptime lib_prefix: []const u8) !std.build.Pkg {
+    var dependencies = b.allocator.alloc(std.build.Pkg, 4) catch unreachable;
+
+    dependencies[0] = try getDependency(lib_prefix, "iguanaTLS", "src/main.zig");
+    dependencies[1] = try getDependency(lib_prefix, "network", "network.zig");
+    dependencies[2] = try getDependency(lib_prefix, "uri", "uri.zig");
+    dependencies[3] = try getDependency(lib_prefix, "hzzp", "src/main.zig");
+
+    return std.build.Pkg{
+        .name = "zfetch",
+        .path = .{ .path = lib_prefix ++ "/src/main.zig" },
+        .dependencies = dependencies,
+    };
+}

gyro.lock

@@ -1,5 +0,0 @@
-pkg default ducdetronquito http 0.1.3
-pkg default ducdetronquito h11 0.1.1
-github nektro iguanaTLS 953ad821fae6c920fb82399493663668cd91bde7 src/main.zig 953ad821fae6c920fb82399493663668cd91bde7
-github MasterQ32 zig-network 15b88658809cac9022ec7d59449b0cd3ebfd0361 network.zig 15b88658809cac9022ec7d59449b0cd3ebfd0361
-github elerch requestz 1fa8157641300805b9503f98cd201d0959d19631 src/main.zig 1fa8157641300805b9503f98cd201d0959d19631

gyro.zzz

@@ -1,7 +0,0 @@
-deps:
-  requestz:
-    src:
-      github:
-        user: elerch
-        repo: requestz
-        ref: 1fa8157641300805b9503f98cd201d0959d19631

src/lambda.zig

@@ -1,29 +1,34 @@
 const std = @import("std");
-const requestz = @import("requestz");
+const zfetch = @import("zfetch");
 
-pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u8) !void { // TODO: remove inferred error set?
+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;
+    const allocator = gpa.allocator();
 
     const url = try std.fmt.allocPrint(allocator, "{s}{s}{s}/next", .{ prefix, lambda_runtime_uri, postfix });
     defer allocator.free(url);
 
-    std.log.notice("Bootstrap initializing with event url: {s}", .{url});
+    try zfetch.init();
+    defer zfetch.deinit();
+    std.log.info("Bootstrap initializing with event url: {s}", .{url});
 
+    var headers = zfetch.Headers.init(allocator);
+    defer headers.deinit();
     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();
+        const req_allocator = req_alloc.allocator();
+        var req = try zfetch.Request.init(req_allocator, url, null);
+        defer req.deinit();
+
         // Lambda freezes the process at this line of code. During warm start,
         // the process will unfreeze and data will be sent in response to client.get
-        var response = client.get(url, .{}) catch |err| {
+        req.do(.GET, headers, null) catch |err| {
             std.log.err("Get fail: {}", .{err});
             // Documentation says something about "exit immediately". The
             // Lambda infrastrucutre restarts, so it's unclear if that's necessary.
@@ -31,12 +36,17 @@ pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u
             // std.os.exit(1);
             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")) |_|
+        var content_length: ?usize = null;
+        for (req.headers.list.items) |h| {
+            if (std.ascii.eqlIgnoreCase(h.name, "Lambda-Runtime-Aws-Request-Id"))
                 request_id = h.value;
+            if (std.ascii.eqlIgnoreCase(h.name, "Content-Length")) {
+                content_length = std.fmt.parseUnsigned(usize, h.value, 10) catch null;
+                if (content_length == null)
+                    std.log.warn("Error parsing content length value: '{s}'", .{h.value});
+            }
             // TODO: XRay uses an environment variable to do its magic. It's our
             //       responsibility to set this, but no zig-native setenv(3)/putenv(3)
             //       exists. I would kind of rather not link in libc for this,
@@ -54,7 +64,25 @@ pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u
         }
         const req_id = request_id.?;
 
-        const event_response = event_handler(req_allocator, response.body) catch |err| {
+        const reader = req.reader();
+        var buf: [65535]u8 = undefined;
+
+        var resp_payload = std.ArrayList(u8).init(req_allocator);
+        if (content_length) |len| {
+            resp_payload.ensureTotalCapacity(len) catch {
+                std.log.err("Could not allocate memory for body of request id: {s}", .{request_id.?});
+                continue;
+            };
+        }
+
+        defer resp_payload.deinit();
+
+        while (true) {
+            const read = try reader.read(&buf);
+            try resp_payload.appendSlice(buf[0..read]);
+            if (read == 0) break;
+        }
+        const event_response = event_handler(req_allocator, resp_payload.items) catch |err| {
             // Stack trace will return null if stripped
             const return_trace = @errorReturnTrace();
             std.log.err("Caught error: {}. Return Trace: {}", .{ err, return_trace });
@@ -70,27 +98,37 @@ pub fn run(event_handler: fn (*std.mem.Allocator, []const u8) anyerror![]const u
             const content_fmt = try std.fmt.allocPrint(req_allocator, content, .{ "{", @errorName(err), return_trace, "}" });
             defer req_allocator.free(content_fmt);
             std.log.err("Posting to {s}: Data {s}", .{ err_url, content_fmt });
-            var headers = .{.{ "Lambda-Runtime-Function-Error-Type", "HandlerReturned" }};
+
+            var err_req = try zfetch.Request.init(req_allocator, err_url, null);
+            defer err_req.deinit();
+            var err_headers = zfetch.Headers.init(req_allocator);
+            defer err_headers.deinit();
+            err_headers.append(.{
+                .name = "Lambda-Runtime-Function-Error-Type",
+                .value = "HandlerReturned",
+            }) catch |append_err| {
+                std.log.err("Error appending error header to post response for request id {s}: {}", .{ req_id, append_err });
+                std.os.exit(0);
+                continue;
+            };
             // TODO: Determine why this post is not returning
-            var err_resp = client.post(err_url, .{
-                .content = content_fmt,
-                .headers = headers,
-            }) catch |post_err| { // Well, at this point all we can do is shout at the void
+            err_req.do(.POST, err_headers, content_fmt) catch |post_err| { // Well, at this point all we can do is shout at the void
                 std.log.err("Error posting response for request id {s}: {}", .{ req_id, post_err });
                 std.os.exit(0);
                 continue;
             };
             std.log.err("Post complete", .{});
-            defer err_resp.deinit();
             continue;
         };
+        // We should catch these potential alloc errors too
         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| {
+        const response_content = try std.fmt.allocPrint(req_allocator, "{s} \"content\": \"{s}\" {s}", .{ "{", event_response, "}" });
+        var resp_req = try zfetch.Request.init(req_allocator, response_url, null);
+        defer resp_req.deinit();
+        resp_req.do(.POST, headers, response_content) catch |err| {
             // TODO: report error
             std.log.err("Error posting response for request id {s}: {}", .{ req_id, err });
             continue;
         };
-        defer resp_resp.deinit();
     }
 }

src/main.zig

@@ -5,7 +5,7 @@ pub fn main() anyerror!void {
     try lambda.run(handler);
 }
 
-fn handler(allocator: *std.mem.Allocator, event_data: []const u8) ![]const u8 {
+fn handler(allocator: std.mem.Allocator, event_data: []const u8) ![]const u8 {
     _ = allocator;
     return event_data;
 }