clean up some memory issues maybe

src/main.zig

@@ -127,7 +127,11 @@ pub fn main() !void {
     var auth_header_buf: [256]u8 = undefined;
     var auth_header = try std.fmt.bufPrint(&auth_header_buf, "Basic {s}", .{auth_encoded});
 
-    const uri = try std.Uri.parse(config.value.loki.url);
+    var url_buf: [256]u8 = undefined;
+    @memcpy(url_buf, config.value.loki.url);
+    var url = url_buf[0..config.value.loki.url];
+
+    const uri = try std.Uri.parse(url);
 
     var client = std.http.Client{ .allocator = allocator };
     defer client.deinit();
@@ -140,12 +144,22 @@ pub fn main() !void {
         port = try std.fmt.bufPrint(&port_buf, "{d}", .{5201});
     }
 
+    var path_buf: [std.fs.MAX_PATH_BYTES]u8 = undefined;
+    var path: []u8 = undefined;
+    if (config.value.iperf3.path) |p| {
+        @memcpy(path_buf, p);
+        path = path_buf[0..p.len];
+    } else {
+        @memcpy(path_buf, "iperf3");
+        path = path_buf[0..6];
+    }
+
     while (true) {
         iperf3_log.info("waiting for connection", .{});
-        // try stderr_bw.flush();
+
         var c = std.process.Child.init(
             &[_][]const u8{
-                if (config.value.iperf3.path) |path| path else "iperf3",
+                path,
                 "--server",
                 "--port",
                 port,
@@ -208,10 +222,6 @@ pub fn main() !void {
         );
         defer data.deinit();
 
-        // try stderr.writeAll(data.items);
-        // try stderr.writeAll("\n");
-        // try stderr_bw.flush();
-
         var content_length_buf: [16]u8 = undefined;
         var content_length = try std.fmt.bufPrint(
             &content_length_buf,
@@ -226,6 +236,8 @@ pub fn main() !void {
         try headers.append("Content-Length", content_length);
 
         var req = try client.request(.POST, uri, headers, .{});
+        defer req.deinit();
+
         try req.start();
         try req.writeAll(data.items);
         try req.finish();