fix(server): fix header_end index on parsing

src/http/provision.zig

@@ -6,9 +6,13 @@ const Capture = @import("routing_trie.zig").Capture;
 const QueryMap = @import("routing_trie.zig").QueryMap;
 const Request = @import("request.zig").Request;
 const Response = @import("response.zig").Response;
-const Stage = @import("stage.zig").Stage;
 const ServerConfig = @import("server.zig").ServerConfig;
 
+pub const Stage = union(enum) {
+    header,
+    body: usize,
+};
+
 pub const Provision = struct {
     index: usize,
     job: Job,

src/http/server.zig

@@ -889,8 +889,10 @@ pub fn Server(comptime security: Security) type {
                     }
 
                     log.debug("{d} - parsing header", .{provision.index});
+                    // We add start to account for the fact that we are searching
+                    // starting at the index of start.
                     // The +4 is to account for the slice we match.
-                    const header_end: u32 = @intCast(header_ends.? + 4);
+                    const header_end: usize = header_ends.? + start + 4;
                     provision.request.parse_headers(provision.recv_buffer.as_slice()[0..header_end], .{
                         .size_request_max = config.request_bytes_max,
                         .size_request_uri_max = config.request_uri_bytes_max,