refactored, pre-buffer reuse

2026-03-15 14:31:52 +01:00
parent f1beb160aa
commit b0d606cb5f
64 changed files with 888 additions and 400 deletions
@@ -0,0 +1,47 @@
+package dev.relism.http;
+
+import lombok.Getter;
+import java.nio.charset.StandardCharsets;
+
+@Getter
+public enum HttpMethod {
+    GET, POST, PUT, DELETE, PATCH, OPTIONS, HEAD, TRACE, CONNECT, PURGE;
+
+    private static final HttpMethod[] VALUES = values();
+    private final byte[] bytes;
+
+    HttpMethod() {
+        this.bytes = this.name().getBytes(StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Resolves the HttpMethod from a byte buffer segment using O(1) dispatch.
+     * Extremely fast, zero allocations, branch-prediction friendly.
+     */
+    public static HttpMethod fromBytes(byte[] buf, int off, int len) {
+        if (len == 0) return null;
+        
+        return switch (buf[off]) {
+            case 'G' -> (len == 3 && buf[off + 1] == 'E' && buf[off + 2] == 'T') ? GET : null;
+            case 'P' -> {
+                if (len == 3 && buf[off + 1] == 'U' && buf[off + 2] == 'T') yield PUT;
+                if (len == 4 && buf[off + 1] == 'O' && buf[off + 2] == 'S' && buf[off + 3] == 'T') yield POST;
+                if (len == 5 && buf[off + 1] == 'A' && buf[off + 2] == 'T' && buf[off + 3] == 'C' && buf[off + 4] == 'H') yield PATCH;
+                if (len == 5 && buf[off + 1] == 'U' && buf[off + 2] == 'R' && buf[off + 3] == 'G' && buf[off + 4] == 'E') yield PURGE;
+                yield null;
+            }
+            case 'D' -> (len == 6 && buf[off + 1] == 'E' && buf[off + 2] == 'L' && buf[off + 3] == 'E' && buf[off + 4] == 'T' && buf[off + 5] == 'E') ? DELETE : null;
+            case 'O' -> (len == 7 && buf[off + 1] == 'P' && buf[off + 2] == 'T' && buf[off + 3] == 'I' && buf[off + 4] == 'O' && buf[off + 5] == 'N' && buf[off + 6] == 'S') ? OPTIONS : null;
+            case 'H' -> (len == 4 && buf[off + 1] == 'E' && buf[off + 2] == 'A' && buf[off + 3] == 'D') ? HEAD : null;
+            case 'T' -> (len == 5 && buf[off + 1] == 'R' && buf[off + 2] == 'A' && buf[off + 3] == 'C' && buf[off + 4] == 'E') ? TRACE : null;
+            case 'C' -> (len == 7 && buf[off + 1] == 'O' && buf[off + 2] == 'N' && buf[off + 3] == 'N' && buf[off + 4] == 'E' && buf[off + 5] == 'C' && buf[off + 6] == 'T') ? CONNECT : null;
+            default -> null;
+        };
+    }
+
+    //Only to be used for debugging/logging purposes, never in the hot path.
+    @Override
+    public String toString() {
+        return new String(bytes, StandardCharsets.UTF_8);
+    }
+}