// Test characters just outside ranges that are not valid
        assertFalse(CharUtil.isUrlChar('`')); // backtick (just before 'a')
        assertFalse(CharUtil.isUrlChar('{')); // left brace (just after 'z')
        assertFalse(CharUtil.isUrlChar('^')); // caret (before 'a' range)
        assertFalse(CharUtil.isUrlChar('|')); // pipe (not in valid set)
    }

mvn test                       # Run tests
mvn formatter:format           # Format code
mvn license:format             # Update license headers
```

### Code Style

- 4 spaces (no tabs)
- Opening brace on same line
- Max line length: 120
- JavaDoc required for public APIs
- License headers required

### Testing

**Structure**: `src/test/java/org/codelibs/fess/crawler/`

        // ## Note: There's no Curl.trace() factory method, but we can use the constructor ##

        // ## Act ##
        final CurlRequest request = new CurlRequest(Method.TRACE, "http://example.com");

        // ## Assert ##
        assertNotNull(request);
        assertEquals(Method.TRACE, request.method());
    }

    @Test
    public void test_MethodEnumValueOf() {

    }

    /**
     * Creates a new CurlRequest with the HTTP TRACE method for the specified URL.
     *
     * @param url the URL to send the TRACE request to
     * @return a new CurlRequest object configured with the TRACE method and the specified URL
     */
    public static CurlRequest trace(final String url) {
        return new CurlRequest(Method.TRACE, url);
    }

    /**

=====

A simple cURL-like Java HTTP client.

## Features

- Fluent API for building HTTP requests (GET, POST, PUT, DELETE, HEAD, OPTIONS, CONNECT, TRACE)
- Support for query parameters, headers, body (String or stream), compression, SSL configuration, proxies, and timeouts
- Automatic in-memory or on-disk caching of request/response bodies

        return actionClass;
    }

    /**
     * Overrides fillInStackTrace to return null for performance optimization.
     * This prevents stack trace generation for this exception type.
     *
     * @return null to skip stack trace generation
     */
    @Override
    public synchronized Throwable fillInStackTrace() {
        return null;
    }

            writer.accept("Thread: " + entry.getKey());
            final StackTraceElement[] trace = entry.getValue();
            for (final StackTraceElement element : trace) {
                writer.accept("\tat " + element);
            }
        }
    }

mvn deploy
```

## Architecture

### Core Components

- **`org.codelibs.curl.Curl`**: Static entry point providing factory methods for all HTTP methods (GET, POST, PUT, DELETE, HEAD, OPTIONS, CONNECT, TRACE)
- **`org.codelibs.curl.CurlRequest`**: Fluent request builder supporting parameters, headers, body content, SSL config, proxies, timeouts, and caching

REM Application Configuration
set APP_NAME=fess
set SEARCH_ENGINE_HOME=%FESS_HOME%/es

if NOT "%FESS_USE_GC_LOGGING%" == "" set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Xlog:gc*,gc+age=trace,safepoint:file=%FESS_HOME%/logs/gc-%APP_NAME%.log:utctime,pid,tags:filecount=5,filesize=64m

set FESS_CLASSPATH=%FESS_HOME%\lib\classes
set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Dfess

if [ "x$FESS_PORT" = "x" ]; then
  FESS_PORT=8080
fi
if [ "x$FESS_CONTEXT_PATH" = "x" ]; then
  FESS_CONTEXT_PATH=/
fi
if [ "x$FESS_USE_GC_LOGGING" != "x" ]; then
  FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Xlog:gc*,gc+age=trace,safepoint:file=$FESS_LOG_PATH/gc-$APP_NAME.log:utctime,pid,tags:filecount=5,filesize=64m"
fi
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dfess.home=$FESS_HOME"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dfess.context.path=$FESS_CONTEXT_PATH"