*
 * <p>Usage examples:</p>
 * <pre>
 *     throw new CurlException("Error message");
 *     throw new CurlException("Error message", cause);
 * </pre>
 *
 * @see RuntimeException
 */
public class CurlException extends RuntimeException {

    private static final long serialVersionUID = 1L;

    /**
     * Constructs a new CurlException with the specified detail message and cause.
     *

        request.param("key", "value");

        try {
            request.encoding("ISO-8859-1");
            fail("Expected CurlException");
        } catch (CurlException e) {
            assertTrue(e.getMessage().contains("must be called before param method"));
        }
    }

    @Test
    public void testThresholdMethod() {

     *
     * @param encoding the encoding
     * @return this CurlRequest instance
     * @throws CurlException if the method is called after the param method
     */
    public CurlRequest encoding(final String encoding) {
        if (paramList != null) {
            throw new CurlException("This method must be called before param method.");
        }
        this.encoding = encoding;
        return this;

        CurlException exception = new CurlException(message);
        String toString = exception.toString();

        assertNotNull(toString);
        assertTrue(toString.contains("CurlException"));
        assertTrue(toString.contains(message));
    }

    @Test
    public void testStackTrace() {
        CurlException exception = new CurlException("Test message");

            fail("Expected CurlException");
        } catch (CurlException e) {
            assertTrue(e.getMessage().contains("Failed to access the content"));
            // The cause should be another CurlException from getContentAsStream()
            assertTrue(e.getCause() instanceof CurlException);
            CurlException innerException = (CurlException) e.getCause();

        } catch (final Exception e) {
            throw new CurlException("Failed to access the content.", e);
        }
    }

    /**
     * Gets the content of the response as an InputStream.
     *
     * @return the content as an InputStream.
     * @throws IOException if an I/O error occurs.
     * @throws CurlException if the content does not exist.
     */

- `org.codelibs.curl.CurlRequest`: builder for HTTP requests.
- `org.codelibs.curl.CurlResponse`: wrapper for HTTP responses.
- `org.codelibs.curl.CurlException`: unchecked exception for errors.
- `org.codelibs.curl.io.ContentCache` and `ContentOutputStream`: internal utilities for streaming and caching.

Refer to the Javadoc for full API details.

## Building and Testing