@Override
public Header authenticate(Credentials credentials, HttpRequest request, HttpContext context)
        throws AuthenticationException {
    Args.notNull(credentials, "Credentials");
    Args.notNull(request, "HTTP request");

    // the bearer token is stored in the password field, not credentials.getUserPrincipal().getName()
    String bearerToken = credentials.getPassword();

    CharArrayBuffer buffer = new CharArrayBuffer(64);
    if (isProxy()) {
        buffer.append("Proxy-Authorization");
    } else {
        buffer.append("Authorization");
    }
    buffer.append(": Bearer ");
    buffer.append(bearerToken);

    return new BufferedHeader(buffer);
}
 

public List<Header> buildHeaders() {
    ArrayList<Header> headersArr = new ArrayList<>();
    if (!StringUtils.isEmpty(headers)) {
        BufferedReader in = new BufferedReader(new StringReader(headers));

        String str;
        try {
            while ((str = in.readLine()) != null) {
                CharArrayBuffer charArrayBuffer = new CharArrayBuffer(str.length());
                charArrayBuffer.append(str);
                headersArr.add(new BufferedHeader(charArrayBuffer));
            }
        } catch (IOException e) {
            throw new IllegalArgumentException(e);
        }
    }

    if (entityContentType != null) {
        headersArr.add(entityContentType);
    } else if (contentType != null && !contentType.toString().isEmpty()) {
        headersArr.add(new BasicHeader("Content-Type", contentType.toString()));
    }
    return headersArr;
}
 

@Test
public void build() {
    ContentType contentType = ContentType.parse(CONTENT_TYPE);
    List<Header> headers = new HeadersBuilder()
            .setHeaders("header1:value1\nheader2:value2")
            .setContentType(contentType)
            .buildHeaders();
    assertEquals(3, headers.size());
    assertThat(headers.get(0), instanceOf(BufferedHeader.class));
    BufferedHeader basicHeader = (BufferedHeader) headers.get(1);
    assertEquals("header2", basicHeader.getName());
    assertEquals("value2", basicHeader.getValue());
    BasicHeader contentTypeHeader = (BasicHeader) headers.get(2);
    assertEquals("Content-Type", contentTypeHeader.getName());
    assertEquals(CONTENT_TYPE, contentTypeHeader.getValue());
}
 

@Override
public List<Header> formatCookies(final List<Cookie> cookies) {
    Collections.sort(cookies, COOKIE_COMPARATOR);

    final CharArrayBuffer buffer = new CharArrayBuffer(20 * cookies.size());
    buffer.append(SM.COOKIE);
    buffer.append(": ");
    for (int i = 0; i < cookies.size(); i++) {
        final Cookie cookie = cookies.get(i);
        if (i > 0) {
            buffer.append("; ");
        }
        final String cookieName = cookie.getName();
        final String cookieValue = cookie.getValue();
        if (cookie.getVersion() > 0 && !isQuoteEnclosed(cookieValue)) {
            HtmlUnitBrowserCompatCookieHeaderValueFormatter.INSTANCE.formatHeaderElement(
                    buffer,
                    new BasicHeaderElement(cookieName, cookieValue),
                    false);
        }
        else {
            // Netscape style cookies do not support quoted values
            buffer.append(cookieName);
            buffer.append("=");
            if (cookieValue != null) {
                buffer.append(cookieValue);
            }
        }
    }
    final List<Header> headers = new ArrayList<>(1);
    headers.add(new BufferedHeader(buffer));
    return headers;
}