How to download an image using Selenium (any version)?

Question

I was wondering, how can one use selenium/webdriver to download an image for a page. Assuming that the user session is required to download the image hence having pure URL i

Answer 1

Another mostly correct solution is to download it directly by simple HTTP request.
You could use webDriver's user session, cause it stores cookies.
In my example, I'm just analyzing what status code it returns. If 200, then image exists and it is available for show or download. If you need to really download file itself - you could just get all image data from httpResponse entity (use it as simple input stream).

// just look at your cookie's content (e.g. using browser)
// and import these settings from it
private static final String SESSION_COOKIE_NAME = "JSESSIONID";
private static final String DOMAIN = "domain.here.com";
private static final String COOKIE_PATH = "/cookie/path/here";

protected boolean isResourceAvailableByUrl(String resourceUrl) {
    HttpClient httpClient = new DefaultHttpClient();
    HttpContext localContext = new BasicHttpContext();
    BasicCookieStore cookieStore = new BasicCookieStore();
    // apply jsessionid cookie if it exists
    cookieStore.addCookie(getSessionCookie());
    localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);
    // resourceUrl - is url which leads to image
    HttpGet httpGet = new HttpGet(resourceUrl);

    try {
        HttpResponse httpResponse = httpClient.execute(httpGet, localContext);
        return httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK;
    } catch (IOException e) {
        return false;
    }
}

protected BasicClientCookie getSessionCookie() {
    Cookie originalCookie = webDriver.manage().getCookieNamed(SESSION_COOKIE_NAME);

    if (originalCookie == null) {
        return null;
    }

    // just build new apache-like cookie based on webDriver's one
    String cookieName = originalCookie.getName();
    String cookieValue = originalCookie.getValue();
    BasicClientCookie resultCookie = new BasicClientCookie(cookieName, cookieValue);
    resultCookie.setDomain(DOMAIN);
    resultCookie.setExpiryDate(originalCookie.getExpiry());
    resultCookie.setPath(COOKIE_PATH);
    return resultCookie;
}