Inject a combination of HTML and JavaScript code into the Selenium Webdriver

Question

Inject a combination of HTML and JavaScript code into the Selenium Webdriver

I am facing a challenge where I have an HTML document stored in memory as a string, and it includes a <script> tag with a script that manipulates the DOM. My goal is to load this HTML page into Selenium WebDriver and retrieve the modified version after the script has taken effect. However, I am reluctant to write the HTML to a file and then load it using

driver.get("file://path/to/file")

. So, my question is whether there is another way to achieve this without writing to a file.

If WebDriver cannot handle this task, are there any alternative solutions available?

Let's consider the following example:

<html><head>
<script type="text/javascript">
function fill(){
    var i = "secret"
    document.forms[0].elements[1].value=i
}
</script>
</head><body onload="fill()">
<form method="POST"><input type="hidden" name="he1" value="">
<input type="hidden" name="he2" value="">
</form></body></html>

The desired outcome is for the WebDriver to execute the script and update the form accordingly.

Note: The provided example is simplified; the actual script I need to run is much more complex.

java javascript selenium-webdriver

Answer 1

Answer №1

If you prefer not to go through the hassle of creating a file or loading a URL in order to update the content of your page, you can utilize the Data URLs feature. This feature supports HTML, CSS, and JavaScript, allowing you to easily manipulate your page's content:

ChromeDriver driver = new ChromeDriver();
html_content = """
<html>
     <head></head>
     <body>
         <div>
             Hello World =)
         </div>
     </body>
</html>
"""

driver.get("data:text/html;charset=utf-8," + html_content)

Answer 2

If you prefer not to go through the hassle of creating a file or loading a URL in order to update the content of your page, you can utilize the Data URLs feature. This feature supports HTML, CSS, and JavaScript, allowing you to easily manipulate your page's content:

ChromeDriver driver = new ChromeDriver();
html_content = """
<html>
     <head></head>
     <body>
         <div>
             Hello World =)
         </div>
     </body>
</html>
"""

driver.get("data:text/html;charset=utf-8," + html_content)

Answer 3

Answer №2

this script allows for the loading of HTML content containing JavaScript and CSS.

encoded_html = base64.b64encode(html_content.encode('utf-8')).decode()
driver.get("data:text/html;base64," + encoded_html)

Answer 4

this script allows for the loading of HTML content containing JavaScript and CSS.

encoded_html = base64.b64encode(html_content.encode('utf-8')).decode()
driver.get("data:text/html;base64," + encoded_html)

Answer 5

Answer №3

To start fresh, you could create an empty webpage like this:

<html></html>

Next, inject content into the page:

ChromeDriver driver = new ChromeDriver();
driver.get("file://empty-page.html");
String innerHtml = "<head>...</head><body onload="...">...</body>";
driver.executeScript("document.innerHTML = " + innerHtml);

Trigger the load event on the body:

driver.executeScript("$(document.body).trigger('load');");

Retrieve the updated HTML:

String result = driver.executeScript("document.body.innerHTML;");

Answer 6

To start fresh, you could create an empty webpage like this:

<html></html>

Next, inject content into the page:

ChromeDriver driver = new ChromeDriver();
driver.get("file://empty-page.html");
String innerHtml = "<head>...</head><body onload="...">...</body>";
driver.executeScript("document.innerHTML = " + innerHtml);

Trigger the load event on the body:

driver.executeScript("$(document.body).trigger('load');");

Retrieve the updated HTML:

String result = driver.executeScript("document.body.innerHTML;");

Answer 7

Answer №4

When working with Java Selenium 2.4.2, I have a method that replaces the inner html of an existing element. To ensure proper HTML escaping for JavaScript, I utilize Apache's StringEscapeUtils.escapeJavaScript.

    public void replaceHTML(By by, String html) {
      WebElement e = driver.findElement(by);
      ((JavascriptExecutor) driver).executeScript("arguments[0].innerHTML='" + StringEscapeUtils.escapeJavaScript(html) + "'", e);
    }

Here is an example of the HTML string I passed in:

<button type="button" onclick="alert('Hello world!')">Click Me!</button>

Some additional notes:

I encountered issues with "Lance Java's" approach due to invalid escaped characters. Adding a single quote after the equal sign resolved this problem.
I also tested "Kenneth Baltrinic's" suggestion of using driver.get('about:blank'); but found that writing to the screen while interacting with the base document was challenging. In Java, I had to use double quotes like driver.get("about:blank"). This testing was done using Chrome.

Answer 8

When working with Java Selenium 2.4.2, I have a method that replaces the inner html of an existing element. To ensure proper HTML escaping for JavaScript, I utilize Apache's StringEscapeUtils.escapeJavaScript.

    public void replaceHTML(By by, String html) {
      WebElement e = driver.findElement(by);
      ((JavascriptExecutor) driver).executeScript("arguments[0].innerHTML='" + StringEscapeUtils.escapeJavaScript(html) + "'", e);
    }

Here is an example of the HTML string I passed in:

<button type="button" onclick="alert('Hello world!')">Click Me!</button>

Some additional notes:

I encountered issues with "Lance Java's" approach due to invalid escaped characters. Adding a single quote after the equal sign resolved this problem.
I also tested "Kenneth Baltrinic's" suggestion of using driver.get('about:blank'); but found that writing to the screen while interacting with the base document was challenging. In Java, I had to use double quotes like driver.get("about:blank"). This testing was done using Chrome.

Answer 9

Answer №5

Just a quick update: escapeEcmaScrip() now replaces escapeJavaScript() as of 2015.

public static void main(String[] args) throws InterruptedException{ 
    driver = new FirefoxDriver();
    driver.get("http://dhtmlx.com/docs/products/dhtmlxTree/");
    replaceHTML(By.xpath("//*/span[text()='Supported browsers:']"), "<button type=\"button\"  onclick=\"alert('Hello World!!')\">Click Me!</button>");
}

 private static void replaceHTML(By by, String html) {
      WebElement e = driver.findElement(by);
     ((JavascriptExecutor) driver).executeScript("arguments[0].innerHTML='" + StringEscapeUtils.escapeEcmaScript(html) + "'", e);

}

Answer 10

Just a quick update: escapeEcmaScrip() now replaces escapeJavaScript() as of 2015.

public static void main(String[] args) throws InterruptedException{ 
    driver = new FirefoxDriver();
    driver.get("http://dhtmlx.com/docs/products/dhtmlxTree/");
    replaceHTML(By.xpath("//*/span[text()='Supported browsers:']"), "<button type=\"button\"  onclick=\"alert('Hello World!!')\">Click Me!</button>");
}

 private static void replaceHTML(By by, String html) {
      WebElement e = driver.findElement(by);
     ((JavascriptExecutor) driver).executeScript("arguments[0].innerHTML='" + StringEscapeUtils.escapeEcmaScript(html) + "'", e);

}

Answer 11

Answer №6

One possible solution is to utilize jetty embedded. By configuring a jetty instance, you can have it serve html strings stored in memory as web pages through a Servlet or Handler.

Answer 12

One possible solution is to utilize jetty embedded. By configuring a jetty instance, you can have it serve html strings stored in memory as web pages through a Servlet or Handler.

Inject a combination of HTML and JavaScript code into the Selenium Webdriver

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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