The method to get the rendered HTML I prefer is following:

driver.get("http://www.google.com")
body_html = driver.find_element_by_xpath("/html/body")
print body_html.text

However the above method removes all the tags( yes the nested tags as well ) and returns only text content. If you interested in getting the HTML markup as well, then use the method below.

print body_html.getAttribute("innerHTML")

You can read innerHTML attribute to get source of the content of the element or outerHTML for source with the current element.

Python:

element.get_attribute('innerHTML')

Java:

elem.getAttribute("innerHTML");

C#:

element.GetAttribute("innerHTML");

Ruby:

element.attribute("innerHTML")

JS:

element.getAttribute('innerHTML');

PHP:

$elem.getAttribute('innerHTML');

Tested and works with the ChromeDriver.

InnerHTML will return element inside the selected element and outerHTML will return inside HTML along with the element you have selected

Example :- Now suppose your Element is as below

<tr id="myRow"><td>A</td><td>B</td></tr>

innerHTML element Output

<td>A</td><td>B</td>

outerHTML element Output

<tr id="myRow"><td>A</td><td>B</td></tr>

Live Example :-

http://www.java2s.com/Tutorials/JavascriptDemo/f/find_out_the_difference_between_innerhtml_and_outerhtml_in_javascript_example.htm

Below you will find the syntax which require as per different binding. Change the innerHTML to outerHTML as per required.

Python:

element.get_attribute('innerHTML')

Java:

elem.getAttribute("innerHTML");

If you want whole page HTML use below code :-

driver.getPageSource();

I hope this could help: http://selenium.googlecode.com/svn/trunk/docs/api/java/org/openqa/selenium/WebElement.html

Here is described Java method:

java.lang.String    getText() 

But unfortunately it's not available in Python. So you can translate the method names to Python from Java and try another logic using present methods without getting the whole page source...

E.g.

 my_id = elem[0].get_attribute('my-id')

If you are interested in a solution for Remote Control in Python, here is how to get innerHTML:

innerHTML = sel.get_eval("window.document.getElementById('prodid').innerHTML")

Java with Selenium 2.53.0

driver.getPageSource();

In Ruby, using selenium-webdriver (2.32.1), there is a page_source method that contains the entire page source.

There is not really a straight-forward way of getting the html source code of a webelement. You will have to use JS. I am not too sure about python bindings but you can easily do like this in Java. I am sure there must be something similar to JavascriptExecutor class in Python.

 WebElement element = driver.findElement(By.id("foo"));
 String contents = (String)((JavascriptExecutor)driver).executeScript("return arguments[0].innerHTML;", element); 

And in PHPUnit selenium test it's like this:

$text = $this->byCssSelector('.some-class-nmae')->attribute('innerHTML');

Looks outdated, but let it be here anyway. The correct way to do it in your case:

elem = wd.find_element_by_css_selector('#my-id')
html = wd.execute_script("return arguments[0].innerHTML;", elem)

or

html = elem.get_attribute('innerHTML')

Both are working for me (selenium-server-standalone-2.35.0)

Sure we can get all HTML source code with this script below in Selenium Python:

elem = driver.find_element_by_xpath("//*")
source_code = elem.get_attribute("outerHTML")

If you you want to save it to file:

f = open('c:/html_source_code.html', 'w')
f.write(source_code.encode('utf-8'))
f.close()

I suggest saving to a file because source code is very very long.

Using the attribute method is, in fact, easier and more straight forward.

Using Ruby with the Selenium and PageObject gems, to get the class associated with a certain element, the line would be element.attribute(Class).

The same concept applies if you wanted to get other attributes tied to the element. For example, if I wanted the String of an element, element.attribute(String).

WebElement element = driver.findElement(By.id("foo"));
String contents = (String)((JavascriptExecutor)driver).executeScript("return      arguments[0].innerHTML;", element); 

This code really works to get JavaScript from source as well!