Hi,

in your template if you have added the input field inside a form, then below the form add a submit button. Upon clicking the submit button , the route mentioned in the action along with the form will be called ,

<form action="/test/path" method="post" data-success_page="/thanks" class="s_website_form form-horizontal container-fluid mt32" >    
       # add the input fields here
       <div class="form-group form-field o_website_form_required_custom">    
           <label class="col-md-3 col-sm-4 control-label" for="name">Name</label>   
             <div class="col-md-7 col-sm-8">       
                 <input type="text" class="form-control o_website_form_input" name="name" required=""/>   
             </div>
        </div>   
       <div class="form-group"> 
            <div class="col-md-offset-3 col-sm-offset-4 col-sm-8 col-md-7"> 
                <span id='submit' class="btn btn-primary btn-lg o_website_form_send">Submit</span> 
                <span id="o_website_form_result"></span> 
            </div> 
       </div>
</form>

Then in the controller,

@http.route('/test/path', type='http', methods=['POST'], auth="public", website=True, csrf=False)
def test_path(self, **kw):
    #here in kw you can get the inputted value
    print kw['name']

Thanks