Add headless support for echo360 cloud

.gitignore

@@ -58,3 +58,6 @@ target/
 # appp specific folders
 bin/
 default_out_path/
+
+#
+.vscode/

README.md

@@ -169,6 +169,18 @@ Note: sometime it works better than phantomjs in some system
     --chrome
 ```
 
+### Use headless mode in echo360.org
+
+Simply by supplying a username and password, your chromedriver session will be headless. 
+This means there will be no log in window and you can run this on a server for example.
+
+```shell
+>>> ./run.sh                  \
+    https://echo360.org.uk/section/534de63e-ecab-1a93-1ea8-e8225825dce/home \
+    -u [email protected]
+    -p password
+```
+
 # FAQ
 
 ### Is my university supported?

echo360/downloader.py

@@ -72,7 +72,7 @@ def __init__(self,
         if webdriver_to_use == 'chrome':
             from selenium.webdriver.chrome.options import Options
             opts = Options()
-            if not setup_credential:
+            if self._username!=None and self._password!=None:
                 opts.add_argument("--headless")
             opts.add_argument("--window-size=1920x1080")
             opts.add_argument("user-agent={}".format(self._useragent))

echo360/main.py

@@ -254,7 +254,7 @@ def cmd_exists(x):
         binary_type, 'LOCAL'
         if use_local_binary else 'GLOBAL'))
     if setup_credential:
-        run_setup_credential(downloader._driver, course_hostname, echo360_cloud=True)
+        run_setup_credential(downloader._driver, course_hostname, username, password, echo360_cloud=True)
         downloader._driver.set_window_size(0, 0)
     downloader.download_all()
 
@@ -268,7 +268,7 @@ def start_download_binary(binary_downloader, binary_type, manual=False):
     print('Done!')
     print('=' * 65)
 
-def run_setup_credential(webdriver, url, echo360_cloud=False):
+def run_setup_credential(webdriver, url, username, password, echo360_cloud=False):
     webdriver.get(url)
     try:
         # for making it compatiable with Python 2 & 3
@@ -277,9 +277,16 @@ def run_setup_credential(webdriver, url, echo360_cloud=False):
         pass
     try:
         if echo360_cloud:
-            print(" >> After you finished logging into echo360 cloud, the window "
-                  "should be automatically redirected and continued. If it got stuck, "
-                  "please contact the author :)")
+            if username==None and password==None:
+                print(" >> After you finished logging into echo360 cloud, the window "
+                    "should be automatically redirected and continued. If it got stuck, "
+                    "please contact the author :)")
+            else:
+                webdriver.find_element_by_xpath('//*[@id="email"]').send_keys(username)
+                webdriver.find_element_by_xpath('//*[@id="submitBtn"]').click()
+
+                webdriver.find_element_by_xpath('//*[@id="password"]').send_keys(password)
+                webdriver.find_element_by_xpath('//*[@id="submitBtn"]').click()
         while True:
             if echo360_cloud:
                 # automatically wait for the Auth Token from webdriver