def InvokeBrowser(path):
"""Invoke the Chrome browser.
Args:
path: full path to browser
Returns:
A tuple of (main window, process handle, address bar, render pane)
"""
# Reuse an existing instance of the browser if we can find one. This
# may not work correctly, especially if the window is behind other windows.
# TODO(jhaas): make this work with Vista
wnds = windowing.FindChildWindows(0, "Chrome_XPFrame")
if len(wnds):
wnd = wnds[0]
proc = None
else:
# Invoke Chrome
(proc, wnd) = windowing.InvokeAndWait(path)
# Get windows we'll need
address_bar = windowing.FindChildWindow(wnd, "Chrome_AutocompleteEdit")
render_pane = GetChromeRenderPane(wnd)
return (wnd, proc, address_bar, render_pane)
def InvokeBrowser(path):
"""Invoke the Firefox browser.
Args:
path: full path to browser
Returns:
A tuple of (main window, process handle, render pane)
"""
# Reuse an existing instance of the browser if we can find one. This
# may not work correctly, especially if the window is behind other windows.
wnds = windowing.FindChildWindows(0, "MozillaUIWindowClass")
if len(wnds):
wnd = wnds[0]
proc = None
else:
# Invoke Firefox
(proc, wnd) = windowing.InvokeAndWait(path)
# Get the content pane
render_pane = windowing.FindChildWindow(
wnd,
"MozillaWindowClass/MozillaWindowClass/MozillaWindowClass")
return (wnd, proc, render_pane)
def Scrape(urls, outdir, size, pos, timeout=20, **kwargs):
"""Invoke a browser, send it to a series of URLs, and save its output.
Args:
urls: list of URLs to scrape
outdir: directory to place output
size: size of browser window to use
pos: position of browser window
timeout: amount of time to wait for page to load
kwargs: miscellaneous keyword args
Returns:
None if success, else an error string
"""
if "path" in kwargs and kwargs["path"]: path = kwargs["path"]
else: path = DEFAULT_PATH
(wnd, proc, render_pane) = InvokeBrowser(path)
# Resize and reposition the frame
windowing.MoveAndSizeWindow(wnd, pos, size, render_pane)
time.sleep(3)
# Firefox is a bit of a pain: it doesn't use standard edit controls,
# and it doesn't display a throbber when there's no tab. Let's make
# sure there's at least one tab, then select the first one
mouse.ClickInWindow(wnd)
keyboard.TypeString("[t]", True)
mouse.ClickInWindow(wnd, (30, 115))
time.sleep(2)
timedout = False
# Visit each URL we're given
if type(urls) in types.StringTypes: urls = [urls]
for url in urls:
# Use keyboard shortcuts
keyboard.TypeString("{d}", True)
keyboard.TypeString(url)
keyboard.TypeString("\n")
# Wait for the page to finish loading
load_time = windowing.WaitForThrobber(wnd, (10, 96, 26, 112), timeout)
timedout = load_time < 0
if timedout:
break
# Scrape the page
image = windowing.ScrapeWindow(render_pane)
# Save to disk
if "filename" in kwargs:
if callable(kwargs["filename"]):
filename = kwargs["filename"](url)
else:
filename = kwargs["filename"]
else:
filename = windowing.URLtoFilename(url, outdir, ".bmp")
image.save(filename)
# Close all the tabs, cheesily
mouse.ClickInWindow(wnd)
while len(windowing.FindChildWindows(0, "MozillaUIWindowClass")):
keyboard.TypeString("[w]", True)
time.sleep(1)
if timedout:
return "timeout"
def Time(urls, size, timeout, **kwargs):
"""Measure how long it takes to load each of a series of URLs
Args:
urls: list of URLs to time
size: size of browser window to use
timeout: amount of time to wait for page to load
kwargs: miscellaneous keyword args
Returns:
A list of tuples (url, time). "time" can be "crashed" or "timeout"
"""
if "path" in kwargs and kwargs["path"]: path = kwargs["path"]
else: path = DEFAULT_PATH
proc = None
# Visit each URL we're given
if type(urls) in types.StringTypes: urls = [urls]
ret = []
for url in urls:
try:
# Invoke the browser if necessary
if not proc:
(wnd, proc, render_pane) = InvokeBrowser(path)
# Resize and reposition the frame
windowing.MoveAndSizeWindow(wnd, (0, 0), size, render_pane)
time.sleep(3)
# Firefox is a bit of a pain: it doesn't use standard edit controls,
# and it doesn't display a throbber when there's no tab. Let's make
# sure there's at least one tab, then select the first one
mouse.ClickInWindow(wnd)
keyboard.TypeString("[t]", True)
mouse.ClickInWindow(wnd, (30, 115))
time.sleep(2)
# Use keyboard shortcuts
keyboard.TypeString("{d}", True)
keyboard.TypeString(url)
keyboard.TypeString("\n")
# Wait for the page to finish loading
load_time = windowing.WaitForThrobber(wnd, (10, 96, 26, 112),
timeout)
timedout = load_time < 0
if timedout:
load_time = "timeout"
# Try to close the browser; if this fails it's probably a crash
mouse.ClickInWindow(wnd)
count = 0
while (len(
windowing.FindChildWindows(0, "MozillaUIWindowClass"))
and count < 5):
keyboard.TypeString("[w]", True)
time.sleep(1)
count = count + 1
if len(windowing.FindChildWindows(0, "MozillaUIWindowClass")):
windowing.EndProcess(proc)
load_time = "crashed"
proc = None
except pywintypes.error:
proc = None
load_time = "crashed"
ret.append((url, load_time))
if proc:
count = 0
while (len(windowing.FindChildWindows(0, "MozillaUIWindowClass"))
and count < 5):
keyboard.TypeString("[w]", True)
time.sleep(1)
count = count + 1
return ret