forked from Archives/langchain
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
428 lines
15 KiB
Python
428 lines
15 KiB
Python
# flake8: noqa
|
|
import time
|
|
from sys import platform
|
|
from typing import (
|
|
TYPE_CHECKING,
|
|
Any,
|
|
Dict,
|
|
Iterable,
|
|
List,
|
|
Optional,
|
|
Set,
|
|
Tuple,
|
|
TypedDict,
|
|
Union,
|
|
)
|
|
|
|
if TYPE_CHECKING:
|
|
from playwright.sync_api import Browser, CDPSession, Page, sync_playwright
|
|
|
|
black_listed_elements: Set[str] = {
|
|
"html",
|
|
"head",
|
|
"title",
|
|
"meta",
|
|
"iframe",
|
|
"body",
|
|
"script",
|
|
"style",
|
|
"path",
|
|
"svg",
|
|
"br",
|
|
"::marker",
|
|
}
|
|
|
|
|
|
class ElementInViewPort(TypedDict):
|
|
node_index: str
|
|
backend_node_id: int
|
|
node_name: Optional[str]
|
|
node_value: Optional[str]
|
|
node_meta: List[str]
|
|
is_clickable: bool
|
|
origin_x: int
|
|
origin_y: int
|
|
center_x: int
|
|
center_y: int
|
|
|
|
|
|
class Crawler:
|
|
def __init__(self) -> None:
|
|
try:
|
|
from playwright.sync_api import sync_playwright
|
|
except ImportError:
|
|
raise ValueError(
|
|
"Could not import playwright python package. "
|
|
"Please install it with `pip install playwright`."
|
|
)
|
|
self.browser: Browser = (
|
|
sync_playwright().start().chromium.launch(headless=False)
|
|
)
|
|
self.page: Page = self.browser.new_page()
|
|
self.page.set_viewport_size({"width": 1280, "height": 1080})
|
|
self.page_element_buffer: Dict[int, ElementInViewPort]
|
|
self.client: CDPSession
|
|
|
|
def go_to_page(self, url: str) -> None:
|
|
self.page.goto(url=url if "://" in url else "http://" + url)
|
|
self.client = self.page.context.new_cdp_session(self.page)
|
|
self.page_element_buffer = {}
|
|
|
|
def scroll(self, direction: str) -> None:
|
|
if direction == "up":
|
|
self.page.evaluate(
|
|
"(document.scrollingElement || document.body).scrollTop = (document.scrollingElement || document.body).scrollTop - window.innerHeight;"
|
|
)
|
|
elif direction == "down":
|
|
self.page.evaluate(
|
|
"(document.scrollingElement || document.body).scrollTop = (document.scrollingElement || document.body).scrollTop + window.innerHeight;"
|
|
)
|
|
|
|
def click(self, id: Union[str, int]) -> None:
|
|
# Inject javascript into the page which removes the target= attribute from all links
|
|
js = """
|
|
links = document.getElementsByTagName("a");
|
|
for (var i = 0; i < links.length; i++) {
|
|
links[i].removeAttribute("target");
|
|
}
|
|
"""
|
|
self.page.evaluate(js)
|
|
|
|
element = self.page_element_buffer.get(int(id))
|
|
if element:
|
|
x: float = element["center_x"]
|
|
y: float = element["center_y"]
|
|
|
|
self.page.mouse.click(x, y)
|
|
else:
|
|
print("Could not find element")
|
|
|
|
def type(self, id: Union[str, int], text: str) -> None:
|
|
self.click(id)
|
|
self.page.keyboard.type(text)
|
|
|
|
def enter(self) -> None:
|
|
self.page.keyboard.press("Enter")
|
|
|
|
def crawl(self) -> List[str]:
|
|
page = self.page
|
|
page_element_buffer = self.page_element_buffer
|
|
start = time.time()
|
|
|
|
page_state_as_text = []
|
|
|
|
device_pixel_ratio: float = page.evaluate("window.devicePixelRatio")
|
|
if platform == "darwin" and device_pixel_ratio == 1: # lies
|
|
device_pixel_ratio = 2
|
|
|
|
win_upper_bound: float = page.evaluate("window.pageYOffset")
|
|
win_left_bound: float = page.evaluate("window.pageXOffset")
|
|
win_width: float = page.evaluate("window.screen.width")
|
|
win_height: float = page.evaluate("window.screen.height")
|
|
win_right_bound: float = win_left_bound + win_width
|
|
win_lower_bound: float = win_upper_bound + win_height
|
|
|
|
# percentage_progress_start = (win_upper_bound / document_scroll_height) * 100
|
|
# percentage_progress_end = (
|
|
# (win_height + win_upper_bound) / document_scroll_height
|
|
# ) * 100
|
|
percentage_progress_start = 1
|
|
percentage_progress_end = 2
|
|
|
|
page_state_as_text.append(
|
|
{
|
|
"x": 0,
|
|
"y": 0,
|
|
"text": "[scrollbar {:0.2f}-{:0.2f}%]".format(
|
|
round(percentage_progress_start, 2), round(percentage_progress_end)
|
|
),
|
|
}
|
|
)
|
|
|
|
tree = self.client.send(
|
|
"DOMSnapshot.captureSnapshot",
|
|
{"computedStyles": [], "includeDOMRects": True, "includePaintOrder": True},
|
|
)
|
|
strings: Dict[int, str] = tree["strings"]
|
|
document: Dict[str, Any] = tree["documents"][0]
|
|
nodes: Dict[str, Any] = document["nodes"]
|
|
backend_node_id: Dict[int, int] = nodes["backendNodeId"]
|
|
attributes: Dict[int, Dict[int, Any]] = nodes["attributes"]
|
|
node_value: Dict[int, int] = nodes["nodeValue"]
|
|
parent: Dict[int, int] = nodes["parentIndex"]
|
|
node_names: Dict[int, int] = nodes["nodeName"]
|
|
is_clickable: Set[int] = set(nodes["isClickable"]["index"])
|
|
|
|
input_value: Dict[str, Any] = nodes["inputValue"]
|
|
input_value_index: List[int] = input_value["index"]
|
|
input_value_values: List[int] = input_value["value"]
|
|
|
|
layout: Dict[str, Any] = document["layout"]
|
|
layout_node_index: List[int] = layout["nodeIndex"]
|
|
bounds: Dict[int, List[float]] = layout["bounds"]
|
|
|
|
cursor: int = 0
|
|
|
|
child_nodes: Dict[str, List[Dict[str, Any]]] = {}
|
|
elements_in_view_port: List[ElementInViewPort] = []
|
|
|
|
anchor_ancestry: Dict[str, Tuple[bool, Optional[int]]] = {"-1": (False, None)}
|
|
button_ancestry: Dict[str, Tuple[bool, Optional[int]]] = {"-1": (False, None)}
|
|
|
|
def convert_name(
|
|
node_name: Optional[str], has_click_handler: Optional[bool]
|
|
) -> str:
|
|
if node_name == "a":
|
|
return "link"
|
|
if node_name == "input":
|
|
return "input"
|
|
if node_name == "img":
|
|
return "img"
|
|
if (
|
|
node_name == "button" or has_click_handler
|
|
): # found pages that needed this quirk
|
|
return "button"
|
|
else:
|
|
return "text"
|
|
|
|
def find_attributes(
|
|
attributes: Dict[int, Any], keys: List[str]
|
|
) -> Dict[str, str]:
|
|
values = {}
|
|
|
|
for [key_index, value_index] in zip(*(iter(attributes),) * 2):
|
|
if value_index < 0:
|
|
continue
|
|
key = strings[key_index]
|
|
value = strings[value_index]
|
|
|
|
if key in keys:
|
|
values[key] = value
|
|
keys.remove(key)
|
|
|
|
if not keys:
|
|
return values
|
|
|
|
return values
|
|
|
|
def add_to_hash_tree(
|
|
hash_tree: Dict[str, Tuple[bool, Optional[int]]],
|
|
tag: str,
|
|
node_id: int,
|
|
node_name: Optional[str],
|
|
parent_id: int,
|
|
) -> Tuple[bool, Optional[int]]:
|
|
parent_id_str = str(parent_id)
|
|
if not parent_id_str in hash_tree:
|
|
parent_name = strings[node_names[parent_id]].lower()
|
|
grand_parent_id = parent[parent_id]
|
|
|
|
add_to_hash_tree(
|
|
hash_tree, tag, parent_id, parent_name, grand_parent_id
|
|
)
|
|
|
|
is_parent_desc_anchor, anchor_id = hash_tree[parent_id_str]
|
|
|
|
# even if the anchor is nested in another anchor, we set the "root" for all descendants to be ::Self
|
|
if node_name == tag:
|
|
value: Tuple[bool, Optional[int]] = (True, node_id)
|
|
elif (
|
|
is_parent_desc_anchor
|
|
): # reuse the parent's anchor_id (which could be much higher in the tree)
|
|
value = (True, anchor_id)
|
|
else:
|
|
value = (
|
|
False,
|
|
None,
|
|
) # not a descendant of an anchor, most likely it will become text, an interactive element or discarded
|
|
|
|
hash_tree[str(node_id)] = value
|
|
|
|
return value
|
|
|
|
for index, node_name_index in enumerate(node_names):
|
|
node_parent = parent[index]
|
|
node_name: Optional[str] = strings[node_name_index].lower()
|
|
|
|
is_ancestor_of_anchor, anchor_id = add_to_hash_tree(
|
|
anchor_ancestry, "a", index, node_name, node_parent
|
|
)
|
|
|
|
is_ancestor_of_button, button_id = add_to_hash_tree(
|
|
button_ancestry, "button", index, node_name, node_parent
|
|
)
|
|
|
|
try:
|
|
cursor = layout_node_index.index(
|
|
index
|
|
) # todo replace this with proper cursoring, ignoring the fact this is O(n^2) for the moment
|
|
except:
|
|
continue
|
|
|
|
if node_name in black_listed_elements:
|
|
continue
|
|
|
|
[x, y, width, height] = bounds[cursor]
|
|
x /= device_pixel_ratio
|
|
y /= device_pixel_ratio
|
|
width /= device_pixel_ratio
|
|
height /= device_pixel_ratio
|
|
|
|
elem_left_bound = x
|
|
elem_top_bound = y
|
|
elem_right_bound = x + width
|
|
elem_lower_bound = y + height
|
|
|
|
partially_is_in_viewport = (
|
|
elem_left_bound < win_right_bound
|
|
and elem_right_bound >= win_left_bound
|
|
and elem_top_bound < win_lower_bound
|
|
and elem_lower_bound >= win_upper_bound
|
|
)
|
|
|
|
if not partially_is_in_viewport:
|
|
continue
|
|
|
|
meta_data: List[str] = []
|
|
|
|
# inefficient to grab the same set of keys for kinds of objects, but it's fine for now
|
|
element_attributes = find_attributes(
|
|
attributes[index], ["type", "placeholder", "aria-label", "title", "alt"]
|
|
)
|
|
|
|
ancestor_exception = is_ancestor_of_anchor or is_ancestor_of_button
|
|
ancestor_node_key = (
|
|
None
|
|
if not ancestor_exception
|
|
else str(anchor_id)
|
|
if is_ancestor_of_anchor
|
|
else str(button_id)
|
|
)
|
|
ancestor_node = (
|
|
None
|
|
if not ancestor_exception
|
|
else child_nodes.setdefault(str(ancestor_node_key), [])
|
|
)
|
|
|
|
if node_name == "#text" and ancestor_exception and ancestor_node:
|
|
text = strings[node_value[index]]
|
|
if text == "|" or text == "•":
|
|
continue
|
|
ancestor_node.append({"type": "type", "value": text})
|
|
else:
|
|
if (
|
|
node_name == "input" and element_attributes.get("type") == "submit"
|
|
) or node_name == "button":
|
|
node_name = "button"
|
|
element_attributes.pop(
|
|
"type", None
|
|
) # prevent [button ... (button)..]
|
|
|
|
for key in element_attributes:
|
|
if ancestor_exception and ancestor_node:
|
|
ancestor_node.append(
|
|
{
|
|
"type": "attribute",
|
|
"key": key,
|
|
"value": element_attributes[key],
|
|
}
|
|
)
|
|
else:
|
|
meta_data.append(element_attributes[key])
|
|
|
|
element_node_value = None
|
|
|
|
if node_value[index] >= 0:
|
|
element_node_value = strings[node_value[index]]
|
|
if (
|
|
element_node_value == "|"
|
|
): # commonly used as a separator, does not add much context - lets save ourselves some token space
|
|
continue
|
|
elif (
|
|
node_name == "input"
|
|
and index in input_value_index
|
|
and element_node_value is None
|
|
):
|
|
node_input_text_index = input_value_index.index(index)
|
|
text_index = input_value_values[node_input_text_index]
|
|
if node_input_text_index >= 0 and text_index >= 0:
|
|
element_node_value = strings[text_index]
|
|
|
|
# remove redudant elements
|
|
if ancestor_exception and (node_name != "a" and node_name != "button"):
|
|
continue
|
|
|
|
elements_in_view_port.append(
|
|
{
|
|
"node_index": str(index),
|
|
"backend_node_id": backend_node_id[index],
|
|
"node_name": node_name,
|
|
"node_value": element_node_value,
|
|
"node_meta": meta_data,
|
|
"is_clickable": index in is_clickable,
|
|
"origin_x": int(x),
|
|
"origin_y": int(y),
|
|
"center_x": int(x + (width / 2)),
|
|
"center_y": int(y + (height / 2)),
|
|
}
|
|
)
|
|
|
|
# lets filter further to remove anything that does not hold any text nor has click handlers + merge text from leaf#text nodes with the parent
|
|
elements_of_interest = []
|
|
id_counter = 0
|
|
|
|
for element in elements_in_view_port:
|
|
node_index = element.get("node_index")
|
|
node_name = element.get("node_name")
|
|
element_node_value = element.get("node_value")
|
|
node_is_clickable = element.get("is_clickable")
|
|
node_meta_data: Optional[List[str]] = element.get("node_meta")
|
|
|
|
inner_text = f"{element_node_value} " if element_node_value else ""
|
|
meta = ""
|
|
|
|
if node_index in child_nodes:
|
|
for child in child_nodes[node_index]:
|
|
entry_type = child.get("type")
|
|
entry_value = child.get("value")
|
|
|
|
if entry_type == "attribute" and node_meta_data:
|
|
entry_key = child.get("key")
|
|
node_meta_data.append(f'{entry_key}="{entry_value}"')
|
|
else:
|
|
inner_text += f"{entry_value} "
|
|
|
|
if node_meta_data:
|
|
meta_string = " ".join(node_meta_data)
|
|
meta = f" {meta_string}"
|
|
|
|
if inner_text != "":
|
|
inner_text = f"{inner_text.strip()}"
|
|
|
|
converted_node_name = convert_name(node_name, node_is_clickable)
|
|
|
|
# not very elegant, more like a placeholder
|
|
if (
|
|
(converted_node_name != "button" or meta == "")
|
|
and converted_node_name != "link"
|
|
and converted_node_name != "input"
|
|
and converted_node_name != "img"
|
|
and converted_node_name != "textarea"
|
|
) and inner_text.strip() == "":
|
|
continue
|
|
|
|
page_element_buffer[id_counter] = element
|
|
|
|
if inner_text != "":
|
|
elements_of_interest.append(
|
|
f"""<{converted_node_name} id={id_counter}{meta}>{inner_text}</{converted_node_name}>"""
|
|
)
|
|
else:
|
|
elements_of_interest.append(
|
|
f"""<{converted_node_name} id={id_counter}{meta}/>"""
|
|
)
|
|
id_counter += 1
|
|
|
|
print("Parsing time: {:0.2f} seconds".format(time.time() - start))
|
|
return elements_of_interest
|