我在做一个通过Chrome扩展的刮板。它获取页面上的所有HTML,并将其发送到一个python代码,该代码过滤并保存数据。我这样做的原因是因为这个网站有蒸馏网络和一个“传统”的刮板被封锁
我成功地连接了这两个代码,但是每当我尝试向python服务器发送“Test”时,它只输出浏览器的头
b'GET / HTTP/1.1 Host: localhost:18364 Connection: Upgrade Pragma: no-cache Cache-Control: no-cache User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36 Upgrade: websocket Origin: chrome-extension://ocplnbpkkcpcomkjioockgnlohhkdeic Sec-WebSocket-Version: 13 Accept-Encoding: gzip, deflate, br Accept-Language: nl-NL,nl;q=0.9,en-US;q=0.8,en;q=0.7 Sec-WebSocket-Key: SDC7zPgHK/eV+QRSJy0DZQ== Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits'
JavaScript代码(客户端):
chrome.runtime.onMessage.addListener(function(request, sender) {
if (request.action == "getSource") {
var pageAmount = parseInt(request.source, 10)
var allHTML = ""
var BaseURL = "https://www.funda.nl/huur/rotterdam/p"
function encode_utf8(s) {
return unescape(encodeURIComponent(s));
}
var websocket = new WebSocket('ws://localhost:18364');
websocket.onopen = function () {
data = encode_utf8('Test.')
websocket.send('Test.');
};
message.innerText = request.source;
}
});
function onWindowLoad() {
var message = document.querySelector('#message');
chrome.tabs.executeScript(null, {
file: "getPageContent.js"
}, function() {
// If you try and inject into an extensions page or the webstore/NTP you'll get an error
if (chrome.runtime.lastError) {
message.innerText = 'There was an error injecting script : \n' + chrome.runtime.lastError.message;
}
});
}
window.onload = onWindowLoad;
Python代码(服务器):
import socket
LocalSocket = socket.socket()
allHTML = ''
try: # Connecting the Socket
LocalSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
LocalSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
LocalSocket.bind(('localhost', 18364))
print("Connected.")
except socket.error as err:
print("ConnectionError: %s" % err)
def main():
LocalSocket.listen(1)
c, addr = LocalSocket.accept()
print('Got connection from', addr)
print(c.recv(1024))
c.close()
if __name__ == "__main__":
main()
web套接字是在HTTP上分层的,因此这是预期的行为。您需要一个web服务器(或者说HTTP的东西)来处理
Connection: Upgrade
和Upgrade: websocket
部分,然后在获得支持双向通信的有效连接之前执行其余的握手您可以考虑使用^{} 包,它很好地包装了这一点
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