From e525a6e512de17f4e9848d4a8eef6f4a0687b289 Mon Sep 17 00:00:00 2001
From: nfa <nfa@yeah.net>
Date: Thu, 23 Dec 2021 08:46:17 +0800
Subject: [PATCH] v1

---
 httpcap.py | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 httpcap.py

diff --git a/httpcap.py b/httpcap.py
new file mode 100644
index 0000000..63e9918
--- /dev/null
+++ b/httpcap.py
@@ -0,0 +1,126 @@
+#encoding=utf-8
+from scapy.sendrecv import sniff
+from scapy.all import scapy,TCPSession
+from scapy.layers.http import HTTPRequest, HTTPResponse, HTTP
+from datetime import datetime
+import re
+import configparser
+import os
+
+class hcap:
+    packageBody = ''
+    packageType = ''
+    def __init__(self,host,port,iface):
+        self.host = host
+        self.port = port
+        self.iface = iface
+
+    def hcap(self):
+        hoststr = "host "+self.host+" and tcp port "+self.port
+        data = sniff(filter=hoststr,iface=self.iface,prn=self.__get_HTTP,session=TCPSession)
+
+    def __get_HTTP(self, pkt):
+        if pkt.haslayer('TCP'):
+            try:
+                http = pkt.getlayer('TCP').load
+                if len(http) > 6:
+                    self.__handle_pack(http)
+            except:
+                if self.packageBody:
+                    self.__close_pack(self.packageType)
+
+    def __handle_pack(self, http_bytes):
+        try:
+            if http_bytes.find(b'HTTP/1.1') > 0:
+                # Request & Response package are together
+                resp_beg = http_bytes.find(b'HTTP/1.1')
+                if http_bytes.find(b'GET') == 0 or http_bytes.find(b'POST') == 0:
+                    # split the request part
+                    self.packageType = 'Request'
+                    self.packageBody = http_bytes[:resp_beg]
+                    self.__close_pack(self.packageType)
+                if http_bytes[-4:] == b'\r\n\r\n':
+                    # if response is over write it
+                    self.packageType = 'Response'
+                    self.packageBody = http_bytes[resp_beg:]
+                    self.__close_pack(self.packageType)
+                else:
+                    self.packageType = 'Response'
+                    self.packageBody = http_bytes[resp_beg:]
+            elif http_bytes.find(b'GET') == 0 or http_bytes.find(b'POST') == 0:
+                self.packageType = 'Request'
+                self.packageBody = http_bytes
+                self.__close_pack(self.packageType)
+            elif http_bytes.find(b'HTTP/1.1') == 0:
+                self.packageType = 'Response'
+                self.packageBody = http_bytes
+                if http_bytes[-4:] == b'\r\n\r\n' or http_bytes[-4:] == b'0000':
+                    self.packageBody = self.packageBody + http_bytes
+                    self.__close_pack(self.packageType)
+            elif http_bytes.find(b'0000') > 0:
+                self.packageBody = self.packageBody + http_bytes
+                self.__close_pack(self.packageType)
+            else:
+                self.packageBody += http_bytes
+        except:
+            pass
+
+    def __close_pack(self, type=None):
+        # end of package and send to txt file
+        try:
+            txtBody = self.packageBody.decode('utf-8')
+            txtF = re.sub(r'\r\n\r\n[0-9a-f]{4}\r\n\r\n', '', txtBody)
+            self.__write_log('###### '+type+' ######')
+            self.__write_log(txtF.replace('0000', '').replace('\r\n\r\n', ''))
+            self.packageBody = ''
+        except:
+            pass
+
+    def __write_log(self, txtBody):
+        try:
+            fname = 'xlog' + datetime.strftime(datetime.now(), '%Y%d%m') + '.txt'
+            with open(fname, 'a') as f:
+                f.write(txtBody+'\r\n')
+        except:
+            pass
+
+    def __get_ENCODE(self,httpbytes):
+        code = ''
+        if httpbytes:
+            try:
+                char_beg = str(httpbytes).find('charset')
+                char_end = str(httpbytes[char_beg:]).find('\"')
+                if char_beg >= 0:
+                    code = str(httpbytes)[char_beg+8:char_end].replace('\\r','').replace('\\n','')
+            except:
+                pass
+        return code
+
+    def __get_HTML(self,httpbytes):
+        html = ''
+        if self.__get_TYPE(httpbytes) == 'resp':
+            encode = self.__get_ENCODE(httpbytes)
+            if encode:
+                hstr = bytes(httpbytes).decode(encode)
+                b1 = hstr.find('<!DOCTYPE html>')
+                b2 = hstr.find('<html>')
+                try:
+                    if b1 >= 0:
+                        html = hstr[b1:]
+                    elif b2 >= 0:
+                        html = hstr[b2:]
+                except:
+                    print('Getting HTML Error!')
+        return html
+
+if __name__ == "__main__":
+    cfgpath = os.path.join(os.getcwd(), "settings.ini")
+    print(cfgpath)
+    conf = configparser.ConfigParser()
+    conf.read(cfgpath, encoding="utf-8")
+    iface = conf.get('settings', 'iface')
+    ip = conf.get('settings', 'ip')
+    port = conf.get('settings', 'port')
+    h = hcap(ip, port, iface)
+    h.hcap()
+