Python Socket 将数据附加到发送的字节（TCP）答案

【问题标题】：Python Socket appends data to bytes sent (TCP)Python Socket 将数据附加到发送的字节（TCP）
【发布时间】：2018-10-13 07:50:48
【问题描述】：

我一直在尝试向 TCP 服务器发送消息，编写了一个简单的脚本来向服务器发送字节数组。问题是我发送了 59 个字节，但服务器是超过 13K 字节的接收器。当我调用 socket.send(MESSAGE) 时会附加一些信息。我怎样才能修剪它，或者我可以通过哪些参数来绕过它？

import socket
import time
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 7046))
s.send('39080080380000000000000400000000000000000007092250121018001'.encode())
print ('connected')
data = s.recv(1024)
s.close()
print ('Received', repr(data))

The dumb data received by the server is as below:

30 38 30 30 38 30 33 38 30 30 30 30 30 30 30 30         0800803800000000
30 30 30 30 30 34 30 30 30 30 30 30 30 30 30 30         0000040000000000
30 30 30 30 30 30 30 30 30 37 30 39 32 32 35 30         0000000007092250
31 32 31 30 31 38 30 30 31 00 00 00 00 00 00 00         121018001.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
60 d0 4d a4 62 7f 00 00 b8 6d d1 a3 62 7f 00 00         `.M.b....m..b...
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
c0 91 28 a4 62 7f 00 00 00 00 00 00 00 00 00 00         ..(.b...........
c0 8b 28 a4 62 7f 00 00 00 00 00 00 00 00 00 00         ..(.b...........
c0 9a 28 a4 62 7f 00 00 00 00 00 00 00 00 00 00         ..(.b...........
20 00 00 9c 62 7f 00 00 00 00 00 00 00 00 00 00          ...b...........
00 00 00 00 00 00 00 00 31 32 37 2e 30 2e 30 2e         ........127.0.0.
31 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         1...............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 67 d1 a3 62 7f 00 00 60 45 f6 00 00 00 00 00         .g..b...`E......
00 67 d1 a3 62 7f 00 00 01 00 00 00 00 00 00 00         .g..b...........
00 00 00 00 00 00 00 00 00 70 16 b3 de 87 5d 44         .........p....]D
1a 64 fe ed 9a 85 b9 21 00 00 00 00 00 00 00 00         .d.....!........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
70 52 33 a5 62 7f 00 00 70 52 33 a5 62 7f 00 00         pR3.b...pR3.b...
19 4e 00 00 11 4e 00 00 e0 69 d1 a3 62 7f 00 00         .N...N...i..b...
e0 69 d1 a3 62 7f 00 00 e0 ff ff ff ff ff ff ff         .i..b...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
30 5f d1 a3 62 7f 00 00 00 00 00 00 01 00 00 00         0_..b...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................    
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
56 d0 00 f1 04 57 1f 00 00 67 d1 a3 62 7f 00 00         V....W...g..b...
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
c4 24 40 00 00 00 00 00 70 5d 2a 08 fd 7f 00 00         .$@.....p]*.....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 60 51 a3 62 7f 00 00 00 10 80 00 00 00 00 00         .`Q.b...........
00 10 00 00 00 00 00 00 00 10 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00         .ELF............
03 00 3e 00 01 00 00 00 80 10 00 00 00 00 00 00         ..>.............
40 00 00 00 00 00 00 00 f0 50 00 00 00 00 00 00         @........P......
00 00 00 00 40 00 38 00 07 00 40 00 1e 00 1b 00         ....@.8...@.....
01 00 00 00 05 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
a2 37 00 00 00 00 00 00 a2 37 00 00 00 00 00 00         .7.......7......
00 00 20 00 00 00 00 00 01 00 00 00 06 00 00 00         .. .............
a8 3d 00 00 00 00 00 00 a8 3d 20 00 00 00 00 00         .=.......= .....
a8 3d 20 00 00 00 00 00 58 03 00 00 00 00 00 00         .= .....X.......
60 03 00 00 00 00 00 00 00 00 20 00 00 00 00 00         `......... .....
02 00 00 00 06 00 00 00 d0 3d 00 00 00 00 00 00         .........=......
d0 3d 20 00 00 00 00 00 d0 3d 20 00 00 00 00 00         .= ......= .....
00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00         ................
08 00 00 00 00 00 00 00 04 00 00 00 04 00 00 00         ................
c8 01 00 00 00 00 00 00 c8 01 00 00 00 00 00 00         ................
c8 01 00 00 00 00 00 00 24 00 00 00 00 00 00 00         ........$.......
24 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00         $...............
50 e5 74 64 04 00 00 00 f4 34 00 00 00 00 00 00         P.td.....4......
f4 34 00 00 00 00 00 00 f4 34 00 00 00 00 00 00         .4.......4......
5c 00 00 00 00 00 00 00 5c 00 00 00 00 00 00 00         \.......\.......
04 00 00 00 00 00 00 00 51 e5 74 64 06 00 00 00         ........Q.td....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00         ................
52 e5 74 64 04 00 00 00 a8 3d 00 00 00 00 00 00         R.td.....=......
a8 3d 20 00 00 00 00 00 a8 3d 20 00 00 00 00 00         .= ......= .....
58 02 00 00 00 00 00 00 58 02 00 00 00 00 00 00         X.......X.......
01 00 00 00 00 00 00 00 04 00 00 00 14 00 00 00         ................
03 00 00 00 47 4e 55 00 6b 72 51 56 77 2c c6 1e         ....GNU.krQVw,..
d4 75 2b 8e 39 e9 6c 28 01 88 ab 33 00 00 00 00         .u+.9.l(...3....
03 00 00 00 21 00 00 00 02 00 00 00 07 00 00 00         ....!...........
80 10 07 08 00 01 41 59 08 04 00 05 88 04 e0 00         ......AY........
21 00 00 00 25 00 00 00 2a 00 00 00 10 98 d1 ae         !...%...*.......
ba e3 92 7c 36 5f 4f 36 43 45 d5 ec 28 c8 f2 71         ...|6_O6CE..(..q
76 4d 27 97 d8 71 58 1c f4 fb b8 68 b9 8d f1 0e         vM'..qX....h....
ea d3 ef 0e 10 c9 0d e6 0d 7e f1 d6 00 00 00 00         .........~......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 03 00 09 00         ................
b0 0e 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
ab 00 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 01 00 00 00 20 00 00 00         ............ ...
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
61 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00         a... ...........
00 00 00 00 00 00 00 00 7c 01 00 00 12 00 00 00         ........|.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
c9 02 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 38 01 00 00 12 00 00 00         ........8.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
f9 02 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 6e 01 00 00 12 00 00 00         ........n.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
e1 02 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 1c 00 00 00 20 00 00 00         ............ ...
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
38 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00         8... ...........
00 00 00 00 00 00 00 00 f8 00 00 00 10 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
52 00 00 00 22 00 00 00 00 00 00 00 00 00 00 00         R..."...........
00 00 00 00 00 00 00 00 75 01 00 00 12 00 00 00         ........u.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
dc 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 b9 00 00 00 12 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
50 01 00 00 12 00 00 00 00 00 00 00 00 00 00 00         P...............
00 00 00 00 00 00 00 00 59 01 00 00 12 00 00 00         ........Y.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
33 01 00 00 12 00 00 00 00 00 00 00 00 00 00 00         3...............
00 00 00 00 00 00 00 00 c1 00 00 00 10 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
b2 00 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 3f 01 00 00 12 00 00 00         ........?.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
99 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 67 01 00 00 12 00 00 00         ........g.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
a0 01 00 00 10 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 60 01 00 00 12 00 00 00         ........`.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
19 01 00 00 10 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 c1 01 00 00 12 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
b2 01 00 00 12 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 c2 02 00 00 12 00 00 00         ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
83 01 00 00 10 00 00 00 00 00 00 00 00 00 00 00         ................
00 00 00 00 00 00 00 00 75 00 00 00 12 00 0b 00         ........u.......
65 11 00 00 00 00 00 00 dd 04 00 00 00 00 00 00         e...............
4a 03 00 00 10 00 19 00 08 41 20 00 00 00 00 00         J........A .....
00 00 00 00 00 00 00 00 22 02 00 00 12 00 0b 00         ........".......
20 20 00 00 00 00 00 00 dd 04 00 00 00 00 00 00           ..............
37 03 00 00 10 00 18 00 00 41 20 00 00 00 00 00         7........A .....
00 00 00 00 00 00 00 00 47 02 00 00 12 00 0b 00         ........G.......
fd 24 00 00 00 00 00 00 dd 04 00 00 00 00 00 00         .$..............
fa 01 00 00 12 00 0b 00 1f 1b 00 00 00 00 00 00         ................
01 05 00 00 00 00 00 00 3e 03 00 00 10 00 19 00         ........>.......
00 41 20 00 00 00 00 00 00 00 00 00 00 00 00 00         .A .............
d6 01 00 00 12 00 0b 00 42 16 00 00 00 00 00 00         ........B.......
dd 04 00 00 00 00 00 00 10 00 00 00 12 00 09 00         ................
b0 0e 00 00 00 00 00 00 00 00 00 00 00 00 00 00         ................
16 00 00 00 12 00 0c 00 24 31 00 00 00 00 00 00         ........$1......
00 00 00 00 00 00 00 00 97 02 00 00 12 00 0b 00         ................
b7 2e 00 00 00 00 00 00 0f 02 00 00 00 00 00 00         ................
6f 02 00 00 12 00 0b 00 da 29 00 00 00 00 00 00         o........)......
dd 04 00 00 00 00 00 00 00 5f 5f 67 6d 6f 6e 5f         ........._gmon
73 74 61 72 74 5f 5f 00 5f 69 6e 69 74 00 5f 66         start__._init._f
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64 5f 52 65 73 75 6d 65 00 5f 5f 67 78 78 5f 70         d_Resume.__gxx_p
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31 34 4c 6f 63 61 74 65 4d 65 6d 6f 72 79 49 64         14LocateMemoryId
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63 00 5f 5a 31 35 43 72 65 61 74 65 43 68 61 6e         c._Z15CreateChan
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74 69 6c 50 4b 63 53 32 5f 00 5f 5a 31 35 4c 6f         tilPKcS2_._Z15Lo
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5a 31 38 43 72 65 61 74 65 54 61 73 6b 4d 65 6d         Z18CreateTaskMem
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74 69 6c 50 4b 63 00 5f 5a 31 38 4c 6f 63 61 74         tilPKc._Z18Locat
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45 7a 44 65 62 75 67 55 74 69 6c 50 4b 63 00 5f         EzDebugUtilPKc._
5a 31 34 57 72 69 74 65 43 68 61 6e 6e 65 6c 49         Z14WriteChannelI
64 50 31 31 45 7a 44 65 62 75 67 55 74 69 6c 69         dP11EzDebugUtili
50 4b 63 53 32 5f 50 63 69 00 6d 65 6d 63 70 79         PKcS2_Pci.memcpy
00 5f 5a 4e 53 74 38 69 6f 73 5f 62 61 73 65 34         ._ZNSt8ios_base4
49 6e 69 74 43 31 45 76 00 5f 5a 4e 53 74 38 69         InitC1Ev._ZNSt8i
6f 73 5f 62 61 73 65 34 49 6e 69 74 44 31 45 76         os_base4InitD1Ev
00 5f 5f 63 78 61 5f 61 74 65 78 69 74 00 6c 69         .__cxa_atexit.li
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6d 2e 73 6f 2e 36 00 6c 69 62 67 63 63 5f 73 2e         m.so.6.libgcc_s.
73 6f 2e 31 00 6c 69 62 63 2e 73 6f 2e 36 00 5f         so.1.libc.so.6._
65 64 61 74 61 00 5f 5f 62 73 73 5f 73 74 61 72         edata.__bss_star
74 00 5f 65 6e 64 00 6c 69 62 65 7a 63 68 61 6e         t._end.libezchan
6e 65 6c 74 6f 6f 6c 73 2e 73 6f 2e 31 2e 30 2e         neltools.so.1.0.
30 00 47 43 43 5f 33 2e 30 00 43 58 58 41 42 49         0.GCC_3.0.CXXABI
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00 47 4c 49 42 43 5f 32 2e 31 34 00 47 4c 49 42         .GLIBC_2.14.GLIB
43 5f 32 2e 32 2e 35 00 00 00 00 00 02 00 00 00         C_2.2.5.........
00 00 02 00 03 00 02 00 02 00 02 00 03 00 00 00         ................
00 00 00 00 02 00 02 00 00 00 02 00 02 00 02 00         ................
02 00 00 00 02 00 02 00 00 00 02 00 00 00 02 00         ................
00 00 04 00 05 00 06 00 00 00 01 00 01 00 01 00         ................
01 00 01 00 01 00 01 00 01 00 01 00 01 00 01 00         ................
01 00 00 00 00 00 00 00 01 00 01 00 1f 03 00 00         ................
10 00 00 00 20 00 00 00 50 26 79 0b 00 00 05 00         .... ...P&y.....
6a 03 00 00 00 00 00 00 01 00 02 00 06 03 00 00         j...............
10 00 00 00 30 00 00 00 d3 af 6b 05 00 00 04 00         ....0.....k.....
72 03 00 00 10 00 00 00 74 29 92 08 00 00 03 00         r.......t)......
7d 03 00 00 00 00 00 00 01 00 02 00 2d 03 00 00         }...........-...
10 00 00 00 00 00 00 00 94 91 96 06 00 00 06 00         ................
89 03 00 00 10 00 00 00 75 1a 69 09 00 00 02 00         ........u.i.....
94 03 00 00 00 00 00 00 a8 3d 20 00 00 00 00 00         .........= .....
08 00 00 00 00 00 00 00 30 11 00 00 00 00 00 00         ........0.......
b0 3d 20 00 00 00 00 00 08 00 00 00 00 00 00 00         .= .............
0e 31 00 00 00 00 00 00 b8 3d 20 00 00 00 00 00         .1.......= .....
08 00 00 00 00 00 00 00 f0 10 00 00 00 00 00 00         ................
c8 3d 20 00 00 00 00 00 08 00 00 00 00 00 00 00         .= .............

【问题讨论】：

你的服务器代码是什么？
这是第三方服务器，我唯一能做的就是检查 tcpdump
那么是什么让您相信服务器实际上收到了更长的数据包？也许服务器只收到了您发送的内容，然后还是发送了更长的响应。
我有来自运行服务器的公司的联系人正在检查他的转储日志。这是一个 ISO8583 服务器，所以他收到的消息比应该接受的要长。
我认为 Steffen Ullrich 是正确的：您发送的正是您发送的；由于您发送的内容，他们发回了 10976 个字节。您的代码没有发送他们期望的内容——他们期望在数据之前有一个两个字节长度的前缀——然后他们的代码因此而中断。

标签： python sockets tcp

【解决方案1】：

我非常怀疑问题只是你的程序。使用netcat 作为未修改程序连接到的服务器的快速检查显示：

$ nc -l 7046  | hd
00000000  33 39 30 38 30 30 38 30  33 38 30 30 30 30 30 30  |3908008038000000|
00000010  30 30 30 30 30 30 30 34  30 30 30 30 30 30 30 30  |0000000400000000|
00000020  30 30 30 30 30 30 30 30  30 30 30 37 30 39 32 32  |0000000000070922|

换句话说 - 它只收到了您希望发送的内容。

不过，来自服务器的转储很有趣：

30 38 30 30 38 30 33 38 30 30 30 30 30 30 30 30         0800803800000000

它缺少您在开始时发送的39。这让我相信服务器将其解释为您发送的数据的长度，根据我在Wireshark: ISO 8583-1 中找到的信息，这实际上是使用 TCP 作为传输协议时的情况。

只是，看起来服务器没有使用 ASCII 39 作为您假设的长度，而是使用二进制表示 0x3339，即 13113 十进制，这与您的 声明非常匹配......但服务器是接收器超过 13K 字节” 。然后服务器可能会盲目地认为这是消息的长度而不检查实际长度——这在Heartbleed attack 中可以看到非常危险。就像在 Heartbleed 中一样，您实际上有一个未初始化的缓冲区，从您的问题中可以看出，该缓冲区当前包含 ELF 二进制文件的一部分，但也可能包含一些敏感数据。

无论如何，您的代码可能应该按照服务器的预期以二进制形式发送消息长度。这可能看起来像这样：

import struct
...
msg = b'080080380000000000000400000000000000000007092250121018001'
s.send(struct.pack('>H',len(msg)) + msg)

【讨论】：

你我的朋友是个超级英雄。这就像一个魅力。谢谢大佬，C# 中是否有类似的功能？
@WanKenobi：见Convert a ushort value into two byte values in C#。但请注意字节顺序，看起来您的服务器需要大端，而那里的示例显示小端 - 即您可能需要切换分配给哪个字节的内容。