Using BaseHTTPServer to encounter system blocking

[zzs027]

BaseHTTPServer encounter system blocking

I write my code to process the http requests using Post method like this

    
def do_POST(self):
    t1 = time.time()
    mpath, margs = urllib.request.splitquery(self.path)
    datas        = self.rfile.read(int(self.headers['content-length']))

then I find that system call was blocked when receiving connection request
I used strace command, it show

Error:
strace: Process 28286 attached
recvfrom(4, 

used gdb, it show

Error:
0x00007fdc8fb0287f in __libc_recv (fd=4, buf=0x55f39c0, n=8192, flags=0) at ../sysdeps/unix/sysv/linux/x86_64/recv.c:28

How to solve this problem