python - Partial read from Socket.File.Read -

im coding python script connects remote server, , parses returned response. odd reason, 9 out of 10 times, once header read, script continues , returns before getting body of response. im no expert @ python, im code correct on python side of things. here code:

class miniclient: "client support class simple internet protocols."  def __init__(self, host, port):     "connect internet server."       self.sock = socket.socket(socket.af_inet, socket.sock_stream)     self.sock.settimeout(30)      try:         self.sock.connect((host, port))         self.file = self.sock.makefile("rb")      except socket.error, e:          #if e[0]    == 111:         #   print   "connection refused server %s on port %d" % (host,port)         raise   def writeline(self, line):     "send line server."      try:         # updated sendall resolve partial data transfer errors         self.sock.sendall(line + crlf) # unbuffered write      except socket.error, e:         if e[0] == 32 : #broken pipe             self.sock.close() # mutual close             self.sock = none          raise e      except socket.timeout:         self.sock.close() # mutual close         self.sock = none         raise  def readline(self):     "read line server.  strip trailing cr and/or lf."      s = self.file.readline()      if not s:         raise eoferror      if s[-2:] == crlf:         s = s[:-2]      elif s[-1:] in crlf:         s = s[:-1]      return s   def read(self, maxbytes = none):     "read data server."      if maxbytes none:         return self.file.read()      else:         return self.file.read(maxbytes)   def shutdown(self):      if self.sock:         self.sock.shutdown(1)   def close(self):      if self.sock:         self.sock.close()         self.sock = none 

i use readline() method read through headers until reach empty line (delimiter between headers , body). there, objects call "read()" method read body. stated before, 9 of 10 times, read returns nothing, or partial data.

example use:

try:     http = miniclient(host, port)  except exception, e:      if e[0] == 111:         print   "connection refused server %s on port %d" % (host,port)      raise  http.writeline("get %s http/1.1" % str(document)) http.writeline("host: %s" % host) http.writeline("connection: close") # not keep-alive http.writeline("") http.shutdown() # nice, tell http server we're done sending request  # determine status statuscode = 0 status = string.split(http.readline()) if status[0] != "http/1.1":     print "miniclient: unknown status response (%s)" % str(status[0])  try:     statuscode = string.atoi(status[1]) except valueerror:     print "miniclient: non-numeric status code (%s)" % str(status[1])  #extract headers headers = [] while 1:     line = http.readline()     if not line:         break     headers.append(line)  http.close() # done  #check got valid http response if statuscode == 200:     return http.read() else:     return "e\nh\terr\nd\thttp error %s \"%s\"\n$\terr\t$" % (str(statuscode), str(status[2])) 

incorrect answer removed, not yet deleted (so comments can live while.)