小编Ota*_*vio的帖子

我有一个巨大的表,我需要处理其中的所有行.我总是得到这个丢失的连接消息,我无法重新连接并将光标恢复到它的最后位置.这基本上就是我在这里的代码:

#
import MySQLdb

class DB:
  conn = None

  def connect(self):
    self.conn = MySQLdb.connect('hostname', 'user', '*****', 'some_table', cursorclass=MySQLdb.cursors.SSCursor)

  def query(self, sql):
    try:
     cursor = self.conn.cursor()
     cursor.execute(sql)
   except (AttributeError, MySQLdb.OperationalError):
     self.connect()
     cursor = self.conn.cursor()
     cursor.execute(sql)
   return cursor
#

#
db = DB()
sql = "SELECT bla FROM foo"
data = db.query(sql)

for row in data:
    do_something(row)
#

但我总是得到这个:

#
Traceback (most recent call last):
  File "teste.py", line 124, in <module>
   run()
 File "teste.py", line 109, in run
   for row in data: …

使用套接字获取网站时,我遇到了这种奇怪的行为.从下面的get_content()函数返回的字符串包括原始网站上不存在的一些"额外信息".

function get_content($a, $b, $c = "00")
{
    $request  = "arg01="  . $a;
    $request .= "&arg02="  . $b;
    $request .= "&arg03="  . $c;

    $host = "www.site.com";
    $script = "/page.php";
    $method = "POST";

    $request_length = strlen($request);

    $header = "$method $script HTTP/1.1\r\n";
    $header .= "Host: $host\r\n";
    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $header .= "Content-Length: $request_length\r\n";
    $header .= "Connection: close\r\n\r\n";
    $header .= "$request\r\n";

    $socket = @fsockopen($host, 80, $errno, $errstr);
    if ($socket) {
        fputs($socket, $header);
            while(!feof($socket)) {
                $output .= fgets($socket);
            }
        fclose($socket);
    }

    return $output; …