[python&php 网络编程]socket的错误捕捉

1.python写法

import sys
import socket
import argparse 


def main():
    # setup argument parsing
    parser = argparse.ArgumentParser(description='Socket Error Examples')
    parser.add_argument('--host', action="store", dest="host", required=False)
    parser.add_argument('--port', action="store", dest="port", type=int, required=False)
    parser.add_argument('--file', action="store", dest="file", required=False)
    given_args = parser.parse_args()
    host = given_args.host
    port = given_args.port
    filename = given_args.file
    
    # First try-except block -- create socket 
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    except socket.error, e:
        print "Error creating socket: %s" % e
        sys.exit(1)
    
    # Second try-except block -- connect to given host/port
    try:
        s.connect((host, port))
    except socket.gaierror, e:
        print "Address-related error connecting to server: %s" % e
        sys.exit(1)
    except socket.error, e:
        print "Connection error: %s" % e
        sys.exit(1)
    
    # Third try-except block -- sending data
    try:
        s.sendall("GET %s HTTP/1.0\r\n\r\n" % filename)
    except socket.error, e:
        print "Error sending data: %s" % e
        sys.exit(1)
    
    while 1:
        # Fourth tr-except block -- waiting to receive data from remote host
        try:
            buf = s.recv(2048)
        except socket.error, e:
            print "Error receiving data: %s" % e
            sys.exit(1)
        if not len(buf):
            break
        # write the received data
        sys.stdout.write(buf) 
    
if __name__ == '__main__':
    main()

2.php写法

getMessage());
}

# Fourth tr-except block -- waiting to receive data from remote host
while (1) {
    if (false !== ($bytes = socket_recv($socket, $file, 2048, MSG_WAITALL))) {
        printf("Read %s bytes from socket_recv(). Closing socket...", $bytes);
    } else {
        printf("Error receiving data: %s\n" . socket_strerror(socket_last_error($socket)));
    }
}

python如果提示argparse这个库没有的话，请使用pip install argparse来安装，php我在pecl上搜了下，php貌似没有想python的argparse这样的库，据说pear有个叫command line的包，不过我没有试过，毕竟 php直接以php-cli方式运行的情况不多，所以这个功能对于php也没有多大的意义，以变量代替吧～ 

python对于socket的错误捕捉，已经有现成的Exception class，而php可以使用socket_last_error来捕捉错误，try catch到Exception类也可以有相关提示，但是socket_last_error会更具体～

转载请标注原文地址：http://blog.csdn.net/ddjohn/article/details/49992391