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Write a simple TCP program for a server that accepts lines of input from a client and prints the lines onto the server’s standard output. (You can do this by modifying the TCPServer.py program in the text.) Compile and execute your program. On any other machine that contains a Web browser, set the proxy server in the browser to the host that is running your server program; also configure the port number appropriately. Your browser should now send its GET request messages to your server, and your server should display the messages on its standard output. Use this platform to determine whether your browser generates conditional GET messages for objects that are locally cached.

时间: 2023-05-11 09:04:01 浏览: 332
Sure, I can help you with that. Here is a simple TCP program for a server that accepts lines of input from a client and prints the lines onto the server’s standard output: ``` import socket HOST = '' # Symbolic name meaning all available interfaces PORT = 5000 # Arbitrary non-privileged port # Create a TCP/IP socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Bind the socket to a specific address and port sock.bind((HOST, PORT)) # Listen for incoming connections sock.listen(1) print('Server listening on port', PORT) while True: # Wait for a connection print('Waiting for a client connection...') conn, addr = sock.accept() print('Connected by', addr) # Receive data from the client and print it to the server's standard output while True: data = conn.recv(1024) if not data: break print(data.decode('utf-8')) # Close the connection conn.close() print('Client disconnected') ``` To compile and execute the program, save it as `server.py` and run it from the command line using the command `python server.py`. To test the program, you can open a Web browser on another machine and set the proxy server in the browser to the host that is running your server program (e.g. `localhost` or the IP address of the machine running the server). Then, configure the port number appropriately (in this case, `5000`). Your browser should now send its GET request messages to your server, and your server should display the messages on its standard output. Regarding your question about whether the browser generates conditional GET messages for objects that are locally cached, I'm not sure. It would depend on the specific browser and its caching behavior.
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fatal: [192.168.5.158]: FAILED! => {"changed": true, "cmd": "cd /usr/src/php-5.3.28/ && ./configure --prefix=/usr/local/php5 --with-gd --with-zlib --with-mysql=/usr/local/mysql --with-config-file-path=/usr/local/php5 --enable-mbstring --enable-fpm --with-jpeg-dir=/usr/lib && make && make install", "delta": "0:00:07.761196", "end": "2025-06-26 15:07:53.247233", "msg": "non-zero return code", "rc": 1, "start": "2025-06-26 15:07:45.486037", "stderr": "configure: warning: bison versions supported for regeneration of the Zend/PHP parsers: 1.28 1.35 1.75 1.875 2.0 2.1 2.2 2.3 2.4 2.4.1 2.4.2 2.4.3 2.5 2.5.1 2.6 2.6.1 2.6.2 2.6.4 (found: none).\nconfigure: warning: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.\nconfigure: error: Cannot find MySQL header files under /usr/local/mysql.\nNote that the MySQL client library is not bundled anymore!", "stderr_lines": ["configure: warning: bison versions supported for regeneration of the Zend/PHP parsers: 1.28 1.35 1.75 1.875 2.0 2.1 2.2 2.3 2.4 2.4.1 2.4.2 2.4.3 2.5 2.5.1 2.6 2.6.1 2.6.2 2.6.4 (found: none).", "configure: warning: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.", "configure: error: Cannot find MySQL header files under /usr/local/mysql.", "Note that the MySQL client library is not bundled anymore!"], "stdout": "creating cache ./config.cache\nchecking for Cygwin environment... no\nchecking for mingw32 environment... no\nchecking for egrep... grep -E\nchecking for a sed that does not truncate output... /usr/bin/sed\nchecking host system type... x86_64-unknown-linux-gnu\nchecking target system type... x86_64-unknown-linux-gnu\nchecking for gcc... gcc\nchecking whether the C compiler (gcc ) works... yes\nchecking whether the C compiler (gcc ) is a cross-compiler... no\nchecking whether we are using GNU C... yes\nchecking whether gcc accepts -g... yes\nchecking how to run the C preprocessor... gcc -E\nchecking for icc... no\nchecking for suncc... no\nchecking 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", "", "\u001b[1mConfiguring SAPI modules\u001b[m", "checking for AOLserver support... no", "checking for Apache 1.x module support via DSO through APXS... no", "checking for Apache 1.x module support... no", "checking whether to enable Apache charset compatibility option... no", "checking for Apache 2.0 filter-module support via DSO through APXS... no", "checking for Apache 2.0 handler-module support via DSO through APXS... no", "checking for Apache 1.x (hooks) module support via DSO through APXS... no", "checking for Apache 1.x (hooks) module support... no", "checking whether to enable Apache charset compatibility option... no", "checking for Caudium support... no", "checking for CLI build... yes", "checking for Continuity support... no", "checking for embedded SAPI library support... no", "checking for FPM build... yes", "checking for setenv... yes", "checking for clearenv... yes", "checking for setproctitle... no", "checking for library containing socket... none required", "checking for library containing inet_addr... none required", "checking for errno.h... yes", "checking for fcntl.h... yes", "checking for stdio.h... yes", "checking for stdlib.h... yes", "checking for unistd.h... yes", "checking for sys/uio.h... yes", "checking for sys/select.h... yes", "checking for sys/socket.h... yes", "checking for sys/time.h... yes", "checking for arpa/inet.h... yes", "checking for netinet/in.h... yes", "checking for sysexits.h... yes", "checking for prctl... yes", "checking for clock_gettime... yes", "checking for ptrace... yes", "checking whether ptrace works... yes", "checking for proc mem file... mem", "checking if gcc supports __sync_bool_compare_and_swap... yes", "checking for TCP_INFO... yes", "checking for sysconf... yes", "checking for times... yes", "checking for kqueue... no", "checking for port framework... no", "checking for /dev/poll... no", "checking for epoll... yes", "checking for poll... yes", "checking for select... yes", "checking for Zeus ISAPI support... no", "checking for LiteSpeed support... no", "checking for Milter support... no", "checking for NSAPI support... no", "checking for PHTTPD support... no", "checking for Pi3Web support... no", "checking whether Roxen module is build using ZTS... no", "checking for Roxen/Pike support... ", "checking for thttpd... no", "checking for TUX... no", "checking for webjames... no", "checking for chosen SAPI module... fpm", "", "\u001b[1mRunning system checks\u001b[m", "checking for sendmail... no", "checking whether system uses EBCDIC... no", "checking whether byte ordering is bigendian... no", "checking whether writing to stdout works... 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(cached) yes", "checking for sys/socket.h... (cached) yes", "checking for sys/stat.h... yes", "checking for sys/statfs.h... yes", "checking for sys/statvfs.h... yes", "checking for sys/vfs.h... yes", "checking for sys/sysexits.h... no", "checking for sys/varargs.h... no", "checking for sys/wait.h... yes", "checking for sys/loadavg.h... no", "checking for termios.h... yes", "checking for unistd.h... (cached) yes", "checking for unix.h... no", "checking for utime.h... yes", "checking for sys/utsname.h... yes", "checking for sys/ipc.h... yes", "checking for dlfcn.h... yes", "checking for assert.h... (cached) yes", "checking for fopencookie... yes", "checking for broken getcwd... no", "checking for broken libc stdio... yes", "checking whether struct tm is in sys/time.h or time.h... time.h", "checking for tm_zone in struct tm... yes", "checking for missing declarations of reentrant functions... done", "checking for fclose declaration... ok", "checking for tm_gmtoff in struct tm... yes", "checking for struct flock... yes", "checking for socklen_t... yes", "checking size of size_t... 8", "checking size of long long... 8", "checking size of long long int... 8", "checking size of long... 8", "checking size of int... 4", "checking size of intmax_t... 8", "checking size of ssize_t... 8", "checking size of ptrdiff_t... 8", "checking for st_blksize in struct stat... yes", "checking for st_blocks in struct stat... yes", "checking for st_rdev in struct stat... yes", "checking for size_t... yes", "checking for uid_t in sys/types.h... yes", "checking for struct sockaddr_storage... yes", "checking for field sa_len in struct sockaddr... no", "checking for IPv6 support... yes", "checking for vprintf... yes", "checking for alphasort... yes", "checking for asctime_r... yes", "checking for chroot... yes", "checking for ctime_r... yes", "checking for cuserid... yes", "checking for crypt... no", "checking for flock... yes", "checking for ftok... yes", "checking for funopen... no", "checking for gai_strerror... yes", "checking for gcvt... yes", "checking for getloadavg... yes", "checking for getlogin... yes", "checking for getprotobyname... yes", "checking for getprotobynumber... yes", "checking for getservbyname... yes", "checking for getservbyport... yes", "checking for gethostname... 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(cached) yes", "checking which regex library to use... php", "checking whether to enable LIBXML support... yes", "checking libxml2 install dir... no", "checking for xml2-config path... /usr/bin/xml2-config", "checking whether libxml build works... yes", "checking for OpenSSL support... no", "checking for Kerberos support... no", "checking for PCRE library to use... bundled", "checking whether to enable the SQLite3 extension... yes", "checking bundled sqlite3 library... yes", "checking for ZLIB support... yes", "checking if the location of ZLIB install directory is defined... no", "checking for gzgets in -lz... yes", "checking whether to enable bc style precision math functions... no", "checking for BZip2 support... no", "checking whether to enable calendar conversion support... no", "checking whether to enable ctype functions... yes", "checking for cURL support... no", "checking if we should use cURL for url streams... no", "checking for QDBM support... no", "checking for GDBM support... no", "checking for NDBM support... no", "checking for Berkeley DB4 support... no", "checking for Berkeley DB3 support... no", "checking for Berkeley DB2 support... no", "checking for DB1 support... no", "checking for DBM support... no", "checking for CDB support... no", "checking for INI File support... no", "checking for FlatFile support... no", "checking whether to enable DBA interface... no", "checking whether to enable DOM support... yes", "checking for xml2-config path... 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(cached) no", "checking size of short... 2", "checking size of int... (cached) 4", "checking size of long... (cached) 8", "checking size of long long... (cached) 8", "checking for iconv support... yes", "checking for iconv... yes", "checking if iconv is glibc's... yes", "checking if iconv supports errno... yes", "checking if your cpp allows macro usage in include lines... yes", "checking for IMAP support... no", "checking for IMAP Kerberos support... no", "checking for IMAP SSL support... no", "checking for InterBase support... no", "checking whether to enable internationalization support... no", "checking whether to enable JavaScript Object Serialization support... yes", "checking for ANSI C header files... (cached) yes", "checking for LDAP support... no", "checking for LDAP Cyrus SASL support... no", "checking whether to enable multibyte string support... yes", "checking whether to enable multibyte regex support... yes", "checking whether to check multibyte regex backtrack... yes", "checking for external libmbfl... no", "checking for external oniguruma... no", "checking for variable length prototypes and stdarg.h... yes", "checking for stdlib.h... (cached) yes", "checking for string.h... (cached) yes", "checking for strings.h... yes", "checking for unistd.h... (cached) yes", "checking for sys/time.h... (cached) yes", "checking for sys/times.h... yes", "checking for stdarg.h... (cached) yes", "checking size of int... (cached) 4", "checking size of short... (cached) 2", "checking size of long... (cached) 8", "checking for working const... yes", "checking whether time.h and sys/time.h may both be included... yes", "checking for working alloca.h... (cached) yes", "checking for alloca... (cached) yes", "checking for 8-bit clean memcmp... yes", "checking for stdarg.h... (cached) yes", "checking for mcrypt support... no", "checking for MSSQL support via FreeTDS... no", "checking for MySQL support... yes", "checking for specified location of the MySQL UNIX socket... no"]}

翻译: bind_address Command-Line Format --bind-address=addr System Variable bind_address Scope Global Dynamic No SET_VAR Hint Applies No Type String Default Value * The MySQL server listens on one or more network sockets for TCP/IP connections. Each socket is bound to one address, but it is possible for an address to map onto multiple network interfaces. To specify how the server should listen for TCP/IP connections, set the bind_address system variable at server startup. The server also has an admin_address system variable that enables administrative connections on a dedicated interface. See Section 7.1.12.1, “Connection Interfaces”. If bind_address is specified, its value must satisfy these requirements: Prior to MySQL 8.0.13, bind_address accepts a single address value, which may specify a single non-wildcard IP address or host name, or one of the wildcard address formats that permit listening on multiple network interfaces (*, 0.0.0.0, or ::). As of MySQL 8.0.13, bind_address accepts either a single value as just described, or a list of comma-separated values. When the variable names a list of multiple values, each value must specify a single non-wildcard IP address (either IPv4 or IPv6) or a host name. Wildcard address formats (*, 0.0.0.0, or ::) are not allowed in a list of values. As of MySQL 8.0.22, addresses may include a network namespace specifier. IP addresses can be specified as IPv4 or IPv6 addresses. For any value that is a host name, the server resolves the name to an IP address and binds to that address. If a host name resolves to multiple IP addresses, the server uses the first IPv4 address if there are any, or the first IPv6 address otherwise. The server treats different types of addresses as follows: If the address is *, the server accepts TCP/IP connections on all server host IPv4 interfaces, and, if the server host supports IPv6, on all IPv6 interfaces. Use this address to permit both IPv4 and IPv6 connections on all server interfaces. This value is the default. If the variable specifies a list of multiple values, this value is not permitted. If the address is 0.0.0.0, the server accepts TCP/IP connections on all server host IPv4 interfaces. If the variable specifies a list of multiple values, this value is not permitted. If the address is ::, the server accepts TCP/IP connections on all server host IPv4 and IPv6 interfaces. If the variable specifies a list of multiple values, this value is not permitted. If the address is an IPv4-mapped address, the server accepts TCP/IP connections for that address, in either IPv4 or IPv6 format. For example, if the server is bound to ::ffff:127.0.0.1, clients can connect using --host=127.0.0.1 or --host=::ffff:127.0.0.1. If the address is a “regular” IPv4 or IPv6 address (such as 127.0.0.1 or ::1), the server accepts TCP/IP connections only for that IPv4 or IPv6 address. These rules apply to specifying a network namespace for an address: A network namespace can be specified for an IP address or a host name. A network namespace cannot be specified for a wildcard IP address. For a given address, the network namespace is optional. If given, it must be specified as a /ns suffix immediately following the address. An address with no /ns suffix uses the host system global namespace. The global namespace is therefore the default. An address with a /ns suffix uses the namespace named ns. The host system must support network namespaces and each named namespace must previously have been set up. Naming a nonexistent namespace produces an error. If the variable value specifies multiple addresses, it can include addresses in the global namespace, in named namespaces, or a mix. For additional information about network namespaces, see Section 7.1.14, “Network Namespace Support”. If binding to any address fails, the server produces an error and does not start. Examples: bind_address=* The server listens on all IPv4 or IPv6 addresses, as specified by the * wildcard. bind_address=198.51.100.20 The server listens only on the 198.51.100.20 IPv4 address. bind_address=198.51.100.20,2001:db8:0:f101::1 The server listens on the 198.51.100.20 IPv4 address and the 2001:db8:0:f101::1 IPv6 address. bind_address=198.51.100.20,* This produces an error because wildcard addresses are not permitted when bind_address names a list of multiple values. bind_address=198.51.100.20/red,2001:db8:0:f101::1/blue,192.0.2.50 The server listens on the 198.51.100.20 IPv4 address in the red namespace, the 2001:db8:0:f101::1 IPv6 address in the blue namespace, and the 192.0.2.50 IPv4 address in the global namespace. When bind_address names a single value (wildcard or non-wildcard), the server listens on a single socket, which for a wildcard address may be bound to multiple network interfaces. When bind_address names a list of multiple values, the server listens on one socket per value, with each socket bound to a single network interface. The number of sockets is linear with the number of values specified. Depending on operating system connection-acceptance efficiency, long value lists might incur a performance penalty for accepting TCP/IP connections. Because file descriptors are allocated for listening sockets and network namespace files, it may be necessary to increase the open_files_limit system variable. If you intend to bind the server to a specific address, be sure that the mysql.user system table contains an account with administrative privileges that you can use to connect to that address. Otherwise, you cannot shut down the server. For example, if you bind the server to *, you can connect to it using all existing accounts. But if you bind the server to ::1, it accepts connections only on that address. In that case, first make sure that the 'root'@'::1' account is present in the mysql.user table so you can still connect to the server to shut it down.

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