Reverse proxy 将代理协议发送到不使用'；不支持代理协议

我有一个使用反向代理的HTTP加速解决方案。为了向服务器提供客户端IP，我正在尝试在HTTP加速解决方案中添加代理协议支持。虽然HTTP加速解决方案端点本身不能作为服务器的网关，但我需要在服务器中添加代理协议支持，或者在服务器前面添加HA代理

当前代理协议状态：

接收机可被配置为支持协议的版本1和版本2。识别协议版本很容易：

- if the incoming byte count is 16 or above and the 13 first bytes match
  the protocol signature block followed by the protocol version 2 :

       \x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A\x02

- otherwise, if the incoming byte count is 8 or above, and the 5 first
  characters match the US-ASCII representation of "PROXY" then the protocol
  must be parsed as version 1 :

       \x50\x52\x4F\x58\x59

- otherwise the protocol is not covered by this specification and the
  connection must be dropped.

我的服务器主要是支持代理协议的nginx。虽然我的http服务器很少不支持代理协议

我的问题是，如果服务器不支持该协议，它们是否能够正确解析包含代理协议头的TCP/HTTP有效负载

同样，我想知道为什么代理协议规范没有将其作为TCP/Ip头选项： 这样，不了解该选项的服务器将忽略该选项，使其对不支持该选项的服务器完全透明。 支持该协议的服务器将丢弃没有代理协议选项的数据包

我的问题是，如果服务器不支持该协议，它们是否能够正确解析包含代理协议头的TCP/HTTP有效负载

不，不支持代理协议的服务器将无法将请求解析为HTTP，因为它不是以有效的HTTP方法开头的

只需省略不支持代理协议的后端服务器的指令。请记住，您将丢失有关客户端的信息，除非您在诸如

X-Forwarded-For

之类的标题中传递这些信息

我的问题是，如果服务器不支持该协议，它们是否能够正确解析包含代理协议头的TCP/HTTP有效负载

不，不支持代理协议的服务器将无法将请求解析为HTTP，因为它不是以有效的HTTP方法开头的

---

只需省略不支持代理协议的后端服务器的指令。请记住，您将丢失有关客户端的信息，除非您在头中传递这些信息，例如

X-Forwarded-For

以下是代理协议信息的示例：

如果服务器不支持该协议，他们是否能够正确解析包含代理协议头的TCP/HTTP有效负载

这取决于服务器实现

例如，我尝试将代理协议信息发送到python的HTTPServer，它抛出了400个错误代码。以下是解析标头的服务器的实现：

def parse_request(self):
    """Parse a request (internal).

    The request should be stored in self.raw_requestline; the results
    are in self.command, self.path, self.request_version and
    self.headers.

    Return True for success, False for failure; on failure, an
    error is sent back.

    """
    self.command = None  # set in case of error on the first line
    self.request_version = version = self.default_request_version
    self.close_connection = 1
    requestline = self.raw_requestline
    requestline = requestline.rstrip('\r\n')
    self.requestline = requestline
    words = requestline.split()
    if len(words) == 3:
        command, path, version = words
        if version[:5] != 'HTTP/':
            self.send_error(400, "Bad request version (%r)" % version)
            return False
        try:
            base_version_number = version.split('/', 1)[1]
            version_number = base_version_number.split(".")
            # RFC 2145 section 3.1 says there can be only one "." and
            #   - major and minor numbers MUST be treated as
            #      separate integers;
            #   - HTTP/2.4 is a lower version than HTTP/2.13, which in
            #      turn is lower than HTTP/12.3;
            #   - Leading zeros MUST be ignored by recipients.
            if len(version_number) != 2:
                raise ValueError
            version_number = int(version_number[0]), int(version_number[1])
        except (ValueError, IndexError):
            self.send_error(400, "Bad request version (%r)" % version)
            return False
        if version_number >= (1, 1) and self.protocol_version >= "HTTP/1.1":
            self.close_connection = 0
        if version_number >= (2, 0):
            self.send_error(505,
                      "Invalid HTTP Version (%s)" % base_version_number)
            return False
    elif len(words) == 2:
        command, path = words
        self.close_connection = 1
        if command != 'GET':
            self.send_error(400,
                            "Bad HTTP/0.9 request type (%r)" % command)
            return False
    elif not words:
        return False
    else:
        self.send_error(400, "Bad request syntax (%r)" % requestline)
        return False
    self.command, self.path, self.request_version = command, path, version

    # Examine the headers and look for a Connection directive
    self.headers = self.MessageClass(self.rfile, 0)

    conntype = self.headers.get('Connection', "")
    if conntype.lower() == 'close':
        self.close_connection = 1
    elif (conntype.lower() == 'keep-alive' and
          self.protocol_version >= "HTTP/1.1"):
        self.close_connection = 0
    return True

请注意，代理协议有效负载例如：

代理服务器TCP4 192.168.73.178 192.168.73.185 52406 80

包含6个单词。如果报头有3、2个字或没有字，这个特定的服务器实现将处理REQUEST。否则会抛出400错误代码

else:
    self.send_error(400, "Bad request syntax (%r)" % requestline)
    return False

然而，当我尝试用相同的HAProxy配置向tomcat服务器发送相同的信息时，它只是忽略了负载

---

一般来说，我会谨慎行事，不发送代理信息，除非我知道它能够显式地处理它

以下是代理协议信息的示例：

如果服务器不支持该协议，他们是否能够正确解析包含代理协议头的TCP/HTTP有效负载

这取决于服务器实现

例如，我尝试将代理协议信息发送到python的HTTPServer，它抛出了400个错误代码。以下是解析标头的服务器的实现：

def parse_request(self):
    """Parse a request (internal).

    The request should be stored in self.raw_requestline; the results
    are in self.command, self.path, self.request_version and
    self.headers.

    Return True for success, False for failure; on failure, an
    error is sent back.

    """
    self.command = None  # set in case of error on the first line
    self.request_version = version = self.default_request_version
    self.close_connection = 1
    requestline = self.raw_requestline
    requestline = requestline.rstrip('\r\n')
    self.requestline = requestline
    words = requestline.split()
    if len(words) == 3:
        command, path, version = words
        if version[:5] != 'HTTP/':
            self.send_error(400, "Bad request version (%r)" % version)
            return False
        try:
            base_version_number = version.split('/', 1)[1]
            version_number = base_version_number.split(".")
            # RFC 2145 section 3.1 says there can be only one "." and
            #   - major and minor numbers MUST be treated as
            #      separate integers;
            #   - HTTP/2.4 is a lower version than HTTP/2.13, which in
            #      turn is lower than HTTP/12.3;
            #   - Leading zeros MUST be ignored by recipients.
            if len(version_number) != 2:
                raise ValueError
            version_number = int(version_number[0]), int(version_number[1])
        except (ValueError, IndexError):
            self.send_error(400, "Bad request version (%r)" % version)
            return False
        if version_number >= (1, 1) and self.protocol_version >= "HTTP/1.1":
            self.close_connection = 0
        if version_number >= (2, 0):
            self.send_error(505,
                      "Invalid HTTP Version (%s)" % base_version_number)
            return False
    elif len(words) == 2:
        command, path = words
        self.close_connection = 1
        if command != 'GET':
            self.send_error(400,
                            "Bad HTTP/0.9 request type (%r)" % command)
            return False
    elif not words:
        return False
    else:
        self.send_error(400, "Bad request syntax (%r)" % requestline)
        return False
    self.command, self.path, self.request_version = command, path, version

    # Examine the headers and look for a Connection directive
    self.headers = self.MessageClass(self.rfile, 0)

    conntype = self.headers.get('Connection', "")
    if conntype.lower() == 'close':
        self.close_connection = 1
    elif (conntype.lower() == 'keep-alive' and
          self.protocol_version >= "HTTP/1.1"):
        self.close_connection = 0
    return True

请注意，代理协议有效负载例如：

代理服务器TCP4 192.168.73.178 192.168.73.185 52406 80

包含6个单词。如果报头有3、2个字或没有字，这个特定的服务器实现将处理REQUEST。否则会抛出400错误代码

else:
    self.send_error(400, "Bad request syntax (%r)" % requestline)
    return False

然而，当我尝试用相同的HAProxy配置向tomcat服务器发送相同的信息时，它只是忽略了负载

一般来说，我会谨慎行事，不发送代理信息，除非我知道它能够显式地处理它