"CONNECT" + 空格 + 目标连接地址 + ":" + 目标连接端口 + 空格 + "HTTP/1.1" + Chr(13) + Chr(10) + "Host:" + 空格 + 目标连接地址 + ":" + 目标连接端口 + Chr(13) + Chr(10) + "Authorization: Basic" + 空格 + 经Base64加密过后的[用户名:密码] + Chr(13) + Chr(10) + Chr(13) + Chr(10) + "Proxy-Authorization: Basic" + 空格 + 经Base64加密过后的[用户名:密码] + Chr(13) + Chr(10) + Chr(13) + Chr(10)
进入讨论组讨论。
发送请求完毕后,将收到代理的回应,根据RFC说明(注意 Status-Line 和 Status-Code):
6 Response
After receiving and interpreting a request message, a server responds
with an HTTP response message.
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Response = Status-Line ; Section 6.1
*(( general-header ; Section 4.5
response-header ; Section 6.2
entity-header ) CRLF) ; Section 7.1
CRLF
[ message-body ] ; Section 7.2
6.1 Status-Line
The first line of a Response message is the Status-Line, consisting
of the protocol version followed by a numeric status code and its
associated textual phrase, with each element separated by SP
characters. No CR or LF is allowed except in the final CRLF sequence.
Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF
6.1.1 Status Code and Reason Phrase
The Status-Code element is a 3-digit integer result code of the
attempt to understand and satisfy the request. These codes are fully
defined in section 10. The Reason-Phrase is intended to give a short
textual description of the Status-Code. The Status-Code is intended
for use by automata and the Reason-Phrase is intended for the human
user. The client is not required to examine or display the Reason-
Phrase.
The first digit of the Status-Code defines the class of response. The
last two digits do not have any categorization role. There are 5
values for the first digit:
- 1xx: Informational - Request received, continuing process
- 2xx: Success - The action was successfully received,
understood, and accepted
- 3xx: Redirection - Further action must be taken in order to
complete the request
- 4xx: Client Error - The request contains bad syntax or cannot
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