📄 http proxy是什么？.htm
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<TD bgColor=#6595d6 height=25><IMG height=11
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Proxy是什么？</STRONG></TD></TR>
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<TD width=64>作 者</TD>
<TD width=233>fineman</TD>
<TD width=63>阅读次数</TD>
<TD width=85>743</TD>
<TD width=63>回复次数</TD>
<TD width=85>1</TD></TR>
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<TD width=64>所属栏目</TD>
<TD width=233>基础应用与新手入门>> IT英语</TD>
<TD width=63>发表日期</TD>
<TD width=85>2006-4-10</TD>
<TD width=63>回复日期</TD>
<TD
width=85>2006-8-22</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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<DIV class=userInfoBox>积分：4243<BR>第二级</DIV>
<DIV class=userInfoBox>注册时间<BR>2005-11-7</DIV></DIV></TD>
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<DIV class=TitleInfoBox align=right>发表时间：2006-4-10 17:54:55 楼主</DIV>
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<DIV id=cont_right style="WIDTH: 495px">In the context of the WWW, an HTTP
Proxy is an intermediary program which acts as both an HTTP Server and an
HTTP Client, receiving a request from a Client (in most cases a Browser)
and then acting as an HTTP Client and making requests on behalf of other
HTTP Clients. However, requests to an HTTP Proxy can also be serviced
internally, for example if the HTTP Proxy uses its Cache instead of
sending a request to the origin HTTP Server. In order to use an HTTP
Proxy, the HTTP Client's request has to be explicitly addressed to the
HTTP Proxy, which then sends a request to the origin HTTP Server. An HTTP
Proxy may also perform a protocol conversion, for example a Browser may
send an HTTP request to the HTTP Proxy referencing an FTP resource, and
the HTTP Proxy then acts as FTP Client to retrieve the resource from the
FTP Server using FTP, and eventually the resource is sent back from the
HTTP Proxy to the Browser using HTTP.<BR><BR></DIV></TD></TR>
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<DIV class=userInfoBox>积分：9956<BR>第三级</DIV>
<DIV class=userInfoBox>注册时间<BR>2006-8-17</DIV></DIV></TD>
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<DIV class=TitleInfoBox align=right>发表时间：2006-8-22 9:46:17 第1楼</DIV>
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<DIV id=cont_right
style="WIDTH: 495px">就万维网的现状，那些扮演着HTTP服务器和HTTP客户端的HTTP代理服务器是一个中间媒介服务器，它从客户端收到请求（在许多情况下是从浏览器）,然后又扮演着HTTP
客户端和做请求代表其它HTTP客户端。<BR><BR>但是，向HTTP代理服务器发送请求同样可以得到服务，例如：如果HTTP代理服务器使用它的缓存来替代向起源HTTP服务器发送请求的话，则这个HTTP客户端的请求向HTTP代理服务器发送了它的详细地址，当然它也发送了这个请求到起源HTTP服务器。<BR><BR>一个HTTP代理服务器同样执行协议转换，例如：一个浏览器向HTTP代理服务器发送一个HTTP请求时要参考FTP资源，HTTP代理服务器则扮演着FTP客户端通过使用FTP从FTP服务器检索FTP资源，最终这些资源从HTTP代理服务被返回给使用HTTP的浏览器。</DIV></TD></TR>
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