Question

我可以使用Curl将文件上传到我的Apache Web服务器：

echo "[$(date)] file contents." | curl -T - http://WEB-SERVER/upload/sample.put

但是，如果我在其间放置一个Squid代理服务器，那么我无法：

echo "[$(date)] file contents." | curl -x http://SQUID-PROXY:3128 -T - http://WEB-SERVER/upload/sample.put

Curl报告以下错误：

注意：此错误响应采用HTML格式，但我删除了标签以便于阅读。

ERROR: The requested URL could not be retrieved

ERROR
The requested URL could not be retrieved

While trying to retrieve the URL:
http://WEB-SERVER/upload/sample.put

The following error was encountered:
Unsupported Request Method and Protocol

Squid does not support all request methods for all access protocols.
For example, you can not POST a Gopher request.
Your cache administrator is root.

我的squid.conf似乎没有任何基于src或dst IP地址或protocol IP地址或者method不允许的ACL /规则HTTP HTTP POST ... ，因为我可以在同一个客户端和Web服务器之间做HTTP PUT，并且中间有相同的代理。

如果netcat失败，要查看实际发生的请求和响应流量，我在Curl和Squid之间放置了一个PUT http://WEB-SERVER/upload/sample.put HTTP/1.1 User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5 Host: WEB-SERVER Pragma: no-cache Accept: */* Proxy-Connection: Keep-Alive Transfer-Encoding: chunked Expect: 100-continue进程，这就是我所看到的：< / p>

请求：

HTTP/1.0 501 Not Implemented
Server: squid/2.6.STABLE21
Date: Sun, 13 May 2012 02:11:39 GMT
Content-Type: text/html
Content-Length: 1078
Expires: Sun, 13 May 2012 02:11:39 GMT
X-Squid-Error: ERR_UNSUP_REQ 0
X-Cache: MISS from SQUID-PROXY-FQDN
X-Cache-Lookup: NONE from SQUID-PROXY-FQDN:3128
Via: 1.0 SQUID-PROXY-FQDN:3128 (squid/2.6.STABLE21)
Proxy-Connection: close

<SNIPPED the HTML error response already shown earlier above>

响应：

{{1}}

注意：出于可读性原因，我已将IP地址和服务器名称匿名化。

Answer 1

感谢Amos Jeffries在squid-users forum上回答这个问题。问题基本上是版本3.1之前的Squid没有实现HTTP 1.1，因此拒绝了分块传输编码。

无法通过Squid Proxy测试基于HTTP PUT的文件上传

1 个答案: