无法通过Squid代理测试基于HTTP PUT的文件上传 [英] Unable to test HTTP PUT-based file upload via Squid Proxy

问题描述

我可以使用Curl将文件上传到我的Apache Web服务器上:

I can upload a file to my Apache web server using Curl just fine:

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

但是，如果我在两者之间放置一个Squid代理服务器，那么我将无法:

However, if I put a Squid proxy server in between, then I am not able to:

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

Curl报告以下错误:

Curl reports the following error:

注意:此错误响应为HTML格式，但为了方便阅读，我删除了这些标签.

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 似乎没有基于 src 或 dst IP地址应禁止的ACL/规则或 protocol 或HTTP method ... ，因为我可以在同一客户端和Web服务器，并且两者之间有相同的代理服务器.

My squid.conf doesn't seem to be having any ACL/rule that should disallow based on the src or dst IP addresses, or the protocol, or the HTTP method... as I can do an HTTP POST just fine between the same client and the web server, with the same proxy sitting in between.

在 HTTP PUT 失败的情况下，为了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 netcat 进程，并且这就是我所看到的:

In case of the failing HTTP PUT case, to see the request and response traffic that was actually occurring, I placed a netcat process in between Curl and Squid, and this is what I saw:

请求:

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

回复:

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>

注意:出于可读性原因，我一直对IP地址和服务器名称进行匿名化.

推荐答案

感谢Amos Jeffries在

Thanks to Amos Jeffries for answering this on squid-users forum. The issue is basically that Squid before version 3.1 does not implement HTTP 1.1 and thus rejects the chunked transfer encoding.

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