mod_proxy_ajp错误:将html呈现为text/plain,提示用户"另存为..."

Question

我们有一个奇怪的,间歇性的错误,发生在mod_proxy_ajp,即使用apache作为tomcat服务器的前端.

错误

• 用户点击链接浏览器会提示用户"另存为...."(例如在Firefox中"你选择了顶级开放的thread.jsp,这是一个应用程序/八位字节流"...... firefox应该对这个文件做什么)
• 用户说"嗯？" 并按"取消"
• 用户再次点击同一链接
• 浏览器正确显示页面

此错误间歇性地发生,但遗憾的是很少在我们的测试服务器上并且经常在生产中.

在firefox的LiveHttpHeaders中,我在上面的用例中看到以下内容:

• 首页下载(即点击链接)是"text/plain"
• 第二次下载是"text/html"

我认为问题可能源于ProxyPassReverse(即混淆了是否使用http或ajp),但所有这些proxypassreverse设置都导致了同样的错误:

• ProxyPassReverse/ajp:// localhost:8080 /
• ProxyPassReverse/pe http:// localhost/pe
• ProxyPassReverse/pe http://forumstest.company.com/pe

另外,我检查了apache错误日志(设置为debug),看不到警告或错误......

**但它适用于mod_proxy_http ??**

似乎切换到mod_proxy_http'解决了这个问题.有限的测试,我无法在测试环境中重现问题.

因为这个问题是间歇性的,所以我不能100%确定mod_proxy_http"解决"了这个问题

环境

• Apache 2.2 Windows
• Jboss 4.2.2后端(tomcat 6)

另一个数据点

无论好坏,tomcat中的servlet过滤器会在将html发送到apache之前对其进行gzip压缩.(这意味着额外的工作,因为apache必须在执行ProxyPassReverse的"查找和替换"之前解压缩).我不知道"gzip"是否会混乱.

问题

• 有人见过这个吗？
• 什么工具有助于分析原因？

谢谢

附录1:这是LiveHttpHeaders输出

浏览器错误地将html视为"text/plain"

http://forums.customer.com/pe/action/forums/displaythread?rootPostID=10842016&channelID=1&portalPageId=1002

GET http://forums.customer.com/pe/action/forums/displaythread?rootPostID=10842016&channelID=1&portalPageId=1002 HTTP/1.1
Host: forums.customer.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 ( .NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Proxy-Connection: keep-alive
Cookie: __utma=156962862.829309431.1260304144.1297956514.1297958674.234; __utmz=156962862.1296760237.232.50.utmcsr=forumstest.customer.com|utmccn=(referral)|utmcmd=referral|utmcct=/pe/action/forums/displaythread; s_vi=[CS]v1|258F5B88051D3FC3-40000105C056085F[CE]; inqVital=xd|0^sesMgr|{"sID":4,"lsts":1292598007}^incMgr|{"id":"755563420055418864","group":"CHAT","ltt":1292598006741,"sid":"755563549194447187","igds":"1290627502757","exempt":false}^inq|{"customerID":"755562378269271622"}^saleMgr|{"state":"UNSOLD","qDat":{},"sDat":{}}; inqState=sLnd|1^Lnd|{"c":4,"flt":1274728016,"lldt":17869990,"pgs":{"201198":{"c":1,"flt":1274728016,"lldt":0},"0":{"c":3,"flt":1274845009,"lldt":17752997}},"pq":["0","0","0","201198"],"fsld":1274728016697}; adv_search_results_page=10; ep_beta=1; visitorID=57307059; JSESSIONID=6jXLNdHRDjR9Th3B5gvTVkw1dZLn1zvhvKLR2r4GTLjylHJgjY3Q!683274050; __utmc=156962862; JSESSIONID=6jXLNdHRDjR9Th3B5gvTVkw1dZLn1zvhvKLR2r4GTLjylHJgjY3Q!683274050; TLTHID=5CCA50304DE99E28DB79A7B3267D4231; TLTSID=9DFCDE8045B374AAB752CC98A30E8311; AreCookiesEnabled=1; s_cc=true; SC_LINKS=%5B%5BB%5D%5D; s_sq=%5B%5BB%5D%5D; __utmb=156962862.64.10.1297958674; memberexists=T; ev1=greywolf%20hdtv%20whmx
Cache-Control: max-age=0

HTTP/1.0 200 OK
Date: Thu, 17 Feb 2011 17:38:42 GMT
Content-Type: text/plain
X-Cache: MISS from samus.company.com
X-Cache-Lookup: MISS from samus.company.com:3128
Via: 1.0 samus.company.com:3128 (squid/2.6.STABLE20)
Proxy-Connection: close
----------------------------------------------------------

浏览器正确地将html视为"text/html"

http://forums.customer.com/pe/action/forums/displaythread?rootPostID=10842016&channelID=1&portalPageId=1002

GET http://forums.customer.com/pe/action/forums/displaythread?rootPostID=10842016&channelID=1&portalPageId=1002 HTTP/1.1
Host: forums.customer.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 ( .NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Proxy-Connection: keep-alive
Cookie: __utma=156962862.829309431.1260304144.1297956514.1297958674.234; __utmz=156962862.1296760237.232.50.utmcsr=forumstest.customer.com|utmccn=(referral)|utmcmd=referral|utmcct=/pe/action/forums/displaythread; s_vi=[CS]v1|258F5B88051D3FC3-40000105C056085F[CE]; inqVital=xd|0^sesMgr|{"sID":4,"lsts":1292598007}^incMgr|{"id":"755563420055418864","group":"CHAT","ltt":1292598006741,"sid":"755563549194447187","igds":"1290627502757","exempt":false}^inq|{"customerID":"755562378269271622"}^saleMgr|{"state":"UNSOLD","qDat":{},"sDat":{}}; inqState=sLnd|1^Lnd|{"c":4,"flt":1274728016,"lldt":17869990,"pgs":{"201198":{"c":1,"flt":1274728016,"lldt":0},"0":{"c":3,"flt":1274845009,"lldt":17752997}},"pq":["0","0","0","201198"],"fsld":1274728016697}; adv_search_results_page=10; ep_beta=1; visitorID=57307059; JSESSIONID=6jXLNdHRDjR9Th3B5gvTVkw1dZLn1zvhvKLR2r4GTLjylHJgjY3Q!683274050; __utmc=156962862; JSESSIONID=6jXLNdHRDjR9Th3B5gvTVkw1dZLn1zvhvKLR2r4GTLjylHJgjY3Q!683274050; TLTHID=5CCA50304DE99E28DB79A7B3267D4231; TLTSID=9DFCDE8045B374AAB752CC98A30E8311; AreCookiesEnabled=1; s_cc=true; SC_LINKS=%5B%5BB%5D%5D; s_sq=%5B%5BB%5D%5D; __utmb=156962862.64.10.1297958674; memberexists=T; ev1=greywolf%20hdtv%20whmx
Cache-Control: max-age=0

HTTP/1.0 200 OK
Date: Thu, 17 Feb 2011 17:38:44 GMT
X-Powered-By: Servlet 2.4; JBoss-4.2.1.GA (build: SVNTag=JBoss_4_2_1_GA date=200707131605)/Tomcat-5.5
Content-Encoding: gzip
Content-Type: text/html;charset=UTF-8
Content-Length: 24739
X-Cache: MISS from samus.company.com
X-Cache-Lookup: MISS from samus.company.com:3128
Via: 1.0 samus.company.com:3128 (squid/2.6.STABLE20)
Proxy-Connection: keep-alive
----------------------------------------------------------

附录2:补充资料

浏览器确实收到了"gzipped"文件.当我发现其中一些错误时,我之前点击过"另存为...".Gunzip成功处理了文件并将其转换为html.

Answer 1

答案在这里:如何使用mod_proxy保存通过AJP连接器发送到Apache的Tomcat HTTP响应的Content-Type标头

在apache配置中将DefaultType设置为None.

# DefaultType: the default MIME type the server will use for a document
# if it cannot otherwise determine one, such as from filename extensions.
# If your server contains mostly text or HTML documents, "text/plain" is
# a good value.  If most of your content is binary, such as applications
# or images, you may want to use "application/octet-stream" instead to
# keep browsers from trying to display binary files as though they are
# text.
#
DefaultType None