Tomcat maxpostsize 值被 XMLHttpRequest 忽略？
我正在使用 Spring 3 和 jquery 开发一个 Web 应用程序，并且使用 ajax 上传脚本将文件发送到服务器（Tomcat 7.0.22）。内容类型为 application/octet-stream 的文件已发布到服务器 服务器将其解析为字节数组。然而，尽管我什至在 tomcat 配置中显式地将 maxpostsize 的值设置为 2097152，但此设置似乎根本没有效果。例如，我能够（本地）上传足够大（> 1 GB）的文件以使服务器崩溃（内存不足）。以下是来自 firebug 的请求标头：
Host localhost:8080
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
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
Connection keep-alive
X-Requested-With XMLHttpRequest
X-File-Name some-pdf.pdf
Content-Type application/octet-stream
Referer http://localhost:8080/myapp/
Content-Length 9369597
Cookie JSESSIONID=F237BA8176D158A297BAFA7F57A98A5F;
Pragma no-cache
Cache-Control no-cache
这是 Tomcat 的连接器配置
<Service name="Catalina">
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
maxPostSize="2097152"/>
I am developing a web application with Spring 3 and jquery and i am using an ajax upload script to send files to the server (Tomcat 7.0.22). A file is posted to the server with a content-type of application/octet-stream
and the server parses it fine as a byte array. However although i have even explicitly set in the tomcat configuration the value of maxpostsize to 2097152, this setting appears to have no effect at all. For example i am able to upload files (locally) large enough (> 1 GB) to crash the server (out of memory). Here are the request headers from firebug:
Host localhost:8080
User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1
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
Connection keep-alive
X-Requested-With XMLHttpRequest
X-File-Name some-pdf.pdf
Content-Type application/octet-stream
Referer http://localhost:8080/myapp/
Content-Length 9369597
Cookie JSESSIONID=F237BA8176D158A297BAFA7F57A98A5F;
Pragma no-cache
Cache-Control no-cache
Here is the Tomcat's connector config
<Service name="Catalina">
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443"
maxPostSize="2097152"/>
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虽然这是一个老问题：
正如 Request.java，仅针对“application/x-www-form-urlencoded”内容类型考虑 maxPostSize，并且不受请求方式的影响（“正常”与 xhr）。
Although this is an old question:
As can be seen in Request.java, maxPostSize is taken into account only for the "application/x-www-form-urlencoded" content type and is not affected by how the request is made ("normal" vs. xhr).