S Ahmed wrote:
Tomcat 6
Spring MVC, where my controllers method has both httpservletrequest and
httpservletresponse as parameters.
The point is that I want to know the effects of others sending me large
values in a http post (not an image upload, but a form post).
I'm assuming once it is sent by the client as a http post, and my servlet
responds to the request tomcat has already streamed that data and whether I
do:
String p1 = request.getParameter("big_payload")
or not, it has already been loaded into memory.
Am I correct?
To me, it seems that Konstantin already answered those questions precisely and in detail
below.
Is there a maximize size setting in tomcat?
On Wed, Jan 4, 2012 at 1:03 PM, Konstantin Kolinko
<knst.koli...@gmail.com>wrote:
2012/1/4 S Ahmed <sahmed1...@gmail.com>:
Say I have a simple servlet or spring mvc application running on tomcat.
Tomcat is running as a webserver on port 80.
A client makes a http POST request to my page www.example.com/submit
If the client adds a very large file with the POST, does this mean that
when my servlet code starts to execute, tomcat already has the entire
request content in memory? (including the very large POST parameter)
1. Tomcat version =?
2. What API are you using to read the file?
In general request processing starts after the headers in HTTP request
have been read. At that point you can call getInputStream() and read
the body of the POST request while it is being received from the
client.
But if you call certain APIs (e.g. getParameter()) the call will hang
until entire POST request body is received from the client and
processed. It is said that those methods "consume" the body of a POST
request.
3. In most implementations large file uploads are not stored in
memory, but are written to a temporary file on your hard drive. (So
the request body is processed, but you cannot say that it is "in
memory").
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