Data size limit with Web Service Extension(WSE)

If you are using web service extension, watch out for size restriction based on the version of WSE

1. WSE 1.0
There is no size restriction on this. So if your web service and client with WSE 1.0, you won't have any problem.

2. WSE 2.0/3.0
In WSE 2.0/3.0, Microsoft introduced maxRequestLength which limits the amount of data transferred per request for a web service.
By default this will be 4 MB (4096KB). You can set it to unlimited by setting it -1 as follows in web.config.

<httpRuntime executionTimeout="90"
maxRequestLength="-1"
useFullyQualifiedRedirectUrl="false"
minFreeThreads="8"
minLocalRequestFreeThreads="4"
appRequestQueueLimit="100"/>


or as follows in app.config for a windows based application.

<microsoft.web.services2>
<messaging>
<maxRequestLength>-1</maxRequestLength>
</messaging>
</microsoft.web.services2>

However to avoid DOS (Denial of Service) attack, it is always advisable to set this to a resonable limit based on your requirements.

If you try to download more data then the limit set, you will get following error
WSE352: The size of the record exceed its limit


Hope this helps.

DebugGuru