Hi I'm encountering an error saying Request is too large in my Umbraco CMS when uploading large file. Now I've read that I need to modify the Configuration Editor in IIS specifically the UploadReadAheadSize now upon opening the configuration it's value is set to 41265 may I know if this is in KB? or MB? Basically I want to be able to upload file bigger than 20mb. What value should I place here?
https://learn.microsoft.com/en-us/iis/configuration/system.webserver/serverruntime says
The maxRequestEntityAllowed and uploadReadAheadSize attributes respectively configure limits for the maximum number of bytes allowed in the entity body of a request and the number of bytes a Web server will read into a buffer and pass to an ISAPI extension.
(emphasis mine)
To increase the file upload limit in iis you could use the requestFiltering feature:
1)Open iis manager, select your site.
2)Select Requests Filtering and open it by double-clicking the icon. The Request Filtering pane displays.
3)From the Actions pane on the right-hand side of the screen click the Edit Feature Settings... link. The Edit Request Filtering Settings window displays.
4)In the Request Limits section, enter the appropriate Maximum allowed content length (Bytes) and then click the OK button.
5)Restart IIS.
Related
I'm currently working on an ASP.NET MVC website and it works fine.
But I have a problem that I don't understand at all... When I launch my website on Visual Studio with Chrome for example no problem, but when I stop it and try to launch an other test with Firefox for example, my url is growing and then I get this error :
HTTP 400. The size of the request headers is too long.
Can someone explain me why this is happening ? Is it something with my code or does it come from IIS express or anything else ?
Thanks in advance
You can probably increase the size of requests your webserver will allow. However, take a look at the amount and the size of cookies your browser are sending to the server. Clear your cookies and try again, and see if you can reduce the size and amount of cookies your app is using. The less, the better! Mobile browsers can get these errors, as they don't allow the same size as do desktop browsers(?).
The error can also mean the query string is getting too large.
.NET MVC SOLUTION FOR ME
In my case, it was my claims that was multiplying my session cookies to look as below in my browser cookies:
.AspNet.ApplicationCookie
.AspNet.ApplicationCookieC1
.AspNet.ApplicationCookieC2
.AspNet.ApplicationCookieC3
.AspNet.ApplicationCookieC4
.AspNet.ApplicationCookieC5
.AspNet.ApplicationCookieC6
.AspNet.ApplicationCookieC7
__RequestVerificationToken
I simply went to aspNetUserClaims table in my mssql management studio and cleared it. Then cleared the browser cookie for the project.
Refreshed the page. Kalas!!! Done!!
I believe it happened because I was switching from one database connectionstring to another which caused the claimsManager to recreate session and add to my cookie. On saturation, everyting exploded.
Check the MSDN:
Cause
This issue may occur when the user is a member of many Active
Directory user groups. When a user is a member of a large number of
active directory groups the Kerberos authentication token for the user
increases in size. The HTTP request that the user sends to the IIS
server contains the Kerberos token in the WWW-Authenticate header, and
the header size increases as the number of groups goes up. If the
HTTP header or packet size increases past the limits configured in
IIS, IIS may reject the request and send this error as the response.
Resolution
To work around this problem, choose one of the following options:
A) Decrease the number of Active Directory groups that the user is a
member of.
OR
B) Modify the MaxFieldLength and the MaxRequestBytes registry settings
on the IIS server so the user's request headers are not considered too
long. To determine the appropriate settings for the MaxFieldLength
and the MaxRequestBytes registry entries, use the following
calculations:
Calculate the size of the user's Kerberos token using the formula described in the following article:
New resolution for problems with Kerberos authentication when users belong to many groups
http://support.microsoft.com/kb/327825
Configure the MaxFieldLength and the MaxRequestBytes registry keys on the IIS server with a value of 4/3 * T, where T is the user's token
size, in bytes. HTTP encodes the Kerberos token using base64 encoding
and therefore replaces every 3 bytes in the token with 4 base64
encoded bytes. Changes that are made to the registry will not take
effect until you restart the HTTP service. Additionally, you may have
to restart any related IIS services.
try this
<system.web>
<httpRuntime maxRequestLength="2097151" executionTimeout="2097151" />
</system.web>
The maxRequestLength default size is 4096 KB (4 MB).
if browser request some resource again and again , at some time request header value length increase by number of times so we may try to extend request length to max length.
i hope this may usefull
In windows system generally this error occurs due to the default header size limits set in the http.sys service. This service acts as a protective layer before requests are forwarded to the application to prevent it from being overwhelmed by invalid requests.
You can override the default max header limit by modifying the windows registry.
Follow the steps :
Run regedit
From the address bar go to the address : Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters or drill down manually.
Right click on "Parameters" > New > DWORD
Rename the new entry to MaxFieldLength
Right click the newly created MaxFieldLength, modify it and set the value to desired max individual header size in bytes, make sure base is set to decimal.
Do the same for MaxRequestBytes. Make it sufficiently higher to match value set in MaxFieldLength.
Open command prompt as administrator
Enter the command "net stop http" (make sure visual studio or other interfering programs are closed)
Enter the command "net start http"
Resources:
Enabling logging
Supported parameters
In my case, I had cookies from a number of different apps served on my localhost with large cookies. FF differentiates by host-name so clearing my cookies from localhost fixed it.
Following Ifeanyi Chukwu's answer, for my case, I tried with private mode (Incognito) and it works fine. Then I go to browser settings and delete cookies of my site (localhost). That fixes the issue.
As you may already figured out issue, a simple temporary solution would be to switch your browser while debugging.
How to limit traffic for the whole server with IIS7?
There is a limit feature for a site, but it works only for a separate site:
Also there is Bitrate Throtting plugin for IIS, but as I know it can be configured only for a separate user:
Is there a way to configure traffic limits for the whole server, not for a single web-site?
UPDATE:
The solution is (thanks to #Arpit) setting <webLimits maxGlobalBandwidth="1000000" /> to machine config. But be careful! There is an error in IIS docs: you should type maxGlobalBand[w]idth (with lower case w), not maxGlobalBand[W]idth (with upper case W).
Well, I have not tried it yet but you can give it a go -
In IIS7, Select the server and open the Configuration Editor. On the right hand pane, there is an option to search the configuration. We are looking for webLimits here.
This might be the key. More information about webLimits can be found here
EDIT -
I found this attribute for webLimits which should help :
maxGlobalBandwidth - Specifies the maximum total bandwidth for the server. Setting the value to 0 enables unlimited bandwidth for the server.
The default value is 4294967295.
from java applet I am sending post request to asp classic. I am sending a very large data in this request ,which is csv data, when number of character in this request increases and get more then 138000 then asp does not accept the request and java applet give 500 error, so can anybody tell me how can I increase the size limit of accept request of asp classic.
Hard to say without knowing your server version.
If IIS6 you would change the AspMaxRequestEntityAllowed property in the metabase (i think the default was 200KB on IIS6)
If IIS7, simply pop into Control Panel - Administrative Tools - IIS Admin & Click your site and expand it then click the ASP icon.
Expand the Limits Properties icon, and change the value in the “Maximum Requesting Entity Body Limit” to a value larger than 200000 (which is about 200kb).
I have implemented a small method
for my site where I upload an image. using a FileUpload control, I choose an image, and then when I hit a button, the UploadImage() method is generated.
The UploadImage() method stores the image in a folder in the server and stores its path in the Database. It also checks the file size of the image, if greater than a megabyte, an alert is displayed, else, the image is upload and stored. This has been tested with a few images ranging from 45KB to 900KB. It has worked perfectly.
THE PROBLEM:
When tested with a few images of approximately 4MB, sometimes it shows the 'error' since it is greater than 1MB, but at other times (I do not know why), Google Chrome directs me to a page telling me that the localhost has been interrupted.
When debugging, I do not even enter the button Upload click method! I find this very strange. The extension of the image doesn't seem to be the problem since I am testing with .jpg and .png.
Did some one experience the same problem? Is there a guru that can help me?
Thank you very much.
update:
it seems that files of 4052kb have worked correctly (i.e. an error message was displayed)
but files over 4098kb) resulted in a local host interrupt. When the button is clicked,
the browser below shows 'sending request' and uploading (0%) and displays "The connection to localhost was interrupted."
Please take a look at the maxRequestLength of the httpRuntime element of the web.config.
http://msdn.microsoft.com/en-us/library/e1f13641.aspx
This is where you set the maximum request length. When it is exceeded, the runtime throws an exception. The default size is 4096KB.
I suspect the answer is no (or at least, not in an intelligent manner), but felt like asking.
Is it possible in an asp.net HttpModule to determine the page that is going to be returned to the user, taking default page settings of IIS into account (without hardcoding them outside of IIS). For example, if a user requests http://www.example.org/bar/, the real page might be http://www.example.org/bar/index.html -- but could just as easily be http://www.example.org/bar/foot.html , depending on the user's IIS settings.
You're correct: in cases where there was no file.ext available in the requested URL, the IIS settings would have to be available in order to determine the actual page that was returned.
Given that the module has to live on the IIS server, I think you could get the list of default pages configured in IIS by connecting via WMI. You'd then have to get the list of files in the requested folder to figure out which of the default pages was actually returned.