Reasons for a 409 Conflict HTTP error when uploading a file to sharepoint using a NET WebRequest

Question

I ve got a method that uses a WebRequest to upload a file to a sharepoint 2010 list folder  using a PUT request  with the Overwrite Header set to T  overwrite    When several files are uploaded  method is called several times   some requests fail with a 409 Conflict HTTP error   I ve googled  and it seems the most common reason is trying to affect update a file that does not exist  like setting the request URL to a path without a file name   However  that is not the case  In case the conflict had something to do with the file already existing  I added code to physically delete the file before uploading it  and i m still getting some 409 s   Has anyone received this type of error  and if so  can you tell me how you fixed it and what was the root cause  Any help is greatly appreciated  Thanks

User · Answer

I got this error when tried to create folder http   localhost 8080 repository default parent newFolder when http   localhost 8080 repository default parent  didn t exist

User · Answer

I found 2 things worth mentioning while uploading files using webdav and http web request  First  for the provider I was using  I had to append the filename at the end of the provider url  Ihad to append the port number in the url  And I also set the Request method to PUT instead of POST   example   string webdavUrl    https   localhost 443 downloads test pdf   request Method    PUT

User · Answer

Since no answers were posted  I found the following here      The Web server  running the Web site  thinks that the request submitted by the client  e g  your Web browser or our CheckUpDown robot  can not be completed because it conflicts with some rule already established  For example  you may get a 409 error if you try to upload a file to the Web server which is older than the one already there - resulting in a version control conflict    Someone on a similar question right here on stackoverflow  said the answer was       I ve had this issue when I was referencing the url of the document   library and not the destination file itself       i e  try http   server name document library name new file name doc   However I am 100  sure this was not my case  since I checked the WebRequest s URI property several times and the URI was complete with filename  and all the folders in the path existed on the sharepoint site   Anyways  I hope this helps someone

User · Answer

I encountered similar issue when uploading a file returned 409   Besides issues mentioned above it can also happen due to file size restrictions for POST on the server side  For example  tomcat  java web server  have POST size limit of 2MB by default

User · Answer

I is because you are using predefined variables to naming your filename  change your filename from e g register asp to registerUser asp  That will solve your issue

User · Answer

We are also getting the same error while we are trying to access a same resource with in milliseconds  Like if i try to POST some data to www abc com blog and with in milliseconds an other request will also go for the same resource i e  www abc com blog from the same user  So it ll give the 409 error

User · Answer

Its because of wrong path provided  It may be that the url contains space and if the case url has to be properly constructed   The correct url should be in the format with file name included like   http   server name document library name new file name   So if report xlsx is the file that has to be uploaded at  http   server name Team Dev Team  then path comes out to be is  http   server name Team Dev Team report xlsx   It contains space so it should be reconstructed as  http   server name Team Dev 20Team report xlsx  and should be used

User · Answer

At times the error code 409 occurs when you name you folder or files a reserved or blocked name  These could be names like register  contact In my case I named a folder contact  turns out the name was blocked from being used as folder names  When testing my script on postman  I was getting this error   lt script gt      document cookie    quot humans 21909 1 quot   document location reload true   lt  script gt   I changed the folder name from contact to contacts and it worked  The error was gone

[.net] Reasons for a 409/Conflict HTTP error when uploading a file to sharepoint using a .NET WebRequest?

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