Why I get 411 Length required error

Question

This is how I call a service with  NET   var requestedURL    https   accounts google com o oauth2 token code     code     amp client id     client id     amp client secret     client secret     amp redirect uri     redirect uri     amp grant type authorization code   HttpWebRequest authRequest    HttpWebRequest WebRequest Create requestedURL   authRequest ContentType    application x-www-form-urlencoded   authRequest Method    POST   WebResponse authResponseTwitter   authRequest GetResponse      but when this method is invoked  I get      Exception Details  System Net WebException  The remote server returned   an error   411  Length Required    what should I do

User · Answer

Hey i m using Volley and was getting Server error 411  I added to the getHeaders method the following line     params put  Content-Length   0      And it solved my issue

User · Answer

Change the way you requested the method from POST to GET

User · Answer

When you re using HttpWebRequest and POST method  you have to set a content  or a body if you prefer  via the RequestStream  But  according to your code  using authRequest Method    GET  should be enough   In case you re wondering about POST format  here s what you have to do    ASCIIEncoding encoder   new ASCIIEncoding    byte   data   encoder GetBytes serializedObject      a json object  or xml  whatever     HttpWebRequest request   WebRequest Create url  as HttpWebRequest  request Method    POST   request ContentType    application json   request ContentLength   data Length  request Expect    application json    request GetRequestStream   Write data  0  data Length    HttpWebResponse response   request GetResponse   as HttpWebResponse

User · Answer

Google search  2nd result   System Net WebException  The remote server returned an error   411  Length Required        This is a pretty common issue that comes up when trying to make call a   REST based API method through POST  Luckily  there is a simple fix for   this one       This is the code I was using to call the Windows Azure Management API    This particular API call requires the request method to be set as   POST  however there is no information that needs to be sent to the   server    var request    HttpWebRequest  HttpWebRequest Create requestUri   request Headers Add  x-ms-version    2012-08-01    request Method    POST   request ContentType    application xml        To fix this error  add an explicit content length to your request   before making the API call       request ContentLength   0

User · Answer

var requestedURL    https   accounts google com o oauth2 token code     code     amp client id     client id     amp client secret     client secret     amp redirect uri     redirect uri     amp grant type authorization code   HttpWebRequest authRequest    HttpWebRequest WebRequest Create requestedURL   authRequest ContentType    application x-www-form-urlencoded   authRequest Method    POST     Set content length to 0 authRequest ContentLength   0  WebResponse authResponseTwitter   authRequest GetResponse      The ContentLength property contains the value to send as the Content-length HTTP header with the request   Any value other than -1 in the ContentLength property indicates that the request uploads data and that only methods that upload data are allowed to be set in the Method property   After the ContentLength property is set to a value  that number of bytes must be written to the request stream that is returned by calling the GetRequestStream method or both the BeginGetRequestStream and the EndGetRequestStream methods   for more details click here

User · Answer

When you make a POST HttpWebRequest  you must specify the length of the data you are sending  something like   string data    something you need to send  byte   postBytes   Encoding ASCII GetBytes data   request ContentLength   postBytes Length    if you are not sending any data  just set it to 0  that means you just have to add to your code this line   request ContentLength   0    Usually  if you are not sending any data  chosing the GET method instead is wiser  as you can see in the HTTP RFC

User · Answer

I had the same error when I imported web requests from fiddler captured sessions to Visual Studio webtests  Some POST requests did not have a StringHttpBody tag  I added an empty one to them and the error was gone  Add this after the Headers tag        lt StringHttpBody ContentType    InsertByteOrderMark  False  gt     lt  StringHttpBody gt

User · Answer

you need to add Content-Length  0 in  your request header   a very descriptive example of how to test is given here

[c#] Why I get 411 Length required error?

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