The etag value \'\"1\"\' specified in one of the request headers is not valid. Please make sure only one etag value is specified and is valid.

Question

I try to receive data from a SharePoint List by using REST Services. (_vti_bin/ListData.svc)
This approach worked fine for some days, until I get an error 400 with following error message:
"The etag value 1 specified in one of the request headers is not valid. Please make sure only one tag value is specified and is valid."
Hope anybody can help.
Many thanks in advance.


Answer 1

Hi,
According to your post, my understanding is that you had an issue about retrieve data form list using REST in SharePoint 2010.
I had created a simple demo to retrieve a list item, you can check with the following code snippets.
<script src="http://code.jquery.com/jquery-1.10.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
_spBodyOnLoadFunctionNames.push("callCSOM");
function callCSOM()
$("#Button1").click(function()
ExecuteOrDelayUntilScriptLoaded(ready, "sp.js");
function getListItemById(webUrl,listName, itemId, success, failure) {
var url = webUrl + "/_vti_bin/listdata.svc/" + listName + "(" + itemId + ")";
$.ajax({
url: url,
method: "GET",
headers: { "Accept": "application/json; odata=verbose" },
success: function (data) {
success(data.d);
error: function (data) {
failure(data.responseJSON.error);
function ready(){
getListItemById('http://sp','ListB',2,function(data){
alert(data.Title);
function(error){
console.log(JSON.stringify(error));
</script>
<input id="Button1" type="button" value="Run Code"/>
Thanks,
Jason
Forum Support
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