Attachment File using REST was failed to upload with the problem of SP.RequestExecutor.js

Question

How can I add attachment in SharePoint I am stuck on this problem hopefully can help me to proceed this problem. I will so much appreciate your help. Thank you.

Answer 1

You have used SP.RequestExecutor which is used for making cross domain calls and if so your _spPageContextInfo.webServerRelativeUrl won't work. Either you need to use query string to get the url or try using hard code url value. For getting url from query string

hostweburl =
            decodeURIComponent(
                getQueryStringParameter("SPHostUrl")
        );
appweburl =
           decodeURIComponent(
                getQueryStringParameter("SPAppWebUrl")
        );

var scriptbase = hostweburl + "/_layouts/15/";

For reference Click here

Answer 2

With regards to the error your encountering , I believe you want to change your call to _spPageContextInfo.webServerRelativeUrl to _spPageContextInfo.siteAbsoluteUrl

The following article provides a good breakdown on the properties available on _spPageContextInfo

https://sympmarc.com/2013/03/26/using-_sppagecontextinfo-to-determine-the-current-sharepoint-context-in-script/