Get SharePoint data in Cross Domain using REST-API

Question

We have (02) SharePoint farm in different domain and they are connected.

We need to access data from Farm-A SharePoint List in Farm-B using Rest-API

usually we calling REST API by just URL as below when in same domain. But when domain is different what can we do?

https://mysharepoint.com/_api/web/lists/getbyTitle('Events')/items 
?$top=1 
&$select=Title,Description,Date 
&$filter=ID eq 12

Answer 1

For cross domain call, You can use SP.AppContextSite

Example:

appContextSite = new SP.AppContextSite(ctx, spHostUrl);

Nweb = appContextSite.get_web();
ctx.load(Nweb); 

REST:

Now your rest url will be like below,

var url = appwebUrl + "/_api/SP.AppContextSite(@target)/web/lists/getbyTitle('Events')/items?$top=1&$select=Title,Description,Date&$filter=ID eq 12&@target='" + hostwebUrl + "'";

For refer in details, you follow this link and this link

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