Executing a search and obtaining XML data from an external source

Currently, I am faced with the challenge of using Ajax to submit a query to an external database located at http://foreignserver:1234/database?query="SELECT FROM WHERE". The goal is to execute the query, generate an XML file, and have it returned to me. This external server is powered by Apache Tomcat. Despite researching cross-site scripting, I have encountered some roadblocks:

-Implementing CORS is not feasible as support for IE7 is required, and configuring it in Tomcat appears overly complex.

-Unfortunately, easyXDM is off the table as well.

-My preference is to work with XML, and JSONP seems to be associated with JSON rather than XML.

-Considering the substantial amount of data expected back, iFrames do not seem like a viable solution.

What steps should be taken next?

javascriptxmlajaxxss

Answer №1

  • When working with a large amount of data, JSONP is recommended over XML due to its lightweight syntax and ability to bypass the Same Origin Policy (SOP) with client-side processing. This approach allows the server to encode data in JSON format, providing efficient data transfer. However, using JSON instead of XML is required.

  • If XML must be used, the server can act as a proxy to fetch remote pages for assistance. By having the browser request the page from the server on the same domain, the server can then read the remote page and return it back to the browser. This proxy setup effectively bypasses SOP restrictions.

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