As a shameless plug, I cover multiple ways of doing this in my new book:
http://bit.ly/prag-js
Basically it boils down to this:
• If you can, leverage native support for CORS usually through specific
HTTP headers on the third-party service side.
• Otherwise you can fallback to a variety of options, depending on the
HTTP verb, nature of the response and payload weight you're looking
at. You could go with Flash-based fallback using crossdomain.xml,
JSON-P, YQL, an <iframe> with or without a response content (a 204
response is perfectly acceptable), or even CSSHttpRequest (which,
admittedly, is a major hack).
--
Christophe Porteneuve
[email protected]
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