Cross-Domain Data Posting for Large Data: JSONP Limitations and Workarounds
When dealing with data transfer across different domains, limitations arise due to browser security restrictions. One of these restrictions is the inability to perform asynchronous POST requests to domains that do not match the origin of the requesting page. This presents a challenge when attempting to send large amounts of data that exceed the size limits of GET requests.
JSONP Versus POST
JSONP (JSON with Padding) is a technique used for cross-domain communication that utilizes JSON data wrapped in a callback function. While JSONP allows for asynchronous data retrieval, it does not support POST requests. All requests through JSONP are executed via GET and data is passed within the query string.
Options for Cross-Domain Data Posting
Given the limitations of JSONP, alternative approaches are necessary for posting large data across domains. One option is to use a regular form POST by setting the action of a form to a page on a different domain. This allows for traditional HTTP POST requests, which include data within the body of the request.
Additional Workarounds
For more complex scenarios, there are experimental techniques that involve manipulating hidden
