IMHO a better approach would be adding the remote server’s directory as a locally mounted directory and use this as wp-content directory. Doing this on the block/filesystem level means that WordPress won’t notice a thing, since it appears to WordPress as normal local directory. You may want to have a look at sshfs in order … Read more
For cURL, a minimum of 1 second applies, as DNS resolution operates at second-resolution only. See more in wp-includes/class-request.php function request()
Check out Paul Clark’s Uploads by Proxy plugin: For local development: Automatically load images from the production version of wp-content/uploads if they are missing locally.
Is there any plugin I can use for this task? No. But there is a tool you can use. A colleague of mine was facing an identical situation. Multiple authors on one site wanted to cross post from the central, multi-author blog onto their own blogs. The solution was for them to use an external … Read more