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This week, I’m in Tokyo to attend SoftBank World 2015. Today I had the honor of sharing the stage with Ken Miyauchi, President & CEO of SoftBank Corp., to make a few announcements about Fastly’s expanding presence in Japan.


O'Reilly’s Open Source Convention (OSCON) is always exciting. It’s easy to feel the collaborative, open source spirit throughout the conference and the events surrounding it. This year, our team traveled to Portland, Oregon to talk shop about all things web performance.



Before diving into CORS (Cross-origin resource sharing), I need to mention JSONP, which is the other solution to getting data from a different “Origin.” In Using ESI, Part 2: Leveraging VCL and ESI to Use JSONP, Simon explains what JSONP is, and how to cache it with Fastly, using one Fastly specific feature, req.topurl. Now, with Varnish 4.1, req.top.url (note the extra period) is available, and it allows you to do the same thing with vanilla Varnish.





