3 items tagged “jsonhead”
2017
Deploying an asynchronous Python microservice with Sanic and Zeit Now
Back in 2008 Natalie Downe and I deployed what today we would call a microservice: json-head, a tiny Google App Engine app that allowed you to make an HTTP head request against a URL and get back the HTTP headers as JSON. One of our initial use-scase for this was Natalie’s addSizes.js, an unobtrusive jQuery script that could annotate links to PDFs and other large files with their corresponding file size pulled from the Content-Length header. Another potential use-case is detecting broken links, since the API can be used to spot 404 status codes (as in this example).
2008
addSizes.js: Snazzy automatic link file-size generation. Posted to Nat’s snazzy new blog: a script that uses my json-head API to grab the file size of linked documents on a page and insert those sizes in to the document.
json-head. I’ve deployed another App Engine mini-app, which provides a JSON-P API for running HEAD requests against an arbitrary URL (useful for checking things like Content-Length and Content-Type headers and whether a URL returns 200). App Engine’s urlfetch limitations mean it can only deal with port 80 and 443 requests.