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I recently got to participate in a psychological experiment for programmers. A friend of mine, Mike Hansen, is doing research on how people comprehend programs. The goal is to figure out some way of measuring what features in programming systems help programmers understand what they are doing, and how this can be used to make systems that lead to higher quality software. Mike is currently running
The Architecture of Open Source Applications (Volume 1) Graphite Chris Davis Graphite1 performs two pretty simple tasks: storing numbers that change over time and graphing them. There has been a lot of software written over the years to do these same tasks. What makes Graphite unique is that it provides this functionality as a network service that is both easy to use and highly scalable. The proto
tornado.websocket — Bidirectional communication to the browser¶ Server-side implementation of the WebSocket protocol. WebSockets allow for bidirectional communication between the browser and server. Warning The WebSocket protocol is still in development. This module currently implements the “draft76” version of the protocol, which is supported only by Chrome and Safari. See this browser compatibil
Internet Engineering Task Force (IETF) I. Fette Request for Comments: 6455 Google, Inc. Category: Standards Track A. Melnikov ISSN: 2070-1721 Isode Ltd. December 2011 The WebSocket Protocol Abstract The WebSocket Protocol enables two-way communication between a client running untrusted code in a controlled environment to a remote host that has opted-in to communications from that code. The securit
HTTP Guides Resources and URIs Identifying resources on the Web Data URLs Introduction to MIME types Common MIME types Choosing between www and non-www URLs HTTP guide Basics of HTTP Overview of HTTP Evolution of HTTP HTTP Messages A typical HTTP session Connection management in HTTP/1.x Protocol upgrade mechanism HTTP security Content Security Policy (CSP) HTTP Strict Transport Security (HSTS) X-
Cross-origin resource sharing (CORS) is a mechanism that allows a web page to access restricted resources from a server on a domain different than the domain that served the web page. A web page may freely embed cross-origin images, stylesheets, scripts, iframes, and videos. Certain "cross-domain" requests, notably Ajax requests, are forbidden by default by the same-origin security policy. CORS de
Stay organized with collections Save and categorize content based on your preferences. Explore our growing collection of courses on key web design and development subjects. An industry expert has written each course, helped by members of the Chrome team. Follow the modules sequentially, or dip into the topics you most want to learn about.
Bucky¶ Bucky is a small service implemented in Python for collecting and translating metrics for Graphite. It can current collect metric data from CollectD daemons and from StatsD clients. collectd¶ collectd is a daemon which collects system performance statistics periodically and provides mechanisms to store the values in a variety of ways, including RRD. To send collectd metrics into carbon/grap
The Architecture of Open Source Applications (Volume 1) Riak and Erlang/OTP Francesco Cesarini, Andy Gross, and Justin Sheehy Riak is a distributed, fault tolerant, open source database that illustrates how to build large scale systems using Erlang/OTP. Thanks in large part to Erlang's support for massively scalable distributed systems, Riak offers features that are uncommon in databases, such as
Rackspace support and API documentation for all our services.
Every entity represented in Twitter's API has an ID associated with it. As we allocate larger and larger numbers for these IDs, the space required to store them must grow in turn. For example, we migrated Tweet IDs from 32-bit to 64-bit integers back in 2009, then did the same for direct message IDs in 2011. We expect to start allocating user IDs in a 64-bit integer space sometime this year. This
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