Incident report on memory leak caused by Cloudflare parser bug2017-02-23 Last Friday, Tavis Ormandy from Google’s Project Zero contacted Cloudflare to report a security problem with our edge servers. He was seeing corrupted web pages being returned by some HTTP requests run through Cloudflare. It turned out that in some unusual circumstances, which I’ll detail below, our edge servers were running
What is ANTLR? ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Terence Parr is a tech lead at Google and until 2022 was a professor of data science /
parboiled2 is a Scala 2.12+ library enabling lightweight and easy-to-use, yet powerful, fast and elegant parsing of arbitrary input text. It implements a macro-based parser generator for Parsing Expression Grammars (PEGs), which runs at compile time and translates a grammar rule definition (written in an internal Scala DSL) into corresponding JVM bytecode. PEGs are an alternative to Context-Free G
trait SampleParsers extends RegexParsers { /** 文字列に".i"を付けると大文字小文字を区別せずマッチさせるようにする拡張 */ implicit class IgnoreCaseString(s: String) { def i: Parser[String] = ("""(?i)\Q""" + s + """\E""").r } def keyword: Parser[String] = "keyword:".i def value: Parser[String] = "[a-zA-Z0-9]+".r def parameter: Parser[(String,String)] = keyword ~ value ^^ { case k~v => (k,v) } }
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