xitrum.scope.request.PathInfo.scala Maven / Gradle / Ivy

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package xitrum.scope.request

import java.nio.charset.Charset

import io.netty.handler.codec.http.QueryStringDecoder

class PathInfo(decoder: QueryStringDecoder, charset: Charset) {
  // After being decoded, the original paths /test1/123%2F456 and /test1/123/456 will be the same.
  // Treat "articles" and "articles/" the same.
  val decoded: String = removeSlashSuffix(decoder.path)

  val decodedWithIndexHtml: String = decoded + "/index.html"

  val encoded: String = {
    val uri  = decoder.uri
    val qPos = uri.indexOf("?")
    if (qPos >= 0) uri.substring(0, qPos) else uri
  }

  val tokens: Seq[String] = {
    // Need to split the original encoded URI (instead of decoder.path),
    // then decode the tokens (components),
    // otherwise /test1/123%2F456 will not match /test1/:p1
    val noSlashPrefix = removeSlashPrefix(encoded)

    // http://stackoverflow.com/questions/785586/how-can-split-a-string-which-contains-only-delimiter
    // "/echo//".split("/")     => Array("", "echo")
    // "/echo//".split("/", -1) => Array("", "echo", "", "")
    noSlashPrefix.split("/", -1).map(t => QueryStringDecoder.decodeComponent(t, charset))
  }

  private def removeSlashSuffix(path: String): String = {
    if (path.endsWith("/"))
      path.substring(0, path.length - 1)
    else
      path
  }

  private def removeSlashPrefix(path: String): String = {
    if (path.startsWith("/")) path.substring(1) else path
  }
}