Class: Tep::Url

Inherits:
Object
  • Object
show all
Defined in:
lib/tep/url.rb

Class Method Summary collapse

Class Method Details

.escape(s) ⇒ Object

Percent-encode the bytes that are unsafe in cookie values, query strings, and similar contexts. RFC 3986 unreserved set: ALPHA / DIGIT / ‘-._~`. Everything else gets `%XX` (uppercase hex).



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# File 'lib/tep/url.rb', line 35

def self.escape(s)
  out = ""
  i = 0
  while i < s.length
    c = s[i]
    if (c >= "a" && c <= "z") || (c >= "A" && c <= "Z") ||
       (c >= "0" && c <= "9") || c == "-" || c == "." ||
       c == "_" || c == "~"
      out = out + c
    else
      b = c.getbyte(0)
      hi = b / 16
      lo = b % 16
      out = out + "%" + Url.hex_char(hi) + Url.hex_char(lo)
    end
    i += 1
  end
  out
end

.hex_char(n) ⇒ Object 



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# File 'lib/tep/url.rb', line 55

def self.hex_char(n)
  if n < 10
    return ("0".getbyte(0) + n).chr
  end
  ("A".getbyte(0) + n - 10).chr
end

.hex_nibble(c) ⇒ Object 



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# File 'lib/tep/url.rb', line 62

def self.hex_nibble(c)
  if c >= "0" && c <= "9"
    return c.getbyte(0) - "0".getbyte(0)
  end
  if c >= "a" && c <= "f"
    return c.getbyte(0) - "a".getbyte(0) + 10
  end
  if c >= "A" && c <= "F"
    return c.getbyte(0) - "A".getbyte(0) + 10
  end
  -1
end

.parse_query(s) ⇒ Object

“a=1&b=2&c” -> Hash “a”=>“1”,“b”=>“2”,“c”=>“”



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# File 'lib/tep/url.rb', line 140

def self.parse_query(s)
  h = Tep.str_hash
  if s.length == 0
    return h
  end
  pairs = s.split("&")
  pairs.each do |pair|
    if pair.length > 0
      eq = Tep.str_find(pair, "=", 0)
      if eq < 0
        h[Url.unescape(pair)] = ""
      else
        k = pair[0, eq]
        v = pair[eq + 1, pair.length - eq - 1]
        h[Url.unescape(k)] = Url.unescape(v)
      end
    end
  end
  h
end

.split_url(u) ⇒ Object

Split a URL into a Hash with str=>str entries:

"scheme" "host" "port" "path" "query"

Recognises ‘host[:port]/path?query` and the same shape with `https://`. Without a scheme, the input is treated as a path (host stays empty); useful for routing relative paths through the same parser. Default ports follow the scheme: 80 for http, 443 for https. Path defaults to “/”. `query` is the raw substring after `?`, no further decoding.

Inlined as one method on purpose: spinel’s analyzer widens Hash-typed parameters when a helper mutates them and the caller then keeps reading; sticking to a single body keeps ‘out` narrowed to StrStrHash throughout.



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# File 'lib/tep/url.rb', line 89

def self.split_url(u)
  out = Tep.str_hash
  out["scheme"] = ""
  out["host"]   = ""
  out["port"]   = ""
  out["path"]   = "/"
  out["query"]  = ""

  rest = u
  if rest.length >= 7 && rest[0, 7] == "http://"
    out["scheme"] = "http"
    out["port"]   = "80"
    rest = rest[7, rest.length - 7]
  elsif rest.length >= 8 && rest[0, 8] == "https://"
    out["scheme"] = "https"
    out["port"]   = "443"
    rest = rest[8, rest.length - 8]
  end

  if out["scheme"].length > 0
    slash = Tep.str_find(rest, "/", 0)
    hostport = rest
    tail     = "/"
    if slash >= 0
      hostport = rest[0, slash]
      tail     = rest[slash, rest.length - slash]
    end
    colon = Tep.str_find(hostport, ":", 0)
    if colon >= 0
      out["host"] = hostport[0, colon]
      out["port"] = hostport[colon + 1, hostport.length - colon - 1]
    else
      out["host"] = hostport
    end
    rest = tail
  end

  qi = Tep.str_find(rest, "?", 0)
  if qi >= 0
    out["path"]  = rest[0, qi]
    out["query"] = rest[qi + 1, rest.length - qi - 1]
  else
    out["path"] = rest
  end
  if out["path"].length == 0
    out["path"] = "/"
  end
  out
end

.unescape(s) ⇒ Object

“%41+b” -> “A b”



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# File 'lib/tep/url.rb', line 5

def self.unescape(s)
  out = ""
  i = 0
  n = s.length
  while i < n
    c = s[i]
    if c == "+"
      out = out + " "
      i += 1
    elsif c == "%" && i + 2 < n
      hi = Url.hex_nibble(s[i + 1])
      lo = Url.hex_nibble(s[i + 2])
      if hi >= 0 && lo >= 0
        out = out + ((hi * 16 + lo).chr)
        i += 3
      else
        out = out + c
        i += 1
      end
    else
      out = out + c
      i += 1
    end
  end
  out
end