Updated some of the callbacks in callback.lua.

Update get.lua to use the new callbacks.
The old "code" module is now the "mime" module.
Updated all modules that depended on it.
Updated url.lua to use the new namespace scheme, and moved the
    escape and unescape functions that used to be in the code.lua module
    to it, since these are specific to urls.
Updated the callback entries in the manual.

1 files changed, 110 insertions, 69 deletions

diff --git a/src/url.lua b/src/url.lua
index 27e7928..ab3a922 100644
--- a/src/url.lua
+++ b/src/url.lua
@@ -6,9 +6,102 @@
 -- RCS ID: $Id$
 ----------------------------------------------------------------------------
 
-local Public, Private = {}, {}
-local socket = _G[LUASOCKET_LIBNAME] -- get LuaSocket namespace
-socket.url = Public
+-- make sure LuaSocket is loaded
+if not LUASOCKET_LIBNAME then error('module requires LuaSocket') end
+-- get LuaSocket namespace
+local socket = _G[LUASOCKET_LIBNAME]
+if not socket then error('module requires LuaSocket') end
+-- create smtp namespace inside LuaSocket namespace
+local url = {}
+socket.url = url
+-- make all module globals fall into smtp namespace
+setmetatable(url, { __index = _G })
+setfenv(1, url)
+
+-----------------------------------------------------------------------------
+-- Encodes a string into its escaped hexadecimal representation
+-- Input 
+--   s: binary string to be encoded
+-- Returns
+--   escaped representation of string binary
+-----------------------------------------------------------------------------
+function escape(s)
+    return string.gsub(s, "(.)", function(c)
+        return string.format("%%%02x", string.byte(c))
+    end)
+end
+
+-----------------------------------------------------------------------------
+-- Protects a path segment, to prevent it from interfering with the
+-- url parsing. 
+-- Input 
+--   s: binary string to be encoded
+-- Returns
+--   escaped representation of string binary
+-----------------------------------------------------------------------------
+local function make_set(t)
+        local s = {}
+        for i = 1, table.getn(t) do
+                s[t[i]] = 1
+        end
+        return s
+end
+
+-- these are allowed withing a path segment, along with alphanum
+-- other characters must be escaped
+local segment_set = make_set {
+    "-", "_", ".", "!", "~", "*", "'", "(", 
+        ")", ":", "@", "&", "=", "+", "$", ",",
+}
+
+local function protect_segment(s)
+        return string.gsub(s, "(%W)", function (c) 
+                if segment_set[c] then return c
+                else return escape(c) end
+        end)
+end
+
+-----------------------------------------------------------------------------
+-- Encodes a string into its escaped hexadecimal representation
+-- Input 
+--   s: binary string to be encoded
+-- Returns
+--   escaped representation of string binary
+-----------------------------------------------------------------------------
+function unescape(s)
+    return string.gsub(s, "%%(%x%x)", function(hex)
+        return string.char(tonumber(hex, 16))
+    end)
+end
+
+-----------------------------------------------------------------------------
+-- Builds a path from a base path and a relative path
+-- Input
+--   base_path
+--   relative_path
+-- Returns
+--   corresponding absolute path
+-----------------------------------------------------------------------------
+local function absolute_path(base_path, relative_path)
+    if string.sub(relative_path, 1, 1) == "/" then return relative_path end
+    local path = string.gsub(base_path, "[^/]*$", "")
+    path = path .. relative_path
+    path = string.gsub(path, "([^/]*%./)", function (s) 
+        if s ~= "./" then return s else return "" end
+    end)
+    path = string.gsub(path, "/%.$", "/")
+    local reduced 
+    while reduced ~= path do
+        reduced = path
+        path = string.gsub(reduced, "([^/]*/%.%./)", function (s)
+            if s ~= "../../" then return "" else return s end
+        end)
+    end
+    path = string.gsub(reduced, "([^/]*/%.%.)$", function (s)
+        if s ~= "../.." then return "" else return s end
+    end)
+    return path
+end
 
 -----------------------------------------------------------------------------
 -- Parses a url and returns a table with all its parts according to RFC 2396
@@ -28,7 +121,7 @@ socket.url = Public
 -- Obs:
 --   the leading '/' in {/<path>} is considered part of <path>
 -----------------------------------------------------------------------------
-function Public.parse(url, default)
+function parse(url, default)
     -- initialize default parameters
     local parsed = default or {}
     -- empty url is parsed to nil
@@ -66,11 +159,11 @@ end
 -- Rebuilds a parsed URL from its components.
 -- Components are protected if any reserved or unallowed characters are found
 -- Input
---   parsed: parsed URL, as returned by Public.parse
+--   parsed: parsed URL, as returned by parse
 -- Returns
 --   a stringing with the corresponding URL
 -----------------------------------------------------------------------------
-function Public.build(parsed)
+function build(parsed)
     local url = parsed.path or ""
     if parsed.params then url = url .. ";" .. parsed.params end
     if parsed.query then url = url .. "?" .. parsed.query end
@@ -102,9 +195,9 @@ end
 -- Returns
 --   corresponding absolute url
 -----------------------------------------------------------------------------
-function Public.absolute(base_url, relative_url)
-    local base = Public.parse(base_url)
-    local relative = Public.parse(relative_url)
+function absolute(base_url, relative_url)
+    local base = parse(base_url)
+    local relative = parse(relative_url)
     if not base then return relative_url
     elseif not relative then return base_url
     elseif relative.scheme then return relative_url
@@ -121,10 +214,10 @@ function Public.absolute(base_url, relative_url)
                     end
                 end
             else     
-                relative.path = Private.absolute_path(base.path,relative.path)
+                relative.path = absolute_path(base.path,relative.path)
             end
         end
-        return Public.build(relative)
+        return build(relative)
     end
 end
 
@@ -135,13 +228,13 @@ end
 -- Returns
 --   segment: a table with one entry per segment
 -----------------------------------------------------------------------------
-function Public.parse_path(path)
+function parse_path(path)
         local parsed = {}
         path = path or ""
         path = string.gsub(path, "%s", "")
         string.gsub(path, "([^/]+)", function (s) table.insert(parsed, s) end)
         for i = 1, table.getn(parsed) do
-                parsed[i] = socket.code.unescape(parsed[i])
+                parsed[i] = unescape(parsed[i])
         end
         if string.sub(path, 1, 1) == "/" then parsed.is_absolute = 1 end
         if string.sub(path, -1, -1) == "/" then parsed.is_directory = 1 end
@@ -154,9 +247,9 @@ end
 --   parsed: path segments
 --   unsafe: if true, segments are not protected before path is built
 -- Returns
---   path: correspondin path stringing
+--   path: corresponding path stringing
 -----------------------------------------------------------------------------
-function Public.build_path(parsed, unsafe)
+function build_path(parsed, unsafe)
         local path = ""
         local n = table.getn(parsed)
         if unsafe then
@@ -170,66 +263,14 @@ function Public.build_path(parsed, unsafe)
                 end
         else
                 for i = 1, n-1 do
-                        path = path .. Private.protect_segment(parsed[i])
+                        path = path .. protect_segment(parsed[i])
                         path = path .. "/"
                 end
                 if n > 0 then
-                        path = path .. Private.protect_segment(parsed[n])
+                        path = path .. protect_segment(parsed[n])
                         if parsed.is_directory then path = path .. "/" end
                 end
         end
         if parsed.is_absolute then path = "/" .. path end
         return path
 end
-
-function Private.make_set(t)
-        local s = {}
-        for i = 1, table.getn(t) do
-                s[t[i]] = 1
-        end
-        return s
-end
-
--- these are allowed withing a path segment, along with alphanum
--- other characters must be escaped
-Private.segment_set = Private.make_set {
-    "-", "_", ".", "!", "~", "*", "'", "(", 
-        ")", ":", "@", "&", "=", "+", "$", ",",
-}
-
-function Private.protect_segment(s)
-        local segment_set = Private.segment_set
-        return string.gsub(s, "(%W)", function (c) 
-                if segment_set[c] then return c
-                else return socket.code.escape(c) end
-        end)
-end
-
------------------------------------------------------------------------------
--- Builds a path from a base path and a relative path
--- Input
---   base_path
---   relative_path
--- Returns
---   corresponding absolute path
------------------------------------------------------------------------------
-function Private.absolute_path(base_path, relative_path)
-    if string.sub(relative_path, 1, 1) == "/" then return relative_path end
-    local path = string.gsub(base_path, "[^/]*$", "")
-    path = path .. relative_path
-    path = string.gsub(path, "([^/]*%./)", function (s) 
-        if s ~= "./" then return s else return "" end
-    end)
-    path = string.gsub(path, "/%.$", "/")
-    local reduced 
-    while reduced ~= path do
-        reduced = path
-        path = string.gsub(reduced, "([^/]*/%.%./)", function (s)
-            if s ~= "../../" then return "" else return s end
-        end)
-    end
-    path = string.gsub(reduced, "([^/]*/%.%.)$", function (s)
-        if s ~= "../.." then return "" else return s end
-    end)
-    return path
-end