---[[
-
-HTTP server implementation for LuCI - file handler
-(c) 2008 Steven Barth <steven@midlink.org>
-(c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
-$Id$
-
-]]--
-
-module("luci.httpd.handler.file", package.seeall)
-
-require("luci.httpd.module")
-require("luci.http.protocol.date")
-require("luci.http.protocol.mime")
-require("luci.http.protocol.conditionals")
-require("luci.fs")
-local ltn12 = require("luci.ltn12")
-
-Simple = luci.util.class(luci.httpd.module.Handler)
-Response = luci.httpd.module.Response
-
-function Simple.__init__(self, docroot, dirlist)
- luci.httpd.module.Handler.__init__(self)
- self.docroot = docroot
- self.dirlist = dirlist and true or false
- self.proto = luci.http.protocol
- self.mime = luci.http.protocol.mime
- self.date = luci.http.protocol.date
- self.cond = luci.http.protocol.conditionals
-end
-
-function Simple.getfile(self, uri)
- local file = self.docroot .. uri:gsub("%.%./+", "")
- local stat = luci.fs.stat(file)
-
- return file, stat
-end
-
-function Simple.handle_get(self, request, sourcein, sinkerr)
- local file, stat = self:getfile( self.proto.urldecode( request.env.PATH_INFO, true ) )
-
- if stat then
- if stat.type == "regular" then
-
- -- Generate Entity Tag
- local etag = self.cond.mk_etag( stat )
-
- -- Check conditionals
- local ok, code, hdrs
-
- ok, code, hdrs = self.cond.if_modified_since( request, stat )
- if ok then
- ok, code, hdrs = self.cond.if_match( request, stat )
- if ok then
- ok, code, hdrs = self.cond.if_unmodified_since( request, stat )
- if ok then
- ok, code, hdrs = self.cond.if_none_match( request, stat )
- if ok then
- local f, err = io.open(file)
-
- if f then
- -- Send Response
- return Response(
- 200, {
- ["Date"] = self.date.to_http( os.time() );
- ["Last-Modified"] = self.date.to_http( stat.mtime );
- ["Content-Type"] = self.mime.to_mime( file );
- ["Content-Length"] = stat.size;
- ["ETag"] = etag;
- }
- ), ltn12.source.file(f)
- else
- return self:failure( 403, err:gsub("^.+: ", "") )
- end
- else
- return Response( code, hdrs or { } )
- end
- else
- return Response( code, hdrs or { } )
- end
- else
- return Response( code, hdrs or { } )
- end
- else
- return Response( code, hdrs or { } )
- end
-
- elseif stat.type == "directory" then
-
- local ruri = request.request_uri:gsub("/$","")
- local duri = self.proto.urldecode( ruri, true )
- local root = self.docroot:gsub("/$","")
-
- -- check for index files
- local index_candidates = {
- "index.html", "index.htm", "default.html", "default.htm",
- "index.txt", "default.txt"
- }
-
- -- try to find an index file and redirect to it
- for i, candidate in ipairs( index_candidates ) do
- local istat = luci.fs.stat(
- root .. "/" .. duri .. "/" .. candidate
- )
-
- if istat ~= nil and istat.type == "regular" then
- return Response( 301, {
- ["Location"] = ruri .. "/" .. candidate
- } ), ltn12.source.empty()
- end
- end
-
-
- local html = string.format(
- '<?xml version="1.0" encoding="ISO-8859-15"?>\n' ..
- '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" ' ..
- '"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">\n' ..
- '<html xmlns="http://www.w3.org/1999/xhtml" ' ..
- 'xml:lang="en" lang="en">\n' ..
- '<head>\n' ..
- '<title>Index of %s/</title>\n' ..
- '<style type="text/css"><!--\n' ..
- 'body { background-color:#FFFFFF; color:#000000 } ' ..
- 'li { border-bottom:1px dotted #CCCCCC; padding:3px } ' ..
- 'small { font-size:60%%; color:#999999 } ' ..
- 'p { margin:0 }' ..
- '\n--></style></head><body><h1>Index of %s/</h1><hr /><ul>',
- duri, duri
- )
-
- local entries = luci.fs.dir( file )
-
- if type(entries) == "table" then
- for i, e in luci.util.spairs(
- entries, function(a,b)
- if entries[a] == '..' then
- return true
- elseif entries[b] == '..' then
- return false
- else
- return ( entries[a] < entries[b] )
- end
- end
- ) do
- if e ~= '.' and ( e == '..' or e:sub(1,1) ~= '.' ) then
- local estat = luci.fs.stat( file .. "/" .. e )
-
- if estat.type == "directory" then
- html = html .. string.format(
- '<li><p><a href="%s/%s/">%s/</a> ' ..
- '<small>(directory)</small><br />' ..
- '<small>Changed: %s</small></li>',
- ruri, self.proto.urlencode( e ), e,
- self.date.to_http( estat.mtime )
- )
- else
- html = html .. string.format(
- '<li><p><a href="%s/%s">%s</a> ' ..
- '<small>(%s)</small><br />' ..
- '<small>Size: %i Bytes | ' ..
- 'Changed: %s</small></li>',
- ruri, self.proto.urlencode( e ), e,
- self.mime.to_mime( e ),
- estat.size, self.date.to_http( estat.mtime )
- )
- end
- end
- end
-
- html = html .. '</ul><hr /></body></html>'
-
- return Response(
- 200, {
- ["Date"] = self.date.to_http( os.time() );
- ["Content-Type"] = "text/html; charset=ISO-8859-15";
- }
- ), ltn12.source.string(html)
- else
- return self:failure(403, "Permission denied")
- end
- else
- return self:failure(403, "Unable to transmit " .. stat.type .. " " .. file)
- end
- else
- return self:failure(404, "No such file: " .. file)
- end
-end
-
-function Simple.handle_head(self, ...)
- local response, sourceout = self:handle_get(...)
- return response
-end
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