mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-07-01 10:59:46 +02:00
f960b3872a
Documented headers.lua Update copyright date everywhere Remove RCSID from files Move version back to 2.1 rather than 2.1.1 Fixed url package to support ipv6 hosts Changed "domain" to "family" in tcp and udp structures Implemented getfamily methods
112 lines
3.3 KiB
Lua
112 lines
3.3 KiB
Lua
-----------------------------------------------------------------------------
|
|
-- Little program that checks links in HTML files, using coroutines and
|
|
-- non-blocking I/O via the dispatcher module.
|
|
-- LuaSocket sample files
|
|
-- Author: Diego Nehab
|
|
-----------------------------------------------------------------------------
|
|
local url = require("socket.url")
|
|
local dispatch = require("dispatch")
|
|
local http = require("socket.http")
|
|
dispatch.TIMEOUT = 10
|
|
|
|
-- make sure the user knows how to invoke us
|
|
arg = arg or {}
|
|
if table.getn(arg) < 1 then
|
|
print("Usage:\n luasocket check-links.lua [-n] {<url>}")
|
|
exit()
|
|
end
|
|
|
|
-- '-n' means we are running in non-blocking mode
|
|
if arg[1] == "-n" then
|
|
-- if non-blocking I/O was requested, use real dispatcher interface
|
|
table.remove(arg, 1)
|
|
handler = dispatch.newhandler("coroutine")
|
|
else
|
|
-- if using blocking I/O, use fake dispatcher interface
|
|
handler = dispatch.newhandler("sequential")
|
|
end
|
|
|
|
local nthreads = 0
|
|
|
|
-- get the status of a URL using the dispatcher
|
|
function getstatus(link)
|
|
local parsed = url.parse(link, {scheme = "file"})
|
|
if parsed.scheme == "http" then
|
|
nthreads = nthreads + 1
|
|
handler:start(function()
|
|
local r, c, h, s = http.request{
|
|
method = "HEAD",
|
|
url = link,
|
|
create = handler.tcp
|
|
}
|
|
if r and c == 200 then io.write('\t', link, '\n')
|
|
else io.write('\t', link, ': ', tostring(c), '\n') end
|
|
nthreads = nthreads - 1
|
|
end)
|
|
end
|
|
end
|
|
|
|
function readfile(path)
|
|
path = url.unescape(path)
|
|
local file, error = io.open(path, "r")
|
|
if file then
|
|
local body = file:read("*a")
|
|
file:close()
|
|
return body
|
|
else return nil, error end
|
|
end
|
|
|
|
function load(u)
|
|
local parsed = url.parse(u, { scheme = "file" })
|
|
local body, headers, code, error
|
|
local base = u
|
|
if parsed.scheme == "http" then
|
|
body, code, headers = http.request(u)
|
|
if code == 200 then
|
|
-- if there was a redirect, update base to reflect it
|
|
base = headers.location or base
|
|
end
|
|
if not body then
|
|
error = code
|
|
end
|
|
elseif parsed.scheme == "file" then
|
|
body, error = readfile(parsed.path)
|
|
else error = string.format("unhandled scheme '%s'", parsed.scheme) end
|
|
return base, body, error
|
|
end
|
|
|
|
function getlinks(body, base)
|
|
-- get rid of comments
|
|
body = string.gsub(body, "%<%!%-%-.-%-%-%>", "")
|
|
local links = {}
|
|
-- extract links
|
|
body = string.gsub(body, '[Hh][Rr][Ee][Ff]%s*=%s*"([^"]*)"', function(href)
|
|
table.insert(links, url.absolute(base, href))
|
|
end)
|
|
body = string.gsub(body, "[Hh][Rr][Ee][Ff]%s*=%s*'([^']*)'", function(href)
|
|
table.insert(links, url.absolute(base, href))
|
|
end)
|
|
string.gsub(body, "[Hh][Rr][Ee][Ff]%s*=%s*(.-)>", function(href)
|
|
table.insert(links, url.absolute(base, href))
|
|
end)
|
|
return links
|
|
end
|
|
|
|
function checklinks(address)
|
|
local base, body, error = load(address)
|
|
if not body then print(error) return end
|
|
print("Checking ", base)
|
|
local links = getlinks(body, base)
|
|
for _, link in ipairs(links) do
|
|
getstatus(link)
|
|
end
|
|
end
|
|
|
|
for _, address in ipairs(arg) do
|
|
checklinks(url.absolute("file:", address))
|
|
end
|
|
|
|
while nthreads > 0 do
|
|
handler:step()
|
|
end
|