最近比较想看loli的时间，但是在线看太慢了，每一页都要等半天，就想找个地方下载下来看 xunlei的漫画下载是有规律可循的，下载起来相对容易一些。写了几个正则来处理，但是后来每篇就10几页，太麻烦了，就写了个程序来处理，就当ruby的练手程序了 代码共享给大家，欢迎指正，呵呵

require 'net/http'
require 'fileutils'
require 'uri'
require 'stringio'

$url_base = "/origin/"
$hostname = "images.mh.xunlei.com"
$save_dir_regex = /萝莉的时间 - 第(\d+)话 - 漫画在线/
$save_dir = ""
$images_arr_regex = /images_arr\[(\d{1,2})\] = \'(\S+\.jpg)\';/

def processFile(body)
    ip = StringIO.new(body)
    ip.each_line do |line|
        if line =~ $save_dir_regex   
            $save_dir = $1
            FileUtils.mkdir($save_dir) unless File.exist?($save_dir)
        end
        #puts line if line =~ images_arr_regex
        if line =~ $images_arr_regex and $save_dir != ""
            puts "downloading http://" + $hostname + $url_base + $2 
            puts "saving as " + $save_dir + "/" + expendFilename($1) + ".jpg"
            downloadAndSavePics($hostname, $url_base + $2, $save_dir + "/" + expendFilename($1) + ".jpg")
        end
    end
end

def expendFilename(filename)
    '0' * (4 - filename.length) + filename
end

def downloadAndSavePics(hostname, relativePath, destFilename)
    Net::HTTP.start(hostname){ |http|
        response = http.get(relativePath)
        if (response.message == "OK")
            open(destFilename, "wb") { |file|
                file.write(response.body)
            }
        end
    }
end
#processFile('6309.html')
def batchProcessAllUrls(filename)
    File.open(filename, 'r') { |file|
        while line = file.gets
            puts line
            url = URI.parse(line)
            puts "" + url.host + url.path
            Net::HTTP.start(url.host) {|http|
                response = http.get(url.path)
                if response.message == "OK"
                    processFile(response.body)
                end
            }
        end
    }
end

batchProcessAllUrls("index_urls")