qucik cocos2d lua http 登陆下载图片以及下载文件后的解压缩

MainScene.lua 

local NetSprite=require("app.scenes.NetSprite")
require("app.ImageManager")
local zip=require("zlib")
local uncompress=zip.inflate()
local url ="https://codeload.github.com/diegonehab/luasocket/zip/master"

local MainScene = class("MainScene", function()
return display.newScene("MainScene")
end)

local pathToSave = device.writablePath.."res/" -- 保存路径
local assetsManager = nil -- 资源管理器对象

function MainScene:ctor()
if nil == assetsManager then
-- 创建一个资源管理器，第一个参数是zip包下载地址，第二个参数是版本文件，第三个参数是保存路径
assetsManager = cc.AssetsManager:new("https://raw.github.com/samuele3hu/AssetsManagerTest/master/package.zip",
"https://raw.github.com/samuele3hu/AssetsManagerTest/master/version",
pathToSave)
-- 保留所有权，该方法会增加Ref对象的引用计数
assetsManager:retain()
-- 设置一系列委托
assetsManager:setDelegate(function(event) self:onError(event) end,cc.ASSETSMANAGER_PROTOCOL_ERROR )
assetsManager:setDelegate(function(event) self:onProgress(event) end,cc.ASSETSMANAGER_PROTOCOL_PROGRESS)
assetsManager:setDelegate(function(event) self:onSuccess(event) end,cc.ASSETSMANAGER_PROTOCOL_SUCCESS )
assetsManager:setConnectionTimeout(3)-- 设置连接超时
assetsManager:update()
end

---下载图片并放入到压缩文件中
--local request1 = network.createHTTPRequest(function(event) self:callback1(event) end, url, "GET")
--request1:start()

---登陆
-- local request = network.createHTTPRequest(function(event) self:requestCallBack(event) end,url, "POST")
-- request:addPOSTValue("device","1") -- 添加post中的传递参数 key 和value
-- request:addPOSTValue("mobileType","MI NOTE LTE")
-- request:addPOSTValue("machineCode","ffffffff-d25d-d35f-6ff0-f7c4728dd8ab")
-- request:start()

--图片下载的初始化
--ImageCacheManager:init()
end

-- 进度更新回调
function MainScene:onProgress( percent )
-- 显示下载进度
local progress = string.format("downloading %d%%",percent)
print(progress)
end

-- 下载成功方法回调
function MainScene:onSuccess()
print("downloading ok")
end

-- 下载错误回调
function MainScene:onError(errorCode)
-- 没有新版本
if errorCode == cc.ASSETSMANAGER_NO_NEW_VERSION then
print("no new version")
elseif errorCode == cc.ASSETSMANAGER_NETWORK then
-- 网络错误
print("network error")
end
end

function MainScene:onEnter()
---下载图片
-- ImageCacheManager:downloadImage(url,
-- function(event) self:onRequestFinished(event) end )

end

function MainScene:onExit()

end

function MainScene:onRequestFinished(params)
--显示图片
-- ImageCacheManager:newCacheSprite(url,display.cx,display.cy)
-- :addTo(self):align(display.CENTER,display.cx,display.cy)
end

function MainScene:requestCallBack(event)
---登陆返回
local ok = (event.name == "completed")
local request = event.request

if not ok then
-- 请求失败，显示错误代码和错误消息
print(request:getErrorCode(), request:getErrorMessage())
return
end

local code = request:getResponseStatusCode()
if code ~= 200 then
-- 请求结束，但没有返回 200 响应代码
print(code)
return
end

-- 请求成功，显示服务端返回的内容
local response = request:getResponseString()
print(response)
local t=json.decode(response)
print(t.data.signature)

end

function MainScene:callback1(event)
--下载图片并压缩返回
local request = event.request
print(event.name)
if event.name == "completed" then
if request:getResponseStatusCode() ~= 200 then
return
else
print(100)
request:saveResponseData("res/a.zip")
end
elseif event.name == "progress" then
print(event.total)
print(event.dltotal)
print(math.ceil(event.dltotal*100/event.total))
else
printf("getErrorCode() = %d, getErrorMessage() = %s", request:getErrorCode(), request:getErrorMessage())
return
end

end

return MainScene



ImageManager.lua
--[[
2 下载图片的缓存管理器
4 ]]
require "lfs"
ImageCacheManager = {}

local gameState = require(cc.PACKAGE_NAME .. ".cc.utils.GameState")

-- 图片缓存信息表，包括下载图片URL对应的md5值和最后更新时间
local cacheData = {}
-- 初始化GameState，存储缓存图片相关信息
function ImageCacheManager:init()
gameState.init(function(param)
-- local returnValue = nil
if param.errorCode then
print("error")
else
if param.name == "save" then

elseif param.name == "load" then

end
end
return param.values
end, "image_cache.txt", nil)
if io.exists(gameState.getGameStatePath()) then
cacheData = gameState.load()
end
end

--[[
根据图片的md5值判断是否存在在缓存表中
@param 图片的md5值
@return 存在：true以及所在的位置，不存在：false
]]
function ImageCacheManager:exist(md5)
for i = 1, #cacheData do
if cacheData[i].md5 == md5 then
return true, i
end
end
return false
end

--[[
修改图片在缓存表中的最后更新时间
@param md5:图片的md5值, position:图片在缓存表中的位置
]]
function ImageCacheManager:updateCacheTime(md5, position)
if cacheData[position].md5 == md5 then
table.remove(cacheData, position)
self:insertCacheData(md5)
-- dump(cacheData, "update")
else
print("ImageCacheManager updateCacheTime ERROR!")
end
end

--[[
根据缓存目录里的图片来创建精灵
@param url 缓存图片的URL地址
x:精灵横向坐标值，y:精灵纵向坐标值
@return 若缓存表中存在对应的md5值，返回创建的精灵对象
]]
function ImageCacheManager:newCacheSprite(url, x, y)
local md5 = crypto.md5(url, false)
local isExist, position = self:exist(md5)
if isExist then
self:updateCacheTime(md5, position)
local filename = device.writablePath .. "cache/" ..md5 .. ".png"
return display.newSprite(filename, x, y)
end
end

--[[
向图片缓存表中插入数据
@param 图片的md5值
]]
function ImageCacheManager:insertCacheData(md5)
local data = {}
data.time = os.time()
data.md5 = md5
if table.nums(cacheData) > 100 then
-- 超过缓存上限，清除第一个元素（通常最久未更新时间戳）
table.remove(cacheData, 1)
end
table.insert(cacheData, data)
gameState.save(cacheData)
end

--[[
下载缓存图片
@param url 下载图片的URL地址
callback 调用下载处的回调函数地址
]]
function ImageCacheManager:downloadImage(url, callback)
local md5 = crypto.md5(url, false)
if not self:exist(md5) then
local request = network.createHTTPRequest(function (event)
local ok = (event.name == "completed")
local request = event.request
if not ok then
print(request:getErrorCode(), request:getErrorMessage())
return
end
local code = request:getResponseStatusCode()
if code ~= 200 then
-- 请求结束，但没有返回 200 响应代码
print(code)
return
end
local filename = md5 .. ".png"
self.path = device.writablePath.."cache/" --获取本地存储目录
if not io.exists(self.path) then
lfs.mkdir(self.path) --目录不存在，创建此目录
end
request:saveResponseData(device.writablePath .. "cache/" .. filename)
local item = {}
item.time = os.time()
item.md5 = md5
table.insert(cacheData, item)
gameState.save(cacheData)
if callback then callback(url) end
end, url, "GET")
request:start()
else
if callback then callback(url) end
print("The %s has downloaded.", url)
end
end

--[[
根据需要删除缓存图片，释放存储空间
]]
function ImageCacheManager:gcCache()
for i = #cacheData, 1, -1 do
local recordTime = cacheData[i].time
local currentTime = os.time()
if currentTime - recordTime > 7*24*3600 then
local cmd
if (device.platform == "windows") then
cmd = "DEL /Q " .. device.writablePath .. "cache\\" .. cacheData[i].md5 .. ".png"
else
cmd = "rm -r " .. device.writablePath .. "cache/" .. cacheData[i].md5 .. ".png"
end
os.execute(cmd)
table.remove(cacheData, i)
end
end
gameState.save(cacheData)
end