add lua version

Qcloud_CDN_API/lua/README.md

@@ -0,0 +1,40 @@
+## description
+
+This is the **Lua** version of the open api demo, which implements the *refresh_cdn_url* api based on **OpenResty**.
+
+## third-part package
+
+```bash
+opm get ledgetech/lua-resty-http
+opm get jkeys089/lua-resty-hmac
+```
+
+## usage
+
+Add and modify your code
+
+```lua
+# nginx.conf:
+
+location = /refresh_cdn_url {
+    content_by_lua_file conf/lua/refresh_cdn_url.lua;
+}
+
+- refresh_cdn_url:
+local qcloud_secret_id = ''     -- pls use your secret id
+local qcloud_secret_key = ''    -- pls use your secret key
+```
+
+post demo
+
+```json
+# POST ****/refresh_cdn_url
+
+{
+    "urls": [
+        "https://xxxx/index.html"
+         "https://xxxx/yyyy.png",
+    ]
+}
+```
+

Qcloud_CDN_API/lua/refresh_cdn_url.lua

@@ -0,0 +1,140 @@
+local ngx   = require 'ngx'
+local cjson = require 'cjson.safe'
+local hmac  = require "resty.hmac"
+local http  = require 'resty.http'
+
+local ok, new_tab = pcall(require, 'table.new')
+if not ok then
+    new_tab = function(narr, nreci) return {} end
+end
+
+local get_post_json = function()
+    if 'POST' ~= ngx.req.get_method() then
+        ngx.exit(406)
+    end
+
+    -- get post body
+    ngx.req.read_body()
+    local body = ngx.req.get_body_data()
+
+    if nil == body then
+        ngx.log(ngx.ERR, "body is null")
+        ngx.exit(406)
+    end
+
+    local data = cjson.decode(body)
+    if nil == data then
+        ngx.exit(406)
+    end
+
+    return data
+end
+
+local protocol = 'https://'
+local host = 'cdn.api.qcloud.com'
+local uri = '/v2/index.php'
+local action = 'RefreshCdnUrl'
+local method = 'POST'           -- can use GET or POST
+local qcloud_secret_id = ''     -- pls use your secret id
+local qcloud_secret_key = ''    -- pls use your secret key
+
+local params = {
+    ['Action'] = action,
+    ['SecretId'] = qcloud_secret_id,
+    ['Timestamp'] = ngx.time(),
+    ['Nonce'] = math.random(1000),
+}
+
+local urls = get_post_json()['urls']
+if 'table' ~= type(urls) then
+    ngx.exit(406)
+end
+
+for index, url in ipairs(urls) do
+    params['urls.' .. tostring(index - 1)] = url
+end
+
+-- 1. Sort parameters
+
+local keys = new_tab(#params, 0)
+local index = 1
+for k, _ in pairs(params) do
+    keys[index] = k
+    index = index + 1
+end
+
+table.sort(keys)
+
+-- 2. Concatenate request string
+
+local tmp = new_tab(#keys, 0)
+for i, k in ipairs(keys) do
+    tmp[i] = k .. "=" .. tostring(params[k])
+end
+
+local sig_params = table.concat(tmp, '&')
+
+-- 3. Concatenate the original signature string
+local sig_url = method .. host .. uri .. '?' .. sig_params
+
+-- 4. Generate signature string
+
+local hmac_sha1 = hmac:new(qcloud_secret_key, hmac.ALGOS.SHA1)
+if not hmac_sha1 then
+    ngx.log(ngx.ERR, 'failed to create the hmac_sha1 object')
+    ngx.exit(500)
+end
+
+ok = hmac_sha1:update(sig_url)
+if not ok then
+    ngx.log(ngx.ERR, 'failed to add data')
+    ngx.exit(500)
+end
+
+local mac = hmac_sha1:final()
+local base64 = ngx.encode_base64(mac) .. '='
+params['Signature'] = base64
+
+-- 5. Send http request
+
+local httpc = http:new()
+httpc:set_timeouts(30 * 1000, 30 * 1000, 30 * 1000)
+
+local request_url = protocol .. host .. uri
+local res, err
+if method == 'GET' then
+    res, err = httpc:request_uri(request_url, {
+        method = method,
+        query = params,
+    })
+else
+    res, err = httpc:request_uri(request_url, {
+        method = method,
+        body =  sig_params .. '&Signature=' .. base64,
+        headers = {
+            ["Content-Type"] = "application/x-www-form-urlencoded",
+        }
+    })
+end
+
+httpc:close()
+
+if not res then
+    ngx.log(ngx.ERR, 'refresh_cdn_url: request failed', err)
+    ngx.exit(500)
+end
+
+if 200 ~= res.status then
+    ngx.log(ngx.ERR, 'refresh_cdn_url: response header status code is not 200')
+    ngx.exit(500)
+end
+
+local res_body = cjson.decode(res.body)
+if not res_body['code'] or tonumber(res_body['code']) ~= 0 then
+    ngx.log(ngx.ERR, 'refresh_cdn_url: response body status code is not 0, body: ', res.body)
+    ngx.exit(500)
+end
+
+ngx.header['Content-Type'] = 'application/json'
+ngx.say(res.body)
+ngx.exit(200)

README.md

@@ -7,6 +7,7 @@
 * [php](https://github.com/QCloudCDN/CDN_API_SDK/tree/master/Qcloud_CDN_API/php)
 * [python](https://github.com/QCloudCDN/CDN_API_SDK/tree/master/Qcloud_CDN_API/python)
 * [java](https://github.com/QCloudCDN/CDN_API_SDK/tree/master/Qcloud_CDN_API/java/cdn_openapi_demo/src)
+* [lua](https://github.com/QCloudCDN/CDN_API_SDK/tree/master/Qcloud_CDN_API/lua)
 
 ## API 概览