lua 获得google天气通过google的天气api - 星空™'s Blog - 新blog地址 http://leemeng0x61.github.io/

lua 获得google天气通过google的天气api

星空™ posted @ Mar 24, 2011 12:13:52 AM in CODE with tags lua google api , 2688 阅读

    昨天写了一个lua的天气脚本,主要是获取http://qq.ip138.com天气信息,基本功能都已实现,但是唯一不足之处,就是不能显示当前的天气及气温。所以今天在网上找了下这方面的资料,发现google天气API获得满足了这个需求,于是就有折腾了下。google API特点:当天气和气温是实时的,明后几天是温度区间。

    上代码先

 

#!/usr/bin/lua5.1
local http = require("socket.http")
------------------------regex-------------------------
function get_weather(con)
	local s = "<current_conditions>.*<\/forecast_conditions>"
	local i ,j = string.sub(con, string.find(con,s)) 
	local s = "\"[a-z0-9A-Z%s:%%]*\""  
	local info
	for word in string.gmatch(i, s) do 
			info = tostring(info).."\t"..tostring(word)  
	end
	local i, j = string.gsub(info, "\"","")
	local l = split(i,"\t")
	return l
end

------------------------split-------------------------
function split(string, spt)
	local find_index = 1
	local spt_index = 1
	local spt_arr = {}
	while true do
		local find_end = string.find(string, spt, find_index)
		if not find_end then
			spt_arr[spt_index] = string.sub(string, find_index, string.len(string))
			break
		end
		spt_arr[spt_index] = string.sub(string, find_index, find_end - 1)
		find_index = find_end + string.len(spt)
		spt_index = spt_index + 1
	end
	return spt_arr
end

------------------------main-------------------------
function main()
	local url = "http://www.google.com/ig/api?weather=chengdu"
	local con, ret = http.request(url)
	if con == nil then
		print ("nil")
	else
		local l = 	get_weather(con)
		print(l[2],l[3],l[4],l[5],l[6])
	end
end

main()

l数组中包含了最近几天的天气信息,没有像昨天的那个脚本那样进行分类,这是一个遗憾,不过下标的位置是固定的,这也方便了取值!

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