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微信公众平台开发(82) 天气预报 - 方倍工作室

时间:2017-05-09  阅读(




在这篇教程中,我们将介绍如何在微信公众平台上开发天气预报功能。我们将使用中国天气网的气象数据接口来获取天气信息。

这篇教程将介绍以下内容:

  1. 获取中国天气网的气象数据
  2. 在微信公众平台中回复天气

一、中国天气网

中国天气网提供了丰富的气象数据接口。下面我们介绍主要的几个:

国家根节点接口:


		

该接口以XML格式列出所有的省(自治区、直辖市)的中文名称(quName)和拼音名称(pyName)及省会城市的天气信息,其中广东的数据如下:

<city quName="广东" pyName="guangdong" cityname="广州" state1="2" state2="7" stateDetailed="阴转小雨" tem1="8" tem2="15" windState="微风"/>

该接口的主要功能是通过它获取省级节点的拼音名称。以广东为例:其pyName是“Guangdong”。

省级节点接口(以广东为例):


		

该接口以XML格式列出当前省下辖所有市的中文名称(quName)、拼音名称(pyName)、中心坐标、天气信息以及城市编码。其中深圳的数据如下所示:

<city cityX="409" cityY="257" cityname="深圳" centername="深圳" fontColor="FFFFFF" pyName="shenzhen" state1="1" state2="1" stateDetailed="多云" tem1="12" tem2="18" temNow="12" windState="微风" windDir="东北风" windPower="1级" humidity="74%" time="21:15" url="101280601"/>

在这个接口中主要获取城市名称及相应的城市编码。例如,深圳的城市编码为:101280601。可以编写程序将全国城市拓扑结构采集下来。也可以使用方倍工作室已经采集好的,点击这里下载

实时天气数据(以深圳为例):


		

该接口以JSON格式列出当前城市的实时天气状况。如下所示:

{ "weatherinfo": { "city": "深圳", "cityid": "101280601", "temp": "12", "WD": "东北风", "WS": "1级", "SD": "75%", "WSE": "1", "time": "21:20", "isRadar": "1", "Radar": "JC_RADAR_AZ9755_JB" }
}

实时天气数据参数说明下所示:

六日天气数据(以深圳为例):


		

该接口以JSON格式列出当前城市的六日天气状况。如下所示:

{ "weatherinfo": { "city": "深圳", "city_en": "shenzhen", "date_y": "2014年2月15日", "date": "", "week": "星期六", "fchh": "18", "cityid": "101280601", "temp1": "12℃~18℃", "temp2": "16℃~21℃", "temp3": "17℃~23℃", "temp4": "11℃~18℃", "temp5": "10℃~15℃", "temp6": "12℃~17℃", "tempF1": "℉~℉", "tempF2": "℉~℉", "tempF3": "℉~℉", "tempF4": "℉~℉", "tempF5": "50℉~59℉", "tempF6": "℉~℉", "weather1": "多云", "weather2": "", "weather3": "多云", "weather4": "中雨", "weather5": "多云", "weather6": "", "img1": "1", "img2": "99", "img3": "2", "img4": "99", "img5": "1", "img6": "99", "img7": "8", "img8": "99", "img9": "1", "img10": "99", "img11": "2", "img12": "99", "img_single": "1", "img_title1": "多云", "img_title2": "多云", "img_title3": "", "img_title4": "", "img_title5": "多云", "img_title6": "多云", "img_title7": "中雨", "img_title8": "中雨", "img_title9": "多云", "img_title10": "多云", "img_title11": "", "img_title12": "", "img_title_single": "多云", "wind1": "微风", "wind2": "微风", "wind3": "微风", "wind4": "东北风3-4级", "wind5": "微风", "wind6": "微风", "fx1": "微风", "fx2": "微风", "fl1": "小于3级", "fl2": "小于3级", "fl3": "小于3级", "fl4": "3-4级", "fl5": "小于3级", "fl6": "小于3级", "index": "较舒适", "index_d": "建议着薄外套、开衫牛仔衫裤等服装。年老体弱者应适当添加衣物,宜着夹克衫、薄毛衣等。", "index48": "较舒适", "index48_d": "建议着薄外套、开衫牛仔衫裤等服装。年老体弱者应适当添加衣物,宜着夹克衫、薄毛衣等。", "index_uv": "最弱", "index48_uv": "最弱", "index_xc": "适宜", "index_tr": "适宜", "index_co": "舒适", "st1": "19", "st2": "13", "st3": "23", "st4": "16", "st5": "24", "st6": "18", "index_cl": "适宜", "index_ls": "适宜", "index_ag": "不易发" }
}

未来六日天气数据主要参数说明如下表所示:

以上接口是我们做天气预报功能将使用到的接口。

二、微信公众平台开发

1. 需要将城市编码对照表导入到数据库中,以下是SAE导入后截图

2. 将城市名转为城市代码的方法,这将在用户发送城市名的时候调用

 1function fromNameToCode($name)  2{  3$mysql_host = SAE_MYSQL_HOST_M;  4$mysql_host_s = SAE_MYSQL_HOST_S;  5$mysql_port = SAE_MYSQL_PORT;  6$mysql_user = SAE_MYSQL_USER;  7$mysql_password = SAE_MYSQL_PASS;  8$mysql_database = SAE_MYSQL_DB;  910$mysql_table = "weather"; 11$mysql_state = "SELECT * FROM ".$mysql_table." WHERE `cityName` = '".$name."'"; 1213$con = mysql_connect($mysql_host.':'.$mysql_port, $mysql_user, $mysql_password, true); 14if (!$con){ 15die('Could not connect: ' . mysql_error()); 16 } 17mysql_query("SET NAMES 'UTF8'"); 18mysql_select_db($mysql_database, $con); 19$result = mysql_query($mysql_state); 20$cityCode = ""; 21while($row = mysql_fetch_array($result)) 22 { 23$cityCode = $row['cityCode']; 24break; 25 } 26mysql_close($con); 27return$cityCode; 28 }

3. 编写接口调用函数,用于向天气网发送cURL请求,获取数据

 1function httpRequest($url)  2{  3$ch = curl_init();  4 curl_setopt($ch, CURLOPT_URL, $url);  5 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);  6$output = curl_exec($ch);  7 curl_close($ch);  8if ($output === FALSE){  9return "cURL Error: ". curl_error($ch); 10 } 11return$output; 12 }

4. 编写获取天气数据的函数,这里获取实时天气和未来3日天气,并将返回结果封装成图文信息的数组

 1function getWeatherInfo($cityName)  2{  3$cityCode = fromNameToCode($cityName);  4 5if ($cityCode == "")  6 {  7return "错误的城市名或者此城市不在数据库中!";  8 }  910//获取实时天气11$url = "".$cityCode.".html"; 12$output = httpRequest($url); 13$weather = json_decode($output, true); 14$info = $weather['weatherinfo']; 1516$weatherArray = array(); 17$weatherArray[] = array("Title"=>$info['city']."天气预报", "Description"=>"", "PicUrl"=>"", "Url" =>""); 18if ((int)$cityCode < 101340000){ 19$result = "实况 温度:".$info['temp']."℃ 湿度:".$info['SD']." 风速:".$info['WD'].$info['WSE']."级"; 20$weatherArray[] = array("Title"=>str_replace("%", "﹪", $result), "Description"=>"", "PicUrl"=>"", "Url" =>""); 21 } 2223//获取六日天气24$url = "".$cityCode.".html"; 25$output = httpRequest($url); 26$weather = json_decode($output, true); 27$info = $weather['weatherinfo']; 2829if (!empty($info['index_d'])){ 30$weatherArray[] = array("Title" =>$info['index_d'], "Description" =>"", "PicUrl" =>"", "Url" =>""); 31 } 3233$weekArray = array("日","一","二","三","四","五","六"); 34$maxlength = 3; 35for ($i = 1; $i <= $maxlength; $i++) { 36$offset = strtotime("+".($i-1)." day"); 37$subTitle = date("m月d日",$offset)." 周".$weekArray[date('w',$offset)]." ".$info['temp'.$i]." ".$info['weather'.$i]." ".$info['wind'.$i]; 38$weatherArray[] = array("Title" =>$subTitle, "Description" =>"", "PicUrl" =>""."d".sprintf("%02u",$info['img'.(($i *2)-1)]).".jpg", "Url" =>""); 39 } 4041return$weatherArray; 42 }

5. 在微信公众平台接口函数中处理收到的文本消息时,文本将为城市名,直接调用获取天气的函数

 1/* 2 方倍工作室  3 CopyRight 2013 All Rights Reserved  4*/ 5 6define("TOKEN", "weixin");  7 8$wechatObj = new wechatCallbackapiTest();  9if (!isset($_GET['echostr'])) {  10$wechatObj->responseMsg();  11 }else{  12$wechatObj->valid();  13}  14 15class wechatCallbackapiTest  16{  17publicfunction valid()  18 {  19$echoStr = $_GET["echostr"];  20if($this->checkSignature()){  21echo$echoStr;  22exit;  23 }  24 }  25 26privatefunction checkSignature()  27 {  28$signature = $_GET["signature"];  29$timestamp = $_GET["timestamp"];  30$nonce = $_GET["nonce"];  31$token = TOKEN;  32$tmpArr = array($token, $timestamp, $nonce);  33sort($tmpArr);  34$tmpStr = implode($tmpArr);  35$tmpStr = sha1($tmpStr);  36 37if($tmpStr == $signature){  38returntrue;  39 }else{  40returnfalse;  41 }  42 }  43 44publicfunction responseMsg()  45 {  46$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];  47if (!empty($postStr)){  48$this->logger("R ".$postStr);  49$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);  50$RX_TYPE = trim($postObj->MsgType);  51 52switch ($RX_TYPE)  53 {  54case "event":  55$result = $this->receiveEvent($postObj);  56break;  57case "text":  58$result = $this->receiveText($postObj);  59break;  60 }  61$this->logger("T ".$result);  62echo$result;  63 }else {  64echo "";  65exit;  66 }  67 }  68 69privatefunction receiveEvent($object)  70 {  71$content = "";  72switch ($object->Event)  73 {  74case "subscribe":  75$content = "欢迎关注方倍工作室 ";  76break;  77case "unsubscribe":  78$content = "取消关注";  79break;  80 }  81$result = $this->transmitText($object, $content);  82return$result;  83 }  84 85privatefunction receiveText($object)  86 {  87$keyword = trim($object->Content);  88 89include("");  90$content = getWeatherInfo($keyword);  91$result = $this->transmitNews($object, $content);  92return$result;  93 }  94 95 96privatefunction transmitText($object, $content)  97 {  98$textTpl = " 99100101%s102103104 "; 105$result = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content); 106return$result; 107 } 108109privatefunction transmitNews($object, $arr_item) 110 { 111if(!is_array($arr_item)) 112return; 113114$itemTpl = " 115 116 117 118 119 120 "; 121$item_str = ""; 122foreach ($arr_itemas$item) 123$item_str .= sprintf($itemTpl, $item['Title'], $item['Description'], $item['PicUrl'], $item['Url']); 124125$newsTpl = "126127128%s129130131%s132133$item_str134 "; 135136$result = sprintf($newsTpl, $object->FromUserName, $object->ToUserName, time(), count($arr_item)); 137return$result; 138 } 139140privatefunction logger($log_content) 141 { 142 } 143 }

三、效果演示

四、如何扩展

1. 在数据库加入邮编、区号、拼音等字段,可以扩展成使用区号等方式查询,请参考:

2. 拥有高级接口的用户,可以使用结合语音识别+中文分词技术,实现语音版的智能查询,请参考:

五、关于接口更新

1. 中国天气网已经停步上述免费接口的更新,需要调用天气数据需要申请SWA接口。

地址

2. 中国天气网的智慧天气接口在微信公众平台上的实现方法在《微信公众平台开发最佳实践》一书有讲解

地址



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