天气预报API
聚合API
https://www.juhe.cn/docs
注册个人账号,实名认证后每天有100次免费请求额度。免费API中包括天气预报、新闻头条、笑话大全、万年历等。
天气预报API
https://www.juhe.cn/docs/api/id/73
接口地址:http://apis.juhe.cn/simpleWeather/query
返回格式:json
请求方式:http get/post
请求示例:http://apis.juhe.cn/simpleWeather/query?city=%E8%8B%8F%E5%B7%9E&key=
接口备注:通过城市名称或城市ID查询天气预报情况
请求参数说明:
名称 | 必填 | 类型 | 说明 | |
---|---|---|---|---|
city | 是 | string | 要查询的城市名称/id,城市名称如:温州、上海、北京,需要utf8 urlencode | |
key | 是 | string | 在个人中心->我的数据,接口名称上方查看 |
返回参数说明:
名称 | 类型 | 说明 | |
---|---|---|---|
error_code | int | 返回码,0为查询成功 | |
reason | string | 返回说明 | |
result | string | 返回结果集 | |
- | - | - | |
realtime | - | 当前天气详情情况 | |
info | string | 天气情况,如:晴、多云 | |
wid | string | 天气标识id,可参考小接口2 | |
temperature | string | 温度,可能为空 | |
humidity | string | 湿度,可能为空 | |
direct | string | 风向,可能为空 | |
power | string | 风力,可能为空 | |
aqi | string | 空气质量指数,可能为空 | |
- | - | - | |
future | - | 近5天天气情况 | |
date | string | 日期 | |
temperature | string | 温度,最低温/最高温 | |
weather | string | 天气情况 | |
direct | string | 风向 |
JSON返回示例:
{
"reason": "查询成功",
"result": {
"city": "苏州",
"realtime": {
"temperature": "4",
"humidity": "82",
"info": "阴",
"wid": "02",
"direct": "西北风",
"power": "3级",
"aqi": "80"
},
"future": [
{
"date": "2019-02-22",
"temperature": "1/7℃",
"weather": "小雨转多云",
"wid": {
"day": "07",
"night": "01"
},
"direct": "北风转西北风"
},
{
"date": "2019-02-23",
"temperature": "2/11℃",
"weather": "多云转阴",
"wid": {
"day": "01",
"night": "02"
},
"direct": "北风转东北风"
},
{
"date": "2019-02-24",
"temperature": "6/12℃",
"weather": "多云",
"wid": {
"day": "01",
"night": "01"
},
"direct": "东北风转北风"
},
{
"date": "2019-02-25",
"temperature": "5/12℃",
"weather": "小雨转多云",
"wid": {
"day": "07",
"night": "01"
},
"direct": "东北风"
},
{
"date": "2019-02-26",
"temperature": "5/11℃",
"weather": "多云转小雨",
"wid": {
"day": "01",
"night": "07"
},
"direct": "东北风"
}
]
},
"error_code": 0
}
Linux下通过C获取天气
通过curl命令进行http get请求,并使用cJSON库解析返回结果
cJSON库:https://sourceforge.net/projects/cjson/
weather.c
#include
#include
#include "include.h"
//!!!使用时请换成自己的KEY
#define API_KEY "自己的KEY"
//输出菜单
int menu();
//请求对应城市的天气
int simpleWeather(int cityIndex);
enum{
BEJING = 0,
SHANGHAI = 1,
FUZHOU = 2,
SHENZHENG = 3,
CITY_COUNT,
};
char *city[CITY_COUNT] = {
"北京",
"上海",
"福州",
"深圳"
};
int main(int argc, char const *argv[])
{
int input = 0;
while (1)
{
menu();
scanf("%d", &input);
switch (input)
{
case 1:
//printf("北京\n");
simpleWeather(BEJING);
break;
case 2:
//printf("上海\n");
simpleWeather(SHANGHAI);
break;
case 3:
//printf("福州\n");
simpleWeather(FUZHOU);
break;
default:
printf("未知菜单,程序退出\n");
return 0;
}
}
return 0;
}
int menu()
{
printf("天气预报\n");
printf("1.北京\n");
printf("2.上海\n");
printf("3.福州\n");
printf("输入序号获取天气:\n");
return 0;
}
int simpleWeather(int cityIndex)
{
if(cityIndex >= CITY_COUNT){
printf("查询不到城市数据!\n");
return 0;
}
printf("查询城市 :%s\n", city[cityIndex]);
char cmd[MAX_LEN] = {0};
char result[RESULT_BUF_LEN] = {0};
//生成API请求url
sprintf(cmd, "curl -s \"http://apis.juhe.cn/simpleWeather/query?city=%s&key=%s\"", city[cityIndex], API_KEY);
popenCmd(cmd, result);
//printf("result :%s\n", result);
cJSON * root = NULL;
cJSON * api_result = NULL, *api_realtime = NULL;
root = cJSON_Parse(result);
if(NULL == root){
printf("解析json数据失败!\n");
return -1;
}
//先查找result
api_result = cJSON_GetObjectItem(root, "result");
//再查找realtime
api_realtime = cJSON_GetObjectItem(api_result, "realtime");
//printf("%s\n", cJSON_Print(api_realtime));
/*
"realtime": {
"temperature": "30",
"humidity": "48",
"info": "阴",
"wid": "02",
"direct": "南风",
"power": "2级",
"aqi": "65"
}
*/
cJSON *temp = cJSON_GetObjectItem(api_realtime, "temperature");
cJSON *humidity = cJSON_GetObjectItem(api_realtime, "humidity");
cJSON *info = cJSON_GetObjectItem(api_realtime, "info");
cJSON *direct = cJSON_GetObjectItem(api_realtime, "direct");
printf("温度:%s度\n", temp->valuestring);
printf("湿度:%s度\n", humidity->valuestring);
printf("天气:%s\n", info->valuestring);
printf("风向:%s\n", direct->valuestring);
return 0;
}
tools.c
目前读取popen结果使用最大缓存102400,最好修改代码将缓存改小,重复读取。
#include
#include "include.h"
int popenCmd(char *cmd, char *result)
{
//运行命令,将结果保存到results
FILE *fp = popen(cmd, "r");
if (NULL == fp)
{
printf("打开 file命令失败\n");
goto err;
}
//将结果读取到results字符串数组中
fgets(result, RESULT_BUF_LEN, fp);
if (fp)
{
pclose(fp);
fp = NULL;
}
return 0;
err:
if (fp)
{
pclose(fp);
fp = NULL;
}
return -1;
}
include.h
#include "cJSON.h"
#define MAX_LEN 256
#define RESULT_BUF_LEN 102400
//执行命令,将命令结果保存到result
int popenCmd(char *cmd, char *result);
#编译命令:
gcc weather.c cJSON.c tools.c -lm -o weather
./weather
#输入结果:
天气预报
1.北京
2.上海
3.福州
输入序号获取天气:
1
查询城市 :北京
温度:25度
湿度:82度
天气:多云
风向:东北风