基于accuweather Linux C实例

以下是一个基于 AccuWeather API 的 Linux C 示例代码，它可以获取城市的当前天气信息：

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
#include <json-c/json.h>

#define API_KEY "your_api_key"
#define CITY_ID "your_city_id"

struct MemoryStruct {
    char *memory;
    size_t size;
};

static size_t WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp) {
    size_t realsize = size * nmemb;
    struct MemoryStruct *mem = (struct MemoryStruct *)userp;
    mem->memory = realloc(mem->memory, mem->size + realsize + 1);
    if (mem->memory == NULL) {
        printf("Not enough memory (realloc returned NULL)\n");
        return 0;
    }
    memcpy(&(mem->memory[mem->size]), contents, realsize);
    mem->size += realsize;
    mem->memory[mem->size] = 0;
    return realsize;
}

int main(void) {
    CURL *curl_handle;
    CURLcode res;
    struct MemoryStruct chunk;
    chunk.memory = malloc(1);
    chunk.size = 0;
    curl_global_init(CURL_GLOBAL_ALL);
    curl_handle = curl_easy_init();
    if (curl_handle) {
        char url[100];
        sprintf(url, "http://dataservice.accuweather.com/currentconditions/v1/%s?apikey=%s", CITY_ID, API_KEY);
        curl_easy_setopt(curl_handle, CURLOPT_URL, url);
        curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
        curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
        res = curl_easy_perform(curl_handle);
        if (res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        } else {
            struct json_object *parsed_json;
            struct json_object *weather;
            struct json_object *temperature;
            parsed_json = json_tokener_parse(chunk.memory);
            json_object_object_get_ex(parsed_json, "WeatherText", &weather);
            json_object_object_get_ex(parsed_json, "Temperature", &temperature);
            printf("Weather: %s\n", json_object_get_string(weather));
            printf("Temperature: %s\n", json_object_get_string(temperature));
            json_object_put(parsed_json);
        }
        curl_easy_cleanup(curl_handle);
    }
    curl_global_cleanup();
    free(chunk.memory);
    return 0;
}

在此示例中，我们使用了 curl 库来发出 HTTP GET 请求，并使用 json-c 库解析 JSON 响应。你需要将 `API_KEY` 和 `CITY_ID` 更改为你的 AccuWeather API 密钥和所需城市的 ID。