'How would I go about extracting specific values from a curl request into arrays in c++

I have a variable "s" that stores the output of the curl request. My code is as follows:

int main(void)
{
    std::string s;
    CURL* curl;
    CURLcode res;
    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
        curl_easy_setopt(curl, CURLOPT_URL, "www.ecobliss.co.za/run_student_query.php?query=Select%20*%20FROM%20data%20WHERE%20ID%20%3C%2030");
        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
        curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &s);
        std::cout << s << std::endl;
        struct curl_slist* headers = NULL;
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        res = curl_easy_perform(curl);
    }
    curl_easy_cleanup(curl);
   
    return 0;
}

The output of the request is as follows:

<p>Results from your query:</p><br>{"ID":"26","datetime":"2022-03-13 03:21:07","temperature":"25.3","humidity":"80.9","pressure":"1020.2"}<br>{"ID":"27","datetime":"2022-03-13 05:12:47","temperature":"24.8","humidity":"82.1","pressure":"1020.5"}<br>{"ID":"28","datetime":"2022-03-13 05:29:05","temperature":"24.9","humidity":"83.6","pressure":"1020.5"}<br>{"ID":"29","datetime":"2022-03-13 05:29:07","temperature":"24.9","humidity":"83.8","pressure":"1020.5"}

How would I go about putting the values of temperature, humidity and pressure into 3 different arrays?

c++arraysstringcurl


Solution 1:[1]

You can split the task into the two pieces: 1) extract json parts by searching the
delimiter, 2) parse each json with any open json lib. Personally I prefer the one included in Wt library but there are many.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Nikolai Kopylov

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