(C++) Zoom API - Create JWT to Authenticate API Requests

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Creates a JWT for the Zoom API.

For more information, see https://marketplace.zoom.us/docs/api-reference/using-zoom-apis#using-jwt

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#include <CkJwt.h>
#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Use your API key and secret here...
    const char *apiKey = "o9rw6Gq0RnqlkfaSqtCMOA";
    const char *apiSecret = "UslmE23Kjh7at9z3If1xAHEyLmPDNxvxQrjR";

    // Create a JWT to authenticate Zoom API requests.
    CkJwt jwt;

    CkJsonObject jose;
    bool success = jose.UpdateString("alg","HS256");
    success = jose.UpdateString("typ","JWT");

    // Build claims to look like this:
    // {"aud":null,"iss":"o9rw6Gq0RnqlkfaSqtCMOA","exp":1627651762,"iat":1627646363}
    CkJsonObject claims;
    success = claims.UpdateString("iss",apiKey);
    success = claims.UpdateNull("aud");

    // Set the timestamp of when the JWT was created to now.
    int curDateTime = jwt.GenNumericDate(0);
    success = claims.AddIntAt(-1,"iat",curDateTime);

    // Set the timestamp defining an expiration time (end time) for the token
    // to be now + 1 month(3600 * 24 * 30 seconds)
    int oneMonth = 3600 * 24 * 30;
    success = claims.AddIntAt(-1,"exp",curDateTime + oneMonth);

    // Produce the smallest possible JWT:
    jwt.put_AutoCompact(true);

    const char *strJwt = jwt.createJwt(jose.emit(),claims.emit(),apiSecret);

    std::cout << strJwt << "\r\n";

    // Let's test the JWT to by sending the following request:

    // curl --request GET \
    //   --url 'https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1' \
    //   --header 'authorization: Bearer { your_token }' \
    //   --header 'content-type: application/json

    CkHttp http;

    // Implements the following CURL command:

    // curl --request GET \
    //   --url 'https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1' \
    //   --header 'authorization: Bearer { your_token }' \
    //   --header 'content-type: application/json

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    http.SetRequestHeader("content-type","application/json");
    // Adds the "Authorization: Bearer { your_token }" header.
    http.put_AuthToken(strJwt);

    CkStringBuilder sbResponseBody;
    success = http.QuickGetSb("https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1",sbResponseBody);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    std::cout << "Response Body:" << "\r\n";
    std::cout << jResp.emit() << "\r\n";

    int respStatusCode = http.get_LastStatus();
    std::cout << "Response Status Code = " << respStatusCode << "\r\n";
    if (respStatusCode >= 400) {
        std::cout << "Response Header:" << "\r\n";
        std::cout << http.lastHeader() << "\r\n";
        std::cout << "Failed." << "\r\n";
        return;
    }

    // Sample output:

    // {
    //   "page_count": 1,
    //   "page_number": 1,
    //   "page_size": 30,
    //   "total_records": 1,
    //   "users": [
    //     {
    //       "id": "s8uAiMJiRmS_-eu1yOhKlg",
    //       "first_name": "Joe",
    //       "last_name": "Example",
    //       "email": "joe@example.com",
    //       "type": 1,
    //       "pmi": 5224934114,
    //       "timezone": "America/Chicago",
    //       "verified": 1,
    //       "created_at": "2021-07-30T11:56:37Z",
    //       "last_login_time": "2021-07-30T11:56:37Z",
    //       "language": "en-US",
    //       "phone_number": "",
    //       "status": "active",
    //       "role_id": "0"
    //     }
    //   ]
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    const char *id = 0;
    const char *first_name = 0;
    const char *last_name = 0;
    const char *email = 0;
    int v_type;
    int pmi;
    const char *timezone = 0;
    int verified;
    const char *created_at = 0;
    const char *last_login_time = 0;
    const char *language = 0;
    const char *phone_number = 0;
    const char *status = 0;
    const char *role_id = 0;

    int page_count = jResp.IntOf("page_count");
    int page_number = jResp.IntOf("page_number");
    int page_size = jResp.IntOf("page_size");
    int total_records = jResp.IntOf("total_records");
    int i = 0;
    int count_i = jResp.SizeOfArray("users");
    while (i < count_i) {
        jResp.put_I(i);
        id = jResp.stringOf("users[i].id");
        first_name = jResp.stringOf("users[i].first_name");
        last_name = jResp.stringOf("users[i].last_name");
        email = jResp.stringOf("users[i].email");
        v_type = jResp.IntOf("users[i].type");
        pmi = jResp.IntOf("users[i].pmi");
        timezone = jResp.stringOf("users[i].timezone");
        verified = jResp.IntOf("users[i].verified");
        created_at = jResp.stringOf("users[i].created_at");
        last_login_time = jResp.stringOf("users[i].last_login_time");
        language = jResp.stringOf("users[i].language");
        phone_number = jResp.stringOf("users[i].phone_number");
        status = jResp.stringOf("users[i].status");
        role_id = jResp.stringOf("users[i].role_id");
        i = i + 1;
    }
    }