(Unicode 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 <C_CkJwtW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    const wchar_t *apiKey;
    const wchar_t *apiSecret;
    HCkJwtW jwt;
    HCkJsonObjectW jose;
    BOOL success;
    HCkJsonObjectW claims;
    int curDateTime;
    int oneMonth;
    const wchar_t *strJwt;
    HCkHttpW http;
    HCkStringBuilderW sbResponseBody;
    HCkJsonObjectW jResp;
    int respStatusCode;
    const wchar_t *id;
    const wchar_t *first_name;
    const wchar_t *last_name;
    const wchar_t *email;
    int v_type;
    int pmi;
    const wchar_t *timezone;
    int verified;
    const wchar_t *created_at;
    const wchar_t *last_login_time;
    const wchar_t *language;
    const wchar_t *phone_number;
    const wchar_t *status;
    const wchar_t *role_id;
    int page_count;
    int page_number;
    int page_size;
    int total_records;
    int i;
    int count_i;

    // 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...
    apiKey = L"o9rw6Gq0RnqlkfaSqtCMOA";
    apiSecret = L"UslmE23Kjh7at9z3If1xAHEyLmPDNxvxQrjR";

    // Create a JWT to authenticate Zoom API requests.
    jwt = CkJwtW_Create();

    jose = CkJsonObjectW_Create();
    success = CkJsonObjectW_UpdateString(jose,L"alg",L"HS256");
    success = CkJsonObjectW_UpdateString(jose,L"typ",L"JWT");

    // Build claims to look like this:
    // {"aud":null,"iss":"o9rw6Gq0RnqlkfaSqtCMOA","exp":1627651762,"iat":1627646363}
    claims = CkJsonObjectW_Create();
    success = CkJsonObjectW_UpdateString(claims,L"iss",apiKey);
    success = CkJsonObjectW_UpdateNull(claims,L"aud");

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

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

    // Produce the smallest possible JWT:
    CkJwtW_putAutoCompact(jwt,TRUE);

    strJwt = CkJwtW_createJwt(jwt,CkJsonObjectW_emit(jose),CkJsonObjectW_emit(claims),apiSecret);

    wprintf(L"%s\n",strJwt);

    // 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

    http = CkHttpW_Create();

    // 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

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

    sbResponseBody = CkStringBuilderW_Create();
    success = CkHttpW_QuickGetSb(http,L"https://api.zoom.us/v2/users?status=active&page_size=30&page_number=1",sbResponseBody);
    if (success == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkJwtW_Dispose(jwt);
        CkJsonObjectW_Dispose(jose);
        CkJsonObjectW_Dispose(claims);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbResponseBody);
        return;
    }

    jResp = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(jResp,sbResponseBody);
    CkJsonObjectW_putEmitCompact(jResp,FALSE);

    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",CkJsonObjectW_emit(jResp));

    respStatusCode = CkHttpW_getLastStatus(http);
    wprintf(L"Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",CkHttpW_lastHeader(http));
        wprintf(L"Failed.\n");
        CkJwtW_Dispose(jwt);
        CkJsonObjectW_Dispose(jose);
        CkJsonObjectW_Dispose(claims);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbResponseBody);
        CkJsonObjectW_Dispose(jResp);
        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

    page_count = CkJsonObjectW_IntOf(jResp,L"page_count");
    page_number = CkJsonObjectW_IntOf(jResp,L"page_number");
    page_size = CkJsonObjectW_IntOf(jResp,L"page_size");
    total_records = CkJsonObjectW_IntOf(jResp,L"total_records");
    i = 0;
    count_i = CkJsonObjectW_SizeOfArray(jResp,L"users");
    while (i < count_i) {
        CkJsonObjectW_putI(jResp,i);
        id = CkJsonObjectW_stringOf(jResp,L"users[i].id");
        first_name = CkJsonObjectW_stringOf(jResp,L"users[i].first_name");
        last_name = CkJsonObjectW_stringOf(jResp,L"users[i].last_name");
        email = CkJsonObjectW_stringOf(jResp,L"users[i].email");
        v_type = CkJsonObjectW_IntOf(jResp,L"users[i].type");
        pmi = CkJsonObjectW_IntOf(jResp,L"users[i].pmi");
        timezone = CkJsonObjectW_stringOf(jResp,L"users[i].timezone");
        verified = CkJsonObjectW_IntOf(jResp,L"users[i].verified");
        created_at = CkJsonObjectW_stringOf(jResp,L"users[i].created_at");
        last_login_time = CkJsonObjectW_stringOf(jResp,L"users[i].last_login_time");
        language = CkJsonObjectW_stringOf(jResp,L"users[i].language");
        phone_number = CkJsonObjectW_stringOf(jResp,L"users[i].phone_number");
        status = CkJsonObjectW_stringOf(jResp,L"users[i].status");
        role_id = CkJsonObjectW_stringOf(jResp,L"users[i].role_id");
        i = i + 1;
    }



    CkJwtW_Dispose(jwt);
    CkJsonObjectW_Dispose(jose);
    CkJsonObjectW_Dispose(claims);
    CkHttpW_Dispose(http);
    CkStringBuilderW_Dispose(sbResponseBody);
    CkJsonObjectW_Dispose(jResp);

    }