(C) AzureWebsites OAuth2 Password Flow

Demonstrates how to do OAuth 2.0 password flow for azurewebsites.net.

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#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkHttpRequest req;
    const char *tokenEndpoint;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    HCkStringBuilder sbXml;
    const char *destUrl;

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

    http = CkHttp_Create();

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putPath(req,"/token");
    CkHttpRequest_putContentType(req,"application/x-www-form-urlencoded");
    CkHttpRequest_AddParam(req,"grant_type","password");
    CkHttpRequest_AddParam(req,"username","your_username");
    CkHttpRequest_AddParam(req,"password","your_password");

    tokenEndpoint = "https://your_api.azurewebsites.net/token";
    resp = CkHttp_PostUrlEncoded(http,tokenEndpoint,req);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    // Sample JSON response:

    // {
    //   "access_token": "NQGHn ... xTS",
    //   "token_type": "bearer",
    //   "expires_in": 1209599,
    //   "userName": "your_username",
    //   ".issued": "Mon, 27 Apr 2020 23:49:35 GMT",
    //   ".expires": "Mon, 11 May 2020 23:49:35 GMT"
    // }

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_Dispose(resp);

    // ----------------------------------
    // Use the OAuth2 token in a request.
    // For example...

    sbXml = CkStringBuilder_Create();
    success = CkStringBuilder_LoadFile(sbXml,"c:/someDir/someXmlFile.xml","utf-8");
    if (success == FALSE) {
        printf("Failed to load the XML file.\n");
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    // Get the OAuth2 token and use it for authentication
    CkHttp_putAuthToken(http,CkJsonObject_stringOf(jResp,"token"));

    destUrl = "https://your_api.azurewebsites.net/destinationUrl";
    resp = CkHttp_PostXml(http,destUrl,CkStringBuilder_getAsString(sbXml),"utf-8");
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    // Examine the response body
    printf("%s\n",CkHttpResponse_bodyStr(resp));

    CkHttpResponse_Dispose(resp);


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);
    CkStringBuilder_Dispose(sbXml);

    }