Chilkat Online Tools

C / Salesforce Platform APIs / Client Credentials Flow

Back to Collection Items

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

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkHttpRequest req;
    HCkJsonObject jsonParam2;
    HCkJsonObject jsonParam3;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    const char *access_token;
    const char *signature;
    const char *scope;
    const char *instance_url;
    const char *id;
    const char *token_type;
    const char *issued_at;
    const char *api_instance_url;

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

    http = CkHttp_Create();

    req = CkHttpRequest_Create();
    CkHttpRequest_AddParam(req,"grant_type","client_credentials");

    jsonParam2 = CkJsonObject_Create();
    CkHttpRequest_AddParam(req,"client_id",CkJsonObject_emit(jsonParam2));

    jsonParam3 = CkJsonObject_Create();
    CkHttpRequest_AddParam(req,"client_secret",CkJsonObject_emit(jsonParam3));

    resp = CkHttp_PostUrlEncoded(http,"https://login.salesforce.com{{site}}/services/oauth2/token",req);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkJsonObject_Dispose(jsonParam2);
        CkJsonObject_Dispose(jsonParam3);
        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));

    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);
        CkJsonObject_Dispose(jsonParam2);
        CkJsonObject_Dispose(jsonParam3);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_Dispose(resp);

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "access_token": "<access_token>",
    //   "signature": "<signature>",
    //   "scope": "<scope list>",
    //   "instance_url": "https://<my_domain>",
    //   "id": "https://login.salesforce.com/id/00D.../005...",
    //   "token_type": "Bearer",
    //   "issued_at": "<timestamp>",
    //   "api_instance_url": "https://api.salesforce.com"
    // }

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

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.

    access_token = CkJsonObject_stringOf(jResp,"access_token");
    signature = CkJsonObject_stringOf(jResp,"signature");
    scope = CkJsonObject_stringOf(jResp,"scope");
    instance_url = CkJsonObject_stringOf(jResp,"instance_url");
    id = CkJsonObject_stringOf(jResp,"id");
    token_type = CkJsonObject_stringOf(jResp,"token_type");
    issued_at = CkJsonObject_stringOf(jResp,"issued_at");
    api_instance_url = CkJsonObject_stringOf(jResp,"api_instance_url");


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkJsonObject_Dispose(jsonParam2);
    CkJsonObject_Dispose(jsonParam3);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }

Curl Command

curl -X POST
	-H "Content-Type: application/x-www-form-urlencoded"
	--data-urlencode 'grant_type=client_credentials'
	--data-urlencode 'client_id={{clientId}}'
	--data-urlencode 'client_secret={{clientSecret}}'
https://login.salesforce.com{{site}}/services/oauth2/token

Postman Collection Item JSON

{
  "name": "Client Credentials Flow",
  "event": [
    {
      "listen": "test",
      "script": {
        "exec": [
          "const jsonData = pm.response.json();",
          "",
          "if(!jsonData.error){",
          "    const id = jsonData.id.split('/');",
          "    const context = pm.environment.name ? pm.environment : pm.collectionVariables;",
          "    context.set(\"_accessToken\", jsonData.access_token);",
          "    context.set(\"_endpoint\", jsonData.instance_url);",
          "    context.set(\"_userId\", id.pop());",
          "    context.set(\"_orgId\", id.pop());",
          "}"
        ],
        "type": "text/javascript"
      }
    }
  ],
  "protocolProfileBehavior": {
    "disableCookies": true
  },
  "request": {
    "auth": {
      "type": "noauth"
    },
    "method": "POST",
    "header": [
      {
        "key": "Content-Type",
        "value": "application/x-www-form-urlencoded"
      }
    ],
    "body": {
      "mode": "urlencoded",
      "urlencoded": [
        {
          "key": "grant_type",
          "value": "client_credentials",
          "type": "text"
        },
        {
          "key": "client_id",
          "value": "{{clientId}}",
          "type": "text"
        },
        {
          "key": "client_secret",
          "value": "{{clientSecret}}",
          "type": "text"
        }
      ]
    },
    "url": {
      "raw": "{{url}}{{site}}/services/oauth2/token",
      "host": [
        "{{url}}{{site}}"
      ],
      "path": [
        "services",
        "oauth2",
        "token"
      ]
    }
  },
  "response": [
    {
      "name": "Successful Client Credentials Flow",
      "originalRequest": {
        "method": "POST",
        "header": [
          {
            "key": "Content-Type",
            "value": "application/x-www-form-urlencoded"
          }
        ],
        "body": {
          "mode": "urlencoded",
          "urlencoded": [
            {
              "key": "grant_type",
              "value": "client_credentials",
              "type": "text"
            },
            {
              "key": "client_id",
              "value": "{{clientId}}",
              "type": "text"
            },
            {
              "key": "client_secret",
              "value": "{{clientSecret}}",
              "type": "text"
            }
          ]
        },
        "url": {
          "raw": "{{url}}{{site}}/services/oauth2/token",
          "host": [
            "{{url}}{{site}}"
          ],
          "path": [
            "services",
            "oauth2",
            "token"
          ]
        }
      },
      "status": "OK",
      "code": 200,
      "_postman_previewlanguage": "json",
      "header": [
        {
          "key": "Date",
          "value": "Thu, 16 Nov 2023 15:26:23 GMT"
        },
        {
          "key": "Set-Cookie",
          "value": "CookieConsentPolicy=0:1; path=/; expires=Fri, 15-Nov-2024 15:26:23 GMT; Max-Age=31536000"
        },
        {
          "key": "Set-Cookie",
          "value": "LSKey-c$CookieConsentPolicy=0:1; path=/; expires=Fri, 15-Nov-2024 15:26:23 GMT; Max-Age=31536000"
        },
        {
          "key": "Set-Cookie",
          "value": "BrowserId=gGlhuoSUEe6Srxe0Wza6Uw; domain=.salesforce.com; path=/; expires=Fri, 15-Nov-2024 15:26:23 GMT; Max-Age=31536000"
        },
        {
          "key": "Strict-Transport-Security",
          "value": "max-age=63072000; includeSubDomains"
        },
        {
          "key": "X-Content-Type-Options",
          "value": "nosniff"
        },
        {
          "key": "X-XSS-Protection",
          "value": "1; mode=block"
        },
        {
          "key": "X-Robots-Tag",
          "value": "none"
        },
        {
          "key": "Cache-Control",
          "value": "no-cache,must-revalidate,max-age=0,no-store,private"
        },
        {
          "key": "Expires",
          "value": "Thu, 01 Jan 1970 00:00:00 GMT"
        },
        {
          "key": "Content-Type",
          "value": "application/json;charset=UTF-8"
        },
        {
          "key": "Vary",
          "value": "Accept-Encoding"
        },
        {
          "key": "Content-Encoding",
          "value": "gzip"
        },
        {
          "key": "Transfer-Encoding",
          "value": "chunked"
        }
      ],
      "cookie": [
      ],
      "body": "{\n    \"access_token\": \"<access_token>\",\n    \"signature\": \"<signature>\",\n    \"scope\": \"<scope list>\",\n    \"instance_url\": \"https://<my_domain>\",\n    \"id\": \"https://login.salesforce.com/id/00D.../005...\",\n    \"token_type\": \"Bearer\",\n    \"issued_at\": \"<timestamp>\",\n    \"api_instance_url\": \"https://api.salesforce.com\"\n}"
    }
  ]
}