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(Objective-C) Egyptian eReceipt OAuth2 Client CredentialsSee more Egypt eReceipt ExamplesGet an OAuth2 access token for the Egyptian eReceipt REST API using client credentials (no interactivity with a web browser required). For more information, see https://sdk.invoicing.eta.gov.eg/ereceiptapi/01-authenticate-pos/
#import <CkoHttp.h> #import <CkoHttpRequest.h> #import <CkoHttpResponse.h> #import <CkoStringBuilder.h> #import <CkoJsonObject.h> #import <NSString.h> // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoHttp *http = [[CkoHttp alloc] init]; BOOL success; // Note: Any provider of a REST API, such as the Egyptian government in this case, can make life // much easier for developers by providing one or more of the following in the API documentation: // // 1) A sample CURL statement for each API call. // 2) A Postman collection, or Swagger/OpenAPI specification file. // 3) A sample of a raw HTTP request and response for each API call. // // The sample CURL statements or raw HTTP request/responses do not need to comprehensively show all // possible options. Providing a sample allows one to quickly make a successful API call. // It also allows for code generation directly from the CURL, Postman collection, or raw request/response, // and it tends to answer all questions about the format/structure of a request that, suprisingly, // remain ambiguous or not obvious in other forms of documentation. CkoHttpRequest *req = [[CkoHttpRequest alloc] init]; [req AddParam: @"grant_type" value: @"client_credentials"]; // Use your actual client ID and client secret... [req AddParam: @"client_id" value: @"d0394a9f-0607-40de-a978-2d3eb8375b04"]; [req AddParam: @"client_secret" value: @"6d62315e-d65a-4e41-9112-4195ea834edf"]; [req AddHeader: @"posserial" value: @"1234567899"]; [req AddHeader: @"pososversion" value: @"os"]; [req AddHeader: @"posmodelframework" value: @"1"]; [req AddHeader: @"presharedkey" value: @"03ac674216f3e1..."]; // When writing this example, the documentation at https://sdk.invoicing.eta.gov.eg/ereceiptapi/01-authenticate-pos/ // shows us the HTTP verb and path (POST /connect/token), however, // we don't see the actual domain where the request is to be sent. // What are the endpoints??? // It took some searching, but we found some endpoints here: https://sdk.invoicing.eta.gov.eg/faq/ // It's not immediately apparent which endpoint is to be used with a given API call. // Why not just include the endpoint in the documentation for each REST API call? // Endpoints are literally the #1 thing that needs to be known. // They can't just be buried in a FAQ. They should be up-front and obvious. // // So.. we're guessing the endpoint is likely "https://invoicing.eta.gov.eg/connect/token" CkoHttpResponse *resp = [http PostUrlEncoded: @"https://invoicing.eta.gov.eg/connect/token" req: req]; if (http.LastMethodSuccess == NO) { NSLog(@"%@",http.LastErrorText); return; } CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init]; [resp GetBodySb: sbResponseBody]; CkoJsonObject *jResp = [[CkoJsonObject alloc] init]; [jResp LoadSb: sbResponseBody]; jResp.EmitCompact = NO; NSLog(@"%@",@"Response Body:"); NSLog(@"%@",[jResp Emit]); int respStatusCode = [resp.StatusCode intValue]; NSLog(@"%@%d",@"Response Status Code = ",respStatusCode); if (respStatusCode >= 400) { NSLog(@"%@",@"Response Header:"); NSLog(@"%@",resp.Header); NSLog(@"%@",@"Failed."); return; } // If successful, the OAuth2 access token JSON looks like this: // { // "token_type": "Bearer", // "access_token": "eyJraW......R2sbqrY", // "expires_in": "3600", // "scope": "..." // } NSString *token_type = [jResp StringOf: @"token_type"]; NSString *access_token = [jResp StringOf: @"access_token"]; NSString *expires_in = [jResp StringOf: @"expires_in"]; NSString *scope = [jResp StringOf: @"scope"]; |
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