Objective-C

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. Objective-C

#import <CkoHttp.h>
#import <NSString.h>
#import <CkoTask.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>

BOOL success = NO;

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

// See PostJson2 Example for the synchronous equivalent of this example.

CkoHttp *http = [[CkoHttp alloc] init];

// Sends a POST equivalent to the following CURL command:

// curl -X POST https://sandbox.plaid.com/institutions/get \
//   -H 'content-type: application/json' \
//   -d '{
//     "client_id": String,
//     "secret":String,
//     "count": Number,
//     "offset": Number
//   }'

// Suppress some default headers that would automatically added..
http.AcceptCharset = @"";
http.UserAgent = @"";
http.AcceptLanguage = @"";
http.AllowGzip = NO;

NSString *jsonBody = @"{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
CkoTask *task = [http PostJson2Async: @"https://sandbox.plaid.com/institutions/get" contentType: @"application/json" jsonText: jsonBody];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

// Start the background task.
success = [task Run];
if (!success) {
    NSLog(@"%@",task.LastErrorText);

    return;
}

// The application is now free to do anything else
// while the HTTP POST is in progress

// For this example, we'll simply sleep and periodically
// check to see if the HTTP POST is finished.  
while (task.Finished != YES) {
    // Sleep 100 ms.
    [task SleepMs: [NSNumber numberWithInt: 100]];
}

// When we get here, the task is either finished successfully or not, or was canceled/aborted.

// If the task was "canceled", it was canceled prior to actually starting.  This could
// happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
// background thread pool scheduler.  

// If the task was "aborted", it indicates that it was canceled while running in a background thread.  
// The ResultErrorText will likely indicate that the task was aborted.

// If the task "completed", then it ran to completion, but the actual success/failure of the method
// is determined by getting the result of the underlying method call.
// A task status of 7 indicates completion.
if ([task.StatusInt intValue] != 7) {
    NSLog(@"%@",@"Task did not complete.");
    NSLog(@"%@%@",@"task status: ",task.Status);

    return;
}

// When called synchronously, the PostJson2 method returns an HTTP response object,
// unless the method failed and there was no response to be had.
// Check to see if PostJson2 method failed (and thus there is no response object).
if (task.TaskSuccess == NO) {
    NSLog(@"%@",@"The underlying task failed, and there is no HTTP response object.");
    NSLog(@"%@",@"The LastErrorText for the underlying method call is:");
    NSLog(@"%@",task.ResultErrorText);

    return;
}

// To get the HTTP response object, create a new instance and load it with the result from the task.
CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
[resp LoadTaskResult: task];

int statusCode = [resp.StatusCode intValue];
NSLog(@"%@%d",@"Response status code = ",statusCode);

// Examine the JSON response..
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: resp.BodyStr];
json.EmitCompact = NO;
NSLog(@"%@",@"JSON Response Body:");
NSLog(@"%@",[json Emit]);