(Objective-C) Walmart - Update bulk inventory

See Update bulk inventory for more information about this call.

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#import <NSString.h>
#import <CkoAuthUtil.h>
#import <CkoHttpRequest.h>
#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpResponse.h>
#import <CkoXml.h>

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

// Sends the following POST request:
// POST https://marketplace.walmartapis.com/v2/feeds?feedType=inventory

BOOL success;
NSString *url = @"https://marketplace.walmartapis.com/v2/feeds?feedType=inventory";

NSString *requestMethod = @"POST";

// First we need to generate a signature for our request.
// The signature needs to be re-generated for each new Walmart HTTP request.
CkoAuthUtil *authUtil = [[CkoAuthUtil alloc] init];

NSString *wmConsumerId = @"WALMART_CONSUMER_ID";
NSString *wmPrivateKey = @"WALMART_PRIVATE_KEY";
NSString *jsonStr = [authUtil WalmartSignature: url consumerId: wmConsumerId privateKey: wmPrivateKey requestMethod: requestMethod];
if (authUtil.LastMethodSuccess != YES) {
    NSLog(@"%@",authUtil.LastErrorText);
    return;
}

// Build the HTTP POST request.
CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
req.HttpVerb = @"POST";
req.ContentType = @"multipart/form-data";
req.Path = @"/v2/feeds?feedType=inventory";
[req AddHeader: @"Accept" value: @"application/xml"];

// The JSON returned by WalmartSignature contains the values to be used in the following
// header fields: WM_SEC.AUTH_SIGNATURE, WM_SEC.TIMESTAMP, and WM_QOS.CORRELATION_ID
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json Load: jsonStr];

[req AddHeader: @"WM_SVC.NAME" value: @"Walmart Marketplace"];
[req AddHeader: @"WM_QOS.CORRELATION_ID" value: [json StringOf: @"correlation_id"]];
[req AddHeader: @"WM_SEC.TIMESTAMP" value: [json StringOf: @"timestamp"]];
[req AddHeader: @"WM_SEC.AUTH_SIGNATURE" value: [json StringOf: @"signature"]];
[req AddHeader: @"WM_CONSUMER.ID" value: wmConsumerId];
//  Note: Make sure to replace "WALMART_CHANNEL_TYPE" with the actual value for your seller account...
[req AddHeader: @"WM_CONSUMER.CHANNEL.TYPE" value: @"WALMART_CHANNEL_TYPE"];

// The body of the POST will contain XML.  In this example, we'll load the XML
// from a file.  The XML contains inventory data that looks something like this:

// <InventoryFeed xmlns="http://walmart.com/">
//   <InventoryHeader>
//       <version>1.4</version>
//   </InventoryHeader>
//   <inventory>
//       <sku>1068155</sku>
//       <quantity>
//           <unit>EACH</unit>
//           <amount>10</amount>
//       </quantity>
//       <fulfillmentLagTime>1</fulfillmentLagTime>
//   </inventory>
//   <inventory>
//       <sku>10210321</sku>
//       <quantity>
//           <unit>EACH</unit>
//           <amount>20</amount>
//       </quantity>
//       <fulfillmentLagTime>3</fulfillmentLagTime>
//   </inventory>
// </InventoryFeed>

success = [req AddFileForUpload2: @"inventory" path: @"qa_data/walmart/inventory.xml" contentType: @"application/xml"];
if (success != YES) {
    NSLog(@"%@",req.LastErrorText);
    return;
}

CkoHttp *http = [[CkoHttp alloc] init];
CkoHttpResponse *resp = [http SynchronousRequest: @"marketplace.walmartapis.com" port: [NSNumber numberWithInt: 443] ssl: YES req: req];
if (http.LastMethodSuccess != YES) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

CkoXml *xml = [[CkoXml alloc] init];
[xml LoadXml: resp.BodyStr];

// A successful response should have a 200 response status
if ([resp.StatusCode intValue] != 200) {
    NSLog(@"%@",[xml GetXml]);
    NSLog(@"%@%d",@"Response Status Code: ",[resp.StatusCode intValue]);
    NSLog(@"%@",@"Failed.");

    return;
}

// Show the XML response..
NSLog(@"%@",[xml GetXml]);
NSLog(@"%@",@"--");
NSLog(@"%@",@"Success!");