Status Code 400 when uploading an image to an API

Question

I'm trying to upload an image to an image recognition API, but I'm getting this is the NSHTTPURLResponse I'm getting.

<NSHTTPURLResponse: 0x12f7ce4e0> { URL: https:/api.vize.ai/v1/classify/ } { status code: 400, headers {
    Allow = "POST, OPTIONS";
    Connection = "keep-alive";
    "Content-Language" = en;
    "Content-Length" = 37;
    "Content-Type" = "application/json";
    Date = "Wed, 21 Feb 2018 12:24:17 GMT";
    "Referrer-Policy" = "strict-origin";
    Server = "nginx/1.13.7";
    "Strict-Transport-Security" = "max-age=31536000; includeSubDomains; preload";
    Vary = "Accept, Host, Accept-Language, Cookie";
    "X-Frame-Options" = DENY;
    "X-UA-Compatible" = "IE=Edge,chrome=1";
    "x-content-type-options" = nosniff;
    "x-xss-protection" = "1; mode=block";
} }

I'm using an image picker to select an image, and then upload that. Here's my implementation of that.

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    // Dismiss image picker
    [picker dismissViewControllerAnimated:YES completion:nil];

    // Classify image
    UIImage *image = [info objectForKey:@"UIImagePickerControllerEditedImage"];

    // Request authorization
    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
        switch (status) {
                case PHAuthorizationStatusAuthorized:
                NSLog(@"PHAuthorizationStatusAuthorized");
                break;
                case PHAuthorizationStatusDenied:
                NSLog(@"PHAuthorizationStatusDenied");
                break;
                case PHAuthorizationStatusNotDetermined:
                NSLog(@"PHAuthorizationStatusNotDetermined");
                break;
                case PHAuthorizationStatusRestricted:
                NSLog(@"PHAuthorizationStatusRestricted");
                break;
        }
    }];

    // Get image name
    NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
    PHFetchResult *result = [PHAsset fetchAssetsWithALAssetURLs:@[refURL] options:nil];
    NSString *filename = [[result firstObject] filename];

    // Get image file path and append file name onto it
    NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
    NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:filename];
    [imageData writeToFile:path atomically:YES];

    NSDictionary *headers = @{ @"content-type": @"multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW",
                               @"Content-Type": @"multipart/form-data",
                               @"Accept": @"application/json",
                               @"Authorization": @"Token 60f6be2a21bdf731d86a8817b440a1afba692fed",
                               @"Cache-Control": @"no-cache",
                               @"Postman-Token": @"7d262730-0c7d-66dc-bbbb-43f40dbfe8ce" };
    NSArray *parameters = @[ @{ @"name": @"task", @"value": @"dc9ef71a-b8a0-4a12-90fd-83d717cf887f" },
                             @{ @"name": @"image_file", @"fileName": path } ];
    NSString *boundary = @"----WebKitFormBoundary7MA4YWxkTrZu0gW";    

    NSError *error;
    NSMutableString *body = [NSMutableString string];
    for (NSDictionary *param in parameters) {
        [body appendFormat:@"--%@\r\n", boundary];
        if (param[@"fileName"]) {
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"; filename=\"%@\"\r\n", param[@"name"], param[@"fileName"]];
            [body appendFormat:@"Content-Type: %@\r\n\r\n", param[@"contentType"]];
            [body appendFormat:@"%@", [NSString stringWithContentsOfFile:param[@"fileName"] encoding:/*NSASCIIStringEncoding*/NSASCIIStringEncoding error:&error]]; // here NSUTF8StringEncoding

            if (error) {
                NSLog(@"%@", error);
            }
        } else {
            [body appendFormat:@"Content-Disposition:form-data; name=\"%@\"\r\n\r\n", param[@"name"]];
            [body appendFormat:@"%@", param[@"value"]];
        }
    }
    [body appendFormat:@"\r\n--%@--\r\n", boundary];
    NSData *postData = [body dataUsingEncoding:/*NSASCIIStringEncoding*/NSASCIIStringEncoding]; // here NSUTF8StringEncoding

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://api.vize.ai/v1/classify/"]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:10.0];
    [request setHTTPMethod:@"POST"];
    [request setAllHTTPHeaderFields:headers];
    [request setHTTPBody:postData];

    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                                completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                    if (error) {
                                                        NSLog(@"%@", error);
                                                    } else {
                                                        NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                        NSLog(@"%@", httpResponse);
                                                    }
                                                }];
    [dataTask resume];
}

What's my problem here?

Answer 1

Using afnetworking for this. here is working code :

    -(void)uploadImagetoServer

    {

        if(self.titleTextField.text.length>0)
        {

    self.descrptionTxtview.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));
           // NSString *firstName=[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] valueForKey:@"username"]];
            //NSString *lastName=[NSString stringWithFormat:@"%@",[[NSUserDefaults standardUserDefaults] valueForKey:@"lastname"]];



NSString *fullname=[NSString stringWithFormat:@"%@  %@",[[NSUserDefaults standardUserDefaults] valueForKey:@"firstname"],[[NSUserDefaults standardUserDefaults] valueForKey:@"lastname"]];

                NSString * type ;


            NSString * userId = [NSString stringWithFormat: @"%@",[[NSUserDefaults standardUserDefaults] valueForKey:@"userid"]];
          //  lastName= [NSString stringWithFormat: @"%@ %@", firstName, lastName];
            userInfoDict=[[NSMutableDictionary alloc] init];
            [userInfoDict setValue:userId forKey:@"user_id"];
             [userInfoDict setValue:fullname forKey:@"username"];
            [userInfoDict setValue:@"29" forKey:@"catid"];
             [userInfoDict setValue:[NSString stringWithFormat: @"%@", self.titleTextField.text] forKey:@"title"];
            [_request setTimeoutInterval:1000];
            NSLog(@"Parameters :%@",userInfoDict);
            NSString * baseUrl = @"https://justgolive.net/api/Home/videoUpload/";
            _request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[NSString stringWithFormat:@"%@",baseUrl] parameters:userInfoDict constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
                        {
                            NSLog(@"\n\n requrst time out is%f\n\n", [_request timeoutInterval]);


                            NSData* data = UIImagePNGRepresentation(_imagedRecived);

                            [formData appendPartWithFileData:data name:@"video" fileName:@"myImage.png" mimeType:@"image/png"];

                            NSLog(@"\n image  upload %@\n\n",_videoUrl);

                        } error:nil];


           // [self.view addSubview:_playerProgress];
           // [_playerProgress setHidden:NO];
            self.descrptionTxtview.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));
            AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

            _uploadTask = [manager
                           uploadTaskWithStreamedRequest:_request
                           progress:^(NSProgress * _Nonnull uploadProgress)

                           {
                               // This is not called back on the main queue.
                              // You are responsible for dispatching to the main queue for UI updates
                               dispatch_async(dispatch_get_main_queue(), ^{


                               //    [_btn_sendbutton setHidden:YES];


                                   //Update the progress view
                              //     [_playerProgress setProgress:uploadProgress.fractionCompleted];



                             //      [self.view addSubview:_largestProgressView];

                             //      [_largestProgressView setProgress:uploadProgress.fractionCompleted animated:YES];
                                  NSLog(@"\n uploading image vlaues %f\n",uploadProgress.fractionCompleted);

                                   // for uploading video in background
                                   [self.uploProgressView setHidden:NO];
                                   [self.uploProgressView setProgress:uploadProgress.fractionCompleted animated:YES];
                                   if (uploadProgress.completedUnitCount == 1) {
                                       //  [self.navigationController popToRootViewControllerAnimated:YES];
                                   }
                                  manager.attemptsToRecreateUploadTasksForBackgroundSessions=YES;


                               });
                         }
                          completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
                               if (error) {
                                   NSLog(@"Error: %@", error);
                                 self.descrptionTxtview.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));

                                 // [_playerProgress setHidden:YES];

                               } else
                               {

                                   NSLog(@"%@ ", response);
                                   manager.attemptsToRecreateUploadTasksForBackgroundSessions=NO;
                                   [_playerProgress setHidden:YES];

                                   NSLog(@"\n\n REsponse Form Server %@\n\n",responseObject);
                                   NSArray * ressp = responseObject;
                                   NSError *error;
                                   [[NSFileManager defaultManager] removeItemAtURL:_videoUrl error:&error];
                                   if ([[ressp valueForKey:@"message"] isEqualToString:@"Successfull"]) {
                                       [self.navigationController popToRootViewControllerAnimated:YES];
                                   }
                                 [model setUpLogin:YES];
                                 //


                               }
                           }


                           ];

            [_uploadTask resume];

           [self hideStuffOndoneUploading];

        }
        else
           [self alertControllerMethod:@"Please add story description and try again" forTitle:@"Warning" withTag:nil];


    }