Question

I have a a data object, called DataElement. It contains a string of Base64 converted image bytes, along with a couple of other fields.

I am trying to post this to my wcf service and am getting an error ‘Expected status code in (200-299), got 400.

The goal is to post data + an image to the WCF (rest) service, and get a modified image back- an end to end test of what I am working on.

In my post method, if I leave the encoded string empty on the object everything works just fine- but if that string is anything other than empty I get this error.

My WCF service isn’t even being hit, it just bombs right to the error. Here is my post method… what am I doing wrong?

- (void)postDataToServer:(NSString*)server dataElement:(DataElement*)dataElement asJson:(BOOL)useJson
{
NSString *urlString = [[NSString alloc] init];
NSData *encodedData;

urlString = [[server copy] stringByAppendingString:@"EchoXml"];
encodedData = [self encodeDataElementAsXml:dataElement];

NSURL *url = [NSURL URLWithString:urlString];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];

NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:urlString parameters:nil];
[request setHTTPBody:encodedData];

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    [_responseTextView setText:[NSString stringWithFormat:@"Successfully uploaded file to %@", urlString]];

    NSObject *httpResponseObject;

    httpResponseObject = [self parseResponseAsXml:responseObject];

    if ([httpResponseObject isKindOfClass:[DataElement class]])
    {
        DataElement *dataElement = (DataElement *)httpResponseObject;
        _responseTextView.text = dataElement.DataText;
        if (dataElement.DataImageBase64 != nil)
        {
            UIImage *dataImage = [self getImageFromString:dataElement.DataImageBase64];
            self.responseImageView.image = dataImage;
        }
    }

    NSLog(@"Successfully uploaded file to %@", urlString);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // It goes here immediately
    [_responseTextView setText:[NSString stringWithFormat:@"Error: %@", error]];
    NSLog(@"Error: %@", error);
}];

[operation start];
}

Edit: Sorry the formatting got wonky when I pasted it in…

Answer 1

I know its bad form to answer my own question- but I found and fixed the problem. Bottom line, the code I was using above is fine- maybe not optimal (as Kurt pointed out) but it does what it is supposed to do.

The problem was on on my WCF service- REST service requests by default have a 65k upload limit. I reconfigured the service to allow large file uploads and everything is good.