CODEWITHSUNDEEP
iosobjective-chttp-postnsurlconnectionnsurlrequest
Timothy Rajan
Timothy Rajan

Reputation: 1957

iOS - Unable to successfully post Multipart form Data to server using HTTP Post request

I am developing an iPhone app where I need to pass on the data from the mobile to the server. The data is in the form of multipart form data.

unfortunately, the form data is not hitting the server. I tried all the ways. But I am not able to find the issue in my code. I am very sure the issue is in the client side as I am albe to hit API endpoint in the server from the Android app

The code is below

NSString *str;
                str=[NSString stringWithFormat:@"https://www.mysite.com/ttk/rest/detail/updat‌​edetail"];

                NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

                [request setURL:[NSURL URLWithString:str]];
                [request setHTTPMethod:@"POST"];

                NSMutableData *body = [NSMutableData data];

                NSString *boundary = @"---------------------------Boundary_1_511262261_1369143433608";

                NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
                [request addValue:contentType forHTTPHeaderField: @"Content-Type"];


                //  parameter imageData
                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"Content-Disposition: form-data; name=\"profileimg\"; filename=\"a.png\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                NSData *imageData=UIImagePNGRepresentation(pickedImage);

                [body appendData:[NSData dataWithData:imageData]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                //  parameter mobilenumber
                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"mobileNumber\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                [body appendData:[mobilenumber dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                //  parameter countryCode
                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"countryCode\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                [body appendData:[countrycode dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


                //  parameter displayName
                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"displayName\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                [body appendData:[strusername dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


                //  parameter mobileID

                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"mobileID\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                NSString *strsa3=[NSString stringWithFormat:@"%@",mobileID];
                [body appendData:[strsa3 dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                //  parameter emailid

                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"emailid\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                [body appendData:[stremail dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                //  parameter Boolean

                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"onlycontacts\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[searchwithin dataUsingEncoding:NSUTF8StringEncoding]];


                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


                //  parameter searchby
                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"searchby\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
                if(Radio1Check)
                {//Context
                    [body appendData:[@"Context" dataUsingEncoding:NSUTF8StringEncoding]];
                }
                else
                {
                    [body appendData:[@"Location" dataUsingEncoding:NSUTF8StringEncoding]];
                }

                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

                //     parameter show location to other

                [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"showlocation\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

                [body appendData:[location dataUsingEncoding:NSUTF8StringEncoding]];
                [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


                // close form
                [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];


                [request setHTTPBody:body];

                NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
                NSString *json=[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
                NSLog(@"Resp string: %@",json);

I have set the closing boundary and tested this code many times. But the issue seems to be hiding somewhere in the code which I am not able to find.

The returndata from the server is always Nil and is not hitting the server.. I have double checked the URL and the URL is also correct. Please help me in resolving this issue. Thanks for your time

Upvotes: 0

Views: 2668

Answers (1)

Brandon
Brandon

Reputation: 2427

Start by passing in an error object and inspect it to find out what went wrong when your returned data is nil. This is standard cocoa convention. The last couple of lines should look something like 

NSError *error; 
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil     error:&error];
if (returnData)
{
        NSString *json=[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; 
        NSLog(@"Resp string: %@",json);
}
else
{
    NSLog(@"Error: %@", error);
}

Upvotes: 1

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