iphone - How to post more parameters with image upload code in iOS?

Question

Hi I am uploading image on php server and successfully uploaded with the help of this code

- (NSString*)uploadData:(NSData *)data toURL:(NSString *)urlStr:(NSString *)_userID
{
    // File upload code adapted from http://www.cocoadev.com/index.pl?HTTPFileUpload
    // and http://www.cocoadev.com/index.pl?HTTPFileUploadSample
    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlStr]];
    [request setHTTPMethod:@"POST"];

//    NSString*  = [NSString stringWithString:@"0xKhTmLbOuNdArY"];
    NSString *stringBoundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];


    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"
--%@
",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
//  [body appendData:[[NSString stringWithFormat:@"userId=%@",_userID] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="userfile"; filename="image%@.jpg"
", _userID] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream

"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:data]];
    [body appendData:[[NSString stringWithFormat:@"
--%@--
",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    // setting the body of the post to the reqeust
    [request setHTTPBody:body];

    // now lets make the connection to the web
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@",returnString);

    return returnString;

}

Now i want to send my user Id also on derver side how can i send my user id? I tried to it in this way

[body appendData:[[NSString stringWithFormat:@"userId=%@",_userID] dataUsingEncoding:NSUTF8StringEncoding]];

but in vain then i tried to send it in this way

[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name="userfile"; filename="image%@.jpg"; userId="%@"
", _userID, _userID] dataUsingEncoding:NSUTF8StringEncoding]];

but again in vain so kindly guide me what to do!

Answer 1

If you haven't thought about using AFNetworking, you should. It makes dealing with web-services much easier. I have done something similar to what I think you are wanting to do. I wrote a custom class to fire off network requests. Here ya go: NetworkClient.h

/*
 NetworkClient.h

 Created by LJ Wilson on 2/3/12.
 Copyright (c) 2012 LJ Wilson. All rights reserved.
 License:

 Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 and associated documentation files (the "Software"), to deal in the Software without restriction, 
 including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all copies or 
 substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT 
 NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT 
 OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#import <Foundation/Foundation.h>

extern NSString * const APIKey;

@interface NetworkClient : NSObject

+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                          block:(void (^)(id obj))block;

+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                    syncRequest:(BOOL)syncRequest
                          block:(void (^)(id obj))block;

+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                    syncRequest:(BOOL)syncRequest
             alertUserOnFailure:(BOOL)alertUserOnFailure
                          block:(void (^)(id obj))block;

+(void)processFileUploadRequestWithURL:(NSString *)url 
                             andParams:(NSDictionary *)params 
                              fileData:(NSData *)fileData 
                              fileName:(NSString *)fileName
                              mimeType:(NSString *)mimeType 
                                 block:(void (^)(id obj))block;

+(void)handleNetworkErrorWithError:(NSError *)error;

+(void)handleNoAccessWithReason:(NSString *)reason;

@end

NetworkClient.m

/*
 NetworkClient.m

 Created by LJ Wilson on 2/3/12.
 Copyright (c) 2012 LJ Wilson. All rights reserved.
 License:

 Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 and associated documentation files (the "Software"), to deal in the Software without restriction, 
 including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all copies or 
 substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT 
 NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT 
 OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#import "NetworkClient.h"
#import "AFHTTPClient.h"
#import "AFHTTPRequestOperation.h"
#import "SBJson.h"

NSString * const APIKey = @"APIKEY GOES HERE IF YOU WANT TO USE ONE";

@implementation NetworkClient

+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                          block:(void (^)(id obj))block {

    [self processURLRequestWithURL:url andParams:params syncRequest:NO alertUserOnFailure:NO block:^(id obj) {
        block(obj);
    }];
}

+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                    syncRequest:(BOOL)syncRequest
                          block:(void (^)(id obj))block {
    [self processURLRequestWithURL:url andParams:params syncRequest:syncRequest alertUserOnFailure:NO block:^(id obj) {
        block(obj);
    }];
}


+(void)processURLRequestWithURL:(NSString *)url 
                      andParams:(NSDictionary *)params 
                    syncRequest:(BOOL)syncRequest
             alertUserOnFailure:(BOOL)alertUserOnFailure
                          block:(void (^)(id obj))block {

    // Default url goes here, pass in a nil to use it
    if (url == nil) {
        url = @"http://www.mydomain.com/mywebservice";
    }

    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:params];
    [dict setValue:APIKey forKey:@"APIKey"];

    NSDictionary *newParams = [[NSDictionary alloc] initWithDictionary:dict];

    NSURL *requestURL;
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:requestURL];

    NSMutableURLRequest *theRequest = [httpClient requestWithMethod:@"POST" path:url parameters:newParams];

    __block NSString *responseString = [NSString stringWithString:@""];

    AFHTTPRequestOperation *_operation = [[AFHTTPRequestOperation alloc] initWithRequest:theRequest];
    __weak AFHTTPRequestOperation *operation = _operation;

    [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        responseString = [operation responseString];

        id retObj = [responseString JSONValue];

        // Check for invalid response (No Access)
        if ([retObj isKindOfClass:[NSDictionary class]]) {
            if ([[(NSDictionary *)retObj valueForKey:@"Message"] isEqualToString:@"No Access"]) {
                block(nil);
                [self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
            }
        } else if ([retObj isKindOfClass:[NSArray class]]) {
            if ([(NSArray *)retObj count] > 0) {
                NSDictionary *dict = [(NSArray *)retObj objectAtIndex:0];
                if ([[dict valueForKey:@"Message"] isEqualToString:@"No Access"]) {
                    block(nil);
                    [self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
                }
            }
        }
        block(retObj);
    } 
                                      failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                          NSLog(@"Failed with error = %@", [NSString stringWithFormat:@"[Error]:%@",error]);
                                          block(nil);
                                          if (alertUserOnFailure) {
                                              // Let the user know something went wrong
                                              [self handleNetworkErrorWithError:operation.error];
                                          }

                                      }];

    [operation start];

    if (syncRequest) {
        // Process the request syncronously
        [operation waitUntilFinished];
    } 


}


#pragma mark - processFileUpload
+(void)processFileUploadRequestWithURL:(NSString *)url 
                             andParams:(NSDictionary *)params 
                              fileData:(NSData *)fileData 
                              fileName:(NSString *)fileName
                              mimeType:(NSString *)mimeType 
                                 block:(void (^)(id obj))block {

    // Default url goes here, pass in a nil to use it
    if (url == nil) {
        url = @"http://www.mydomain.com/mywebservice";
    }

    NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:params];
    [dict setValue:APIKey forKey:@"APIKey"];

    NSDictionary *newParams = [[NSDictionary alloc] initWithDictionary:dict];
    AFHTTPClient *client= [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:url]];  

    NSMutableURLRequest *myRequest = [client multipartFormRequestWithMethod:@"POST" 
                                                                       path:@"" 
                                                                 parameters:newParams 
                                                  constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
        [formData appendPartWithFileData:fileData name:fileName fileName:fileName mimeType:mimeType];
    }];


    AFHTTPRequestOperation *_operation = [[AFHTTPRequestOperation alloc] initWithRequest:myRequest];
    __weak AFHTTPRequestOperation *operation = _operation;
    __block NSString *responseString = [NSString stringWithString:@""];

    [operation  setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        responseString = [operation responseString];

        id retObj = [responseString JSONValue];

        // Check for invalid response (No Access)
        if ([retObj isKindOfClass:[NSDictionary class]]) {
            if ([[(NSDictionary *)retObj valueForKey:@"Message"] isEqualToString:@"No Access"]) {
                block(nil);
                [self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
            }
        } else if ([retObj isKindOfClass:[NSArray class]]) {
            if ([(NSArray *)retObj count] > 0) {
                NSDictionary *dict = [(NSArray *)retObj objectAtIndex:0];
                if ([[dict valueForKey:@"Message"] isEqualToString:@"No Access"]) {
                    block(nil);
                    [self handleNoAccessWithReason:[(NSDictionary *)retObj valueForKey:@"Reason"]];
                }
            }
        }
        block(retObj);


    } 
                                      failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                          NSLog(@"Failed with error = %@", [NSString stringWithFormat:@"[Error]:%@",error]);
                                          block(nil);
//                                          if (alertUserOnFailure) {
//                                              // Let the user know something went wrong
//                                              [self handleNetworkErrorWithError:operation.error];
//                                          }

                                      }];

    [operation start];


}


#pragma mark - Error and Access Handling
+(void)handleNetworkErrorWithError:(NSError *)error {
    NSString *errorString = [NSString stringWithFormat:@"[Error]:%@",error];

    // Standard UIAlert Syntax
    UIAlertView *myAlert = [[UIAlertView alloc] 
                            initWithTitle:@"Connection Error" 
                            message:errorString 
                            delegate:nil 
                            cancelButtonTitle:@"OK" 
                            otherButtonTitles:nil, nil];

    [myAlert show];

}

+(void)handleNoAccessWithReason:(NSString *)reason {
    // Standard UIAlert Syntax
    UIAlertView *myAlert = [[UIAlertView alloc] 
                            initWithTitle:@"No Access" 
                            mess