How to add header in Multipart Form data request iOS? - ios

Question

Following is my code snippet. I am getting an error while runnning this code. I have added headers as part of the request. Is that the correct way ?
__block int i=1;
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:url]];
NSDictionary *parameters = #{#"wave_Id": [inputDictionary objectForKey:#"wave_Id"]};
AFHTTPRequestOperation *op = [manager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
for(NSData *imageData in [inputDictionary objectForKey:#"images"])
{
[formData appendPartWithFileData:imageData name:[NSString stringWithFormat:#"file%d",i] fileName:[NSString stringWithFormat:#"abc%d.png",i] mimeType:#"image/png"];
i++;
}
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:&error];
NSAssert(jsonData, #"Failure building JSON: %#", error);
NSLog(#"Json Data Image Upload %#",jsonData);
NSAssert(jsonData, #"Failure building JSON: %#", error);
NSString *token = [SSKeychain passwordForService:RegistrationTokenKey account:LoggedInUserKey];
NSDictionary *jsonHeaders = #{#"Content-Disposition" : #"form-data; name=\"parameters\"",
#"Content-Type" : #"application/json",
#"Accept" : #"application/json",
#"Authorization" : token};
[formData appendPartWithHeaders:jsonHeaders body:jsonData];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Success: %# ***** %#", operation.responseString, responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %# ***** %#", operation.responseString, error);
}];
[op start];

Answer 1

I need your complete method to be 100% sure, but please try writing this way and see if it helps:
__block int i = 1;
NSMutableArray *mutableOperations = [NSMutableArray array];
NSDictionary *parameters = #{#"wave_Id": [inputDictionary objectForKey:#"wave_Id"]};
for (NSData *imageData in [inputDictionary objectForKey:#"images"]) {
NSURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:#"POST"
URLString:url
parameters:parameters
constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData
name:[NSString stringWithFormat:#"file%d",i]
fileName:[NSString stringWithFormat:#"abc%d.png",i]
mimeType:#"image/png"];
i++;
}
error:nil];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[mutableOperations addObject:operation];
}
NSArray *operations = [AFURLConnectionOperation batchOfRequestOperations:mutableOperations progressBlock:^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {
NSLog(#"%lu of %lu images uploaded!", numberOfFinishedOperations, totalNumberOfOperations);
} completionBlock:^(NSArray *operations) {
NSLog(#"All images have been uploade!");
}];
[[NSOperationQueue mainQueue] addOperations:operations waitUntilFinished:NO];

Answer 2

Actually I modified the same code and its working now. Changed the "Content-Type" to "multipart/form-data".
Also added the key (parameter name) for my imagesArray in the API request to the following method
"formData appendPartWithFileData:imageData name:#"yourKey"..."
if (_isUploadImage) {
__block int i=1;
AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:url]];
[manager.requestSerializer setValue:#"multipart/form-data" forHTTPHeaderField:#"Content-Type"];
[manager.requestSerializer setValue:#"application/json" forHTTPHeaderField:#"Accept"];
if (_shouldBeInHeader) {
NSString *token = [SSKeychain passwordForService:RegistrationTokenKey account:LoggedInUserKey];
[manager.requestSerializer setValue:[NSString stringWithFormat:#"Token %#",token] forHTTPHeaderField:#"Authorization"];
}
NSDictionary *parameters = #{#"wave_id": [inputDictionary objectForKey:#"wave_id"]};
AFHTTPRequestOperation *op = [manager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
for (NSData *imageData in [inputDictionary objectForKey:#"images"])
{
[formData appendPartWithFileData:imageData name:[NSString stringWithFormat:#"images"] fileName:[NSString stringWithFormat:#"abc%d.png",i] mimeType:#"image/png"];
i++;
}
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Success");
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Failed");
}];
[op start];
}