upload image with multipart/form-data objective C - ios

Question

I'm new iOS developer. I want upload image with multipart/form-data, this is my obj C code, I get it from postman. And the picture are request parameters of API. I test in postman It work fine, but I test in mobile It's not working and get HTTP 500 error, please check it for me. thanks all. picture API request parameters
strURL = [NSString stringWithFormat:#"%#%#",URL,strURL];
NSArray *parameters = #[ #{ #"name": #"imageInfo", #"value": #"{\"user\":{\"userId\":\"165\"},\"description\":\"test description\",\"competitionId\":\"1\",\"speciesId\":\"13\",\"lng\":\"107.9296875\",\"lat\":\"15.83453574122155\",\"locationName\":\"Đại Lãnh, Đại Lộc, Quảng Nam, Vietnam\",\"originalImageName\":\"\"}" },
#{ #"name": #"filenames", #"value": #"{}" },
#{ #"name": #"files", #"fileName": (UIImageJPEGRepresentation(uploadImage, 0.1)) } ];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:strURL] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.0];
NSString *boundary = #"---011000010111000001101001";
NSDictionary *headers = #{ #"content-type": #"multipart/form-data; boundary=---011000010111000001101001",
#"cache-control": #"no-cache",
#"postman-token": #"463bcf06-08f6-7611-c1fb-13b0dde79c5c"};
NSError *error;
NSMutableString *body = [NSMutableString string];
for (NSDictionary *param in parameters) {
[body appendFormat:#"\r\n--%#\r\n", boundary];
if (param[#"fileName"]) {
[body appendFormat:#"Content-Disposition:form-data; name=\"%#\"; filename=\"%#\"\r\n", param[#"name"], #"yourimage.jpg"];
[body appendFormat:#"Content-Type: image/jpeg\r\n\r\n"];
[body appendFormat:#"%#", param[#"fileName"]];
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:NSUTF8StringEncoding];
[request setHTTPMethod:#"POST"];
[request setAllHTTPHeaderFields:headers];
[request setHTTPBody:postData];
NSURLResponse *response;
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];

Answer 1

You can use AFNetworking third party class.
Reference : https://github.com/AFNetworking/AFNetworking
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:#"POST" URLString:#"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileURL:[NSURL fileURLWithPath:#"file://path/to/image.jpg"] name:#"file" fileName:#"filename.jpg" mimeType:#"image/jpeg" error:nil];
} error:nil];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSURLSessionUploadTask *uploadTask;
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(), ^{
//Update the progress view
[progressView setProgress:uploadProgress.fractionCompleted];
});
}
completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
if (error) {
NSLog(#"Error: %#", error);
} else {
NSLog(#"%# %#", response, responseObject);
}
}];
[uploadTask resume];