Update: Solution found. You can read it at the end of the post.
I'm trying to perform a POST request to a remote REST API using NSURLSession. The idea is to make a request with two parameters: deviceId and textContent.
The problem is that those parameters are not recognized by the server. The server part works correctly because I've sent a POST using POSTMAN for Google Chrome and it worked perfectly.
This is the code I'm using right now:
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"New note";
NSString *noteDataString = [NSString stringWithFormat:@"deviceId=%@&textContent=%@", deviceID, textContent];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @{
@"api-key" : @"API_KEY",
@"Content-Type" : @"application/json"
};
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPBody = [noteDataString dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPMethod = @"POST";
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// The server answers with an error because it doesn't receive the params
}];
[postDataTask resume];
I've tried the same procedure with a NSURLSessionUploadTask:
// ...
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:request fromData:[noteDataString dataUsingEncoding:NSUTF8StringEncoding] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// The server answers with an error because it doesn't receive the params
}];
[uploadTask resume];
Any ideas?
The problem with my approach was that I was sending the incorrect Content-Type header with all my requests. So the only change needed for the code to work correctly is to remove the Content-Type = application/json HTTP header. So the correct code would be this:
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"New note";
NSString *noteDataString = [NSString stringWithFormat:@"deviceId=%@&textContent=%@", deviceID, textContent];
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @{
@"api-key" : @"API_KEY"
};
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];
NSURL *url = [NSURL URLWithString:@"http://url_to_manage_post_requests"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPBody = [noteDataString dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPMethod = @"POST";
NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// The server answers with an error because it doesn't receive the params
}];
[postDataTask resume];
If you need to post images along with other parameters using NSURLSession here you have an example:
NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
NSString *textContent = @"This is a new note";
// Build the request body
NSString *boundary = @"SportuondoFormBoundary";
NSMutableData *body = [NSMutableData data];
// Body part for "deviceId" parameter. This is a string.
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"deviceId"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", deviceID] dataUsingEncoding:NSUTF8StringEncoding]];
// Body part for "textContent" parameter. This is a string.
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"textContent"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", textContent] dataUsingEncoding:NSUTF8StringEncoding]];
// Body part for the attachament. This is an image.
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"ranking"], 0.6);
if (imageData) {
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", @"image"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// Setup the session
NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfiguration.HTTPAdditionalHeaders = @{
@"api-key" : @"55e76dc4bbae25b066cb",
@"Accept" : @"application/json",
@"Content-Type" : [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary]
};
// Create the session
// We can use the delegate to track upload progress
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration delegate:self delegateQueue:nil];
// Data uploading task. We could use NSURLSessionUploadTask instead of NSURLSessionDataTask if we needed to support uploads in the background
NSURL *url = [NSURL URLWithString:@"URL_TO_UPLOAD_TO"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = body;
NSURLSessionDataTask *uploadTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// Process the response
}];
[uploadTask resume];
This question is related to
ios
objective-c
nsurlsession
Sometimes I have been getting some errors when you want to pass httpBody serialized to Data from Dictionary, which on most cases is due to the wrong encoding or malformed data due to non NSCoding conforming objects in the Dictionary.
Depending on your requirements one easy solution would be to create a String instead of Dictionary and convert it to Data. You have the code samples below written on Objective-C and Swift 3.0.
// Create the URLSession on the default configuration
NSURLSessionConfiguration *defaultSessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultSessionConfiguration];
// Setup the request with URL
NSURL *url = [NSURL URLWithString:@"yourURL"];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
// Convert POST string parameters to data using UTF8 Encoding
NSString *postParams = @"api_key=APIKEY&[email protected]&password=password";
NSData *postData = [postParams dataUsingEncoding:NSUTF8StringEncoding];
// Convert POST string parameters to data using UTF8 Encoding
[urlRequest setHTTPMethod:@"POST"];
[urlRequest setHTTPBody:postData];
// Create dataTask
NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
// Handle your response here
}];
// Fire the request
[dataTask resume];
// Create the URLSession on the default configuration
let defaultSessionConfiguration = URLSessionConfiguration.default
let defaultSession = URLSession(configuration: defaultSessionConfiguration)
// Setup the request with URL
let url = URL(string: "yourURL")
var urlRequest = URLRequest(url: url!) // Note: This is a demo, that's why I use implicitly unwrapped optional
// Convert POST string parameters to data using UTF8 Encoding
let postParams = "api_key=APIKEY&[email protected]&password=password"
let postData = postParams.data(using: .utf8)
// Set the httpMethod and assign httpBody
urlRequest.httpMethod = "POST"
urlRequest.httpBody = postData
// Create dataTask
let dataTask = defaultSession.dataTask(with: urlRequest) { (data, response, error) in
// Handle your response here
}
// Fire the request
dataTask.resume()
Swift 2.0 solution is here:
let urlStr = “http://url_to_manage_post_requests”
let url = NSURL(string: urlStr)
let request: NSMutableURLRequest =
NSMutableURLRequest(URL: url!) request.HTTPMethod = "POST"
request.setValue(“application/json” forHTTPHeaderField:”Content-Type”)
request.timeoutInterval = 60.0
//additional headers
request.setValue(“deviceIDValue”, forHTTPHeaderField:”DeviceId”)
let bodyStr = “string or data to add to body of request”
let bodyData = bodyStr.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
request.HTTPBody = bodyData
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request){
(data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
if let httpResponse = response as? NSHTTPURLResponse {
print("responseCode \(httpResponse.statusCode)")
}
if error != nil {
// You can handle error response here
print("\(error)")
}else {
//Converting response to collection formate (array or dictionary)
do{
let jsonResult: AnyObject = (try NSJSONSerialization.JSONObjectWithData(data!, options:
NSJSONReadingOptions.MutableContainers))
//success code
}catch{
//failure code
}
}
}
task.resume()
You can use https://github.com/mxcl/OMGHTTPURLRQ
id config = [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:someID];
id session = [NSURLSession sessionWithConfiguration:config delegate:someObject delegateQueue:[NSOperationQueue new]];
OMGMultipartFormData *multipartFormData = [OMGMultipartFormData new];
[multipartFormData addFile:data1 parameterName:@"file1" filename:@"myimage1.png" contentType:@"image/png"];
NSURLRequest *rq = [OMGHTTPURLRQ POST:url:multipartFormData];
id path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"upload.NSData"];
[rq.HTTPBody writeToFile:path atomically:YES];
[[session uploadTaskWithRequest:rq fromFile:[NSURL fileURLWithPath:path]] resume];
use like this.....
Create file
#import <Foundation/Foundation.h>`
#import "SharedManager.h"
#import "Constant.h"
#import "UserDetails.h"
@interface APISession : NSURLSession<NSURLSessionDelegate>
@property (nonatomic, retain) NSMutableData *responseData;
+(void)postRequetsWithParam:(NSMutableDictionary* )objDic withAPIName:(NSString*
)strAPIURL completionHandler:(void (^)(id result, BOOL status))completionHandler;
@end
****************.m*************************
#import "APISession.h"
#import <UIKit/UIKit.h>
@implementation APISession
+(void)postRequetsWithParam:(NSMutableDictionary *)objDic withAPIName:(NSString
*)strAPIURL completionHandler:(void (^)(id, BOOL))completionHandler
{
NSURL *url=[NSURL URLWithString:strAPIURL];
NSMutableURLRequest *request=[[NSMutableURLRequest alloc]initWithURL:url];
[request setHTTPMethod:@"POST"];
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
NSError *err = nil;
NSData *data=[NSJSONSerialization dataWithJSONObject:objDic options:NSJSONWritingPrettyPrinted error:&err];
[request setHTTPBody:data];
NSString *strJsonFormat = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"API URL: %@ \t Api Request Parameter ::::::::::::::%@",url,strJsonFormat);
// NSLog(@"Request data===%@",objDic);
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];
// NSURLSession *session=[NSURLSession sharedSession];
NSURLSessionTask *task=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error)
{
if (error==nil) {
NSDictionary *dicData=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];\
NSLog(@"Response Data=============%@",dicData);
if([[dicData valueForKey:@"tokenExpired"]integerValue] == 1)
{
NSLog(@"hello");
NSDictionary *dict = [NSDictionary dictionaryWithObject:@"Access Token Expire." forKey:@"message"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"UserLogOut" object:self userInfo:dict];
}
dispatch_async(dispatch_get_main_queue(), ^{
completionHandler(dicData,(error == nil));
});
NSLog(@"%@",dicData);
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
completionHandler(error.localizedDescription,NO);
});
}
}];
// dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[task resume];
// });
}
@end
*****************************in .your view controller***********
#import "file"
txtEmail.text = [txtEmail.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
{
[SVProgressHUD showWithStatus:@"Loading..."];
[SVProgressHUD setDefaultMaskType:SVProgressHUDMaskTypeGradient];
NSMutableDictionary *objLoginDic=[[NSMutableDictionary alloc] init];
[objLoginDic setValue:txtEmail.text forKey:@"email"];
[objLoginDic setValue:@0 forKey:kDeviceType];
[objLoginDic setValue:txtPassword.text forKey:kPassword];
[objLoginDic setValue:@"376545432" forKey:kDeviceTokan];
[objLoginDic setValue:@"" forKey:kcountryId];
[objLoginDic setValue:@"" forKey:kfbAccessToken];
[objLoginDic setValue:@0 forKey:kloginType];
[APISession postRequetsWithParam:objLoginDic withAPIName:KLOGIN_URL completionHandler:^(id result, BOOL status) {
[SVProgressHUD dismiss];
NSInteger statusResponse=[[result valueForKey:kStatus] integerValue];
NSString *strMessage=[result valueForKey:KMessage];
if (status) {
if (statusResponse == 1)
{
UserDetails *objLoginUserDetail=[[UserDetails alloc]
initWithObject:[result valueForKey:@"userDetails"]];
[[NSUserDefaults standardUserDefaults]
setObject:@(objLoginUserDetail.userId) forKey:@"user_id"];
[[NSUserDefaults standardUserDefaults] synchronize];
[self clearTextfeilds];
HomeScreen *obj=[Kiran_Storyboard instantiateViewControllerWithIdentifier:@"HomeScreen"];
[self.navigationController pushViewController:obj animated:YES];
}
else{
[strMessage showAsAlert:self];
}
}
}];
}
**********use model class for represnt data*************
#import <Foundation/Foundation.h>
#import "Constant.h"
#import <objc/runtime.h>
@interface UserDetails : NSObject
@property(strong,nonatomic) NSString *emailId,
*deviceToken,
*countryId,
*fbAccessToken,
*accessToken,
*countryName,
*isProfileSetup,
*profilePic,
*firstName,
*lastName,
*password;
@property (assign) NSInteger userId,deviceType,loginType;
-(id)initWithObject :(NSDictionary *)dicUserData;
-(void)saveLoginUserDetail;
+(UserDetails *)getLoginUserDetail;
-(UserDetails *)getEmptyModel;
- (NSArray *)allPropertyNames;
-(void)printDescription;
-(NSMutableDictionary *)getDictionary;
@end
******************model.m*************
#import "UserDetails.h"
#import "SharedManager.h"
@implementation UserDetails
-(id)initWithObject :(NSDictionary *)dicUserData
{
self = [[UserDetails alloc] init];
if (self)
{
@try {
[self setFirstName:([dicUserData valueForKey:@"firstName"] != [NSNull null])?
[dicUserData valueForKey:@"firstName"]:@""];
[self setUserId:([dicUserData valueForKey:kUserId] != [NSNull null])?
[[dicUserData valueForKey:kUserId] integerValue]:0];
}
@catch (NSException *exception) {
NSLog(@"Exception: %@",exception.description);
}
@finally {
}
}
return self;
}
-(UserDetails *)getEmptyModel{
[self setFirstName:@""];
[self setLastName:@""];
[self setDeviceType:0];
return self;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
// Encode properties, other class variables, etc
[encoder encodeObject:_firstName forKey:kFirstName];
[encoder encodeObject:[NSNumber numberWithInteger:_deviceType] forKey:kDeviceType];
}
- (id)initWithCoder:(NSCoder *)decoder {
if((self = [super init])) {
_firstName = [decoder decodeObjectForKey:kEmailId];
_deviceType= [[decoder decodeObjectForKey:kDeviceType] integerValue];
}
return self;
}
- (NSArray *)allPropertyNames
{
unsigned count;
objc_property_t *properties = class_copyPropertyList([self class], &count);
NSMutableArray *rv = [NSMutableArray array];
unsigned i;
for (i = 0; i < count; i++)
{
objc_property_t property = properties[i];
NSString *name = [NSString stringWithUTF8String:property_getName(property)];
[rv addObject:name];
}
free(properties);
return rv;
}
-(void)printDescription{
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
for(NSString *key in [self allPropertyNames])
{
[dic setValue:[self valueForKey:key] forKey:key];
}
NSLog(@"\n========================= User Detail ==============================\n");
NSLog(@"%@",[dic description]);
NSLog(@"\n=============================================================\n");
}
-(NSMutableDictionary *)getDictionary{
NSMutableDictionary *dic = [[NSMutableDictionary alloc] init];
for(NSString *key in [self allPropertyNames])
{
[dic setValue:[self valueForKey:key] forKey:key];
}
return dic;
}
#pragma mark
#pragma mark - Save and get User details
-(void)saveLoginUserDetail{
NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:self];
[Shared_UserDefault setObject:encodedObject forKey:kUserDefault_SavedUserDetail];
[Shared_UserDefault synchronize];
}
+(UserDetails *)getLoginUserDetail{
NSData *encodedObject = [Shared_UserDefault objectForKey:kUserDefault_SavedUserDetail];
UserDetails *object = [NSKeyedUnarchiver unarchiveObjectWithData:encodedObject];
return object;
}
@end
************************usefull code while add data into model and get data********
NSLog(@"Response %@",result);
NSString *strMessg = [result objectForKey:kMessage];
NSString *status = [NSString stringWithFormat:@"%@",[result
objectForKey:kStatus]];
if([status isEqualToString:@"1"])
{
arryBankList =[[NSMutableArray alloc]init];
NSMutableArray *arrEvents=[result valueForKey:kbankList];
ShareOBJ.isDefaultBank = [result valueForKey:kisDefaultBank];
if ([arrEvents count]>0)
{
for (NSMutableArray *dic in arrEvents)
{
BankList *objBankListDetail =[[BankList alloc]initWithObject:[dic
mutableCopy]];
[arryBankList addObject:objBankListDetail];
}
//display data using model...
BankList *objBankListing =[arryBankList objectAtIndex:indexPath.row];
Teja Kumar Bethina's code changed for Swift 3:
let urlStr = "http://url_to_manage_post_requests"
let url = URL(string: urlStr)
var request: URLRequest = URLRequest(url: url!)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField:"Content-Type")
request.timeoutInterval = 60.0
//additional headers
request.setValue("deviceIDValue", forHTTPHeaderField:"DeviceId")
let bodyStr = "string or data to add to body of request"
let bodyData = bodyStr.data(using: String.Encoding.utf8, allowLossyConversion: true)
request.httpBody = bodyData
let task = URLSession.shared.dataTask(with: request) {
(data: Data?, response: URLResponse?, error: Error?) -> Void in
if let httpResponse = response as? HTTPURLResponse {
print("responseCode \(httpResponse.statusCode)")
}
if error != nil {
// You can handle error response here
print("\(error)")
} else {
//Converting response to collection formate (array or dictionary)
do {
let jsonResult = (try JSONSerialization.jsonObject(with: data!, options:
JSONSerialization.ReadingOptions.mutableContainers))
//success code
} catch {
//failure code
}
}
}
task.resume()
If you are using Swift, the Just library does this for you. Example from it's readme file:
// talk to registration end point
Just.post(
"http://justiceleauge.org/member/register",
data: ["username": "barryallen", "password":"ReverseF1ashSucks"],
files: ["profile_photo": .URL(fileURLWithPath:"flash.jpeg", nil)]
) { (r)
if (r.ok) { /* success! */ }
}
Source: Stackoverflow.com