Laravel 4.2 Trying to authorize User using post method - php

Question

i am trying to make a post request to authorize user.
This is my route.php
Route::post('/user/login', 'OwnerController#login');
Here my login method:
$login_by = Input::get('login_by');
$device_token = Input::get('device_token');
$device_type = Input::get('device_type');
if (Input::has('email') && Input::has('password')) {
$email = Input::get('email');
$password = Input::get('password');
$validator = Validator::make(
array(
'password' => $password,
'email' => $email,
'device_token' => $device_token,
'device_type' => $device_type,
'login_by' => $login_by
), array(
'password' => 'required',
'email' => 'required|email',
'device_token' => 'required',
'device_type' => 'required|in:android,ios',
'login_by' => 'required|in:manual,facebook,google'
)
);
if ($validator->fails()) {
$error_messages = $validator->messages()->all();
$response_array = array('success' => false, 'error' => 'Invalid Input', 'error_code' => 401, 'error_messages' => $error_messages);
$response_code = 200;
Log::error('Validation error during manual login for owner = ' . print_r($error_messages, true));
} else {
if ($owner = Owner::where('email', '=', $email)->first()) {
if (Hash::check($password, $owner->password)) {
if ($login_by !== "manual") {
$response_array = array('success' => false, 'error' => 'Login by mismatch', 'error_code' => 417);
$response_code = 200;
} else {
if ($owner->device_type != $device_type) {
$owner->device_type = $device_type;
}
if ($owner->device_token != $device_token) {
$owner->device_token = $device_token;
}
$owner->token = generate_token();
$owner->token_expiry = generate_expiry();
$owner->save();
/* SEND REFERRAL & PROMO INFO */
$settings = Settings::where('key', 'referral_code_activation')->first();
$referral_code_activation = $settings->value;
if ($referral_code_activation) {
$referral_code_activation_txt = "referral on";
} else {
$referral_code_activation_txt = "referral off";
}
$settings = Settings::where('key', 'promotional_code_activation')->first();
$promotional_code_activation = $settings->value;
if ($promotional_code_activation) {
$promotional_code_activation_txt = "promo on";
} else {
$promotional_code_activation_txt = "promo off";
}
/* SEND REFERRAL & PROMO INFO */
$code_data = Ledger::where('owner_id', '=', $owner->id)->first();
$response_array = array(
'success' => true,
'id' => $owner->id,
'first_name' => $owner->first_name,
'last_name' => $owner->last_name,
'phone' => $owner->phone,
'email' => $owner->email,
'picture' => $owner->picture,
'bio' => $owner->bio,
'address' => $owner->address,
'state' => $owner->state,
'country' => $owner->country,
'zipcode' => $owner->zipcode,
'login_by' => $owner->login_by,
'social_unique_id' => $owner->social_unique_id,
'device_token' => $owner->device_token,
'device_type' => $owner->device_type,
'timezone' => $owner->timezone,
'token' => $owner->token,
'referral_code' => $code_data->referral_code,
'is_referee' => $owner->is_referee,
'promo_count' => $owner->promo_count,
'is_referral_active' => $referral_code_activation,
'is_referral_active_txt' => $referral_code_activation_txt,
'is_promo_active' => $promotional_code_activation,
'is_promo_active_txt' => $promotional_code_activation_txt,
);
$dog = Dog::find($owner->dog_id);
if ($dog !== NULL) {
$response_array = array_merge($response_array, array(
'dog_id' => $dog->id,
'age' => $dog->age,
'name' => $dog->name,
'breed' => $dog->breed,
'likes' => $dog->likes,
'image_url' => $dog->image_url,
));
}
$response_code = 200;
}
} else {
$response_array = array('success' => false, 'error' => 'Invalid Username and Password', 'error_code' => 403);
$response_code = 200;
}
} else {
$response_array = array('success' => false, 'error' => 'Not a Registered User', 'error_code' => 404);
$response_code = 200;
}
}
return Response::make(json_encode($response_array,JSON_PRETTY_PRINT))->header('Content-Type', "application/json");
but when i tried to access this url from my ios project using AFNETWORKING: Login Link Localhost
I got this error:
URL: http://192.168.1.26/uberx/public/user/login } { status code:
500, headers {
"Cache-Control" = "no-cache";
Connection = close;
"Content-Length" = 4390;
"Content-Type" = "text/html; charset=UTF-8";
Date = "Mon, 08 Feb 2016 09:04:56 GMT";
Server = "Apache/2.4.17 (Win32) OpenSSL/1.0.2d PHP/5.6.14";
"Set-Cookie" = "laravel_session=eyJpdiI6Iis2VnVUN2JWQW9uMEFkcTBkUkJtNWc9PSIsInZhbHVlIjoiVVpMeW1KbkRMblA2K1hSNGpBSHpHaHNhNGt2a3hab1BaNmdPVVQ3NDVlaFBOZnFUM3QrdjR3dWlQUFwvTFZIa3VkT0ZUcldiYUxqNmE1QXNlT3hjRjB3PT0iLCJtYWMiOiIwOTJjZjlkMWVlZjg5NzQ3ZmY3MDA1YjBlYjdhN2U4MmE3M2I5YzUwMDU0Y2E4ZmFlMTkyNzVkZWI2ZDI0MTBmIn0%3D;
expires=Mon, 08-Feb-2016 11:04:57 GMT; Max-Age=7200; path=/;
httponly";
"X-Powered-By" = "PHP/5.6.14"; } }, NSLocalizedDescription=Request failed: unacceptable content-type: text/html}}} 2016-02-08
14:34:43.948 Upper[23084:6636866] Login Response ---> (null)
Is there any specific way to make a webservice like method and print json ? Is there a problem in IOS call or in Web output?
Thanks