How can I do an HTTP Post before reading the JSON? - ios

Question

I am reading JSON from a URL and that has been working correctly. This is my code:
#IBOutlet weak var ProfilesCell: UITableView!
let cellspacing: CGFloat = 50
var names = [String]()
var posts = [String]()
var locations = [String]()
var votes = [String]()
var comments = [String]()
override func viewDidLoad() {
super.viewDidLoad()
ProfilesCell.dataSource = self
let url:URL = URL(string: "http://"+Connection_String+":8000/profile_view")!
URLSession.shared.dataTask(with:url, completionHandler: {(data, response, error) in
if error != nil {
print(error)
} else {
do {
let parsedData = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String:Any]
if let Profile = parsedData["Profile"] as! [AnyObject]?
{
for Stream in Profile {
if let fullname = Stream["fullname"] as? String {
self.names.append(fullname)
}
if let post = Stream["post"] as? String {
self.posts.append(post)
}
if let location = Stream["location"] as? String {
self.locations.append(location)
}
if let vote = Stream["votes"] as? String {
self.votes.append(vote.appending(" Votes"))
}
if let comment = Stream["comments"] as? String {
self.comments.append(comment.appending(" Comments"))
}
DispatchQueue.main.async {
self.ProfilesCell.reloadData()
}
}
}
} catch let error as NSError {
print(error)
}
}
}).resume()
}
That code above correctly parses the JSON and the data is returned to the TableView. I now want to do an HTTP Post before reading that JSON and the parameter name is profile_id and I know that is something wrong in my code because if I do an HTML form with the parameter, things work correctly.
This is the new code that I now have:
#IBOutlet weak var ProfilesCell: UITableView!
let cellspacing: CGFloat = 50
var names = [String]()
var posts = [String]()
var locations = [String]()
var votes = [String]()
var comments = [String]()
override func viewDidLoad() {
super.viewDidLoad()
ProfilesCell.dataSource = self
let url:URL = URL(string: "http://"+Connection_String+":8000/profile_view")!
let ss = "32"
var request = URLRequest(url:url)
let paramString = "profile_id=\(ss)"
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
request.httpBody = paramString.data(using: .utf8)
URLSession.shared.dataTask(with:url, completionHandler: {(data, response, error) in
if error != nil {
print(error)
} else {
do {
let parsedData = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String:Any]
if let Profile = parsedData["Profile"] as! [AnyObject]?
{
for Stream in Profile {
if let fullname = Stream["fullname"] as? String {
self.names.append(fullname)
}
if let post = Stream["post"] as? String {
self.posts.append(post)
}
if let location = Stream["location"] as? String {
self.locations.append(location)
}
if let vote = Stream["votes"] as? String {
self.votes.append(vote.appending(" Votes"))
}
if let comment = Stream["comments"] as? String {
self.comments.append(comment.appending(" Comments"))
}
DispatchQueue.main.async {
self.ProfilesCell.reloadData()
}
}
}
} catch let error as NSError {
print(error)
}
}
}).resume()
}
Now with this extra code the URL is still being hit but profile_id is showing null even though I have hardcoded the number 32. I also get this message displayed:
Error Domain=NSCocoaErrorDomain Code=3840 "No value." UserInfo={NSDebugDescription=No value.}