Pass array in HTTP request body

Question

I want to pass array like this in my request:

{
"ids": ["5ed7603ab05efe0004286d19", "5ed7608ab05efe0004286d1a"]
}

I did like that but I am not sure the server is getting as I intended:

    request.httpBody = try JSONSerialization.data(withJSONObject: ids, options: .prettyPrinted)

Frankenstein · Accepted Answer · 2020-06-06 10:37:10Z

1

You should be using a Dictionary for this purpose. Here's how:

let dictionary = ["ids": ["5ed7603ab05efe0004286d19", "5ed7608ab05efe0004286d1a"]]
request.httpBody = try JSONSerialization.data(withJSONObject: dictionary, options: .prettyPrinted)

Suggestion: The modern approach would be to use JSONEncoder(). You could google this, there are plenty of solutions online. If you're still struggling you can ask for the method in the comments, I'll help you figure out.

Update: How you can implement Swift's JSONEncoder API in your code.

let dictionary = ["ids": ["5ed7603ab05efe0004286d19", "5ed7608ab05efe0004286d1a"]]
request.httpBody = try JSONEncoder().encode(dictionary)

Using a struct would be much safer. Here's how:

typealias ID = String
struct MyRequestModel: Codable { var ids: [ID] }

let myRequestModel = MyRequestModel(ids: ["5ed7603ab05efe0004286d19", "5ed7608ab05efe0004286d1a"])
request.httpBody   = try JSONEncoder().encode(myRequestModel)

Note: Usage of type-alias is optional it just adds a bit of readability to your code, as is the usage of JSONDecoder.

edited Jun 6, 2020 at 10:37

answered Jun 5, 2020 at 17:55

Frankenstein

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3 Comments

Larme Over a year ago

Note: .prettyPrinted shouldn't be useful. This adds unnecessary info that is useful only for the human brain.

Frankenstein Over a year ago

Yeah, you're right it's just a pretty visual formatting.

Frankenstein Over a year ago

You're welcome. As you move forward in ios development you should check-out JSONEncoder API as well which is safer and Swifty.

Omer Faruk Ozturk · Accepted Answer · 2020-06-05 18:07:39Z

0

You can encode using JSONEncoder;

let yourList = ["5ed7603ab05efe0004286d19", "5ed7608ab05efe0004286d1a"]

struct DataModel: Encodable {
    var ids: [String]
}

let data = DataModel(ids: yourList)
let encodedData = try! JSONEncoder().encode(data)

// JSON string value
let jsonString = String(data: encodedData, encoding: .utf8)

answered Jun 5, 2020 at 18:07

Omer Faruk Ozturk

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