如何使用 Alamofire 在获取请求中发送 JSON 正文

Question

I'm facing a problem since 3 weeks now, I'm using an API pretty particular which need a JSON object as body in a GET request. And I think that it's the main problem

I tried to custom my encoding with ParameterEncoding thanks the Alamofire documentation and all the help provide in Stack Overflow and still no success.

When I make my request with Postman or with curl in my terminal, there is no problem but when I develop in swift with Alamofire, I get an internal error 500 or nothing passed in my response (when I set my parameter in my request function with the keyword encoding: JSONEncoding.default).

Here is the curl exemple:

curl -X GET https://blih.epitech.eu/user/repositories -H 'Content-Type: application/json' -d '{"user": account, "signature": password}'

Here is the sample of my code:

/// swift 5
let userString = #"{"user":"\#(account)","signature":"\#(signaturePassword)"}"#
let urlString = "https://blih.epitech.eu/repositories"

Alamofire.request(urlString, method: .get, parameters: [:], encoding: JSONStringArrayEncoding.init(string: userString), headers: nil)
    .responseJSON { (response) in
        debugPrint(response)
}

The 'JSONStringArrayEncoding' is a structure with my Custom Encoding:

struct JSONStringArrayEncoding: ParameterEncoding {
    private let myString: String

    init(string: String) {
        self.myString = string
    }

    func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
        var urlRequest = try urlRequest.asURLRequest()

        let data = Data(myString.utf8)

        if urlRequest.value(forHTTPHeaderField: "Content-Type") == nil {
            urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
        }

        urlRequest.httpBody = data

        return urlRequest
    }
}

I expect to have a json Array when the request is successsful:

{
"message": "Listing successful",
    "repositories": {
        "aaaa": {
            "uuid": "e3a6bea1-c581-5fde-a3a8",
            "url": "https://blih.epitech.eu/repository/aaa"
        }
    }
}

But I get an internal error 500.

Thank you in advance for your help.

Answer 1

Just replace JSON.encoding -> URLEncoding

Alamofire.request(path,method: .get, parameters: params, encoding: URLEncoding.default, headers: nil)

Answer 2

As you have mentioned that, your request is working using postman or curl in terminal. Below is the result I'm getting

As pointed by @Glenn, result of visiting browser with url blih.epitech.eu/user/repositories show result like below

I believe, there is something wrong with the url you're requesting to.

EDITED:

See the below image to see the why it is working with curl

Try your request as post once and add content-type = application/x-www-form-urlencoded I am not sure but it might help.

Answer 3

Try this:

let url = "https://blih.epitech.eu/user/repositories"
let param = ["user":"asdfdsf",
    "signature":"password"]
if let jsonData = try? JSONEncoder().encode(param) {

    var request = URLRequest(url: URL(string: url)!)
    request.httpMethod = HTTPMethod.post.rawValue
    request.setValue("application/json; charset=UTF-8", forHTTPHeaderField: "Content-Type")
    request.httpBody = jsonData

    Alamofire.request(request).responseJSON {
        (response) in
        debugPrint(response)
    }
}

OUTPUT:

{ error = "Bad token"; }