PUT request using Fetch
lorenalexm opened this issue · comments
I am trying to figure out how to use JSObject.global.fetch.function!
along with JSPromise
to assemble a PUT request with a body and headers. I keep falling flat on my face 😣 I am able to use fetch
and preform GET requests, parse the JSON, and the whole-nine-yards, but I don't understand where to go for sending data.
I have tried assembling a params object using something like this JSObject.construct(from: ["method": "PUT", "body": json.jsString].jsValue)
and passing it as a second parameter to fetch
. Doing this though, when handling the .then
statement I receive an error of:
/Users/lorenalexm/Projects/SwiftScheduleCheck/Sources/SwiftScheduleCheck/Views/ContentView.swift:118:16: Cannot convert value of type '()' to closure result type 'ConvertibleToJSValue'
Might anyone help provide a bit of guidance on how to proceed from here? Thank you!
Here's a snippet for posterity, note that it's slightly inconsistent with the use of Codable
due to #116:
import Foundation
import JavaScriptEventLoop
import JavaScriptKit
JavaScriptEventLoop.installGlobalExecutor()
struct Body: Codable {
let x: Int
let y: String
}
private let jsFetch = JSObject.global.fetch.function!
func fetch(_ url: String, _ options: [String: JSValue]) async throws -> JSValue {
try await JSPromise(jsFetch(url, options).object!)!.value
}
let encoder = JSONEncoder()
let decoder = JSValueDecoder()
func post<Body: Codable>(_ url: String, _ body: Body) async throws -> Body {
let data = try encoder.encode(body)
let response = try await fetch(
url,
[
"method": "POST",
"headers": ["Content-Type": "application/json"].jsValue,
"redirect": "follow",
"body": String(data: data, encoding: .utf8)!.jsValue,
]
).object!
let json = try await JSPromise(response.json!().object!)!.value
return try decoder.decode(Body.self, from: json.object!.json)
}
Also note the use of json.object!.json
, it's a peculiarity of httpbin, which I used to test this. It wraps the response in a top-level JSON structure, having body in the inner json
property. You may need to use json
instance directly with other services instead.
@lorenalexm does that resolve your issue?
@MaxDesiatov I am so sorry for the delay in replying. Thank you so much for the explanation and code snippet, this really helped me work through my issue and build a reusable class for making network requests in my Tokamak projects! Your assistance has helped resolve my problems, thank you again.