99 lines
3.7 KiB
Swift
Executable File
99 lines
3.7 KiB
Swift
Executable File
//
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// ResponseMiddleware.swift
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//
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// Copyright © 2017 Peter Zignego. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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public struct ResponseMiddleware: Middleware {
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let token: String
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let response: SKResponse
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public init(token: String, response: SKResponse) {
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self.token = token
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self.response = response
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}
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public func respond(to request: (RequestType, ResponseType)) -> (RequestType, ResponseType) {
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if let respondable = Respondable(request: request.0), respondable.token == token {
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return (request.0, Response(response: response))
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}
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return (request.0, Response(400))
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}
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private struct Respondable {
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let token: String
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init?(request: RequestType) {
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if let webhook = WebhookRequest(request: request), let token = webhook.token {
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self.token = token
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} else if let action = MessageActionRequest(request: request), let token = action.token {
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self.token = token
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} else {
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return nil
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}
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}
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}
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}
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extension WebhookRequest {
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public init?(request: RequestType) {
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guard
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let proto = request.headers.first(where: {$0.name.lowercased() == "x-forwarded-proto"})?.value,
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let host = request.headers.first(where: {$0.name.lowercased() == "host"})?.value
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else {
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return nil
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}
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let requestString = proto + host + request.path + "?" + request.body!
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let components = URLComponents(string: requestString)
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var dict = [String: Any]()
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_ = components?.queryItems.flatMap {$0.map({dict[$0.name]=$0.value})}
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self.init(request: dict)
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}
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}
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extension MessageActionRequest {
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public init?(request: RequestType) {
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guard
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let response = request.formURLEncodedBody.first(where: {$0.name.lowercased() == "payload" })?.value,
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let data = response.data(using: .utf8),
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let json = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any]
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else {
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return nil
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}
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self.init(response: json)
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}
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}
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extension Response {
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public init(response: SKResponse) {
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if response.attachments == nil {
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try! self.init(200, response.text)
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} else if
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let data = try? JSONSerialization.data(withJSONObject: response.json, options: []),
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let body = String(data: data, encoding: .utf8) {
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try! self.init(code: 200, body: body, headers: HTTPHeaders(headers: [Header(name: "content-type", value: "application/json")]))
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} else {
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self.init(400)
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}
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}
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}
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