Something I'm running into when using Vapor to crawl sites is if I enter a url like http://website(dot)com and it redirects to https://www.website(dot)com, I need to grab that final response URL to know what the final page URL is.
I can do this with URLSession but I'm not seeing something similar in the Vapor client. I tried using the Vapor client and the async-http package it's built on and I can't find the page URL listed in the response.
Any pointers would be appreciated, thank you.
Example getting this info using URLSession
if let url = URL(string: self) {
do {
let(_, response) = try await URLSession.shared.data(from: url)
if let responseURL = response.url {
result = responseURL.description
return result
}
} catch {
}
}
Where this is the first line of the response, and you can easily use response.url to grab the below "URL" value:
<NSHTTPURLResponse: 0x600000210c00> { URL: https://github.com/ } { Status Code: 200, Headers {
Related
I will get straight to the point. Please excuse my english
So there is a website (we can call it X) which offers a service to query and fetch documents etc after logging in with your username / password
I am trying to figure out a way to, basically, provide the same service except natively through the app. The user of the app will still have to enter their username and password and then I make a request to the website and "log" in and then provide the same interface the website does after logging in but the app will be able to save the login information and be able to have some other features that would be beneficial wrt to the documents that it then fetches.
The website does not offer an api (atleast that I know of) I am struggling to figure out how to send the URL request with the username and password.
First I read about using ASAuthenticationServices but that led me to reading that you need the callback url which did not work for me (1. because I can't setup the callback url through the API and 2. because my custom app callback url did not fire)
Then I tried to use a WKWebView to embed a browser and a try to catch the details after the user logged in but still no success.
I have also read that JWT might be the solution considering that it is only a single server authentication needed
This is my code so far, I have stripped it down to basically just show the request I'm making
If anyone could shed some light as to how to perform a simple web login (to basically embed the web service and be able to use it as an app) I would really appreciate it.
Thanks
So this is where I'm at now. I'm trying to form a URLRequest and just checking whether the signin response works, should I be trying to implement a callback in a custom WKWebView ? I'm more kind of asking as to what method I should be using. Should I be researching more into JWT ? or should I be looking at using custom WKWebViews and trying to catch the callback and save the credentials etc through that or do I need to just deconstruct and send custom URLRequests in order to authenticate? thank you
import Combine
import Foundation
final class SignInDummy: ObservableObject {
#Published var username = ""
#Published var password = ""
#Published var hasError = false
#Published var isSigningIn = false
var canSignIn: Bool {
!username.isEmpty && !password.isEmpty
}
func signIn() {
guard !username.isEmpty && !password.isEmpty else {
return
}
let url = URL(string: "https:// URL to website (copy and pasted url of the login page)")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let authData = (username + ":" + password).data(using: .utf8)!.base64EncodedString()
request.addValue("Basic \(authData)", forHTTPHeaderField: "Authorization")
isSigningIn = true
URLSession.shared.dataTask(with: request) { [weak self] data, response, error in
DispatchQueue.main.async {
if error != nil || (response as! HTTPURLResponse).statusCode != 200 {
self?.hasError = true
} else if let data = data {
do {
let signInResponse = try JSONDecoder().decode(SignInResponse.self, from: data)
print(signInResponse)
// TODO: Cache Access Token in Keychain
} catch {
print("Unable to Decode Response \(error)")
print("\(response?.mimeType)")
print("\(response.debugDescription)")
}
}
self?.isSigningIn = false
}
}.resume()
}
fileprivate struct SignInResponse: Decodable {
// MARK: - Properties
let accessToken: String
}
}
When attempting an http request to my rest api, I continually get a 401 error when using the following code. I don not get this error making any other type of request. I have provided the function that makes the request below.
func deleteEvent(id: Int){
eventUrl.append(String(id))
let request = NSMutableURLRequest(url: NSURL(string: eventUrl)! as URL)
request.httpMethod = "DELETE"
print(eventUrl)
eventUrl.removeLast()
print(self.token!)
request.allHTTPHeaderFields = ["Authorization": "Token \(self.token)"]
let task = URLSession.shared.dataTask(with: request as URLRequest) { data, response, error in
if error != nil {
print("error=\(String(describing: error))")
//put variable that triggers error try again view here
return
}
print("response = \(String(describing: response))")
}
task.resume()
}
When sending the delete request with postman, the rest api just returns the data I want to delete but does not delete it. For reference I have posted the view and permissions classes associated with this request Any help understanding why this may be resulting in an error is greatly appreciated!
Views.py
class UserProfileFeedViewSet(viewsets.ModelViewSet):
"""Handles creating, reading and updating profile feed items"""
authentication_classes = (TokenAuthentication,)
serializer_class = serializers.ProfileFeedItemSerializer
queryset = models.ProfileFeedItem.objects.all()
permission_classes = (permissions.UpdateOwnStatus, IsAuthenticated)
def perform_create(self, serializer):
"""Sets the user profile to the logged in user"""
#
serializer.save(user_profile=self.request.user)
Permissions.py
class UpdateOwnStatus(permissions.BasePermission):
"""Allow users to update their own status"""
def has_object_permission(self, request, view, obj):
"""Check the user is trying to update their own status"""
if request.method in permissions.SAFE_METHODS:
return True
return obj.user_profile.id == request.user.id
HEADER SENT WITH DELETE REQUEST VIA POSTMAN
Preface: You leave out too much relevant information from the question for it to be properly answered. Your Swift code looks, and please don't be offended, a bit beginner-ish or as if it had been migrated from Objective-C without much experience.
I don't know why POSTMAN fails, but I see some red flags in the Swift code you might want to look into to figure out why your iOS app fails.
I first noticed that eventUrl seems to be a String property of the type that contains the deleteEvent function. You mutate it by appending the event id, construct a URL from it (weirdly, see below), then mutate it back again. While this in itself is not necessarily wrong, it might open the doors for racing conditions depending how your app works overall.
More importantly: Does your eventUrl end in a "/"? I assume your DELETE endpoint is of the form https://somedomain.com/some/path/<id>, right? Now if eventUrl just contains https://somedomain.com/some/path your code constructs https://somedomain.com/some/path<id>. The last dash is missing, which definitely throws your backend off (how I cannot say, as that depends how the path is resolved in your server app).
It's hard to say what else is going from from the iOS app, but other than this potential pitfall I'd really recommend using proper Swift types where possible. Here's a cleaned up version of your method, hopefully that helps you a bit when debugging:
func deleteEvent(id: Int) {
guard let baseUrl = URL(string: eventUrl), let token = token else {
// add more error handling code here and/or put a breakpoint here to inspect
print("Could not create proper eventUrl or token is nil!")
return
}
let deletionUrl = baseUrl.appendingPathComponent("\(id)")
print("Deletion URL with appended id: \(deletionUrl.absoluteString)")
var request = URLRequest(url: deletionUrl)
request.httpMethod = "DELETE"
print(token) // ensure this is correct
request.allHTTPHeaderFields = ["Authorization": "Token \(token)"]
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if let error = error {
print("Encountered network error: \(error)")
return
}
if let httpResponse = response as? HTTPURLResponse {
// this is basically also debugging code
print("Endpoint responded with status: \(httpResponse.statusCode)")
print(" with headers:\n\(httpResponse.allHeaderFields)")
}
// Debug output of the data:
if let data = data {
let payloadAsSimpleString = String(data: data, encoding: .utf8) ?? "(can't parse payload)"
print("Response contains payload\n\(payloadAsSimpleString)")
}
}
task.resume()
}
This is obviously still limited in terms of error handling, etc., but a little more swifty and contains more console output that will hopefully be helpful.
The last important thing is that you have to ensure iOS does not simply block your request due to Apple Transport Security: Make sure your plist has the expected entries if needed (see also here for a quick intro).
I'm able to load this URL in a safari browser and see the JSON data I need, but this STHTTPRequest is returning null, making me not able to use the JSON, what is going wrong here? I am loading in safari
let url = "192.168.101.1:8080/api"
let request = STHTTPRequest.buildGET(URL(string: url), timeout: 15.0)!
First of all check you are using the latest STHTTPRequest from CocoaPods STHTTPRequest.
Then you can simply use the following to initialise and call a request to the url. The result is obtained through body in completionBlock
guard let request = STHTTPRequest(urlString: url) else {return}
request.timeoutSeconds = TimeInterval(floatLiteral: 15.0)
request.completionBlock = { (headers, body) in
print(body)
}
request.errorBlock = { (error) in
// ...
}
request.startAsynchronous()
needed to add http:// to the beginning of the url, giving http://192.168.101.1:8080/api/status
Currently I have an iOS app that pulls prices and data from websites. So far its been working well, but I want to make it more accurate. To do so, I need to set the cookies for the URL request that I'm currently using String(contentsOf: _) for.
Current Process
let requestUrl: URL = URL(string: "http://www.samsclub.com/sams/search/searchResults.jsp?searchTerm=Apple")!
var content: String?
do {
content = try String(contentsOf: requestUrl)
} catch {
print("Error while converting an NSURL to String: \(error)")
}
if content != "" {
// I do things with the content of the requestUrl...
}
Could Use?
I thought that maybe I should use Alamofire instead to pull those website, and then parse the data.
I need to set the cookie that changes the store number to search, but have been unable to find a way to do so. Bellow is the code I have for pulling the websites data without setting a cookie.
let requestUrl: String = "http://www.samsclub.com/sams/search/searchResults.jsp?searchTerm=Apple"
Alamofire.request(requestUrl, method: .post).responseString { response in
if let content: String = response.result.value {
// I do things with the content of the requestUrl...
}
}
Other Claims
I have found many different ways to set cookies through Alamofire that don't work, but if Alamofire isn't the way to do it, please inform me. I really need this to work, and I'm open to any and every suggestion.
It took four weeks to the day, but I figured it out! URLRequest and Alamofire were my glorious answers!
Create the URL to call.
let requestUrl: String = "http://www.samsclub.com/sams/search/searchResults.jsp?searchTerm=Apple"
Next make the URLRequest with the URL string, and set its http method.
var urlRequest = URLRequest(url: requestUrl)
urlRequest.httpMethod = "POST"
Then set the cookies for the URLRequest.
urlRequest.setValue("myPreferredClub=4969", forHTTPHeaderField: "Cookie")
urlRequest.httpShouldHandleCookies = true
Finally send the URLRequest with Alamofire, and use the response data in whatever way I wish.
Alamofire.request(urlRequest).responseString { response in
if let content: String = response.result.value {
// I do things with the content of the urlRequest...
}
}
I am a .net developer but very new to iOS and swift development, just need help with consuming Web API using Swift2
The Asp.net Web API has been built with OAuth2 authentication, published to my Azure VM server with SSL certificate installed. The API site itself works properly, tested through Postman
However I got stuck when started writing first few lines of code in Swift trying to get Authentication token. After reading some online tutorials I decided to engage Alamofire, and produced below codes snippet:
func GetToken() {
let params = [
"grant_type" : "password",
"username" : "123456#qq.com",
"password" : "averygoodpassword"
]
let headers = [
"Content-Type" : "application/x-www-form-urlencoded"
]
request(.POST, "https://api.example.com/token",
parameters: params,
headers: headers,
encoding: .JSON)
.responseJSON { request, response, result in
print (request)
print (response?.description)
print (result)
switch result {
case .Success(let JSON):
print("Success with JSON: \(JSON)")
case .Failure(let data, let error):
print("Request failed with error: \(error)")
if let data = data {
print("Response data: \(NSString(data: data, encoding: NSUTF8StringEncoding)!)")
}
}
}
}
It ends up with below output in Xcode which didn't seem to be OK. The error = unsupported_grant_type told me that the request were sent to server but the parameters were not sent with request properly. I really cannot figure out the reason and solution, had been digging on Internet for a few days but still feeling desperate with it. Can anyone help please? Even if someone can provide a pure swift solution without any 3rd party library will be greatly helpful. Thanks!
Xcode output:
Optional( { URL: https://api.example.com/token })
Optional(" { URL: https://api.example.com/token } { status code: 400, headers {\n \"Access-Control-Allow-Headers\" = \"Content-Type\";\n \"Access-Control-Allow-Methods\" = \"GET, POST, PUT, DELETE, OPTIONS\";\n \"Access-Control-Allow-Origin\" = \"*\";\n \"Cache-Control\" = \"no-cache\";\n \"Content-Length\" = 34;\n \"Content-Type\" = \"application/json;charset=UTF-8\";\n Date = \"Fri, 30 Sep 2016 10:30:31 GMT\";\n Expires = \"-1\";\n Pragma = \"no-cache\";\n Server = \"Microsoft-IIS/8.5\";\n \"X-Powered-By\" = \"ASP.NET\";\n} }")
SUCCESS
Success with JSON: {
error = "unsupported_grant_type";
}
I had a similar problem trying to POST to MailGun for some automated emails I was implementing in an app.
I was able to get this working properly with a large HTTP response. I put the full path into Keys.plist so that I can upload my code to github and broke out some of the arguments into variables so I can have them programmatically set later down the road.
// Email the FBO with desired information
// Parse our Keys.plist so we can use our path
var keys: NSDictionary?
if let path = NSBundle.mainBundle().pathForResource("Keys", ofType: "plist") {
keys = NSDictionary(contentsOfFile: path)
}
if let dict = keys {
// variablize our https path with API key, recipient and message text
let mailgunAPIPath = dict["mailgunAPIPath"] as? String
let emailRecipient = "bar#foo.com"
let emailMessage = "Testing%20email%20sender%20variables"
// Create a session and fill it with our request
let session = NSURLSession.sharedSession()
let request = NSMutableURLRequest(URL: NSURL(string: mailgunAPIPath! + "from=FBOGo%20Reservation%20%3Cscheduler#<my domain>.com%3E&to=reservations#<my domain>.com&to=\(emailRecipient)&subject=A%20New%20Reservation%21&text=\(emailMessage)")!)
// POST and report back with any errors and response codes
request.HTTPMethod = "POST"
let task = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
if let error = error {
print(error)
}
if let response = response {
print("url = \(response.URL!)")
print("response = \(response)")
let httpResponse = response as! NSHTTPURLResponse
print("response code = \(httpResponse.statusCode)")
}
})
task.resume()
}
The Mailgun Path is in Keys.plist as a string called mailgunAPIPath with the value:
https://API:key-<my key>#api.mailgun.net/v3/<my domain>.com/messages?
I'm slightly opposed to using 3rd party libraries, especially for small things like a http POST and this seems like a much more maintainable solution to me. Anyways, hope this helps, let me know if you have any questions!