I am having trouble converting the following curl to a url request in swift.
curl --location --request GET 'https://p52.pocket52.com/apis/v1?p={%22x%22:%22images%22,%22pl%22:{}}'
I Tried the following way, but I got Unexpectedly found nil while unwrapping an Optional value error
var request = URLRequest(url: URL(string: "https://p52.pocket52.com/apis/v1?p={%22x%22:%22images%22,%22pl%22:{}}")!,timeoutInterval: Double.infinity)
request.httpMethod = "GET"
I tried with the solution present in this link Converting curl to URL request in Swift
but this is a POST curl it doesn't works for GET curl, Since GET request should not contains a body.
Let me define it more clearly, Basically I need to frame the following GET request.
https://p52.xxxx.com/apis/v1?p={"x":"images","pl":""}
We can achieve it by attaching a swift dictionary for a URLComponent part but, hear I am having a nested dictionary that's where I am facing difficulty.
You can follow this answer like #Turo suggested and build your URL using URLComponents, like so:
var components = URLComponents(string: "https://p52.pocket52.com/apis/v1")
components?.queryItems = [
URLQueryItem(name: "p", value: #"{"x": "images", "pl" : ""}"#)
]
Then use the url property of URLComponents to compose your URLRequest:
guard let url = components?.url else { return }
var request = URLRequest(url: url)
request.httpMethod = "GET"
Related
In order to make HTTP request call using URLSession,I need to convert string to URL first so I have tried everything but just can’t convert this piece of string to URL(string: ).
This is the string:
“http://api-aws-eu-qa-1.abc-cde.com/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99”
I can’t share the exact Url but format is all same.
The actual url with same format works fine in browser but no way in Swift, also that works fine in POSTMAN
I have also tried URLComponents which hepls me create the URL from components to URL but that fails with 400 status code response error.
I really appreciate the help, I am completely bogged down with this isuue and can’t proceed with my assignment.
Update: Tested with fiddler and request was not going through with this URL - "“http://api-aws-eu-qa-1.abc-cde.com%E2%80%8B/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99”"
But when removed this %E2%80%8B in fiddler and resend it worked.
Any thoughts ..?
String to URL
let url = URL(string: "the url string goes here")
URL to String
let url = URL(string: "the url string goes here")
let urlString = url.absoluteString
Creating URL from URLComponents
var url: URL? {
var components = URLComponents()
components.scheme = "https"
components.host = "domain goes here" //example: twitter.com
components.path = "/path/goes/here"
components.queryItems = [
URLQueryItem(name: "item1", value: string1),
URLQueryItem(name: "item2", value: string2)
]
return components.url
}
try to add HEADER to you request:
let url = URL(string : urlString)
var request = URLRequest(url : url)
request.setValue("Application/json", forHTTPHeaderField : "Content-Type")
Your URL is:
http://api-aws-eu-qa-1.abc-cde.com%E2%80%8B/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99`
The "host" portion is:
api-aws-eu-qa-1.abc-cde.com%E2%80%8B
%E2%80%8B encodes a ZERO WIDTH SPACE. This is a perfectly valid URL:
URL(string: "http://api-aws-eu-qa-1.abc-cde.com%E2%80%8B/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99")
=> Optional(http://api-aws-eu-qa-1.abc-cde.com%E2%80%8B/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99)
However, there is no such host as api-aws-eu-qa-1.abc-cde.com%E2%80%8B, so you should expect the actual connection to fail.
I expect that whatever is generating your URL strings has a bug.
If you are having trouble creating the URL itself (if URL(string:) return nil, then I expect this is not your actual URL string.
If you construct an URLComponents, the results are correct but may be slightly misleading:
URLComponents(string: "http://api-aws-eu-qa-1.abc-cde.com%E2%80%8B/v1/car-types/manufacturer?page=0&pageSize=10&wa_key=abc-cde-efg-44ccd99")?.host
Optional("api-aws-eu-qa-1.abc-cde.com")
While this looks like "api-aws-eu-qa-1.abc-cde.com", the string actually has a ZERO WIDTH SPACE at the end, which is invisible (but still part of the host field, which will correctly fail if you try to connect to it).
AlamofireImage seems to be supposed to request with GET method in general. But in our project, to download images we have to request with POST method, because we send access token. I have searched for the similar question in Stack Overflow, but I couldn't find enough answers. Does anyone know how to download with POST request?
The URL is as follow:
https://host_name/project_name/GetImage
You can use af_setImage method from AlamofireImage extension of UIImageView and pass any URLRequestConvertible parameter. For example, create URLRequest instance with Alamofire initializer:
let urlPath = "https://host_name/project_name/GetImage"
if var imageRequest = try? URLRequest(url: urlPath, method: .post) {
imageRequest.addValue("token", forHTTPHeaderField: "token_field")
imageView.af_setImage(withURLRequest: imageRequest)
}
Because We have to send parameters in HTTPBodyData, following the Loe's answer, I made some changes to our code. The following is our new code:
let urlPath = "https://host_name/project_name/GetImage"
let parameters:[String: Any] = [
"token": "tokenValue",
"imageName": "imageName"
]
let dataRequest = Alamofire.request(urlPath,
method: HTTPMethod.post,
parameters: parameters,
encoding: JSONEncoding.default,
headers: [:])
guard let imageRequest = dataRequest.request else {
return
}
imageView.af_setImage(withURLRequest: imageRequest)
The Point is first, we create a DataRequestobject and then convert it to URLRequest Type with Alamofire.request()method.
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 trying to work with a MS Translator API from Swift 3 (right now playing in playgrounds, but the target platform is iOS). However, I got stuck when I was trying to get an access token for OAuth2. I have following code (I tried to port the code from example at Obtaining an access token):
let clientId = "id".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
let clientSecret = "secret".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
let scope = "http://api.microsofttranslator.com".addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
let translatorAccessURI = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13"
let requestDetails = "grant_type=client_credentials&client_id=\(clientId)&client_secret=\(clientSecret)&scope=\(scope)"
let postData = requestDetails.data(using: .ascii)!
let postLength = postData.count
var request = URLRequest(url: URL(string: translatorAccessURI)!)
request.httpMethod = "POST"
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("\(postLength)", forHTTPHeaderField: "Content-Length")
request.httpBody = postData
URLSession.shared.dataTask(with: webRequest) { (returnedData, response, error) in
let data = String(data: returnedData!, encoding: .ascii)
print(data)
print("**************")
print(response)
print("**************")
print(error)
}.resume()
Of course, I used a valid clientId and a valid clientSecret.
Now the callback prints following information. First, the returnedData contain a message that the request was invalid, along with a following message:
"ACS90004: The request is not properly formatted."
Second, the response comes with a 400 code (which fits the fact that the request is not properly formatted).
Third, the error is nil.
Now I was testing the call using Postman, and when I used the same URI, and put the requestDetails string as a raw body message (I added the Content-Type header manually), I got the same response. However, when I changed the body type in Postman UI to application/x-www-form-urlencoded and typed in the request details as key value pairs through its UI, the call succeeded. Now it seems that I am doing something wrong with the message formatting, or maybe even something bad with the Swift URLRequest/URLSession API, however, I cannot get a hold on to what. Can somebody help me out, please? Thanks.
OK, so after some more desperate googling and experimenting I have found my error. For the future generations:
The problem resided in encoding the parameters in the body of the PUT http request. Instead of:
let scope = "http://api.microsofttranslator.com"
.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
I have to use the following:
let scope = "http://api.microsofttranslator.com"
.addingPercentEncoding(withAllowedCharacters:
CharacterSet(charactersIn: ";/?:#&=$+{}<>,").inverted)!
Seems that the API (or the HTTP protocol, I am not an expert in this) have problems with / and : characters in the request body. I have to give credit to Studiosus' answer on Polyglot issue report.
I have seen two kinds of methods to make up the HTTP body.
First one is:
let url = NSURL(string: "http://example.com")
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
let postString = "id=13&name=Jack"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
Second one is:
let url = NSURL(string: "http://example.com")
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
let params = ["id":"13", "name":"Jack"] as Dictionary<String, String>
var err: NSError?
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
When I directly print out the request.HTTPBody the data is different. So I am wondering are there any differences between these two methods in terms of the implementation of the server side? Assuming I'am using PHP.
there're two format data.
in code using postString.dataUsingEncoding it will send data in urlencoded format. In client you must set request's Content-Type header to "application/x-www-form-urlencoded" or something like "application/x-www-form-urlencoded charset=utf-8"
in code using NSJSONSerialization.dataWithJSONObject it will send data in json format. In client you must set request's Content-Type header field to "application/json"
I'm iOS dev so I don't know about format's effect to server side PHP. to answer your question you must find difference between application/x-www-form-urlencoded and application/json format in server side