I am using below code to get json data from server and it is returning error.
code :
func getPosts(page : Int, count : Int,completionHandler: (responseObject: ResponseModel) -> ()){
let header = ["Content-Type": "application/json"]
let responseModel = ResponseModel()
var posts = [StoryModel]()
var comments = [CommentModel]()
var customFields = [CustomFieldModel]()
let medium = ImageTypeModel()
let high = ImageTypeModel()
var postCount = [String]()
var categories = [CategoryModel]()
manager!.request(.GET, "http://www.anonews.co?json=get_recent_posts", parameters: ["page": page,"count" :count],headers: header)
.responseJSON { response in
switch response.result {
case .Success:
if let value = response.result.value {
let json = JSON(value)
print(json)
responseModel.status = json["status"].stringValue
responseModel.count = json["count"].intValue
responseModel.count_total = json["count_total"].intValue
responseModel.pages = json["pages"].intValue
for item in json["posts"].arrayValue {
let storymodel = StoryModel();
storymodel.comment_count = item["comment_count"].stringValue
storymodel.content = item["content"].stringValue
storymodel.excerpt = item["excerpt"].stringValue
storymodel.id = item["id"].intValue
storymodel.imageUrl = item["url"].stringValue
storymodel.title_plain = item["title_plain"].stringValue
storymodel.thumbnail = item["thumbnail"].stringValue
medium.url = item["thumbnail_images"]["medium_large"]["url"].stringValue
high.url = item["thumbnail_images"]["mvp-medium-thumb"]["url"].stringValue
storymodel.medium_large = medium
storymodel.mvp_medium_thumb = high
for category in json["posts"]["categories"].arrayValue {
let categoryModel = CategoryModel()
categoryModel.id = category["id"].intValue
categoryModel.title = category["title"].stringValue
categories.append(categoryModel)
}
storymodel.categories = categories
for commentobject in json["posts"]["comments"].arrayValue {
let comment = CommentModel()
comment.content = commentobject["content"].stringValue
comment.name = commentobject["name"].stringValue
comments.append(comment)
}
storymodel.comments = comments
for customFieldObject in json["posts"]["custom_fields"].arrayValue {
let customField = CustomFieldModel()
for post_count in customFieldObject["post_views_count"].arrayValue {
let count = post_count["post_views_count"].stringValue
postCount.append(count)
}
customField.post_views_count = postCount
customFields.append(customField)
}
storymodel.custom_fields = customFields
posts.append(storymodel)
}
responseModel.posts = posts
completionHandler(responseObject: responseModel)
}
case .Failure(let error):
print(error)
}
}
}
Here is the error message:
0
Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.}
Any one know what is the issue in my code?
I see you use .GET request, and transfer parameter in body. So the result will become Failure.
Related
I am transitioning from UIKit to SwiftUI in my app and am updating network calls to async await as well. I created a Large size widget that displays the weather for 7 airports. The airports identifiers are stored in an app group shared userdefatults container. I update the timeline every minute (just for testing, normally it would be every 20 minutes). Initially when the widget is selected and appears, all data is there and correct. After a timeline update the data updates, but not all the airports are returned and after two updates or so (not consistent), the screen goes blank. The userdefaults airports are updated from the main app and saved in the shared user defaults container and it calls WidgetCenter.shared.reloadAllTimelines. This is all working fine as I have another process that uses the same container for a small widget, but with only one airport returning data without the need for an appended array. If I remove the calls to empty the array, the data remains and doesn't go blank, but of course the array keeps appending. I've tried the removeAll() and [] to empty the array at different places in the code, but same result. I am trying to understand the flow in the async/await calls, but seem to be missing something here? Any help would be greatly appreciated. I've been googling and searching stack overflow for a month and don't really know how to solve this issue. Thanks in advance!
actor MetarService: NSObject, XMLParserDelegate, URLSessionDelegate, ObservableObject {
enum MetarFetcherError: Error {
case invalidServerResponse
case missingData
}
#Published var metarArray = [String]()
#Published var metarDataModel: [MetarDataModel] = []
var tempDataModel: [MetarDataModel] = []
func fetchMetars(metarAPTs: String) async throws -> [MetarDataModel] {
let wxUrl = URL(string: "https://www.aviationweather.gov/adds/dataserver_current/httpparam?dataSource=metars&requestType=retrieve&format=xml&hoursBeforeNow=3&mostRecent=true&stationString=" + metarAPTs)!
let (data, response) = try await URLSession.shared.data(from: wxUrl)
guard let httpResponse = response as? HTTPURLResponse,
httpResponse.statusCode == 200 else {
throw MetarFetcherError.invalidServerResponse
}
guard let xml = SWXMLHash.parse(data) as XMLIndexer? else {
throw MetarFetcherError.missingData
}
noDataResponse = (xml["response"]["data"].element?.attribute(by: "num_results")?.text) ?? "0"
if noDataResponse == "1" && (xml["response"]["data"]["METAR"]["observation_time"].element?.text) != nil {
if (xml["response"]["data"]["METAR"]["station_id"].element?.text) != nil {
myairport = xml["response"]["data"]["METAR"]["station_id"].element!.text
} else {
myairport = "MSNG"
}
if (xml["response"]["data"]["METAR"]["flight_category"].element?.text) != nil {
myfltcat = xml["response"]["data"]["METAR"]["flight_category"].element!.text
} else {
myfltcat = "MISNG"
}
switch myfltcat {
case "VFR":
mymetarImage = "sun.max.circle.fill"
case "MVFR":
mymetarImage = "cloud.sun.circle.fill"
case "IFR":
mymetarImage = "cloud.fog.circle.fill"
case "LIFR":
mymetarImage = "smoke.circle.fill"
default:
mymetarImage = "person.crop.circle.badge.questionmark"
}
if (xml["response"]["data"]["METAR"]["observation_time"].element?.text) != nil {
myobstime = xml["response"]["data"]["METAR"]["observation_time"].element!.text as NSString
if myobstime.length < 16 {
myobstime = "MISNG"
} else {
myobstime = myobstime.substring(with: NSRange(location: 11, length: 5)) as NSString
}
}
if (xml["response"]["data"]["METAR"]["visibility_statute_mi"].element?.text) != nil {
myvis = xml["response"]["data"]["METAR"]["visibility_statute_mi"].element!.text
let intVis = (myvis as NSString) .integerValue
myvis = String(intVis) + "SM"
} else {
myvis = "0"
}
if (xml["response"]["data"]["METAR"]["wind_dir_degrees"].element?.text) != nil {
mywinddir = xml["response"]["data"]["METAR"]["wind_dir_degrees"].element!.text
if mywinddir.contains("VRB") {
mywinddir = "VRB"
} else
if mywinddir.count <= 2 && mywinddir.count > 0 {
mywinddir = "0" + mywinddir
}
} else {
mywinddir = "MISNG"
}
if (xml["response"]["data"]["METAR"]["wind_speed_kt"].element?.text) != nil {
mywindspd = xml["response"]["data"]["METAR"]["wind_speed_kt"].element!.text
if mywindspd == "0" {
mywind = "Calm"
} else if mywindspd.count == 1 {
mywindspd = "0" + mywindspd
mywind = mywinddir + "/" + mywindspd + "KT"
} else if mywindspd.count > 1 {
mywind = mywinddir + "/" + mywindspd + "KT"
}
} else {
mywind = "MISNG"
}
}
self.tempDataModel.append(MetarDataModel(metarImage: mymetarImage, mairport: myairport, mobstime: myobstime as String, mfltcat: myfltcat, mvis: myvis, mwind: mywind))
self.metarDataModel = self.tempDataModel
tempDataModel = []
return metarDataModel
}
func readMetarApts() -> [String] {
let defaults = UserDefaults(suiteName: "group.userdefaults.shared.FRAT")!
if ((defaults.value(forKey: "icaoIdent") as! String).isEmpty) {
defaultairport = "KSFO"
} else {
defaultairport = defaults.value(forKey: "icaoIdent") as! String
}
wxAirport1 = defaults.value(forKey: "wxAirport1") as! String
wxAirport2 = defaults.value(forKey: "wxAirport2") as! String
wxAirport3 = defaults.value(forKey: "wxAirport3") as! String
wxAirport4 = defaults.value(forKey: "wxAirport4") as! String
wxAirport5 = defaults.value(forKey: "wxAirport5") as! String
wxAirport6 = defaults.value(forKey: "wxAirport6") as! String
metarArray.append(defaultairport)
metarArray.append(wxAirport1)
metarArray.append(wxAirport2)
metarArray.append(wxAirport3)
metarArray.append(wxAirport4)
metarArray.append(wxAirport5)
metarArray.append(wxAirport6)
metarArray = metarArray.sorted()
let returnArray = metarArray
metarArray = []
return returnArray
}// end of readAirports function
nonisolated func getAirports() -> ([MetarDataModel] ){
// transData = []
Task{
let tempArray = await readMetarApts()
for apts in tempArray {
let zData = try await self.fetchMetars(metarAPTs: apts)
if zData .isEmpty {
let errorData = MetarDataModel(metarImage: "sun.max.circle.fill", mairport: "DATA", mobstime: "CHK", mfltcat: "MSNG", mvis: "WiFi", mwind: "")
tempData = [errorData]
} else {
transData.append(contentsOf: zData)
tempData = transData
} // else Closure
} //Task Closure
//transData.removeAll()
} // apts in tempArray Closure
tempData = transData
// transData = []
return tempData.sorted()
} // end of getAirports function
} // end of MetarService Class
I have tried different solutions found on stack overflow, reddit, medium and others. But no matter what approach I take, if I try and empty the appended array in preparation for the next timeline update, it will always eventually return without data. At first I thought it was the app group shared container losing reference as I got the much debated 'kCFPreferencesAnyUser, ByHost: Yes, Container: (null)): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsd' in the log, but Apple says this does not indicate that particular condition? And, I use the container elsewhere with no issues. I am new to the async await and the new URLSession.shared.data(from: ) and maybe I'm not understanding the flow and timing of how the data is fetched and returned? I just need to append the array, display the data, then empty the array and wait for the next timeline to fetch new data. I've put the removeAll() and tried [] as an alternative in many different places in my code (at the start of the function and at the end of the function). Stumped!!
I was using a pod for ftp picture upload issue. But it is giving an error after I build the app with Swift 5.0.
Here is the error:
deinitialize()' is unavailable: the default argument to deinitialize(count:) has been removed, please specify the count explicitly.
Here is the Swift file belongs to pod:
import Foundation
/* Resource type, values defined in `sys/dirent.h`. */
public enum ResourceType: String {
case Unknown = "Unknown" // DT_UNKNOWN
case Directory = "Directory" // DT_DIR
case RegularFile = "RegularFile" // DT_REG
case SymbolicLink = "SymbolicLink" // DT_LNK
case NamedPipe = "NamedPipe" // DT_FIFO
case CharacterDevice = "CharacterDevice" // DT_CHR
case BlockDevice = "BlockDevice" // DT_BLK
case LocalDomainSocket = "LocalDomainSocket" // DT_SOCK
case Whiteout = "Whiteout" // DT_WHT
}
open class ResourceItem: CustomStringConvertible {
open var type: ResourceType = .Unknown
open var name: String = ""
open var link: String = ""
open var date: Date = Date()
open var size: Int = 0
open var mode: Int = 0
open var owner: String = ""
open var group: String = ""
open var path: String = "/"
open var description: String {
get {
return "\nResourceItem: \(name), \(type.rawValue)"
}
}
}
private let _resourceTypeMap: [Int:ResourceType] = [
Int(DT_UNKNOWN): ResourceType.Unknown,
Int(DT_FIFO): ResourceType.NamedPipe,
Int(DT_SOCK): ResourceType.LocalDomainSocket,
Int(DT_CHR): ResourceType.CharacterDevice,
Int(DT_DIR): ResourceType.Directory,
Int(DT_BLK): ResourceType.BlockDevice,
Int(DT_REG): ResourceType.RegularFile,
Int(DT_LNK): ResourceType.SymbolicLink,
Int(DT_WHT): ResourceType.Whiteout
]
/** Operation for resource listing. */
internal class ResourceListOperation: ReadStreamOperation {
fileprivate var inputData: NSMutableData?
var resources: [ResourceItem]?
override func streamEventEnd(_ aStream: Stream) -> (Bool, NSError?) {
var offset = 0
let bytes = self.inputData!.bytes.bindMemory(to: UInt8.self, capacity: (self.inputData?.length)!)
let totalBytes = CFIndex(self.inputData!.length)
var parsedBytes = CFIndex(0)
let entity = UnsafeMutablePointer<Unmanaged<CFDictionary>?>.allocate(capacity: 1)
var resources = [ResourceItem]()
repeat {
parsedBytes = CFFTPCreateParsedResourceListing(nil, bytes.advanced(by: offset), totalBytes - offset, entity)
if parsedBytes > 0 {
let value = entity.pointee?.takeUnretainedValue()
if let fptResource = value {
resources.append(self.mapFTPResources(fptResource))
}
offset += parsedBytes
}
} while parsedBytes > 0
self.resources = resources
entity.deinitialize()
return (true, nil)
}
fileprivate func mapFTPResources(_ ftpResources: NSDictionary) -> ResourceItem {
let item = ResourceItem()
if let mode = ftpResources[kCFFTPResourceMode as String] as? Int {
item.mode = mode
}
if let name = ftpResources[kCFFTPResourceName as String] as? String {
// CFFTPCreateParsedResourceListing assumes that teh names are in MacRoman.
// To fix it we create data from string and read it with correct encoding.
// https://devforums.apple.com/message/155626#155626
if configuration.encoding == String.Encoding.macOSRoman {
item.name = name
} else if let nameData = name.data(using: String.Encoding.macOSRoman) {
if let encodedName = NSString(data: nameData, encoding: self.configuration.encoding.rawValue) {
item.name = encodedName as String
}
}
item.path = self.path! + item.name
}
if let owner = ftpResources[kCFFTPResourceOwner as String] as? String {
item.owner = owner
}
if let group = ftpResources[kCFFTPResourceGroup as String] as? String {
item.group = group
}
if let link = ftpResources[kCFFTPResourceLink as String] as? String {
item.link = link
}
if let size = ftpResources[kCFFTPResourceSize as String] as? Int {
item.size = size
}
if let type = ftpResources[kCFFTPResourceType as String] as? Int {
if let resourceType = _resourceTypeMap[type] {
item.type = resourceType
}
}
if let date = ftpResources[kCFFTPResourceModDate as String] as? Date {
item.date = date
}
return item
}
override func streamEventHasBytes(_ aStream: Stream) -> (Bool, NSError?) {
if let inputStream = aStream as? InputStream {
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: 1024)
let result = inputStream.read(buffer, maxLength: 1024)
if result > 0 {
if self.inputData == nil {
self.inputData = NSMutableData(bytes: buffer, length: result)
} else {
self.inputData!.append(buffer, length: result)
}
}
buffer.deinitialize()
}
return (true, nil)
}
}
Can you help me how can I fix these 2 below lines:
buffer.deinitialize()
entity.deinitialize()
And is it okay if we fix these two lines? I mean does the pod work after we fix these two lines?
deinitialize now requires a count parameter indicating how many values you want to deinitialise.
From the context, the code is probably trying to deinitialise everything the pointer references, so the number of values we deinitialise will be equal to the number of values we allocate. This will be 1024 for buffer and 1 for entity.
You should replace those lines with:
buffer.deinitialize(count: 1024)
// and
entity.deinitialize(count: 1)
respectively
However, since this is code from a pod that you are modifying, make sure to check the terms in the licence of the pod to make sure you are not violating anything.
You should also inform the author of the pod that the pod needs updating. This API change is made in Swift 4.1, I think, so it's quite old.
I'm currently making a migration from Android to iOS, better said Java to Swift, I got a generic response in JSON, but I'm not able to use it as an object and show it in the storyboard. I'm really new to Swift so I've been stuck for a while.
I've tried ObjectMapper and also JSON decode with no result at all.
I declared this response as I used in Java(Android)
class ResponseObjectMapper<T,R>: Mappable where T: Mappable,R:Mappable{
var data:T?
var message:String!
var error:R?
required init?(_ map: Map) {
self.mapping(map: map)
}
func mapping(map: Map) {
data <- map["data"]
message <- map["message"]
error <- map["error"]
}
}
class UserMapper :Mappable{
var email:String?
var fullName:String?
var id:CLong?
var phoneNumber:String?
var token:CLong?
required init?(_ map: Map) {
}
func mapping(map: Map) {
email <- map["email"]
fullName <- map["fullName"]
id <- map["id"]
phoneNumber <- map["phoneNumber"]
token <- map["token"]
phoneNumber <- map["phoneNumber"]
}
}
In my Android project I use the Gson dependency and I was able to use my JSON as an object
class ErrorMapper:Mappable{
var message:String?
var code:Int?
required init?(_ map: Map) {
}
func mapping(map: Map) {
message <- map["message"]
code <- map["code"]
}
}
This is the Alamofire that gave me the JSON.
func login(params: [String:Any]){Alamofire.request
("http://192.168.0.192:8081/SpringBoot/user/login", method: .post,
parameters: params,encoding: JSONEncoding.default, headers:
headers).responseJSON {
response in
switch response.result {
case .success:
let response = Mapper<ResponseObjectMapper<UserMapper,ErrorMapper>>.map(JSONString: response.data)
break
case .failure(let error):
print(error)
}
}
}
If I print the response with print(response) I got
SUCCESS: {
data = {
email = "vpozo#montran.com";
fullName = "Victor Pozo";
id = 6;
phoneNumber = 099963212;
token = 6;
};
error = "<null>";
message = SUCCESS;
}
and if I use this code I can got a result with key and value but I don't know how to use it as an object
if let result = response.result.value {
let responseDict = result as! [String : Any]
print(responseDict["data"])
}
console:
Optional({
email = "vpozo#gmail.com";
fullName = "Victor Pozo";
id = 6;
phoneNumber = 099963212;
token = 6;
})
I would like to use it in an Object, like user.token in a View Controller, probably I'm really confused, trying to map with generic attributes.
Type 'ResponseObjectMapper<UserMapper, ErrorMapper>' does not conform to protocol 'BaseMappable'
First of all you will need a Network Manager which uses Alamofire to make all your requests. I have made generalized one that looks something like this. You can modify it as you want.
import Foundation
import Alamofire
import SwiftyJSON
class NetworkHandler: NSObject {
let publicURLHeaders : HTTPHeaders = [
"Content-type" : "application/json"
]
let privateURLHeaders : HTTPHeaders = [
"Content-type" : "application/json",
"Authorization" : ""
]
enum RequestType {
case publicURL
case privateURL
}
func createNetworkRequestWithJSON(urlString : String , prametres : [String : Any], type : RequestType, completion:#escaping(JSON) -> Void) {
let internetIsReachable = NetworkReachabilityManager()?.isReachable ?? false
if !internetIsReachable {
AlertViewManager.sharedInstance.showAlertFromWindow(title: "", message: "No internet connectivity.")
} else {
switch type {
case .publicURL :
commonRequest(urlString: baseURL+urlString, parameters: prametres, completion: completion, headers: publicURLHeaders)
break
case .privateURL:
commonRequest(urlString: baseURL+urlString, parameters: prametres, completion: completion, headers: privateURLHeaders)
break
}
}
}
func commonRequest(urlString : String, parameters : [String : Any], completion : #escaping (JSON) -> Void , headers : HTTPHeaders){
print("urlString:"+urlString)
print("headers:")
print(headers)
print("parameters:")
print(parameters)
let url = NSURL(string: urlString)
var request = URLRequest(url: url! as URL)
request.httpMethod = "POST"
request.httpHeaders = headers
request.timeoutInterval = 10
let data = try! JSONSerialization.data(withJSONObject: parameters, options: JSONSerialization.WritingOptions.prettyPrinted)
let json = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
if let json = json {
print("parameters:")
print(json)
}
request.httpBody = json!.data(using: String.Encoding.utf8.rawValue)
let alamoRequest = AF.request(request as URLRequestConvertible)
alamoRequest.validate(statusCode: 200..<300)
alamoRequest.responseJSON{ response in
print(response.response?.statusCode as Any )
if let status = response.response?.statusCode {
switch(status){
case 201:
print("example success")
SwiftLoader.hide()
case 200 :
if let json = response.value {
let jsonObject = JSON(json)
completion(jsonObject)
}
default:
SwiftLoader.hide()
print("error with response status: \(status)")
}
}else{
let jsonObject = JSON()
completion(jsonObject)
SwiftLoader.hide()
}
}
}
}
After this when ever you need to make a request you can use this function. This will take in parameters if any needed and once the request is complete it will execute a call back function in which you can handle the response. The response here will be of SWIFTYJSON format.
func makeNetworkRequest(){
let networkHandler = NetworkHandler()
var parameters : [String:String] = [:]
parameters["email"] = usernameTextField.text
parameters["pass"] = passwordTextField.text
networkHandler.createNetworkRequestWithJSON(urlString: "http://192.168.0.192:8081/SpringBoot/user/login", prametres: parameters, type: .publicURL, completion: self.handleResponseForRequest)
}
func handleResponseForRequest(response: JSON){
if let message = response["message"].string{
if message == "SUCCESS"{
if let email = response["data"]["email"].string{
//Do something with email.
}
if let fullName = response["data"]["fullName"].string{
//Do something with fullName.
}
if let id = response["data"]["id"].int{
//Do something with id.
}
if let phoneNumber = response["data"]["phoneNumber"].int64{
//Do something with phoneNumber.
}
if let token = response["data"]["token"].int{
//Do something with token.
}
}else{
//Error
}
}
}
Hope this helps. Let me know if you get stuck anywhere.
How to pass array parameter
Parameter
[
{
"id": 0,
"followerId": 1030,
"followingId": 1033,
"followerName": "string",
"followingName": "string",
"createdDate": "string",
"message": "string"
}
] //how to solve this array
API Function
class func postFollowers(params:[String: Any],success:#escaping([FollowingDataProvider]) -> Void, failure:#escaping (String) -> Void){
var request = RequestObject()
request = Services.servicePostForFollower(param: params)
APIManager.Singleton.sharedInstance.callWebServiceWithRequest(rqst: request, withResponse: { (response) in
if (response?.isValid)!
{
//success()
print(response?.object as! JSON)
success(self.followingJSONarser(responseObject: response?.object as! JSON));
//followingJSONarser(responseObject: response?.object as! JSON)
}
else
{
failure((response?.error?.description)!)
}
}, withError: {
(error) in
failure((error?.description)!)
})
}
Parsing
static func followingJSONarser(responseObject:JSON) -> [FollowingDataProvider]{
var dataProvider = [FollowingDataProvider]()
let jsonDataa = responseObject["data"]
print(jsonDataa)
let newJSON = jsonDataa["data"].arrayValue
print(newJSON)
for item in newJSON{
print(item)
dataProvider.append(FollowingDataProvider(id: item["userId"].intValue, followerId: item["userId"].intValue, followingId: item["followingId"].intValue, followerName: item["userName"].stringValue, followingName: item["followingName"].stringValue, createdDate: item["createdDate"].stringValue, message: item["message"].stringValue))
}
return dataProvider
}`
You can try to combine SwiftyJson with Codable
struct Root: Codable {
let id, followerID, followingID: Int
let followerName, followingName, createdDate, message: String
enum CodingKeys: String, CodingKey {
case id
case followerID = "followerId"
case followingID = "followingId"
case followerName, followingName, createdDate, message
}
}
if let con = response?.object as? JSON {
do {
let itemData = try con.rawData()
let res = try JSONDecoder().decode([Root].self, from: itemData)
print(res)
catch {
print(error)
}
}
Also avoid force-unwraps with json
response?.object as! JSON
Following your code you're trying to parse data from API, you can use SwiftyJSON with Alamofire to create an HTTP request (post,get,put,delete,etc)
You should use arrayObject instead of arrayValue
Your code missing the right definition to data parsing
static func followingJSONarser(responseObject:JSON) -> [FollowingDataProvider]{
var dataProvider = [FollowingDataProvider]()
var itemClass = [ItemClass]()
let jsonDataa = responseObject["data"] as! Dictionary
let newJSON = jsonDataa["data"].arrayObject as! Array
Now create a dataModel class to cast data to it
class ItemsClass:NSObject{
var id:Int = 0
var followerId:Int = 0
var followingId:Int = 0
var followerName:String = ""
var followingName:String = ""
var createdDate:String = ""
var message:String = ""
init(data:JSON) {
self.id = data["userId"].intValue
self.followerId = data["userId"].intValue
self.followingId = data["followingId"].intValue
self.followerName = data["userName"].stringValue
self.followingName = data["followingName"].stringValue
self.createdDate = data["createdDate"].stringValue
self.message = data["message"].stringValue
}
}
for item in newJSON{
dataProvider.append(itemClass)
}
return dataProvider
}`
I'm trying to create a basic asynchronous example in SwiftExpress using BrightFutures, and failing. Here's what I've got:
class FileSystem {
class func read(fileURL:NSURL, convert:(NSData?) -> Action<AnyContent>) -> Future<Action<AnyContent>, AnyError> {
let promise = Promise<Action<AnyContent>, AnyError>()
Queue.global.async {
let fileData = NSData(contentsOfURL:fileURL)
let action = convert(fileData)
promise.success(action)
}
return promise.future
}
}
Here's the server:
import Express
import TidyJSON
import BrightFutures
import Result
let app = express()
app.views.register(JsonView())
// Parameters: JSON object {"filePath" : "<filePath>"}
app.post("/readFile") { request -> Future<Action<AnyContent>, AnyError> in
//check if JSON has arrived
guard let json = request.body?.asJSON(),
let jsonDict = json.object,
let filePath = jsonDict["filePath"],
let filePathString = filePath.string else {
return future {
var response = [
"status": "error",
"message" : "Invalid request"
]
return Result(value: Action.render(JsonView.name, context: response))
}
}
print("json: \(json)")
print("json: \(json.object)")
let url = NSURL(fileURLWithPath: filePathString)
return FileSystem.read(url, convert: { data -> Action<AnyContent> in
var response = [String:AnyObject]()
var status:String
if data == nil {
status = "error"
response["message"] = "Could not read file"
}
else {
status = "ok"
response["result"] = data!
}
response["status"] = status
return Action.render(JsonView.name, context: response)
}).onSuccess { action in
print("action: \(action)")
}
}
app.all("/*") { request in
return Action.ok("Got a unknown request.")
}
app.listen(9999).onSuccess { server in
print("Express was successfully launched on port", server.port)
}
app.run()
When I connect to this using Postman, I get a `{}' in response. I can set breakpoints, and I know the code is executing, and I know I have an error (it can't find the file-- intentional on my part), just can't see why the response doesn't have the error status and message. Ideas?
Problem solved! A single line was wrong:
var response = [String:AnyObject]()
needed to be:
var response = [String:String]()