How do you send an API request in Vapor 3 with the HTTPRequest struct?
I tried variations of the following code..
var headers: HTTPHeaders = .init()
let body = HTTPBody(string: a)
let httpReq = HTTPRequest(
method: .POST,
url: URL(string: "/post")!,
headers: headers,
body: body)
let httpRes: EventLoopFuture<HTTPResponse> = HTTPClient.connect(hostname: "httpbin.org", on: req).map(to: HTTPResponse.self) { client in
return client.send(httpReq)
}
The compile error Cannot convert value of type '(HTTPClient) -> EventLoopFuture<HTTPResponse>' to expected argument type '(HTTPClient) -> _'
I have tried other variations of code that worked.
Vapor 3 Beta Example Endpoint Request
let client = try req.make(Client.self)
let response: Future<Response> = client.get("http://example.vapor.codes/json")
I read and re-read:
https://api.vapor.codes/http/latest/HTTP/Structs/HTTPRequest.html
https://api.vapor.codes/http/latest/HTTP/Classes/HTTPClient.html
https://docs.vapor.codes/3.0/http/client/
Your problem is .map(to: HTTPResponse.self). Map needs to transform its result into a new result regularly, like you would map an array. However, the result of your map-closure returns an EventLoopFuture<HTTPResponse>. This results in your map function returning an EventLoopFuture<EventLoopFuture<HTTPResponse>>.
To avoid this complexity, use flatMap.
var headers: HTTPHeaders = .init()
let body = HTTPBody(string: a)
let httpReq = HTTPRequest(
method: .POST,
url: URL(string: "/post")!,
headers: headers,
body: body)
let client = HTTPClient.connect(hostname: "httpbin.org", on: req)
let httpRes = client.flatMap(to: HTTPResponse.self) { client in
return client.send(httpReq)
}
EDIT:
If you want to use the Content APIs you can do so like this:
let data = httpRes.flatMap(to: ExampleData.self) { httpResponse in
let response = Response(http: httpResponse, using: req)
return try response.content.decode(ExampleData.self)
}
HTTPClient.connect returns Future<HTTPClient> and it is mapping to a Future<HTTPResponse> not a EventLoopFuture<HTTPResponse>.
If you're expecting a single HTTPResponse use HttpClient.send instead of HTTPClient.connect.
If you're expecting multiple HTTPResponses then .map(to: HTTPResponse.self) must be changed to properly map to a EventLoopFuture<HTTPResponse>
This question already has an answer here:
Alamofire 5 Escaping Forward Slashes
(1 answer)
Closed 4 years ago.
I am encoding a JPEG image to Base64 for sending to my app's backend using Alamofire.
When I inspect the sent string using Charles Proxy I find out that the encoded string escapes all slashes (/) with a backslash (becoming \/). For example, the string data:image/jpeg;base64, at the beginning becomes:
data:image\/jpeg;base64,
As all slashes in the Base64 encoded string, which renders the encoded string unusable.
Here is the code I use for encoding the image. The variable imageBase64 receives the string with the escaped slashes.
if let image = image {
let croppedImage = image.af_imageAspectScaled(toFill: CGSize(width: 500, height: 500))
if let imageData = UIImageJPEGRepresentation(croppedImage, 0.8) {
let imageBase64 = "data:image/jpeg;base64,\(imageData.base64EncodedString())"
base64dict["base64"] = imageBase64 as AnyObject
bodyParams["AVATAR"] = base64dict as AnyObject
} else {
base64dict["base64"] = "null" as AnyObject
bodyParams["AVATAR"] = base64dict as AnyObject
}
}
When I send the imageData string to the backend using Alamofire, the json sent in the request body becomes like this:
{
"AVATAR": {
"base64": "data:image\/jpeg;base64,\/9j\/4AAQSkZJRgABAQAAkACQAAD\/4QC..."
}
}
where all slashes were escaped.
The code I use for making the request is the following:
Alamofire.request(finalURL,
method: method,
parameters: bodyParams,
encoding: JSONEncoding.default,
headers: ["Content-Type": "application/json"])
.responseJSON { response in
// process response
}
I ended using the custom JSONEncoder posted by csim at this answer: Alamofire 5 Escaping Forward Slashes.
I had to create a new class, using the code provided by csim, and then the Alamofire request became:
Alamofire.request(finalURL,
method: method,
parameters: bodyParams,
encoding: JSONEncodingWithoutEscapingSlashes.default,
headers: ["Content-Type": "application/json"])
.responseJSON { response in
// process response
}
Note: Test Api Used
I am using the latest 4.0 version of Alamofire with Swift4.0 and am trying to make a api request (GET) however what I get is a FAIULRE: INvalid URL
func getFlightData(airportCode: String, minutesBehind: String, minutesAhead:String){
let securityToken: String = "Basic YWFnZTQxNDAxMjgwODYyNDk3NWFiYWNhZjlhNjZjMDRlMWY6ODYyYTk0NTFhYjliNGY1M2EwZWJiOWI2ZWQ1ZjYwOGM="
var headers: HTTPHeaders = [:]
headers["Authorization"] = securityToken
var params: Parameters = [:]
params["city"] = airportCode
params["minutesBehind"] = minutesBehind
params["minuteAhead"] = minutesAhead
Alamofire.request("https://api.qa.alaskaair.com/1/airports/SEA/flights/flightInfo?city=SEA&minutesBehind=10&minutesAhead=120", method: .get, headers: headers).responseJSON { (response) in
print(response)
}
The result I get is:
FAILURE: invalidURL("https://api.qa.alaskaair.com/1/airports/SEA/flights/flightInfo?city=SEA&minutesBehind=10&minutesAhead=120")
Do i need to encode my url? if yes then how? The same request works great with the URL provided by Alamofire documentation:
Alamofire.request("https://httpbin.org/get")
You need to encode parameters like this:
let parameters: Parameters = ["city": "SEA", "minutesBehind" : "10"] // Add all parameters
Alamofire.request("https://api.qa.alaskaair.com/1/airports/SEA/flights/flightInfo", parameters: parameters)
I'm trying to re-create this Postman settings for posting in Alamofire. This is my first time to see an API that requires both Parameters and a body with Raw Json.
I'm done with gathering and formatting my data (either in Json using SwiftyJSON or Dictionary [String : Any] / Parameters) for the said requirement.
While I did see a similar question to this: Postman request to Alamofire request but it doesn't have a valid answer. Assume that I'm quite experienced with posting/getting/etc data from various API but I just don't know how to pass raw data just like in the photo above. Please check out my comments too in the code.
Here's what I'm doing with my function for this request:
/** Apply to job with Shift.
* This service function creates a json data for applying.
*/
func someFuncService(_ job: Job, daySchedules: [(Int, String, Schedule)], withBlock completion: #escaping JobServiceCommonCallBack) {
AuthService.someFunc { (currentCustomer, accessToken) in
guard let lalala = currentCustomer?.id,
let accessT = accessToken else {
completion(LalaErrors.currentCustomerError)
return
}
guard let jobId = job.id else {
completion(LalaErrors.modelError)
return
}
let coreService = LalaCoreService()
let applicantEndpoint = LalaCoreService.Endpoint.Applicant
let parameters = [
"param1" : customerId,
"param2" : jobId,
"accessToken" : accessToken,
"shift" : self.generateDataFromDaySchedules(daySchedules) // this returns [String : Any], can be printed into Json using JSON(x)
] as Parameters
GPLog(classSender: self, log: "FINAL PARAMETER: \(parameters)")
coreService.request = Alamofire.request(
applicantEndpoint,
method: .post,
parameters: parameters,
encoding: URLEncoding.default, // I already have tried .httpbody too.
headers: nil
)
coreService.request {
(response, result) in
if let error = result?.error {
if response!.statusCode == 500 {
completion(GPKitError.newError(description: "Failed to apply. Please contact the admin."))
return
}
completion(error)
return
}
// Success
completion(nil)
return
}
}
}
EDIT: So the question is, what I'm doing wrong here? API returns me status code 500 internal server error.
coreService.request = Alamofire.request(
applicantEndpoint,
method: .post,
parameters: parameters,
encoding: URLEncoding.default, // I already have tried .httpbody too.
headers: nil
)
should be
coreService.request = Alamofire.request(
applicantEndpoint + accessToken,
method: .post,
parameters: parameters,
encoding: JSONEncoding.default,
headers: nil
)
Alamofire.request(.GET, "url").authenticate(user: "", password: "").responseJSON() {
(request, response, json, error) in
println(error)
println(json)
}
This is my request with Alamofire, for a certain request it sometime works, but sometimes i get:
Optional(Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Invalid value around character 0.) UserInfo=0x78e74b80 {NSDebugDescription=Invalid value around character 0.})
I've read that this can be due to invalid JSON, but the response is a static json string that i have validated in JSON validator as valid. It does contain å ä ö characters and some HTML.
Why am i getting this error sometimes?
I also faced same issue. I tried responseString instead of responseJSON and it worked. I guess this is a bug in Alamofire with using it with django.
In my case , my server URL was incorrect. Check your server URL !!
I got same error while uploading image in multipart form in Alamofire as i was using
multipartFormData.appendBodyPart(data: image1Data, name: "file")
i fixed by replacing by
multipartFormData.appendBodyPart(data: image1Data, name: "file", fileName: "myImage.png", mimeType: "image/png")
Hope this help someone.
May this Help YOu
Alamofire.request(.GET, "YOUR_URL")
.validate()
.responseString { response in
print("Success: \(response.result.isSuccess)")
print("Response String: \(response.result.value)")
}
The same issue happened to me and it actually ended up being a server issue since the content type wasn't set.
Adding
.validate(contentType: ["application/json"])
To the request chain solved it for me
Alamofire.request(.GET, "url")
.validate(contentType: ["application/json"])
.authenticate(user: "", password: "")
.responseJSON() { response in
switch response.result {
case .Success:
print("It worked!")
print(response.result.value)
case .Failure(let error):
print(error)
}
}
I got the same error. But i found the solution for it.
NOTE 1: "It is not Alarmofire error", it's bcouse of server error.
NOTE 2: You don't need to change "responseJSON" to "responseString".
public func fetchDataFromServerUsingXWWWFormUrlencoded(parameter:NSDictionary, completionHandler: #escaping (_ result:NSDictionary) -> Void) -> Void {
let headers = ["Content-Type": "application/x-www-form-urlencoded"]
let completeURL = "http://the_complete_url_here"
Alamofire.request(completeURL, method: .post, parameters: (parameter as! Parameters), encoding: URLEncoding.default, headers: headers).responseJSON { response in
if let JSON = response.result.value {
print("JSON: \(JSON)") // your JSONResponse result
completionHandler(JSON as! NSDictionary)
}
else {
print(response.result.error!)
}
}
}
This is how I managed to resolve the Invalid 3840 Err.
The error log
responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.}))
It was with Encoding Type used in the Request, The Encoding Type used should be acceptedin your Server-Side.
In-order to know the Encoding I had to run through all the Encoding Types:
default/
methodDependent/
queryString/
httpBody
let headers: HTTPHeaders = [
"Authorization": "Info XXX",
"Accept": "application/json",
"Content-Type" :"application/json"
]
let parameters:Parameters = [
"items": [
"item1" : value,
"item2": value,
"item3" : value
]
]
Alamofire.request("URL",method: .post, parameters: parameters,encoding:URLEncoding.queryString, headers: headers).responseJSON { response in
debugPrint(response)
}
It also depends upon the response we are recieving use the appropriate
responseString
responseJSON
responseData
If the response is not a JSON & just string in response use responseString
Example: in-case of login/ create token API :
"20dsoqs0287349y4ka85u6f24gmr6pah"
responseString
I solved using this as header:
let header = ["Content-Type": "application/json",
"accept": "application/json"]
In my case, there was an extra / in the URL .
Maybe it is too late but I solved this problem in another way not mentioned here:
When you use .responseJSON(), you must set the response header with content-type = application/json, if not, it'll crash even if your body is a valid JSON. So, maybe your response header are empty or using another content-type.
Make sure your response header is set with content-type = application/json to .responseJSON() in Alamofire work properly.
Hey guys this is what I found to be my issue: I was calling Alamofire via a function to Authenticate Users: I used the function "Login User" With the parameters that would be called from the "body"(email: String, password: String) That would be passed
my errr was exactly:
optional(alamofire.aferror.responseserializationfailed(alamofire.aferror.responseserializationfailurereason.jsonserializationfailed(error domain=nscocoaerrordomain code=3840 "invalid value around character 0." userinfo={nsdebugdescription=invalid value around character 0
character 0 is the key here: meaning the the call for the "email" was not matching the parameters: See the code below
func loginUser(email: String, password: String, completed: #escaping downloadComplete) {
let lowerCasedEmail = email.lowercased()
let header = [
"Content-Type" : "application/json; charset=utf-8"
]
let body: [String: Any] = [
"email": lowerCasedEmail,
"password": password
]
Alamofire.request(LOGIN_USER, method: .post, parameters: body, encoding: JSONEncoding.default, headers: header).responseJSON { (response) in
if response.result.error == nil {
if let data = response.result.value as? Dictionary<String, AnyObject> {
if let email = data["user"] as? String {
self.userEmail = email
print(self.userEmail)
}
if let token = data["token"] as? String {
self.token_Key = token
print(self.token_Key)
}
"email" in function parameters must match the let "email" when parsing then it will work..I no longer got the error...And character 0 was the "email" in the "body" parameter for the Alamofire request:
Hope this helps
I was sending the improper type (String) to the server in my parameters (needed to be an Int).
Error was resolved after adding encoding: JSONEncoding.default with Alamofire.
Alamofire.request(urlString, method: .post, parameters:
parameters,encoding:
JSONEncoding.default, headers: nil).responseJSON {
response in
switch response.result {
case .success:
print(response)
break
case .failure(let error):
print(error)
}
}
The application I was working on this morning had the same error. I believed it to be a server side error since I was unable to upload a user image.
However, upon checking my custom API, I realized that after adding an SSL certificate to my website that I had not updated the api.swift URLs, the data was unable to post:
let HOME_URL = "http://sitename.io"
let BASE_URL = "http://sitename.io/api"
let UPLOAD_URL = "http://sitename.io/api/user/upload"
I changed the URL's to https://. Problem solved.
In my case I have to add this Key: "Accept":"application/json" to my header request.
Something like this:
let Auth_header: [String:String] = ["Accept":"application/json", "Content-Type" : "application/json", "Authorization":"Bearer MyToken"]
I hope that this can help someone.
I face same issue and problem is in params.
let params = [kService: service,
kUserPath: companyModal.directory_path,
kCompanyDomain: UserDefaults.companyDomain,
kImageObject: imageString,
kEntryArray: jsonString,
kUserToken: UserDefaults.authToken] as [String : Any]
companyModal.directory_path is url. it coerced from string to any which create issues at server side. To resolve this issue I have to give default value which make it string value.
let params = [kService: kGetSingleEntry,
kUserPath: companyModal.directory_path ?? "",
kCompanyDomain: UserDefaults.companyDomain,
kUserToken: UserDefaults.authToken,
kEntryId: id,
] as [String: Any]
Probably you have "/" at the end of your path. If it is not GET request, you shouldn't put "/" at the end, otherwise you'll get the error
I Changed mimeType from "mov" to "multipart/form-data".
Alamofire.upload(multipartFormData: { (multipartFormData) in
do {
let data = try Data(contentsOf: videoUrl, options: .mappedIfSafe)
let fileName = String(format: "ios-video_%#.mov ", profileID)
multipartFormData.append(data, withName: "video", fileName: fileName, mimeType: "multipart/form-data")
} catch {
completion("Error")
}
}, usingThreshold: .init(), to: url,
method: .put,
headers: header)
Worked for me.. :)
For my case:
let header = ["Authorization": "Bearer \(Authserices.instance.tokenid)"]
I forgot the space before \ (after Bearer)
In my case error was due to duplicate email. You can recheck your API on postman to see if response there is OK or not.
In my case, I tried using Postman to get API and this error come from backend.