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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import Foundation
import Dispatch
public class THTTPSessionTransport: TAsyncTransport {
public class Factory : TAsyncTransportFactory {
public var responseValidate: ((HTTPURLResponse?, Data?) throws -> Void)?
var session: URLSession
var url: URL
public class func setupDefaultsForSessionConfiguration(_ config: URLSessionConfiguration, withProtocolName protocolName: String?) {
var thriftContentType = "application/x-thrift"
if let protocolName = protocolName {
thriftContentType += "; p=\(protocolName)"
}
config.requestCachePolicy = .reloadIgnoringLocalCacheData
config.urlCache = nil
config.httpShouldUsePipelining = true
config.httpShouldSetCookies = true
config.httpAdditionalHeaders = ["Content-Type": thriftContentType,
"Accept": thriftContentType,
"User-Agent": "Thrift/Swift (Session)"]
}
public init(session: URLSession, url: URL) {
self.session = session
self.url = url
}
public func newTransport() -> THTTPSessionTransport {
return THTTPSessionTransport(factory: self)
}
func validateResponse(_ response: HTTPURLResponse?, data: Data?) throws {
try responseValidate?(response, data)
}
func taskWithRequest(_ request: URLRequest, completionHandler: @escaping (Data?, URLResponse?, Error?) -> ()) throws -> URLSessionTask {
let newTask: URLSessionTask? = session.dataTask(with: request, completionHandler: completionHandler)
if let newTask = newTask {
return newTask
} else {
throw TTransportError(error: .unknown, message: "Failed to create session data task")
}
}
}
var factory: Factory
var requestData = Data()
var responseData = Data()
var responseDataOffset: Int = 0
init(factory: Factory) {
self.factory = factory
}
public func readAll(size: Int) throws -> Data {
let read = try self.read(size: size)
if read.count != size {
throw TTransportError(error: .endOfFile)
}
return read
}
public func read(size: Int) throws -> Data {
let avail = responseData.count - responseDataOffset
let (start, stop) = (responseDataOffset, responseDataOffset + min(size, avail))
let read = responseData.subdata(in: start..<stop)
responseDataOffset += read.count
return read
}
public func write(data: Data) throws {
requestData.append(data)
}
public func flush(_ completed: @escaping (TAsyncTransport, Error?) -> Void) {
var error: Error?
var task: URLSessionTask?
var request = URLRequest(url: factory.url)
request.httpMethod = "POST"
request.httpBody = requestData
requestData = Data()
do {
task = try factory.taskWithRequest(request, completionHandler: { (data, response, taskError) in
// Check if there was an error with the network
if taskError != nil {
error = TTransportError(error: .timedOut)
completed(self, error)
return
}
// Check response type
if taskError == nil && !(response is HTTPURLResponse) {
error = THTTPTransportError(error: .invalidResponse)
completed(self, error)
return
}
// Check status code
if let httpResponse = response as? HTTPURLResponse {
if taskError == nil && httpResponse.statusCode != 200 {
if httpResponse.statusCode == 401 {
error = THTTPTransportError(error: .authentication)
} else {
error = THTTPTransportError(error: .invalidStatus(statusCode: httpResponse.statusCode))
}
}
// Allow factory to check
if error != nil {
do {
try self.factory.validateResponse(httpResponse, data: data)
} catch let validateError {
error = validateError
}
}
self.responseDataOffset = 0
if error != nil {
self.responseData = Data()
} else {
self.responseData = data ?? Data()
}
completed(self, error)
}
})
} catch let taskError {
error = taskError
}
if let error = error, task == nil {
completed(self, error)
}
task?.resume()
}
public func flush() throws {
let completed = DispatchSemaphore(value: 0)
var internalError: Error?
flush() { _, error in
internalError = error
completed.signal()
}
_ = completed.wait(timeout: DispatchTime.distantFuture)
if let error = internalError {
throw error
}
}
}
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