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HTTPRequestSerializer.swift
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//////////////////////////////////////////////////////////////////////////////////////////////////
//
// HTTPRequestSerializer.swift
//
// Created by Dalton Cherry on 6/3/14.
// Copyright (c) 2014 Vluxe. All rights reserved.
//
//////////////////////////////////////////////////////////////////////////////////////////////////
import Foundation
extension String {
func escapeStr() -> String {
var raw: NSString = self
var str = CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,raw,"[].",":/?&=;+!@#$()',*",CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding))
return str
}
}
class HTTPRequestSerializer: NSObject {
var headers = Dictionary<String,String>()
var stringEncoding = NSUTF8StringEncoding
var allowsCellularAccess = true
var HTTPShouldHandleCookies = true
var HTTPShouldUsePipelining = false
var timeoutInterval: NSTimeInterval = 60
var cachePolicy: NSURLRequestCachePolicy = NSURLRequestCachePolicy.UseProtocolCachePolicy
var networkServiceType = NSURLRequestNetworkServiceType.NetworkServiceTypeDefault
let contentTypeKey = "Content-Type"
init() {
super.init()
}
func newRequest(url: NSURL, method: HTTPMethod) -> NSMutableURLRequest {
var request = NSMutableURLRequest(URL: url, cachePolicy: cachePolicy, timeoutInterval: timeoutInterval)
request.HTTPMethod = method.toRaw()
request.allowsCellularAccess = self.allowsCellularAccess
request.HTTPShouldHandleCookies = self.HTTPShouldHandleCookies
request.HTTPShouldUsePipelining = self.HTTPShouldUsePipelining
request.networkServiceType = self.networkServiceType
for (key,val) in self.headers {
request.addValue(val, forHTTPHeaderField: key)
}
return request
}
///creates a request from the url, HTTPMethod, and parameters
func createRequest(url: NSURL, method: HTTPMethod, parameters: Dictionary<String,AnyObject>?) -> (request: NSURLRequest, error: NSError?) {
var request = newRequest(url, method: method)
var isMultiForm = false
//do a check for upload objects to see if we are multi form
if let params = parameters {
for (name,object: AnyObject) in params {
if object is HTTPUpload {
isMultiForm = true
break
}
}
}
if isMultiForm {
if(method != HTTPMethod.POST || method != HTTPMethod.PUT) {
request.HTTPMethod = HTTPMethod.POST.toRaw() // you probably wanted a post
}
if parameters {
request.HTTPBody = dataFromParameters(parameters!)
}
return (request,nil)
}
var queryString = ""
if parameters {
queryString = self.stringFromParameters(parameters!)
}
if isURIParam(method) {
var para = request.URL.query ? "&" : "?"
var newUrl = "\(request.URL.absoluteString)\(para)\(queryString)"
request.URL = NSURL.URLWithString(newUrl)
} else {
var charset = CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(self.stringEncoding));
if !request.valueForHTTPHeaderField(contentTypeKey) {
request.setValue("application/x-www-form-urlencoded; charset=\(charset)",
forHTTPHeaderField:contentTypeKey)
}
request.HTTPBody = queryString.dataUsingEncoding(self.stringEncoding)
}
return (request,nil)
}
///convert the parameter dict to its HTTP string representation
func stringFromParameters(parameters: Dictionary<String,AnyObject>) -> String {
return join("&", map(serializeObject(parameters, key: nil), {(pair) in
return pair.stringValue()
}))
}
///check if enum is a HTTPMethod that requires the params in the URL
func isURIParam(method: HTTPMethod) -> Bool {
if(method == HTTPMethod.GET || method == HTTPMethod.HEAD || method == HTTPMethod.DELETE) {
return true
}
return false
}
///the method to serialized all the objects
func serializeObject(object: AnyObject,key: String?) -> Array<HTTPPair> {
var collect = Array<HTTPPair>()
if let array = object as? Array<AnyObject> {
for nestedValue : AnyObject in array {
collect.extend(self.serializeObject(nestedValue,key: "\(key)[]"))
}
} else if let dict = object as? Dictionary<String,AnyObject> {
for (nestedKey, nestedObject: AnyObject) in dict {
var newKey = key ? "\(key)[\(nestedKey)]" : nestedKey
collect.extend(self.serializeObject(nestedObject,key: newKey))
}
} else {
collect.append(HTTPPair(value: object, key: key))
}
return collect
}
//create a multi form data object of the parameters
func dataFromParameters(parameters: Dictionary<String,AnyObject>) -> NSData {
var mutData = NSMutableData()
var files = Dictionary<String,HTTPUpload>()
var notFiles = Dictionary<String,AnyObject>()
for (key, object: AnyObject) in parameters {
if let upload = object as? HTTPUpload {
files[key] = upload
} else {
notFiles[key] = object
}
}
var multiCRLF = "\r\n"
var boundary = "Boundary+\(arc4random())\(arc4random())"
var boundSplit = "\(multiCRLF)--\(boundary)\(multiCRLF)"
mutData.appendData("--\(boundary)\(multiCRLF)".dataUsingEncoding(self.stringEncoding))
var noParams = false
if notFiles.count == 0 {
noParams = true
}
var i = files.count
for (key,upload) in files {
mutData.appendData(multiFormHeader(key, fileName: upload.fileName,
type: upload.mimeType, multiCRLF: multiCRLF).dataUsingEncoding(self.stringEncoding))
mutData.appendData(upload.data)
if i == 1 && noParams {
} else {
mutData.appendData(boundSplit.dataUsingEncoding(self.stringEncoding))
}
}
if !noParams {
let paramStr = join(boundSplit, map(serializeObject(notFiles, key: nil), {(pair) in
return "\(self.multiFormHeader(pair.key, fileName: nil, type: nil, multiCRLF: multiCRLF))\(pair.getValue())"
}))
mutData.appendData(paramStr.dataUsingEncoding(self.stringEncoding))
}
mutData.appendData("\(multiCRLF)--\(boundary)--\(multiCRLF)".dataUsingEncoding(self.stringEncoding))
return mutData
}
///helper method to create the multi form headers
func multiFormHeader(name: String, fileName: String?, type: String?, multiCRLF: String) -> String {
var str = "Content-Disposition: form-data; name=\"\(name.escapeStr())\""
if fileName {
str += "; filename=\"\(fileName)\""
}
str += multiCRLF
if type {
str += "Content-Type: \"\(type)\"\(multiCRLF)"
}
str += multiCRLF
return str
}
///Local class to create key/pair of the parameters
class HTTPPair: NSObject {
var value: AnyObject
var key: String!
init(value: AnyObject, key: String?) {
self.value = value
self.key = key
}
func getValue() -> String {
var val = ""
if let str = self.value as? String {
val = str
} else if self.value.description {
val = self.value.description
}
return val
}
func stringValue() -> String {
var val = getValue()
if !self.key {
return val.escapeStr()
}
return "\(self.key.escapeStr())=\(val.escapeStr())"
}
}
}
class JSONRequestSerializer: HTTPRequestSerializer {
override func createRequest(url: NSURL, method: HTTPMethod, parameters: Dictionary<String,AnyObject>?) -> (request: NSURLRequest, error: NSError?) {
if self.isURIParam(method) {
return super.createRequest(url, method: method, parameters: parameters)
}
var request = newRequest(url, method: method)
var error: NSError?
if parameters {
var charset = CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
request.setValue("application/json; charset=\(charset)", forHTTPHeaderField: self.contentTypeKey)
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(parameters, options: NSJSONWritingOptions(), error:&error)
}
return (request, error)
}
}