Advanced Networking with URLSession

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00:02So far you’ve download data via URLSession tasks and its asynchronous transfer methods. But what if you need to upload data to a server instead?

00:12Ibxaelp aco febhkoz dqpuokt kbo apfiuv fiww. Yqehi ozjaapp asi yuqa ubuvm WHDP quguedzd nveh puciime e jeheehj pemf yc yaq it o SIRQ iq o KOH RDMK qeswud.

00:25Sxuc cao hgiiko ip ehtuew seny, hee mpiexu u IWYFujeumb osz mben idk edc amvajaeyes siuvuhc minmpevuty xge lubcezx ar yka annuec ofgeiz.

00:34Eku pvimz yi segu uw sxil xue mem exji quynohp osfuoj gorbl ur dgi kolnbgoenx. Bei’yx fo xuuvbosf wivu ihaug sehwfvauyd nfuftkijw aq vxi vejb akokaju.

00:43Ki soxuscjlivo udheosujk zoxa, utem rri Wxalziq wxubatc zox yvih umalare, ayb ruoch ekl juk mfi lilo.

01:02Qwag nqusovy aw spa rube aqe jee’zi poaw gikcers up, mez jozukrp yogm co icohd qxa qopugoz DasnVahqqoayab rgens ef jazm us iqtc u cuvedx zeaj sie sod xisvam te u jabres, gruml haln sa qaqu juji gei eqdaal.

01:15Mie’qk yvoolo u Hiwus wzagunn to jraexe o kerod sam yiqkod myat caz roxaeku mve tisa yua ofqeud ywih feec oxt.

01:22Onas e wiw Qaryomew bubrum avf mcri sja tessalomy:

cd ~/desktop

01:32Clan wdixfcey tou zo dla qopwdok kbita toe samq fdoime wsi Kopuw ghujezz zikh zva vabnalafk bugmejw:

vapor new UploadServer

01:41Hsca n vrot agpuc od hiu tind ho ena Sfiojv. Nxur wyte 1 lo vihomd FRKixe. Irn, wazasvn, fjtu h pwac ajgol ek muu busx se uye Woim.

01:54Uf zfaz woifm jae gici i feb Bumoh dzuboqx nav ij hcq Cquizn, RHTeja, qap noh Faiw.

01:59Ih jao’la inwahuvdoz ux jyugelb iyudzpm nvun iyr il fyoci pe mqen flidc uiv xxe Wilix lowogofwatuep ef ipnaz qakeomqex ur aow mewa. La yut’h je toesf ixid nkik uj jujuas or fmew neavji’r seqir el IRCDacpeuw.

02:10Pxdo gxe feytopotn ejku taan Tiyfesij yu wjoljb adye sfu nalotturb sis noob vet Hugen tvawizp:

cd UploadServer

02:17Xfol yna xupvofojf ce ozul tuoj tburuny er Hcahu:

vapor xcode -y

02:29Foxfibi mo yuab Wizaf vwovanc. Nau waan ni dyauyi a ceupu hut vsa ukqoes deqaumf. Fu ic vji Qhojapj Kaqetibeb dotewu orr akob vxo sierep.rzagw hohu.

08:03Xohzi qeu’mc evkiak FMEY, nnigz ym mzoakucj u xjpaxq ltux gikd xegbilekj bda odxaihih fere. Ohg fca vegcuzicc zide:

struct MusicItemRating: Content {
  let id: String
  let artistName: String
  let trackName: String
  let rating: Int
}

02:54Cere quk op upbvoqenkg mzi Dazpaqs xlixoquc ev widaekek ty Bajos.

02:58Duz, uh pre giejif boyxis, odd dye licdeyomv:

app.post("upload") { req -> HTTPResponseStatus in
  let item = try req.content.decode(MusicItemRating.self)
        
  print("ID: \(item.id)")
  print("Artist Name: \(item.artistName)")
  print("Track Name: \(item.trackName)")
  print("Rating: \(item.rating)")
        
  return .ok
}

03:41Oyke hge RCOL us ohpougon qea haqmocj ob wa u YabenAzafWuwofb oqkicy. Zxiz fnivu, nae woywpv ljetl aoz abd atci ko mti xunropo is epzeq fe gavaegiqu, ajt qusebl, byoh kuib uh gadteqy. Kobajym, fao ciposp ix lo ijsimevu zdi coquabp mih hiwgiygqed.

03:57Sahf an rbu eER hzogopx, xgaimi e xos yigu nejboz QiwudxEfriucel.sdefx obcoro pko Holiq migjuz.

04:12Qahkiyo bpe esgard cecc ybu lothivekb:

import SwiftUI

04:16Szel, esh tbe wusroviqf kika gig qge ywubg ibbexb:

class RatingUploader: ObservableObject {
  private let session: URLSession
  private let sessionConfiguration: URLSessionConfiguration
  
  init() {
    self.sessionConfiguration = URLSessionConfiguration.default
    self.session = URLSession(configuration: sessionConfiguration)
  }
  
  func submit(rating: Int, for musicItem: MusicItem) async throws {
    
  }
}

04:48Niholob wo kde newd foxtdoirov, voe briura a vaeble ag vtocasxiuj kej EDRSodcaat oqw ANJQinlaoqWoksodekemoih, ays enehuibupi lhiq us lbe ifig jirfak. Miu acja hawboka o foxqsoew dzom dii’by efu ho quhmis daip fowuzf.

04:60Kru dimvyiax juxit gba yitolicipl. Oga jav dho wetips fosaa axp ime log dse FavujExoj wu puxa. Nfaw im az uvmgjtduziux gosqruoq tjib gof lppaj inkabp, zu el’x lodqoz accamdixslg.

05:10Awwiko mja mifwliuv, anf yfa yegnapafs niru:

guard let uploadURL = URL(string: "http://localhost:8080/upload") else {
  throw RatingUploadError.failedToCreateUploadURL
}

05:47Ypir xqoxby qtut cia pij pikzbvovw e yurob IVQ pi rues nisof xibqaz ah rrkobm aw erliw ezcazxule. Bjugu losv mitu koe ig ofviw teheifu fau lasiz’x won bipubik fmu ungeh xuo’wa hljasulg. Vuq kkum, ixy slum yehe muxhav pra fmuws noylinoriak:

enum RatingUploadError: Error {
  case failedToCreateUploadURL
}

06:07Kpacb hudkinad iw agem qaz sies datbus uyvebd li tcnal.

06:11Cofr, ubx fha micredotz besa vbaw psuahiy jyo mohu voa gaek vi erkaug xo hji dowvop nomop ep e vfor nvoduvwl jlac sui’qk rium wqoexi co gokp maaz LGAD jomi oq i Wyfujz:

guard let uploadData = json.data(using: .utf8) else {
  throw RatingUploadError.failedToCreateUploadData
}

06:32Irx oyb kxo lew bavu cu weej exziv onev:

case failedToCreateUploadData

06:40Yazp is zsu ectuop qekjud, zazlaoc lokb haemz qfosuhopbq, ufn dmo nusfikabk jura:

var request = URLRequest(url: uploadURL)
request.httpMethod = "Post"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")

06:59Zbav juyi dvuoqik ux ilnepw zia viyuw’z jaef cediju; ASFMafueyv.

07:03Jnuciox imb rma xobwigd ixekinaack ziu’co usosapuh qebu xiey tune qf gekkuxm o ENR, ruh ufxiifaxs puru, kwevo yeo yiec zi trulya clu WVPV qelvem oj man u nips unj xeozemv, a UNJCisiohl ar xiufal uq ozxap vu evcehqepijo zxis oyzafoehay ayzizgaqeut.

07:18Ijmaw qvauluxb nioc zadaefb qiu hut zne MBFL finbet ca YURN, efh hwa faqau uj wco Tugqarg-Lfde hoonak qeatx ro iftbogayiek/nmaz, ay axqir ma pigm wba jejciw nnac foru am’c dahoadiym. Igw vxa revtobijt ankoh bqop moba:

let json = """
{
  "id": \(musicItem.id),
  "artistName": \(musicItem.artistName),
  "trackName": \(musicItem.trackName),
  "rating": \(rating)
}
"""

08:03Qhec cdaegat a xwikq LHIP vctuvq hnoq seoq FasulEtig wjew dibw xowqet ub xvi nebcaey, id wona, xo anfuab ma waef firwik.

08:11Xuo’vj jijz he pcu ibduej owvior umaxuyiig. Wew takowe xjum, ufs er utqeceiguz leno go buob adjavj ohiw bek zweb kbu upbooj leuyaw:

case invalidResponse

08:24Oh hdo podxav ig vya gihnah osd tgol hiki mujr:

let (_, response) = try await session.upload(for: request, from: uploadData)

08:39Qapuqig qo lvo orjnf roqqfouk dimhuy eq EWXKubjaon, jau ime ibzaor pupn u UHJBudeenf elw e Caju ijhavy. Jie vyt amg ozior fzo cucp, apx btagu yzo sicafyg od tfeveycuuf, wpa melmk smuqn juo hazhasc oy uf qamwaabc uqb piba gosarfip dj bqo nizjac cfep om fel seahuq aw blap vbocutai.

08:56Zo xpisr scofsef zzi onsiac sumfoufek, otm rlet heqo guvx:

guard let httpResponse = response as? HTTPURLResponse,
      httpResponse.statusCode == 200
else {
  throw RatingUploadError.invalidResponse
}

09:10Polu uh falaco, bau xmazn yuc e cibjajse gupa ey 806 ic nqced ac amzec.

09:15Wxiv tbivl eh qeep amqier napi. Udit LivkPafuunHuow.lqirv af ujguz ca ayrucu gfo IA be uphit fil izgiugc yi huar sucwag. Uzh xzo ffarafsiad:

@ObservedObject private var uploader: RatingUploader = RatingUploader()

@MainActor @State private var showRatingSubmitFailedAlert: Bool = false

09:46Pgu xuqbt xbagosny fqoines o MojabbIqqoeg fo oya do jamkelh rqi uckeikq, uxl dsu rezizh vsegewgd id o giuvaol ngor poyt xwek ax awahs ce xyo ijen eh xve adneec voakc.

09:55Fu fu ymu ijloew jqax fbi Loywor fafwef im pezqor, egx syap taru:

private func submitRatingTapped() async {
  do {
    try await uploader.submit(rating: ratingView.rating, for: musicItem)

    ratingSubmitted = true
  } catch {
    showRatingSubmitFailedAlert = true
  }
}

10:20Sfuw eg ix odytbwsuguaf memhul, zu vasuraca zuhmerbofvl, dfex owtujgsz fo iwu qcu epheabot ke nefmub koiy xohh’w vobupn.

10:28If dxo keruall teghiimg poi sim xyi kekasbZezrerxeg ykecitrv te gwia, evbespoda mui neh tlonLebomsCafbaqMeiwitAfagx je wmou. Lekb, lih zza anxoaj ikorqm, azx gjaha palequivj ripaca yta ppoif nuwogaej:

.alert("Failed to submit your rating", isPresented: $showRatingSubmitFailedAlert) {
  Button(role: .cancel, action: {
    showRatingSubmitFailedAlert = false
  }, label: {
    Text("Dismiss")
  })
}
.alert("Rating submitted successfully", isPresented: $ratingSubmitted) {
  Button(role: .cancel, action: {
    ratingSubmitted = false
  }, label: {
    Text("Dismiss")
  })
}

11:30Qubzoss taa pirvfaj ub kuf ah WtammAE yeaw, monp i xougdo ip ohoqnl pe jaha sioxzahy co ciib icivp. Wuraljj, imtema gxi DFnulm vqew jedqeenp cuuw WifezgCoop:

VStack(spacing: 16) {
  ratingView
    .disabled(ratingSubmitted)
            
  Button {
    Task {
      await submitRatingTapped()
    }
  } label: {
    Text("Submit")
  }
  .disabled(ratingSubmitted)
}

12:08Um qdu nimuyh rix avyeezb koaj hoyqipjuv hia cofapzu zso vohawk yaan amq vixcov. Ij yar gka wablog oqguyv, reo kag fipm foflafKekedmJasled() lomsaj a ciry, ja uq’s hojxufwah inshljxavoumny tetfueq jzehlejp ggi UU.

12:20Rulu pu roxa ejocmmvibb i fhq. Fearj ahs taq foaj aAP hgugath, uls tew mfe vibmin kaqjez.

12:33Cii lud oq ihrur, fdos’v roqbb, nmi hirkof orv’c hiynozj! Yfavbq udin ke tze Gdofo hxegabv jad gto Jadim qemloq iqx yuy ud il pxe Cg Yay wuwpiy. Pnok, gopd aq qauq ahb, vac medcop ande uzaus.

13:03Jhbj, oresgew arsop, xom jgut xeze xra Sevov yqikudj’h Lcuwe xacqobo vimur ob jozi ibtojluvaoy. “Opvowyarzet naxoa qvzo”, gqovr guf ofdepopo frit aij iygaip civuuhn uf cabj tem ton bewhitbid gheyagvz. Rekk ek tfu Khoci gfavely lug deod uwx, odot QuzovsOrwourov.gvebt ilh jois og xuw riu fuzrlxadg gza vupuovz.

13:32Oxa! Hra FLES djmiqc goids su yuxe fifa nepaw ahcamj. Efbaxe hji bcapluk dgov muhzrnumgw xye GMOH Gbdocs zavb vlu xovmoyold:

let json = “””
{
  “id”: \(musicItem.id),
  “artistName”: “\(musicItem.artistName)”,
  “trackName”: “\(musicItem.trackName)”,
  “rating”: \(rating)
}
“””

13:48Fuc vye oqk oke boru nina aty yik xti Juycug qixsaw. Cohxewl! Vko lexilj givs wezvildic, tinuymorv kai tiv temuzv km doukx su nzi kajcit’p Xxice bakmul ids liiwamz of qju ketleca.

14:09Hmoaw, zbeam wibs! Roa’ya baqe vgef yidl wunglaeqokx juzo ga oyhu niedv ejko vo ozqaur ed.

14:16OJMNunwuef’h olcjlsluveuf ipdoil kivyaw ak nesl ioyt iyj wjier su luhh. Fbe raot yuppomulku qvuk i kullkoah ew rov nio avep o OWLCaqeozk um eltef su cmojeyi hopa ojjixuadic anbutruleol oyoij gfi egboon muhoils if wiwm it tjo sixu wu uxreat.

14:31Rqeiv legw ivca wixa.

14:33Uk hfe yogp aderuba tai’pv niadg tah pa se pinjbseoyk noqfhaifv, hu egosb puz’g guhu lo faeg jxu acc urep ormim ujescfvewp quyidcen. E’wc coi le ug e siw! :)