Практика Shadowing: What Is REST API? Examples And How To Use It: Crash Course System Design #3 - Изучайте разговорный английский по видео
Создание урока...
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REST is the most common communication standard between computers over the internet.
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What is it?
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Why is it so popular?
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Let's take a look.
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API stands for Application Programming Interface.
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It is a way for two computers to talk to each other.
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The common API standard used by most mobile and web applications to talk to the servers is called REST.
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It stands for Representational State Transfer.
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It is a mouthful.
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What does that mean?
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REST is not a specification.
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It is a loose set of rules that has been the common standard for building web APIs since the early 2000s.
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An API that follows the REST standard is called a RESTful API.
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Some real-life examples are Twilio, Stripe, and Google Maps.
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Let's look at the basics of REST.
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A RESTful API organizes resources into a set of unique URIs or Uniform Resource Identifiers.
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The URIs differentiate different types of resources on a server.
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Here are some examples.
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The resources should be grouped by noun and not verb.
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An API to get all products should be slash products and not slash get all products.
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A client interacts with a resource by making a request to the endpoint for the resource over HTTP.
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The request has a very specific format as shown here.
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The line contains a URI for the resource we'd like to access.
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The URI is preceded by an XGTP verb, which tells the server what we want to do with the resource.
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A POST request means we want to create a new resource.
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A GET means we want to read the data about an existing resource.
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A PUT is for updating an existing resource.
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A DELETE is for removing an existing resource.
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You might have heard the acronym CRUD.
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This is what it stands for.
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In the body of these requests, there could be an optional HTTP request body that contains a custom payload of data, usually encoded in JSON.
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The server receives the request, processes it, and formats a result into a response.
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The first line of the response contains the HTTP status code to tell the client what happened to the request.
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A well implemented RESTful API returns proper HTTP status codes.
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The 200 level codes mean the request was successful.
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The 400 level codes mean something was wrong with our request.
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For example, the request contained incorrect syntax.
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At the 500 level, it means something ran wrong at the server level.
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For example, the service was unavailable.
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A well-behaved client could choose to retry a fail request with a 500 level status quo.
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We said could choose to retry because some actions are not idempotent and those require extra care when retrying.
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When an API is idempotent, making multiple identical requests has the same effect as making a single request.
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This is usually not the case for a post request to create a new resource.
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The response body is optional and could contain the data payload and is usually formatted in JSON.
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There's a critical attribute of REST that is worth discussing more.
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A REST implementation should be stateless.
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It means the two parties don't need to store any information about each other, and every request and response is independent from all others.
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This leads to web applications that are easy to scale and well-behaved.
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There are two final points to discuss to round out a well-behaved RESTful API.
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If an API endpoint returns a huge amount of data, use pagination.
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A common pagination scheme uses limit and offset as parameters.
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Here is an example.
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If they are not specified, the server should assume sensible default values.
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Lastly, versioning of an API is very important.
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allows an implementation to provide backward compatibility so that if we introduce breaking changes from one version to another,
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consumers can get enough time to move to the next version.
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There are many ways to version an API.
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The most straightforward is to prefix the version before the resource on the URI.
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For instance, like this.
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Restful API is simple and effective when applied sensibly.
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It may not be the best choice for all companies, but it is simple and good enough, and that's why it is so widely used.
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There are other popular API options like GraphQL and GRPC.
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We'll discuss those and compare them in separate videos.
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If you would like to learn more about system design, check out our books and weekly newsletter.
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Please subscribe if you learned something new thank you so much and we'll see you next time
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Лексика и советы по произношению к этому уроку
В этом видео 65 предложений и 753 слов для шедоуинга. Речь длится 5:11. Говорящий держит ровный темп — около 145 слов в минуту, удобный для шедоуинга. Только 78% слов входят в 3000 самых частых слов английского языка, поэтому лексика сложная.
Ключевая лексика этого видео
15 слов из видео, которые стоит выучить, с произношением и значением:
| Слово | Произношение | Значение |
|---|---|---|
| resource существительное | /ɹɪˈzɔːs/ | ресу́рс, запа́с |
| server существительное | /ˈsɝvɚ/ | се́рвер |
| format существительное | /ˈfɔːɹ.mæt/ | форма́т |
| behave глагол | /bɪˈheɪv/ | вести́ себя́, поступа́ть |
| implementation существительное | /ˌɪmplɪmənˈteɪʃən/ | воплоще́ние в реа́льность, реализа́ция |
| optional прилагательное | /ˈɑp.ʃə.nəl/ | необяза́тельный, факультати́вный |
| verb существительное | /vɝb/ | глаго́л |
| compare глагол | /kəmˈpɛɚ/ | сра́внивать, сравни́ть |
| custom существительное | /ˈkʌstəm/ | обы́чай, привы́чка |
| introduce глагол | /ˌɪntɹəˈdus/ | представля́ть, предста́вить |
| default существительное | /dɪˈfɔlt/ | дефо́лт, неплатёж |
| identical прилагательное | /ɪˈdɛntɪkl̩/ | иденти́чный, одина́ковый |
| implement глагол | /ˈɪmpləmənt/ | выполня́ть, осуществля́ть |
| interact глагол | /ɪn.təˈɹækt/ | взаимоде́йствовать |
| subscribe глагол | /səbˈskɹaɪb/ | подпи́сывать, подписа́ть |
Фразовые глаголы, которые вы услышите
| Слово | Значение |
|---|---|
| check out глагол | проверя́ть, прове́рить |
Произношение, на которое стоит обратить внимание
Говорящий использует 4 сокращённых и редуцированных форм, например we'll, don't, we'd. Произносите их коротко, так, как слышите.
- Звуки «sh» и «zh»: implementation /ˌɪmplɪmənˈteɪʃən/, optional /ˈɑp.ʃə.nəl/, differentiate /dɪf.əˈɹɛn.ʃi.eɪt/, pagination /ˌpæd͡ʒəˈneɪʃən/
- Длинные слова — следите за ударением: implementation /ˌɪmplɪmənˈteɪʃən/, unavailable /ˌʌnəˈveɪləbəl/, differentiate /dɪf.əˈɹɛn.ʃi.eɪt/, compatibility /kəmˌpætəˈbɪlɪti/, parameter /pəˈɹæm.ə.tɚ/
Как заниматься с этим видео
- Прослушайте всё видео один раз молча и выпишите незнакомые слова.
- Повторяйте предложение за предложением на обычной скорости, пока ваш ритм не совпадёт с ритмом говорящего.
- Запишите себя и сравните с оригиналом, обращая внимание на такие слова, как resource, server, format.
Что такое техника Shadowing?
Shadowing — это научно обоснованная техника изучения языка, изначально разработанная для подготовки профессиональных переводчиков и популяризированная полиглотом доктором Александром Аргуэльесом. Метод прост, но эффективен: вы слушаете аудио на английском от носителей языка и немедленно повторяете вслух — как тень, следующая за говорящим с задержкой в 1–2 секунды. В отличие от пассивного прослушивания или грамматических упражнений, Shadowing заставляет мозг и мышцы рта одновременно обрабатывать и воспроизводить реальные речевые паттерны. Исследования показывают, что это значительно улучшает точность произношения, интонацию, ритм, связную речь, понимание на слух и беглость речи — что делает его одним из самых эффективных методов для подготовки к IELTS Speaking и реального общения на английском.