So rufen Sie REST-Endpunkte auf

GET https://localhost:5001/api/book

Erfolg:

{
  "value": [
    { "id": 1, "title": "Dune", "year": 1965, "pages": 412 },
    { "id": 2, "title": "Foundation", "year": 1951, "pages": 255 }
  ]
}

Erfolg mit Paginierung:

{
  "value": [
    { "id": 1, "title": "Dune", "year": 1965, "pages": 412 },
    { "id": 2, "title": "Foundation", "year": 1951, "pages": 255 }
  ],
  "nextLink": "https://localhost:5001/api/book?$after=WyJCb29rMiJd"
}

Leeres Ergebnis (Element nicht gefunden):

{
  "value": []
}

curl -X GET "https://localhost:5001/api/book"

Die folgenden Modellklassen deserialisieren DAB-Antworten:

using System.Text.Json.Serialization;

public class DabResponse<T>
{
    [JsonPropertyName("value")]
    public List<T>? Value { get; set; }

    [JsonPropertyName("nextLink")]
    public string? NextLink { get; set; }

    [JsonPropertyName("error")]
    public DabError? Error { get; set; }

    [JsonIgnore]
    public bool IsSuccess => Error is null;

    [JsonIgnore]
    public bool HasNextPage => NextLink is not null;
}

public class DabError
{
    [JsonPropertyName("code")]
    public string Code { get; set; } = string.Empty;

    [JsonPropertyName("message")]
    public string Message { get; set; } = string.Empty;

    [JsonPropertyName("status")]
    public int Status { get; set; }
}

public class Book
{
    [JsonPropertyName("id")]
    public int Id { get; set; }

    [JsonPropertyName("title")]
    public string Title { get; set; } = string.Empty;

    [JsonPropertyName("year")]
    public int? Year { get; set; }

    [JsonPropertyName("pages")]
    public int? Pages { get; set; }
}

Rufen Sie die API auf, und deserialisieren Sie die Antwort:

public async Task<List<Book>> GetBooksAsync()
{
    var response = await httpClient.GetAsync("api/book");
    response.EnsureSuccessStatusCode();
    var result = await response.Content.ReadFromJsonAsync<DabResponse<Book>>();

    if (result?.Error is not null)
    {
        throw new Exception($"{result.Error.Code}: {result.Error.Message}");
    }

    return result?.Value ?? [];
}

Die folgenden Datenklassen modellen DAB-Antworten:

from dataclasses import dataclass
import requests

@dataclass
class Book:
    id: int
    title: str
    year: int | None = None
    pages: int | None = None

@dataclass
class DabError:
    code: str
    message: str
    status: int

@dataclass
class DabResponse:
    value: list[Book] | None = None
    next_link: str | None = None
    error: DabError | None = None

    @property
    def is_success(self) -> bool:
        return self.error is None

    @property
    def has_next_page(self) -> bool:
        return self.next_link is not None

Rufen Sie die API auf, und analysieren Sie die Antwort:

def get_books(base_url: str) -> list[Book]:
    response = requests.get(f"{base_url}/api/book")
    response.raise_for_status()
    data = response.json()

    if "error" in data:
        err = data["error"]
        raise Exception(f"{err['code']}: {err['message']}")

    return [Book(**item) for item in data.get("value", [])]

Die folgende Funktion ruft die API auf:

async function getBooks(baseUrl) {
  const response = await fetch(`${baseUrl}/api/book`);
  if (!response.ok) {
    throw new Error(`HTTP error: ${response.status}`);
  }
  const data = await response.json();

  if (data.error) {
    throw new Error(`${data.error.code}: ${data.error.message}`);
  }

  return data.value ?? [];
}

Beispielverwendung:

const books = await getBooks("https://localhost:5001");
console.log(`Fetched ${books.length} books from the API.`);

POST https://localhost:5001/api/book
Content-Type: application/json

{
  "id": 2000,
  "title": "Leviathan Wakes",
  "year": 2011,
  "pages": 577
}

curl -X POST "https://localhost:5001/api/book" \
  -H "Content-Type: application/json" \
  -d '{"id": 2000, "title": "Leviathan Wakes", "year": 2011, "pages": 577}'

var book = new Book
{
    Id = 2000,
    Title = "Leviathan Wakes",
    Year = 2011,
    Pages = 577
};
var response = await httpClient.PostAsJsonAsync("api/book", book);
response.EnsureSuccessStatusCode();
var result = await response.Content.ReadFromJsonAsync<DabResponse<Book>>();

if (result?.Error is not null)
{
    throw new Exception($"{result.Error.Code}: {result.Error.Message}");
}

book = {"id": 2000, "title": "Leviathan Wakes", "year": 2011, "pages": 577}
response = requests.post(f"{base_url}/api/book", json=book)
response.raise_for_status()
data = response.json()

if "error" in data:
    err = data["error"]
    raise Exception(f"{err['code']}: {err['message']}")

const book = { id: 2000, title: "Leviathan Wakes", year: 2011, pages: 577 };
const response = await fetch(`${baseUrl}/api/book`, {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(book),
});
const data = await response.json();

if (data.error) {
  throw new Error(`${data.error.code}: ${data.error.message}`);
}

PATCH https://localhost:5001/api/book/id/2000
Content-Type: application/json

{
  "id": 2000,
  "title": "Leviathan Wakes",
  "year": 2011,
  "pages": 577
}

curl -X PATCH "https://localhost:5001/api/book/id/2000" \
  -H "Content-Type: application/json" \
  -d '{"id": 2000, "title": "Leviathan Wakes", "year": 2011, "pages": 577}'

var book = new Book
{
    Id = 2000,
    Title = "Leviathan Wakes",
    Year = 2011,
    Pages = 577
};
var response = await httpClient.PatchAsJsonAsync("api/book/id/2000", book);
response.EnsureSuccessStatusCode();
var result = await response.Content.ReadFromJsonAsync<DabResponse<Book>>();

if (result?.Error is not null)
{
    throw new Exception($"{result.Error.Code}: {result.Error.Message}");
}

book = {"id": 2000, "title": "Leviathan Wakes", "year": 2011, "pages": 577}
response = requests.patch(f"{base_url}/api/book/id/2000", json=book)
response.raise_for_status()
data = response.json()

if "error" in data:
    err = data["error"]
    raise Exception(f"{err['code']}: {err['message']}")

const book = { id: 2000, title: "Leviathan Wakes", year: 2011, pages: 577 };
const response = await fetch(`${baseUrl}/api/book/id/2000`, {
  method: "PATCH",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify(book),
});
const data = await response.json();

if (data.error) {
  throw new Error(`${data.error.code}: ${data.error.message}`);
}

DELETE https://localhost:5001/api/book/id/2000

curl -X DELETE "https://localhost:5001/api/book/id/2000"

var response = await httpClient.DeleteAsync("api/book/id/2000");
response.EnsureSuccessStatusCode();
var result = await response.Content.ReadFromJsonAsync<DabResponse<Book>>();

if (result?.Error is not null)
{
    throw new Exception($"{result.Error.Code}: {result.Error.Message}");
}

response = requests.delete(f"{base_url}/api/book/id/2000")
response.raise_for_status()
data = response.json()

if "error" in data:
    err = data["error"]
    raise Exception(f"{err['code']}: {err['message']}")

const response = await fetch(`${baseUrl}/api/book/id/2000`, {
  method: "DELETE",
});
const data = await response.json();

if (data.error) {
  throw new Error(`${data.error.code}: ${data.error.message}`);
}