| 1 | import { exportaAHtml } from "./exportaAHtml.js" |
| 2 | import { ProblemDetails } from "./ProblemDetails.js" |
| 3 | |
| 4 | /** |
| 5 | * Espera a que la promesa de un fetch termine. Si |
| 6 | * hay error, lanza una excepción. Si no hay error, |
| 7 | * interpreta la respuesta del servidor como JSON y |
| 8 | * la convierte en una literal de objeto. |
| 9 | * |
| 10 | * @param { string | Promise<Response> } servicio |
| 11 | */ |
| 12 | export async function consumeJson(servicio) { |
| 13 | |
| 14 | if (typeof servicio === "string") { |
| 15 | servicio = fetch(servicio, { |
| 16 | headers: { "Accept": "application/json, application/problem+json" } |
| 17 | }) |
| 18 | } else if (!(servicio instanceof Promise)) { |
| 19 | throw new Error("Servicio de tipo incorrecto.") |
| 20 | } |
| 21 | |
| 22 | const respuesta = await servicio |
| 23 | |
| 24 | const headers = respuesta.headers |
| 25 | |
| 26 | if (respuesta.ok) { |
| 27 | // Aparentemente el servidor tuvo éxito. |
| 28 | |
| 29 | if (respuesta.status === 204) { |
| 30 | // No contiene texto de respuesta. |
| 31 | |
| 32 | return { headers, body: {} } |
| 33 | |
| 34 | } else { |
| 35 | |
| 36 | const texto = await respuesta.text() |
| 37 | |
| 38 | try { |
| 39 | |
| 40 | return { headers, body: JSON.parse(texto) } |
| 41 | |
| 42 | } catch (error) { |
| 43 | |
| 44 | // El contenido no es JSON. Probablemente sea texto de un error. |
| 45 | throw new ProblemDetails(respuesta.status, headers, texto, |
| 46 | "/error/errorinterno.html") |
| 47 | |
| 48 | } |
| 49 | |
| 50 | } |
| 51 | |
| 52 | } else { |
| 53 | // Hay un error. |
| 54 | |
| 55 | const texto = await respuesta.text() |
| 56 | |
| 57 | if (texto === "") { |
| 58 | |
| 59 | // No hay texto. Se usa el texto predeterminado. |
| 60 | throw new ProblemDetails(respuesta.status, headers, respuesta.statusText) |
| 61 | |
| 62 | } else { |
| 63 | // Debiera se un ProblemDetails en JSON. |
| 64 | |
| 65 | try { |
| 66 | |
| 67 | const { title, type, detail } = JSON.parse(texto) |
| 68 | |
| 69 | throw new ProblemDetails(respuesta.status, headers, |
| 70 | typeof title === "string" ? title : respuesta.statusText, |
| 71 | typeof type === "string" ? type : undefined, |
| 72 | typeof detail === "string" ? detail : undefined) |
| 73 | |
| 74 | } catch (error) { |
| 75 | |
| 76 | if (error instanceof ProblemDetails) { |
| 77 | // El error si era un ProblemDetails |
| 78 | |
| 79 | throw error |
| 80 | |
| 81 | } else { |
| 82 | |
| 83 | throw new ProblemDetails(respuesta.status, headers, respuesta.statusText, |
| 84 | undefined, texto) |
| 85 | |
| 86 | } |
| 87 | |
| 88 | } |
| 89 | |
| 90 | } |
| 91 | |
| 92 | } |
| 93 | |
| 94 | } |
| 95 | |
| 96 | exportaAHtml(consumeJson) |
| 1 | import { consumeJson } from "./consumeJson.js" |
| 2 | import { exportaAHtml } from "./exportaAHtml.js" |
| 3 | |
| 4 | /** |
| 5 | * @param { string } url |
| 6 | * @param { Object } body |
| 7 | * @param { "GET" | "POST"| "PUT" | "PATCH" | "DELETE" | "TRACE" | "OPTIONS" |
| 8 | * | "CONNECT" | "HEAD" } metodoHttp |
| 9 | */ |
| 10 | export async function enviaJson(url, body, metodoHttp = "POST") { |
| 11 | return await consumeJson(fetch(url, { |
| 12 | method: metodoHttp, |
| 13 | headers: { |
| 14 | "Content-Type": "application/json", |
| 15 | "Accept": "application/json, application/problem+json" |
| 16 | }, |
| 17 | body: JSON.stringify(body) |
| 18 | })) |
| 19 | } |
| 20 | |
| 21 | exportaAHtml(enviaJson) |
| 1 | /** |
| 2 | * Permite que los eventos de html usen la función. |
| 3 | * @param {function} functionInstance |
| 4 | */ |
| 5 | export function exportaAHtml(functionInstance) { |
| 6 | window[nombreDeFuncionParaHtml(functionInstance)] = functionInstance |
| 7 | } |
| 8 | |
| 9 | /** |
| 10 | * @param {function} valor |
| 11 | */ |
| 12 | export function nombreDeFuncionParaHtml(valor) { |
| 13 | const names = valor.name.split(/\s+/g) |
| 14 | return names[names.length - 1] |
| 15 | } |
| 1 | import { exportaAHtml } from "./exportaAHtml.js" |
| 2 | import { ProblemDetails } from "./ProblemDetails.js" |
| 3 | |
| 4 | /** |
| 5 | * Muestra un error en la consola y en un cuadro de |
| 6 | * alerta el mensaje de una excepción. |
| 7 | * @param { ProblemDetails | Error | null } error descripción del error. |
| 8 | */ |
| 9 | export function muestraError(error) { |
| 10 | |
| 11 | if (error === null) { |
| 12 | |
| 13 | console.error("Error") |
| 14 | alert("Error") |
| 15 | |
| 16 | } else if (error instanceof ProblemDetails) { |
| 17 | |
| 18 | let mensaje = error.title |
| 19 | if (error.detail) { |
| 20 | mensaje += `\n\n${error.detail}` |
| 21 | } |
| 22 | mensaje += `\n\nCódigo: ${error.status}` |
| 23 | if (error.type) { |
| 24 | mensaje += ` ${error.type}` |
| 25 | } |
| 26 | |
| 27 | console.error(mensaje) |
| 28 | console.error(error) |
| 29 | console.error("Headers:") |
| 30 | error.headers.forEach((valor, llave) => console.error(llave, "=", valor)) |
| 31 | alert(mensaje) |
| 32 | |
| 33 | } else { |
| 34 | |
| 35 | console.error(error) |
| 36 | alert(error.message) |
| 37 | |
| 38 | } |
| 39 | |
| 40 | } |
| 41 | |
| 42 | exportaAHtml(muestraError) |
| 1 | /** |
| 2 | * Detalle de los errores devueltos por un servicio. |
| 3 | */ |
| 4 | export class ProblemDetails extends Error { |
| 5 | |
| 6 | /** |
| 7 | * @param {number} status |
| 8 | * @param {Headers} headers |
| 9 | * @param {string} title |
| 10 | * @param {string} [type] |
| 11 | * @param {string} [detail] |
| 12 | */ |
| 13 | constructor(status, headers, title, type, detail) { |
| 14 | super(title) |
| 15 | /** |
| 16 | * @readonly |
| 17 | */ |
| 18 | this.status = status |
| 19 | /** |
| 20 | * @readonly |
| 21 | */ |
| 22 | this.headers = headers |
| 23 | /** |
| 24 | * @readonly |
| 25 | */ |
| 26 | this.type = type |
| 27 | /** |
| 28 | * @readonly |
| 29 | */ |
| 30 | this.detail = detail |
| 31 | /** |
| 32 | * @readonly |
| 33 | */ |
| 34 | this.title = title |
| 35 | } |
| 36 | |
| 37 | } |