我在 .env 文件中定义了 API URL,如下所示
const isProdEnv = process.env.NODE_ENV === 'production'
const DEV_API_URL = "https://example-stage.herokuapp.com/v1/"
const PROD_API_URL = "https://example.herokuapp.com/v1/"
const API_URL = isProdEnv ? PROD_API_URL : DEV_API_URL
我的 nuxt 配置文件中有一个运行时配置,如下所示
runtimeConfig: {public: { apiURL: process.env.API_URL || "https://example-stage.herokuapp.com/v1/", }, },
我想在组件外部使用此 API URL,因为我有集中式 API 调用。我定义了一个名为
UseApiUrl
的可组合项,如下所示以使用运行时配置:
export default function useApiUrl() {
const config = useRuntimeConfig();
const apiUrl = ref(config.public.apiURL);
return { apiUrl };
}
我在 services/api.js 文件中使用这个可组合项
import useApiUrl from "~/composables/useApiUrl";
const { apiUrl } = useApiUrl();
export const HTTP = {
baseURL: apiUrl.value,
headers: {
"Content-Type": "application/json",
},
};
我在 request.js 文件中使用 HTTP 对象来实现集中式 HTTP 方法并设置像这样的标头
import { HTTP } from "./api";
export default class Req {
constructor() {
if (localStorage.getItem("token")) {
HTTP.headers.Authorization = "JWT " + localStorage.getItem("token");
} else {
delete HTTP.headers.Authorization;
}
}
async get(url, queryObject) {
let runUrl = url;
if (queryObject) {
const queryParams = new URLSearchParams();
for (const key in queryObject) {
if (Array.isArray(queryObject[key])) {
queryObject[key].forEach((value) => queryParams.append(key, value));
} else {
queryParams.append(key, queryObject[key]);
}
}
runUrl = url + "?" + queryParams.toString();
}
try {
const response = await fetch(HTTP.baseURL + runUrl, {
method: "GET",
headers: HTTP.headers,
});
if (!response.ok) {
throw new Error("Network response was not ok");
}
return await response.json();
} catch (error) {
throw error;
}
}
async post(url, payload) {
try {
const headers = { ...this.headers };
if (payload instanceof FormData) {
delete headers["Content-Type"];
} else {
headers["Content-Type"] = "application/json";
}
const token = localStorage.getItem("token");
if (token) {
headers["Authorization"] = "JWT " + token;
}
const response = await fetch(HTTP.baseURL + url, {
method: "POST",
headers: headers,
body:
(payload instanceof FormData && payload) || JSON.stringify(payload),
});
if (!response.ok) {
throw response;
}
return await response.json();
} catch (error) {
console.log(error);
throw error;
}
}
async put(url, payload) {
try {
const response = await fetch(HTTP.baseURL + url, {
method: "PUT",
headers: HTTP.headers,
body: JSON.stringify(payload),
});
if (!response.ok) {
throw new Error("Network response was not ok");
}
return await response.json();
} catch (error) {
throw error;
}
}
async patch(url, payload) {
// Implement similarly to post
try {
const response = await fetch(HTTP.baseURL + url, {
method: "PATCH",
headers: HTTP.headers,
body: JSON.stringify(payload),
});
if (!response.ok) {
throw new Error("Network response was not ok");
}
return await response.json();
} catch (error) {
throw error;
}
}
async delete(url) {
// Implement similarly to post
try {
const response = await fetch(HTTP.baseURL + url, {
method: "DELETE",
headers: HTTP.headers,
});
if (!response.ok) {
throw new Error("Network response was not ok");
}
return await response;
} catch (error) {
throw error;
}
}
}
我收到此错误
[nuxt] 需要访问 Nuxt 实例的可组合项在插件、Nuxt 挂钩、Nuxt 中间件或 Vue 设置函数之外调用。
任何人都可以帮助我了解如何在组件文件外部公开 API_URL 吗?
我需要使用api.js文件中的API_URL才能使用。
我无法真正从片段中重现您的整个代码,但我相信有问题的调用位于
const { apiUrl } = useApiUrl();
内部services/api.js
内部。因为像这样编写为独立常量,所以它是在加载文件时执行的,而不是在任何 <script setup>
代码内部调用时执行。
您应该将其包装在函数调用中,以避免在上下文之外被调用。
我有一个想法,但不确定它是否会像这样工作。如果有问题,请告诉我,希望我们能解决。
我会尝试将
services/api.js
变成composables/useHTTP.js
:
export useHttp = () => {
const HTTP = {
baseURL: useApiUrl().value,
headers: {
"Content-Type": "application/json",
},
};
return { HTTP };
};
然后在
request.js
:
export default class Req {
constructor() {
this.HTTP = useHttp().HTTP
if (localStorage.getItem("token")) {
this.HTTP.headers.Authorization = "JWT " + localStorage.getItem("token");
} else {
delete this.HTTP.headers.Authorization;
}
}
...
}
像这样,需要可组合项的代码不应早于您第一次需要
Req
类的实例时调用。这应该已经在 <script setup>
里面了。