abp/docs/en/framework/ui/react/http-requests.md

//[doc-seo]
{
    "Description": "Learn how HTTP requests are made in ABP React UI applications with Axios, runtime configuration, and ABP interceptors."
}

HTTP Requests

ABP React UI templates use Axios for HTTP requests. The generated app contains a shared Axios instance with ABP-specific request and response interceptors, plus typed API modules for backend endpoints.

The shared client is defined in src/lib/api/axios.ts and exported as api.

Base URL

The Axios base URL is resolved at request time from runtime configuration:

export function getApiBaseUrl(): string {
  const apiUrl = getApiUrl()
  if (apiUrl.startsWith('http://') || apiUrl.startsWith('https://')) {
    return apiUrl.replace(/\/$/, '') + '/api'
  }
  if (import.meta.env.DEV) {
    return '/api'
  }
  return apiUrl.replace(/\/$/, '') + '/api'
}

The API URL comes from:

1. dynamic-env.json -> apis.default.url
2. VITE_API_URL
3. src/env.ts generated fallback

In microservice solutions, apis.default.url normally points to the Web Gateway. In layered and single-layer solutions, it normally points to the HTTP API host.

Shared Axios Instance

The template creates one shared instance:

export const api = axios.create({
  baseURL: '',
  headers: {
    'X-Requested-With': 'XMLHttpRequest',
    'Content-Type': 'application/json',
  },
})

Use this instance for application API modules instead of creating new Axios clients. It centralizes ABP headers, authentication, tenant handling, language handling, and redirects.

Request Interceptor

Before each request, the template:

• Sets baseURL from runtime configuration.
• Adds Authorization: Bearer <token> from the OIDC user.
• Adds __tenant when the user has selected a tenant.
• Adds Accept-Language from i18next.
• Keeps default AJAX headers such as X-Requested-With.

api.interceptors.request.use(async (config) => {
  config.baseURL = getApiBaseUrl()

  const user = await userManager.getUser()
  if (user?.access_token) {
    config.headers.Authorization = `Bearer ${user.access_token}`
  }

  const tenantId = sessionStorage.getItem('abp_tenant_id')
  if (tenantId && !config.headers.__tenant) {
    config.headers.__tenant = tenantId
  }

  if (i18n?.language) {
    config.headers['Accept-Language'] =
      config.headers['Accept-Language'] ?? i18n.language
  }

  return config
})

Response Interceptor

The response interceptor handles common authorization failures:

• 401 Unauthorized: redirects to login unless skipAuthRedirect is set.
• 403 Forbidden: redirects to /403 unless skip403Redirect is set.
• Other errors are rejected so the caller can handle them.

api.interceptors.response.use(
  (response) => response,
  async (error) => {
    const status = error.response?.status

    if (status === 401 && !error.config?.skipAuthRedirect) {
      await userManager.signinRedirect()
      return Promise.reject(new Error('Unauthorized - redirecting to login'))
    }

    if (status === 403 && !error.config?.skip403Redirect) {
      window.location.href = '/403'
      return Promise.reject(new Error('Forbidden'))
    }

    return Promise.reject(error)
  }
)

Use skipAuthRedirect or skip403Redirect for calls where the component should handle the error itself.

Typed API Modules

The template organizes backend calls under src/lib/api/. For example, the Books sample defines DTOs and functions in books.ts:

import { api } from './axios'

export interface PagedResultDto<T> {
  items: T[]
  totalCount: number
}

export interface BookDto {
  id: string
  name?: string
  price: number
}

export async function getBooks(): Promise<PagedResultDto<BookDto>> {
  const { data } = await api.get<PagedResultDto<BookDto>>('/app/book', {
    params: {
      maxResultCount: 10,
      skipCount: 0,
    },
  })
  return data
}

Notice that the API module calls /app/book, not /api/app/book. The shared Axios base URL already includes the /api prefix when needed.

Using Requests from Components

The template uses TanStack Query for server state:

const { data, isLoading } = useQuery({
  queryKey: ['books', skipCount],
  queryFn: () =>
    getBooks({
      maxResultCount: 10,
      skipCount,
      sorting: 'creationTime desc',
    }),
})

Mutations use useMutation and invalidate related queries after success:

const createMutation = useMutation({
  mutationFn: createBook,
  onSuccess: () => {
    queryClient.invalidateQueries({ queryKey: ['books'] })
    toast.success(t('AbpUi::SavedSuccessfully'))
  },
})

Adding a New API Module

Create a file under src/lib/api/:

import { api } from './axios'

export interface ProductDto {
  id: string
  name: string
}

export async function getProducts(): Promise<ProductDto[]> {
  const { data } = await api.get<ProductDto[]>('/app/product')
  return data
}

Then consume it from a component with TanStack Query:

const productsQuery = useQuery({
  queryKey: ['products'],
  queryFn: getProducts,
})

Development Proxy

In development, Vite proxies /api, /connect, and /getEnvConfig. This lets the React app use same-origin paths while calls are forwarded to the backend, Auth Server, or gateway configured by VITE_API_URL and VITE_AUTH_URL.

See Also

• Environment Variables
• Authorization
• Permission Management