刷新具有 Angular 2 路由的现有 url 时 Nginx 404 错误

Question

我有一个使用路由的angular 2 应用程序。当我点击我的基本 URL 时，页面会正确加载并路由到下一页。但是，如果我刷新同一页面，则会引发404 error。例如，如果我输入我的基本网址 example.com 然后它会路由到 example.com/dashboard 但如果我刷新此页面则会导致 404 错误。

我的Nginx 配置设置文件中有以下内容：

server  {
  ssl  on;
  ssl_certificate  Certificate.cer;
  ssl_certificate_key  privateKey.key;

  listen  443 ssl;
  server_name example.com;
  location / {
    include proxy_params;
    proxy_http_version 1.1;
    proxy_buffering off;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
    proxy_pass  http://localhost/temp/;

 }

 location /app {
    include proxy_params;
    proxy_http_version 1.1;
    proxy_buffering off;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
    proxy_pass  http://12.34.56.78:5001;

 }

}

刷新页面时出现404错误。基于this link 我修改了我的Nginx 配置以添加try_files 部分，如下所示：

更新：

server  {
  ssl  on;
  ssl_certificate  Certificate.cer;
  ssl_certificate_key  privateKey.key;

  listen  443 ssl;
  server_name example.com;
  location / {
    include proxy_params;
    proxy_http_version 1.1;
    proxy_buffering off;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
    proxy_pass  http://localhost/temp/;
    alias /usr/share/nginx/html/proj1;
    try_files $uri $uri/ /index.html$is_args$args;

 }

 location /app {
    include proxy_params;
    proxy_http_version 1.1;
    proxy_buffering off;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
    proxy_pass  http://12.34.56.78:5001;

 }

}

现在它会抛出无法找到JS 文件的错误。我在index.html（例如<script src="app.js"></script>）文件中引用的所有JS 文件都存在于与index.html 相同的目录中。

编辑：这是我在 Chrome 控制台的网络选项卡中看到的 JS 错误之一：

**General:**
Request URL: https://example.com/script.js
Request Method: GET
Status Code: 404 Not Found
Referrer Policy: no-referrer-when-downgrade

**Response Header:**
Connection: keep-alive
Content-Length: 571
Content-Type: text/html
Date:
Server: nginx/1.12.2

Answer 1

当您在例如 http:///some/path 的路径中并且您点击刷新时会出现 404 错误页面时出现问题。 ngnix 配置中的这一额外行可以解决问题。

server {
  listen 8080;
  server_name http://example.com;
  root /path/to/your/dist/location;
  index index.html index.htm;
  location / {
     try_files $uri $uri/ /index.html?/$request_uri;
    # This will allow you to refresh page in your angular app. 
  }
}

添加后重新启动 nginx 服务。

Answer 2

Angular 应用程序是单页应用程序 (SPA)。这意味着您只提供一个 HTML 文件，即 index.html

如果我刷新：

/home = index.html

/fred = index.html

/any = index.html

所以你需要告诉 NGINX 总是提供 index.html 而不管路由。

例如：

server {
  listen 8080;
  server_name http://example.com;
  root /path/to/your/dist/location;
  # eg. root /home/admin/helloWorld/dist
  index index.html index.htm;
  location / {
    try_files $uri $uri/ /index.html;
    # This will allow you to refresh page in your angular app. Which will not give error 404.
  }
}

见How to config nginx to run angular4 application