{"id":5221,"date":"2023-02-13T17:49:12","date_gmt":"2023-02-13T12:19:12","guid":{"rendered":"https:\/\/trysiteprice.com\/blog\/?p=5221"},"modified":"2023-02-13T17:49:12","modified_gmt":"2023-02-13T12:19:12","slug":"nginx-send-http-user-agent-requests-to-specific-backend-server","status":"publish","type":"post","link":"https:\/\/trysiteprice.com\/blog\/nginx-send-http-user-agent-requests-to-specific-backend-server\/","title":{"rendered":"nginx: Send HTTP User Agent Requests To Specific Backend Server"},"content":{"rendered":"

You can send HTTP User-Agent requests to a specific backend server in Nginx using the map<\/code> directive. The map<\/code> directive is used to create a lookup table that can be used to match specific conditions and take actions based on those conditions.<\/p>\n

Here is an example of how to send HTTP User-Agent requests to a specific backend server in Nginx:<\/p>\n

\n
<\/div>\n
map<\/span> $http_user_agent $backend_server {
\n default backend1;
\n ~*Firefox backend2;
\n}<\/p>\n

server {
\n listen<\/span> 80<\/span>;<\/p>\n

location \/ {
\n proxy_pass http:\/\/<\/span>$backend_server;
\n }
\n}<\/p>\n

upstream backend1 {
\n server 192.168<\/span>.0<\/span>.10<\/span>;
\n}<\/p>\n

upstream backend2 {
\n server 192.168<\/span>.0<\/span>.20<\/span>;
\n}
\n<\/code><\/div>\n<\/div>\n

In this example, the map<\/code> directive is used to create a lookup table named $backend_server<\/code>, which maps HTTP User-Agent strings to backend servers. The default<\/code> keyword is used to specify a default backend server, which will be used for all User-Agent strings that don’t match any of the other conditions.<\/p>\n

The ~*Firefox<\/code> condition matches User-Agent strings that contain the word “Firefox”, and maps them to the backend2<\/code> backend server.<\/p>\n

In the location<\/code> block, the proxy_pass<\/code> directive is used to pass incoming requests to the backend server specified in the $backend_server<\/code> lookup table.<\/p>\n

Finally, the upstream<\/code> blocks define the backend servers that can be used by the map<\/code> directive. In this example, backend1<\/code> is defined as the IP address 192.168.0.10<\/code>, and backend2<\/code> is defined as the IP address 192.168.0.20<\/code>.<\/p>\n

This configuration will send HTTP User-Agent requests that contain the word “Firefox” to the backend2<\/code> backend server, and all other User-Agent requests to the backend1<\/code> backend server.<\/p>\n","protected":false},"excerpt":{"rendered":"

You can send HTTP User-Agent requests to a specific backend server in Nginx using the map directive. The map directive is used to create a lookup table that can be used to match specific conditions and take actions based on those conditions. Here is an example of how to send HTTP User-Agent requests to a … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5221","post","type-post","status-publish","format-standard","hentry","category-best-tutorial"],"yoast_head":"\nnginx: Send HTTP User Agent Requests To Specific Backend Server - TrySitePrice<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/trysiteprice.com\/blog\/nginx-send-http-user-agent-requests-to-specific-backend-server\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"nginx: Send HTTP User Agent Requests To Specific Backend Server - TrySitePrice\" \/>\n<meta property=\"og:description\" content=\"You can send HTTP User-Agent requests to a specific backend server in Nginx using the map directive. The map directive is used to create a lookup table that can be used to match specific conditions and take actions based on those conditions. Here is an example of how to send HTTP User-Agent requests to a ... 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