Python on nginx using fcgiwrap - upstream closed prematurely FastCGI stdout while reading response header from upstream

cgi, fastcgi, nginx, python

Solution

Try adding the response code ("`HTTP/1.0 200 OK`") to the top of the output from your `hello.py` like this:

#!/usr/bin/python

print "HTTP/1.0 200 OK"
print "Content-type: text/html\n\n"
print ""
print "Hello world"

Problem

I am trying to get a hello world python script to run on my nginx web server. I am getting a "502 Bad Gateway" error when I try and load up the URI: http://sub.dom.com/py-bin/hello.py This is the error that is in my nginx error log. ``` 2013/04/27 13:54:14 [error] 14158#0: *1 upstream closed prematurely FastCGI stdout while reading response header from upstream, client: w.x.y.z, server: sub.dom.com, request: "GET /py-bin/hello.py HTTP/1.1", upstream: "fastcgi://unix:/var/run/fcgiwrap.socket:", host: "sub.dom.com" ``` Location of py-bin: /home/cluber/www/sub.dom.com/py-bin Location of public_html: /home/cluber/www/sub.dom.com/public_html Location of hello.py: /home/cluber/www/sub.dom.com/py-bin/hello.py (chmod 777) Location of fastcgi_params: /etc/nginx/fastcgi_params Contents of nginx config ``` server { server_name sub.dom.com; access_log /home/cluber/www/sub.dom.com/logs/access.log; error_log /home/cluber/www/sub.dom.com/logs/error.log; root /home/cluber/www/sub.dom.com/public_html; index index.html index.html index.php /index.php; location ~ \.php$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; fastcgi_pass unix:/var/run/php5-fpm.sock; fastcgi_index index.php; include fastcgi_params; } location ~ ^/py-bin/.*\.py$ { gzip off; root /home/cluber/www/sub.dom.com; fastcgi_pass unix:/var/run/fcgiwrap.socket; fastcgi_index index.py; include fastcgi_params; } } ``` Contents of fastcgi_params ``` fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_FILENAME $request_filename; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param HTTPS $https; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200; ``` Location of socks: ``` ls /var/run | grep sock fcgiwrap.socket php5-fpm.sock ``` Contents of hello.py ``` #!/usr/bin/python print "Content-type: text/html\n\n" print "Hello world" ``` Note that PHP works fine.

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