sample-site.conf

upstream some_app_server {
  server 127.0.0.1:9393;
}

server {
    listen 80;

    server_name my-upload-endpoint.com ;


    # Note that these settings are custom to this example and can be modified.
    # Use caution when doing this, however. You should specify a client_body_buffer_size
    # of less than the size of your file chunks. If so, you will experience some performance
    # issues.

    client_max_body_size 4G;
    client_body_buffer_size 1024k;

    root /home/path/to/your_site;
    try_files $uri/index.html $uri @fast_upload_endpoint;

    # this block restricts upload requests to a specific domain
    if ($host !~* ^(localhost) ) {
      
    }

    location = /uploads {

      # For CORS
      if ($request_method = OPTIONS) {
        add_header Pragma no-cache;
        add_header X-Content-Type-Options nosniff;

        # Access control for CORS
        add_header Access-Control-Allow-Origin "http://www.somesite.com";
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
        add_header Access-Control-Allow-Headers "cache-control, content-range, accept, origin, session-id, content-disposition, x-requested-with, content-type, content-description, referer, user-agent";
        add_header Access-Control-Allow-Credentials "true";

        # 10 minute pre-flight approval
        add_header Access-Control-Max-Age 600;

        return 204;
      }

      if ($request_method = POST) {
        add_header Pragma no-cache;
        add_header X-Content-Type-Options nosniff;
        #add_header Cache-control "no-story, no-cache, must-revalidate";

        # Access control for CORS
        add_header Access-Control-Allow-Origin "http://www.somesite.com";
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
        add_header Access-Control-Allow-Headers "cache-control, content-range, accept, origin, session-id, content-disposition, x-requested-with, content-type, content-description, referer, user-agent";
        add_header Access-Control-Allow-Credentials "true";

        # 10 minute pre-flight approval
        add_header Access-Control-Max-Age 600;

        # Headers specifically for the upload module
        upload_add_header Access-Control-Allow-Origin "http://www.somesite.com";
        upload_add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
        upload_add_header Access-Control-Allow-Credentials "true";
        upload_add_header Access-Control-Allow-Headers "cache-control, content-range, accept, origin, session-id, content-disposition, x-requested-with, content-type, content-description, referer, user-agent";

        # Set specified fields in request body
        # This puts the original filename, new path+filename and content type
        # in the requests params
        upload_set_form_field $upload_field_name.name "$upload_file_name";
        upload_set_form_field $upload_field_name.content_type "$upload_content_type";
        upload_set_form_field $upload_field_name.path "$upload_tmp_path";

        upload_pass_form_field "^X-Progress-ID$|^authenticity_token$";
        upload_cleanup 400 404 499 500-505;
      }

      upload_pass @fast_upload_endpoint;

      # Where you want the uploads to go. Note that the "1" in this instance is a placeholder
      # that will map automatically to a folder in the directory specified. The upload module
      # knows which folder to choose based on the last character in the sessionID. The sessionID
      # we generate is done by blueimp, and nginx uses that sessionID for the uploaded file's name.
      # If the filename ends with "g", then you would expect to see the file in the /var/uploads/g
      # folder.

      # To ensure that your uploads go where you expect them, you should create a single folder for
      # every alphanumeric (a-zA-Z0-9).

      upload_store /var/uploads 1;

      # The upload_state folder is where your .state files will live. These files are used to track
      # the progress of chunked uploads. Note that you do not need a "1" here, as they all go into
      # the same folder.

      upload_state_store /var/upload_state;

      # set permissions on the uploaded files
      upload_store_access user:rw group:rw all:r;


    }

    location @fast_upload_endpoint {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header Host $http_host;
      proxy_redirect off;
      proxy_pass_header 'Access-Control-Allow-Origin';
      proxy_pass http://some_app_server;
    }
}

Am i missing something obvious? or is this file incorrect? it seems without the:
upload_resumable on;
directive, i just get 415 server errors.

@deweydb yes! Thanks!
Also, I think the uploads will fail unless the destination dirs under /var/uploads do not exist.

I got an error: nginx: [emerg] unknown directive "upload_add_header" in ....conf

I got an error: nginx: [emerg] unknown directive "upload_add_header" in ....conf

Me too.

Wow, what a blast from the past! I wouldn't trust any of the config shown here. I wrote this 8 years ago. It worked then, but probably doesn't now.

upload_add_header

Me too. Because NGINX Upload Module is external paid lib.