concat_ignore_file_error
The `concat_ignore_file_error` directive instructs NGINX to continue processing requests despite file-not-found errors in concatenated file lists.
Description
The concat_ignore_file_error directive is part of the HTTP Concatenation module for NGINX, which allows multiple files, such as CSS and JavaScript, to be concatenated and served in a single request for optimization. When this directive is enabled, if any of the specified files in a concatenated request are missing (resulting in file-not-found errors), NGINX will ignore those errors and continue to process the remaining files instead of failing the entire request. This behavior can be particularly useful in development environments or scenarios where some files might be temporally unavailable, as it allows for partial serving of resources rather than a complete failure.
The parameter for this directive is a binary flag, where on enables the feature and off disables it. Setting the directive to on ensures that developers can test their applications without needing to ensure every file is available at all times, thus providing flexibility during development cycles. However, usage in production environments should be approached with caution, as it may lead to situations where clients are served incomplete resources without clear error indication.
Config Example
location /static/files/ {
concat on;
concat_ignore_file_error on;
}Using this directive in production can lead to serving incomplete resources without visible errors for end users.
Over-reliance on this directive may hide actual issues where files are missing or misconfigured.