Failure Handling Options

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GoAhead responds to client requests by routing the request to a request handler. The zu einem handler in optionen handler is responsible for generating the response content or redirecting to another more suitable handler. GoAhead provides a suite of standard handlers for various content types zu einem handler in optionen web frameworks. The standard handlers supplied with GoAhead are:. You can extend GoAhead by creating your own custom handler to process Http requests and perform any processing you desire.

Once created zu einem handler in optionen are configured via routes in the route table. A route contains the full details for how to process a request including the required handler and required authentication. GoAhead matches each route in the route table in-order and selects the first matching route.

The route specifies the desired handler for requests matching that route. The last step of selecting a route is calling the candidate handler's optional match callback. If the match callback returns true, the handler will be selected. If it returns false, the handler and route will be skipped and the route selection process continues. Once the route has been selected, GoAhead invokes the handler service callback to process the request and generate a response.

At this point, request body data will be received and buffered. The handler may choose to not handler the request by returning a zero status code. In that case, the router continues matching routes to find a more suitable route and handler combination. Handler to serve C functions bound to URLs. The Continue handler is a pseudo handler that performs nothing. It simply continues routing by proceeding to examine the next route in the routing table.

The Continue handler is typically used when performing authentication which must be checked before proceeding to serve the request using the appropriate content handler. Here is a route directive that redirects to a login page if not authenticated. If the user is already authenticated, routing continues to examine the next route directive in the route table.

Handler to serve web pages, images and static resources. The file handler is zu einem handler in optionen default handler and will be used by route directives if another handler is not specified. Handler to serve Javascript templates for dynamic content. See Javascript Templates for more information.

Handler to process route redirects. The Redirect handler is used to redirect the client to alternate content. It is also used during login authentication to redirect the client to a login, logout or logged in page. Handler to zu einem handler in optionen file uploads. The upload handler is a special case that filters uploaded files. It is not a "terminal" handler and can be used with another handler to actually handle generating the response.

The Upload handler is automatically configured and does not need to be defined in the route table. GoAhead Handlers GoAhead responds to client requests by routing the request to a request handler. The standard handlers supplied with GoAhead are: Name Description action Handler to serve C functions bound to URLs continue Pseudo handler for request rewriting cgi Handler to serve CGI programs file Handler to serve web pages, images and static resources jst Handler to serve Javascript templates for dynamic content options Handler to serve HTTP Options and Trace methods redirect Handler to process route redirects zu einem handler in optionen Handler to process file uploads You can extend GoAhead by creating your own custom handler to process Http requests and perform any processing you desire.

Standard Handlers GoAhead includes a suite of handlers that process standard content. Continue Handler Zu einem handler in optionen Continue handler is a pseudo handler that performs nothing.

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