options_filter.go

Documentation: github.com/emicklei/go-restful/v3

     1  package restful
     2  
     3  import "strings"
     4  
     5  // Copyright 2013 Ernest Micklei. All rights reserved.
     6  // Use of this source code is governed by a license
     7  // that can be found in the LICENSE file.
     8  
     9  // OPTIONSFilter is a filter function that inspects the Http Request for the OPTIONS method
    10  // and provides the response with a set of allowed methods for the request URL Path.
    11  // As for any filter, you can also install it for a particular WebService within a Container.
    12  // Note: this filter is not needed when using CrossOriginResourceSharing (for CORS).
    13  func (c *Container) OPTIONSFilter(req *Request, resp *Response, chain *FilterChain) {
    14  	if "OPTIONS" != req.Request.Method {
    15  		chain.ProcessFilter(req, resp)
    16  		return
    17  	}
    18  
    19  	archs := req.Request.Header.Get(HEADER_AccessControlRequestHeaders)
    20  	methods := strings.Join(c.computeAllowedMethods(req), ",")
    21  	origin := req.Request.Header.Get(HEADER_Origin)
    22  
    23  	resp.AddHeader(HEADER_Allow, methods)
    24  	resp.AddHeader(HEADER_AccessControlAllowOrigin, origin)
    25  	resp.AddHeader(HEADER_AccessControlAllowHeaders, archs)
    26  	resp.AddHeader(HEADER_AccessControlAllowMethods, methods)
    27  }
    28  
    29  // OPTIONSFilter is a filter function that inspects the Http Request for the OPTIONS method
    30  // and provides the response with a set of allowed methods for the request URL Path.
    31  // Note: this filter is not needed when using CrossOriginResourceSharing (for CORS).
    32  func OPTIONSFilter() FilterFunction {
    33  	return DefaultContainer.OPTIONSFilter
    34  }
    35
View as plain text