54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
package protocol
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import (
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"strings"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/request"
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)
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// HostPrefixHandlerName is the handler name for the host prefix request
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// handler.
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const HostPrefixHandlerName = "awssdk.endpoint.HostPrefixHandler"
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// NewHostPrefixHandler constructs a build handler
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func NewHostPrefixHandler(prefix string, labelsFn func() map[string]string) request.NamedHandler {
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builder := HostPrefixBuilder{
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Prefix: prefix,
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LabelsFn: labelsFn,
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}
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return request.NamedHandler{
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Name: HostPrefixHandlerName,
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Fn: builder.Build,
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}
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}
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// HostPrefixBuilder provides the request handler to expand and prepend
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// the host prefix into the operation's request endpoint host.
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type HostPrefixBuilder struct {
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Prefix string
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LabelsFn func() map[string]string
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}
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// Build updates the passed in Request with the HostPrefix template expanded.
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func (h HostPrefixBuilder) Build(r *request.Request) {
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if aws.BoolValue(r.Config.DisableEndpointHostPrefix) {
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return
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}
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var labels map[string]string
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if h.LabelsFn != nil {
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labels = h.LabelsFn()
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}
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prefix := h.Prefix
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for name, value := range labels {
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prefix = strings.Replace(prefix, "{"+name+"}", value, -1)
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}
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r.HTTPRequest.URL.Host = prefix + r.HTTPRequest.URL.Host
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if len(r.HTTPRequest.Host) > 0 {
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r.HTTPRequest.Host = prefix + r.HTTPRequest.Host
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}
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}
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