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|
package caddyhttp
import (
"log"
"net/http"
"strings"
"bitbucket.org/lightcodelabs/caddy2"
"bitbucket.org/lightcodelabs/caddy2/internal/caddyscript"
"go.starlark.net/starlark"
)
// TODO: Matchers should probably support regex of some sort... performance trade-offs?
type (
matchHost []string
matchPath []string
matchMethod []string
matchQuery map[string][]string
matchHeader map[string][]string
matchProtocol string
matchScript string
)
func init() {
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.host",
New: func() (interface{}, error) { return matchHost{}, nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.path",
New: func() (interface{}, error) { return matchPath{}, nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.method",
New: func() (interface{}, error) { return matchMethod{}, nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.query",
New: func() (interface{}, error) { return matchQuery{}, nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.header",
New: func() (interface{}, error) { return matchHeader{}, nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.protocol",
New: func() (interface{}, error) { return new(matchProtocol), nil },
})
caddy2.RegisterModule(caddy2.Module{
Name: "http.matchers.caddyscript",
New: func() (interface{}, error) { return new(matchScript), nil },
})
}
func (m matchScript) Match(r *http.Request) bool {
input := string(m)
thread := new(starlark.Thread)
env := caddyscript.MatcherEnv(r)
val, err := starlark.Eval(thread, "", input, env)
if err != nil {
log.Printf("caddyscript for matcher is invalid: attempting to evaluate expression `%v` error `%v`", input, err)
return false
}
return val.String() == "True"
}
func (m matchProtocol) Match(r *http.Request) bool {
switch string(m) {
case "grpc":
return r.Header.Get("content-type") == "application/grpc"
case "https":
return r.TLS != nil
case "http":
return r.TLS == nil
}
return false
}
func (m matchHost) Match(r *http.Request) bool {
for _, host := range m {
if r.Host == host {
return true
}
}
return false
}
func (m matchPath) Match(r *http.Request) bool {
for _, path := range m {
if strings.HasPrefix(r.URL.Path, path) {
return true
}
}
return false
}
func (m matchMethod) Match(r *http.Request) bool {
for _, method := range m {
if r.Method == method {
return true
}
}
return false
}
func (m matchQuery) Match(r *http.Request) bool {
for param, vals := range m {
paramVal := r.URL.Query().Get(param)
for _, v := range vals {
if paramVal == v {
return true
}
}
}
return false
}
func (m matchHeader) Match(r *http.Request) bool {
for field, vals := range m {
fieldVals := r.Header[field]
for _, fieldVal := range fieldVals {
for _, v := range vals {
if fieldVal == v {
return true
}
}
}
}
return false
}
// Interface guards
var (
_ RouteMatcher = (*matchHost)(nil)
_ RouteMatcher = (*matchPath)(nil)
_ RouteMatcher = (*matchMethod)(nil)
_ RouteMatcher = (*matchQuery)(nil)
_ RouteMatcher = (*matchHeader)(nil)
_ RouteMatcher = (*matchProtocol)(nil)
_ RouteMatcher = (*matchScript)(nil)
)
|
