mirror of
https://github.com/caddyserver/caddy.git
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105 lines
3 KiB
Go
105 lines
3 KiB
Go
// Copyright 2015 Light Code Labs, LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gzip
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import (
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"net/http"
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"path"
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"github.com/mholt/caddy/caddyhttp/httpserver"
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)
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// RequestFilter determines if a request should be gzipped.
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type RequestFilter interface {
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// ShouldCompress tells if gzip compression
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// should be done on the request.
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ShouldCompress(*http.Request) bool
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}
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// defaultExtensions is the list of default extensions for which to enable gzipping.
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var defaultExtensions = []string{"", ".txt", ".htm", ".html", ".css", ".php", ".js", ".json",
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".md", ".mdown", ".xml", ".svg", ".go", ".cgi", ".py", ".pl", ".aspx", ".asp", ".m3u", ".m3u8"}
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// DefaultExtFilter creates an ExtFilter with default extensions.
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func DefaultExtFilter() ExtFilter {
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m := ExtFilter{Exts: make(Set)}
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for _, extension := range defaultExtensions {
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m.Exts.Add(extension)
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}
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return m
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}
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// ExtFilter is RequestFilter for file name extensions.
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type ExtFilter struct {
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// Exts is the file name extensions to accept
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Exts Set
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}
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// ExtWildCard is the wildcard for extensions.
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const ExtWildCard = "*"
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// ShouldCompress checks if the request file extension matches any
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// of the registered extensions. It returns true if the extension is
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// found and false otherwise.
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func (e ExtFilter) ShouldCompress(r *http.Request) bool {
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ext := path.Ext(r.URL.Path)
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return e.Exts.Contains(ExtWildCard) || e.Exts.Contains(ext)
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}
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// PathFilter is RequestFilter for request path.
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type PathFilter struct {
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// IgnoredPaths is the paths to ignore
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IgnoredPaths Set
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}
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// ShouldCompress checks if the request path matches any of the
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// registered paths to ignore. It returns false if an ignored path
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// is found and true otherwise.
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func (p PathFilter) ShouldCompress(r *http.Request) bool {
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return !p.IgnoredPaths.ContainsFunc(func(value string) bool {
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return httpserver.Path(r.URL.Path).Matches(value)
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})
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}
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// Set stores distinct strings.
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type Set map[string]struct{}
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// Add adds an element to the set.
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func (s Set) Add(value string) {
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s[value] = struct{}{}
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}
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// Remove removes an element from the set.
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func (s Set) Remove(value string) {
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delete(s, value)
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}
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// Contains check if the set contains value.
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func (s Set) Contains(value string) bool {
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_, ok := s[value]
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return ok
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}
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// ContainsFunc is similar to Contains. It iterates all the
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// elements in the set and passes each to f. It returns true
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// on the first call to f that returns true and false otherwise.
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func (s Set) ContainsFunc(f func(string) bool) bool {
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for k := range s {
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if f(k) {
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return true
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}
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}
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return false
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}
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