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https://github.com/willnorris/imageproxy.git
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1ceba2538c
The httpcache package is intended only to be used in private caches, so it will cache responses marked `private` like normal. However, imageproxy is a shared cache, so these response should not be cached under normal circumstances. This change introduces a potentially breaking change to start respecting the `private` cache directive in responses. This also adds a new `-forceCache` flag to ignore the `private` and `no-store` directives, and cache all responses regardless.
40 lines
834 B
Go
40 lines
834 B
Go
package httpcache
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import (
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"net/http"
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"sort"
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"strings"
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)
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type CacheControl map[string]string
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func ParseCacheControl(headers http.Header) CacheControl {
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cc := CacheControl{}
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ccHeader := headers.Get("Cache-Control")
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for _, part := range strings.Split(ccHeader, ",") {
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part = strings.Trim(part, " ")
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if part == "" {
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continue
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}
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if strings.ContainsRune(part, '=') {
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keyval := strings.Split(part, "=")
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cc[strings.ToLower(strings.Trim(keyval[0], " "))] = strings.Trim(keyval[1], ",")
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} else {
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cc[strings.ToLower(part)] = ""
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}
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}
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return cc
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}
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func (cc CacheControl) String() string {
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parts := make([]string, 0, len(cc))
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for k, v := range cc {
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if v == "" {
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parts = append(parts, k)
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} else {
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parts = append(parts, k+"="+v)
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}
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}
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sort.StringSlice(parts).Sort()
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return strings.Join(parts, ", ")
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}
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