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开启缓存后覆盖源站的ETag和Last-Modified

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GoEdgeLab
2021-10-04 08:41:44 +08:00
parent ce02c12bd0
commit 4d8565d583
1 changed files with 11 additions and 14 deletions
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25
internal/nodes/http_request_cache.go
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@@ -181,25 +181,22 @@ func (this *HTTPRequest) doCacheRead() (shouldStop bool) {
}
// ETag
// 这里强制设置ETag，如果先前源站设置了ETag，将会被覆盖，避免因为源站的ETag导致源站返回304 Not Modified
var respHeader = this.writer.Header()
var eTag = respHeader.Get("ETag")
var eTag = ""
var lastModifiedAt = reader.LastModified()
if len(eTag) == 0 {
if lastModifiedAt > 0 {
eTag = "\"" + strconv.FormatInt(lastModifiedAt, 10) + "\""
respHeader["ETag"] = []string{eTag}
}
if lastModifiedAt > 0 {
eTag = "\"" + strconv.FormatInt(lastModifiedAt, 10) + "\""
respHeader.Del("Etag")
respHeader["ETag"] = []string{eTag}
}
// 支持 Last-Modified
var modifiedTime = respHeader.Get("Last-Modified")
if len(modifiedTime) == 0 {
if lastModifiedAt > 0 {
modifiedTime = time.Unix(lastModifiedAt, 0).Format("Mon, 02 Jan 2006 15:04:05 GMT")
if len(respHeader.Get("Last-Modified")) == 0 {
respHeader.Set("Last-Modified", modifiedTime)
}
}
// 这里强制设置Last-Modified，如果先前源站设置了Last-Modified，将会被覆盖，避免因为源站的Last-Modified导致源站返回304 Not Modified
var modifiedTime = ""
if lastModifiedAt > 0 {
modifiedTime = time.Unix(lastModifiedAt, 0).Format("Mon, 02 Jan 2006 15:04:05 GMT")
respHeader.Set("Last-Modified", modifiedTime)
}
// 支持 If-None-Match