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add Cache304 as an alternative to the server-side kataras/iris/cache middleware - it can perform better with less server overheat but it comes with a cost of 304 instead of 200 so custom clients must make that check

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Former-commit-id: b0ba68c528c870fe060e2825c35689771a1d3680
This commit is contained in:
Gerasimos (Makis) Maropoulos
2018-01-25 16:19:45 +02:00
parent befb1f0c08
commit 969c2e87d4
8 changed files with 140 additions and 30 deletions
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16
core/router/fs.go
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@@ -411,7 +411,7 @@ func detectOrWriteContentType(ctx context.Context, name string, content io.ReadS
// content must be seeked to the beginning of the file.
// The sizeFunc is called at most once. Its error, if any, is sent in the HTTP response.
func serveContent(ctx context.Context, name string, modtime time.Time, sizeFunc func() (int64, error), content io.ReadSeeker) (string, int) /* we could use the TransactionErrResult but prefer not to create new objects for each of the errors on static file handlers*/ {
context.SetLastModified(ctx, modtime)
ctx.SetLastModified(modtime)
done, rangeReq := checkPreconditions(ctx, modtime)
if done {
return "", http.StatusNotModified
@@ -651,15 +651,15 @@ func checkPreconditions(ctx context.Context, modtime time.Time) (done bool, rang
switch checkIfNoneMatch(ctx) {
case condFalse:
if ctx.Method() == http.MethodGet || ctx.Method() == http.MethodHead {
context.WriteNotModified(ctx)
ctx.WriteNotModified()
return true, ""
}
ctx.StatusCode(http.StatusPreconditionFailed)
return true, ""
case condNone:
if modified, err := context.CheckIfModifiedSince(ctx, modtime); !modified && err == nil {
context.WriteNotModified(ctx)
if modified, err := ctx.CheckIfModifiedSince(modtime); !modified && err == nil {
ctx.WriteNotModified()
return true, ""
}
}
@@ -785,11 +785,11 @@ func serveFile(ctx context.Context, fs http.FileSystem, name string, redirect bo
if !showList {
return "", http.StatusForbidden
}
if modified, err := context.CheckIfModifiedSince(ctx, d.ModTime()); !modified && err == nil {
context.WriteNotModified(ctx)
if modified, err := ctx.CheckIfModifiedSince(d.ModTime()); !modified && err == nil {
ctx.WriteNotModified()
return "", http.StatusNotModified
}
ctx.Header("Last-Modified", d.ModTime().UTC().Format(ctx.Application().ConfigurationReadOnly().GetTimeFormat()))
ctx.SetLastModified(d.ModTime())
return dirList(ctx, f)
}
@@ -801,7 +801,7 @@ func serveFile(ctx context.Context, fs http.FileSystem, name string, redirect bo
}
// else, set the last modified as "serveContent" does.
context.SetLastModified(ctx, d.ModTime())
ctx.SetLastModified(d.ModTime())
// write the file to the response writer.
contents, err := ioutil.ReadAll(f)