Add Content-Length header to HEAD requests (#14542)
* Add Content-Length header to HEAD requests This change adds the header Content-Length to HEAD HTTP requests. The previous behaviour was blocking some Windows executables (i.e bitsadmin.exe) from downloading files hosted in Gitea. This along with PR #14541, makes the web server compliant with HTTP RFC 2616 which states "The methods GET and HEAD MUST be supported by all general-purpose servers" and "The HEAD method is identical to GET except that the server MUST NOT return a message-body in the response." This should also respond to issues #8030 and #14532. * This change adds the header Content-Length to HEAD HTTP requests Pass the Size of the content as a parameter to ServeData() instead of calculating it using ioutil.ReadAll(reader) --> this call is dangerous and can result in a denial of service. * Add Content-Length header to HEAD requests Quick fix for imported dependency not used. * Check if size is positiv int ... Co-authored-by: zeripath <art27@cantab.net>
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@ -152,7 +152,7 @@ func GetAttachment(ctx *context.Context) {
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return
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}
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if err = ServeData(ctx, attach.Name, fr); err != nil {
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if err = ServeData(ctx, attach.Name, attach.Size, fr); err != nil {
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ctx.ServerError("ServeData", err)
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return
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}
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@ -20,7 +20,7 @@ import (
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)
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// ServeData download file from io.Reader
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func ServeData(ctx *context.Context, name string, reader io.Reader) error {
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func ServeData(ctx *context.Context, name string, size int64, reader io.Reader) error {
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buf := make([]byte, 1024)
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n, err := reader.Read(buf)
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if err != nil && err != io.EOF {
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@ -31,6 +31,11 @@ func ServeData(ctx *context.Context, name string, reader io.Reader) error {
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}
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ctx.Resp.Header().Set("Cache-Control", "public,max-age=86400")
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if size >= 0 {
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ctx.Resp.Header().Set("Content-Length", fmt.Sprintf("%d", size))
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} else {
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log.Error("ServeData called to serve data: %s with size < 0: %d", name, size)
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}
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name = path.Base(name)
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// Google Chrome dislike commas in filenames, so let's change it to a space
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@ -76,7 +81,7 @@ func ServeBlob(ctx *context.Context, blob *git.Blob) error {
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}
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}()
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return ServeData(ctx, ctx.Repo.TreePath, dataRc)
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return ServeData(ctx, ctx.Repo.TreePath, blob.Size(), dataRc)
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}
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// ServeBlobOrLFS download a git.Blob redirecting to LFS if necessary
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@ -105,7 +110,7 @@ func ServeBlobOrLFS(ctx *context.Context, blob *git.Blob) error {
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log.Error("ServeBlobOrLFS: Close: %v", err)
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}
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}()
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return ServeData(ctx, ctx.Repo.TreePath, lfsDataRc)
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return ServeData(ctx, ctx.Repo.TreePath, meta.Size, lfsDataRc)
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}
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return ServeBlob(ctx, blob)
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