mirror of https://github.com/perkeep/perkeep.git
83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package main
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import (
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"fmt"
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"http"
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"os"
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"io"
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)
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func handleGet(conn *http.Conn, req *http.Request) {
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blobRef := ParsePath(req.URL.Path)
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if blobRef == nil {
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badRequestError(conn, "Malformed GET URL.")
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return
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}
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fileName := blobRef.FileName()
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stat, err := os.Stat(fileName)
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if err == os.ENOENT {
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conn.WriteHeader(http.StatusNotFound)
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fmt.Fprintf(conn, "Object not found.")
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return
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}
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if err != nil {
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serverError(conn, err)
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return
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}
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file, err := os.Open(fileName, os.O_RDONLY, 0)
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if err != nil {
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serverError(conn, err)
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return
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}
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reqRange := getRequestedRange(req)
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if reqRange.SkipBytes != 0 {
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_, err = file.Seek(reqRange.SkipBytes, 0)
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if err != nil {
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serverError(conn, err)
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return
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}
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}
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var input io.Reader = file
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if reqRange.LimitBytes != -1 {
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input = io.LimitReader(file, reqRange.LimitBytes)
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}
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conn.SetHeader("Content-Type", "application/octet-stream")
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if !reqRange.IsWholeFile() {
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remainBytes := stat.Size - reqRange.SkipBytes
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if reqRange.LimitBytes != -1 &&
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reqRange.LimitBytes < remainBytes {
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remainBytes = reqRange.LimitBytes
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}
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conn.SetHeader("Content-Range",
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fmt.Sprintf("%d-%d/%d", reqRange.SkipBytes,
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reqRange.SkipBytes + remainBytes,
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stat.Size))
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}
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bytesCopied, err := io.Copy(conn, input)
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// If there's an error at this point, it's too late to tell the client,
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// as they've already been receiving bytes. But they should be smart enough
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// to verify the digest doesn't match. But we close the (chunked) response anyway,
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// to further signal errors.
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error sending file: %v, err=%v\n", blobRef, err)
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closer, _, err := conn.Hijack()
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if err != nil {
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closer.Close()
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}
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return
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}
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if bytesCopied != stat.Size {
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fmt.Fprintf(os.Stderr, "Error sending file: %v, copied= %d, not %d%v\n", blobRef,
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bytesCopied, stat.Size)
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closer, _, err := conn.Hijack()
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if err != nil {
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closer.Close()
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}
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return
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}
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}
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