I have a program that needs to work equally for a directory of files or for the
contents of a zip file, so I'm using an fs.FS to abstract the two.
Some of the files need to be provided to a PDF importer that accepts an
io.ReadSeeker (#1).
Generally this is working fine except when trying to convert a zip file to an
io.ReadSeeker. Concisely:
1 package main
2
3 import (
4 "archive/zip"
5 "fmt"
6 "io"
7 )
8
9 func main() {
10 z, _ := zip.OpenReader("a.zip")
11 a, _ := z.Open("a") // a is a file in a.zip
12 f, _ := a.Stat()
13 fmt.Println(f.Name() == "a") // true
14 fmt.Println(a.(io.ReadSeeker))
15 }
Fails on line 14 with
interface conversion: *zip.checksumReader is not io.ReadSeeker: missing method
Seek
Advice on how to rectify this would be gratefully received.
#1
https://github.com/phpdave11/gofpdf/blob/b09d9214a2296c8ea10312d9c5a520e27f2148c9/contrib/gofpdi/gofpdi.go#L52
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