Others have suggested passing a ByteBuffer - I don’t think that will work
because you will be missing other methods that are probably needed (FileInfo to
get the name, etc)
> On Sep 21, 2022, at 7:26 PM, robert engels <reng...@ix.netcom.com> wrote:
>
> fs.FS does not support positional reads. It is always the entire file.
>
> You can create a wrapper struct that implements the Seek() (trivial - just
> keep a position and adjust Read() accordingly).
>
>
>
>> On Sep 21, 2022, at 6:58 PM, Rory Campbell-Lange <r...@campbell-lange.net>
>> wrote:
>>
>> 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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>
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