Hi Tim,

An introduction to this part of the system is in 
https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessfulBuild/artifact/book-result/Zinc-Encoding-Meta/Zinc-Encoding-Meta.html
 [Character Encoding and Resource Meta Description] from the "Enterprise Pharo" 
book.

The error means that a file that you try to read as UTF-8 does contain things 
that are invalid with respect to the UTF-8 standard.

Are you sure the file is in UTF-8, maybe it is in ASCII, Latin-1 or something 
else ?

It is possible to customise the encoding to something different than the 
default UTF-8. For non-UTF encoders, there is a strict/lenient option to 
disallow/allow illegal stuff (but then you will get these in your strings).

I can show you how to do that if you want.

Sven

> On 20 Jul 2021, at 10:31, Tim Mackinnon <tim@testit.works> wrote:
> 
> Hi - I’m doing a bit of log file processing with Pharo - and I’ve hit an 
> unexpected error and am wondering what the best way to approach it is.
> 
> It seems that I have a log file that has unexpected characters, and so my 
> readStream loop that reads lines gets an error: "ZnInvalidUTF8: Illegal 
> continuation byte for utf-8 encoding”.
> 
> For some reason this file (unlike my others) seems to contain characters that 
> it shouldn’t - but what is the best way for me to continue processing? Should 
> I be opening my files in a different way - or can I resume the error somehow- 
> I’m not familiar with this area of Pharo and am after a bit of advice.
> 
> My code is like this (and I get the error when doing nextLine)
> 
> 
> parseStream: aFileStream with: aBlock
>       | line items |
>       [ (line := aFileStream nextLine) isNil ]
>               whileFalse: [ 
>                       items := $/ split: line.
>                       items size = 3 ifTrue: [aBlock value: items]]
> 
> My stream is created like this:
> 
> firmEfs := (pathName , '/' , firmName , '_files') asFileReference.
> details parseStream: firmEfs readStream.
> 
> 
> Should I be opening the stream a bit differently - or can I catch that 
> encoding error and resume it with some safe character?
> 
> Thanks for any help.
> 
> Tim

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