Posted forms are decoded with ISO-8859-1 instead of UTF-8

[rreitmann]

Hi,

after upgrading from 1.3.0.M4 to 1.3.0.M5 form parameter if sent with a POST seem to be decoded with ISO-8859-1 instead of UTF-8. Have there been any changes?

[wilkinsona]

Not knowingly. Can you share a sample project that reproduces the problem?

[rreitmann]

Our project is public: https://github.com/dzhw/metadatamanagement

You can see the described behavior here https://metadatamanagement.cfapps.io/en/variables/create if you put an 'Ü' in label and submit the form.

[wilkinsona]

Thanks. And thanks, too, to @timtebeek.

Unfortunately, the changes made in 2b3d419 have altered the ordering of the auto-configured filters. In M4 the ordering was:

• Character encoding filter
• Hidden HTTP method filter and HTTP put content form filter

In M5 the ordering is:

• Hidden HTTP method filter
• HTTP put content form filter
• Character encoding filter

HiddenHttpMethodFilter accesses the request's parameters so it's vital that it go after CharacterEncodingFilter otherwise the parameters will be read in the wrong encoding.

A workaround is to declare your own OrderedCharacterEncodingFilter bean and ensure that it goes first:

@Autowired
private HttpEncodingProperties httpEncodingProperties;

@Bean
public OrderedCharacterEncodingFilter characterEncodingFilter() {
    OrderedCharacterEncodingFilter filter = new OrderedCharacterEncodingFilter();
    filter.setEncoding(this.httpEncodingProperties.getCharset().name());
    filter.setForceEncoding(this.httpEncodingProperties.isForce());
    filter.setOrder(Ordered.HIGHEST_PRECEDENCE);
    return filter;
}

[wilkinsona]

@dsyer I'm not sure of your motivations for moving OrderedCharacterEncodingFilter's order nearer to zero. Any objections to moving it back to HIGHEST_PRECEDENCE rather than just slightly before the other filters that we auto-configure?

[dsyer]

Don't think so.

[rreitmann]

Thanks for the immediate feedback. We will go with the workaround for the time being and upgrade to 1.3.0.RC1 as soon as it is available.