使用libxml和XSD文件在Perl中验证XML [英] Validating XML in Perl with libxml and an XSD file

问题描述

我试图让我的perl脚本从在线获取Xxml文件并根据XSD文件对其进行验证.

I am trying to have my perl script get an Xxml file from online and validate it according to an XSD file.

执行此操作的代码如下:

The code to do this is as follows:

my $url = shift @ARGV;
my $response = $ua->get($url) || die "Can't fetch file";
my $file = $response->content;

my $schema_file = "schema.xsd";
my $schema = XML::LibXML::Schema->new(location => $schema_file);
my $parser = XML::LibXML->new;
my $doc    = $parser->parse_string($file);
eval { $schema->validate($doc) };
die $@ if $@;

运行此命令会导致一个神秘错误:元素cropdata内容检查失败"(cropdata是我的第一个非root标记).

Running this results in a cryptic error: "Element cropdata content check failure" (cropdata is the first of my nonroot tags).

在我的XSD文件中，该条目如下所示:

In my XSD file, the entry looks like:

<xs:element name="cropdata">
<xs:complexType>
<xs:sequence>

然后是一堆">" 然后:

Then a bunch of "<xs:element..../>" and then:

</xs:sequence>
</xs:complexType>
</xs:element>

进入perl调试器显示，让"my $doc = $parser->parse_string($file);"行运行后，$ doc打印为XML :: LibXML :: Document = SCALAR(0x6b99f0).

Going into the perl debugger shows that after letting the line "my $doc = $parser->parse_string($file);" run, $doc prints as XML::LibXML::Document=SCALAR(0x6b99f0).

任何人都可以帮助我了解我做错了什么吗? (警告:这可能是一个愚蠢的错误，我不会自己说了.)

Can anyone help me shed light on what I am doing wrong? (Warning: it may be a dumb mistake, I wouldn't put it past myself).

推荐答案

结果证明，我提供的示例xml文件无效，瞧瞧，在xmllint中对其进行检查和更正后，一切正常.

Turns out that the sample xml file I had been provided was invalid, and lo and behold, upon checking and correcting it in xmllint, everything works.

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