Question

我想通过Nodejs将三元组插入到Virtuoso内的图形中。所以，首先我用CURL命令检查它，它正在工作。现在我想尝试使用nodejs代码，但它不工作，也没有显示任何错误.... 这是参考：对于curl命令（以下网页中的示例2）：

http://docs.openlinksw.com/virtuoso/rdfinsertmethodshttppost/

对于Node.js，代码为：

＆＃13;

var triples = 

"http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>"+
  "<http://rdfs.org/sioc/ns#User> ."+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://www.w3.org/2000/01/rdf-schema#label>"+
  "<Kingsley Uyi Idehen> ."+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://rdfs.org/sioc/ns#creator_of> <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/weblog/kidehen@openl"+"inksw.com%27s%20BLOG%20%5B127%5D/1300>";
    var myData= JSON.stringify("INSERT IN GRAPH <http://mygraph.org>  { "+triples+" }";
            
    var header = {
                  'Content-Type': "application/sparql-query",
                  'Content-Length': Buffer.byteLength(myData)
                 };
             
     var options = {
                  host: localhost,
                  port: 8890,
                  auth: 'dba:dba',
                  path: '/DAV/home/dba/rdf_sink/mydata',
                  method: 'POST',
                  headers: header
              };
              
     var req = http.request(options, function(res) {
                  res.setEncoding('utf-8');
                  var responseString = '';
                  res.on('data', function(data) {
                     console.log('On data:' + data);
                  });
                  res.on('end', function() {});
              });
              req.on('error', function(e) {
                  console.log('On Error:' + e);
              });
    req.write(myData);
    req.end();

＆＃13;

代码没有显示错误，但也没有在virtuoso数据库中插入任何三元组。请建议..

Answer 1

首先，内联数据中仍存在错误。你有 -

var triples = 

"http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>"+
  "<http://rdfs.org/sioc/ns#User> ."+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://www.w3.org/2000/01/rdf-schema#label>"+
  "<Kingsley Uyi Idehen> ."+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this>"+
  "<http://rdfs.org/sioc/ns#creator_of> <http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/weblog/kidehen@openl"+"inksw.com%27s%20BLOG%20%5B127%5D/1300>";

文字包含在<>而不是""中;第一个URI缺少开头<;一些可能在语法上重要的空白缺失...

应该成为（为了便于阅读而进行一些额外的空格调整） -

var triples = 

  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this> "+
     "<http://www.w3.org/1999/02/22-rdf-syntax-ns#type> "+
        "<http://rdfs.org/sioc/ns#User> . "+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this> "+
     "<http://www.w3.org/2000/01/rdf-schema#label> "+
        "\"Kingsley Uyi Idehen\" . "+
  "<http://www.openlinksw.com/dataspace/person/kidehen@openlinksw.com#this> "+
     "<http://rdfs.org/sioc/ns#creator_of> "+
        "<http://www.openlinksw.com/dataspace/kidehen@openlinksw.com/weblog"+
           "/kidehen@openlinksw.com%27s%20BLOG%20%5B127%5D/1300> . ";

我原本期望你的原始文件导致一些错误输出（可能在Virtuoso日志文件中找到，虽然它可能在node.js交互中的某处被抑制/丢弃），而不是静默失败;不过，上述情况可能会解决问题。

virtuoso通过nodejs代码插入三元组

1 个答案: