使用jQuery在Neo4j上执行Cypher查询

Question

使用jQuery在Neo4j上执行Cypher查询

Rem*_*miX 2 javascript ajax rest jquery neo4j

我试图在同一台机器上使用jQuery对一个Neo4j服务器进行Ajax调用,但我一直在响应中出错.

这是我写ajax调用的方式:

var request = $.ajax({
    type: "POST",
    url: "http://localhost:7474/db/data/cypher",
    accepts: "application/json",
    dataType: "json",
    contentType:"application/json",
    data: JSON.stringify({ "query" : "MATCH n RETURN n LIMIT 1", "params": {} })
});

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当我执行此代码时,在FireBug中我看到:

"NetworkError: 400 Bad Request - http://localhost:7474/db/data/cypher"

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在对POST请求的响应中,我找到以下正文:

<html><head><title>Error</title></head><body><p><pre>WebApplicationException
at org.neo4j.server.rest.repr.formats.HtmlFormat.serializeMapping(HtmlFormat.java:348)
at org.neo4j.server.rest.repr.RepresentationFormat.serializeMapping(RepresentationFormat.java:73)
at org.neo4j.server.rest.repr.MappingRepresentation.serialize(MappingRepresentation.java:39)
at org.neo4j.server.rest.repr.OutputFormat.assemble(OutputFormat.java:215)
at org.neo4j.server.rest.repr.OutputFormat.formatRepresentation(OutputFormat.java:147)
at org.neo4j.server.rest.repr.OutputFormat.response(OutputFormat.java:130)
at org.neo4j.server.rest.repr.OutputFormat.ok(OutputFormat.java:67)
at org.neo4j.server.rest.web.CypherService.cypher(CypherService.java:101)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.neo4j.server.rest.transactional.TransactionalRequestDispatcher.dispatch(TransactionalRequestDispatcher.java:139)
at org.neo4j.server.rest.security.SecurityFilter.doFilter(SecurityFilter.java:112)
at java.lang.Thread.run(Thread.java:745)</pre></p></body></html>

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这些是响应标头:

Access-Control-Allow-Origin...      *
Content-Length                      1065
Content-Type                        text/html; charset=UTF-8
Server                              Jetty(9.0.5.v20130815)

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当我在Chrome的Advanced Rest Client中执行相同的请求时,我确实得到了所需的响应.

如何进行我的ajax调用,以便Neo4j从Cypher查询中获得结果？

Answer 1

Ste*_*ter 6

在你提供的代码片段中,Accepts发送了一个Neo4j无法处理的更复杂的标题.我使用了以下代码段:

var request = $.ajax({
    type: "POST",
    url: "http://localhost:7474/db/data/cypher",
    accepts: { json: "application/json" },
    dataType: "json",
    contentType:"application/json",
    data: JSON.stringify({ "query" : "MATCH n RETURN n LIMIT 1", "params": {} })
 });

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既省略,accepts并且dataType似乎工作,以及:

var request = $.ajax({
    type: "POST",
    url: "http://localhost:7474/db/data/cypher",
    contentType:"application/json",
    data: JSON.stringify({ "query" : "MATCH n RETURN n LIMIT 1", "params": {} })
 });

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