如何找到隐藏的白色 space，或 "Net::HTTP.post_form" 内的换行 XML？

Question

我正在使用 ruby gem Net::HTTP.post_form 到 post XML 到 ConnectWise 服务器，使用公司 API。我收到此错误：

System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1.

根据我能找到的所有内容，我可能在 <?xml version="1.0" encoding="utf-8"?>

之前有一个白色 space 或换行符

代码如下：

require 'net/http'
require 'uri'
require 'builder'

#f = File.new('cw.get_company.xml', 'w')
@cwhostname = 'cw_fqdn'
companyapi_url = 'https://' + @cwhostname + '/v4_6_release/apis/2.0/CompanyApi.asmx'
uri = URI(companyapi_url)

def cw_company_api_get_company
  companyid = 'company_name'
  integratorloginid = 'inegrator_login_id'
  integratorpassword = 'inegrator_passwd'
  companyidint = 0

  xml = Builder::XmlMarkup.new(:indent=>2)
  xml.instruct!
  xml.tag!('soap:Envelope'){
    xml.tag!('soap:Body'){
      xml.tag!('GetCompany xmlns="https://'+@cwhostname+'"'){
        xml.tag!('credentials'){
          xml.CompanyId(companyid)
          xml.IntegratorLoginId(integratorloginid)
          xml.IntegratorPassword(integratorpassword)
        }
      }
      xml.id(companyidint)
    }
  }
end

response = Net::HTTP.post_form(uri,[cw_company_api_get_company])
#puts cw_company_api_get_company
puts response.body

这里是完整的错误输出：

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><soap:Code><soap:Value>soap:Receiver</soap:Value></soap:Code><soap:Reason><soap:Text xml:lang="en">System.Web.Services.Protocols.SoapException: Server was unable to process request. ---&gt; System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1.
   at System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
   at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   at System.Web.Services.Protocols.SoapServerProtocol.SoapEnvelopeReader.Read()
   at System.Xml.XmlReader.MoveToContent()
   at System.Web.Services.Protocols.SoapServerProtocol.SoapEnvelopeReader.MoveToContent()
   at System.Web.Services.Protocols.SoapServerProtocolHelper.GetRequestElement()
   at System.Web.Services.Protocols.Soap12ServerProtocolHelper.RouteRequest()
   at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean&amp; abortProcessing)
   --- End of inner exception stack trace ---</soap:Text></soap:Reason><soap:Detail /></soap:Fault></soap:Body></soap:Envelope>

如果我只是打印到一个文件，它看起来没问题，我如何找到白色的 space 或换行符（或任何其他可能位于第 1 行的内容）并将其删除？

这是 ConnectWise API 文档中提供的示例 XML：

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <GetCompany xmlns="http://connectwise.com">
      <credentials>
        <CompanyId>string</CompanyId>
        <IntegratorLoginId>string</IntegratorLoginId>
        <IntegratorPassword>string</IntegratorPassword>
      </credentials>
      <id>int</id>
    </GetCompany>
  </soap:Body>
</soap:Envelope>

Answer 1

与空格无关。您的 XML 完全不正确。问题出在字符串中：

xml.tag!('GetCompany xmlns="https://'+@cwhostname+'"')

它显然将整个字符串视为一个标记，生成结束标记为：

</GetCompany xmlns="https://connectwise.com">

您可以通过 puts cw_company_api_get_company 在代码中的任何地方轻松看到这一点。属性将传递给构建器标签：

xml.tag!('GetCompany', :xmlns => "https://#{@cwhostname}")

另一个问题是您需要将 id 放在 GetCompany 标签内。总结：

def cw_company_api_get_company
  companyid = 'company_name'
  integratorloginid = 'inegrator_login_id'
  integratorpassword = 'inegrator_passwd'
  companyidint = 0

  xml = Builder::XmlMarkup.new(:indent=>2)
  xml.instruct!
  xml.tag!('soap:Envelope'){
    xml.tag!('soap:Body'){
      xml.tag!('GetCompany', :xmlns => "https://#{@cwhostname}"){
        xml.tag!('credentials'){
          xml.CompanyId(companyid)
          xml.IntegratorLoginId(integratorloginid)
          xml.IntegratorPassword(integratorpassword)
        }
        xml.id(companyidint)
      }
    }
  }
end

希望对您有所帮助。

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