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我正在尝试执行以下代码：

function post(url, options) {
if(options.query) {
    url += "?";
    var delimiter = "";
    for(var propName in (options.query||{})) {
        url += (delemiter + (propName + "=" + escape(options.query[propName])));
        delimiter = "&";
    }
}
document.write("Fetching " + url);
var code;

var body = options.body;
if(body == null) {
    throw {message:"Body is required"};
}

try {

    // Open Connection
    connection = new java.net.URL(url).openConnection();

    // Set timeout
    var timeout = options.timeout != null ? options.timeout : 10000;
    connection.setReadTimeout(timeout);
    connection.setConnectTimeout(timeout);

    // Method == POST
    connection.setRequestMethod("POST");

    // Set Content Type
    var contentType = "text/xml;charset=utf-8";
    connection.setRequestProperty("Content-Type", contentType);
    connection.setRequestProperty("SOAPAction", "login");
    connection.setRequestProperty("User-Agent", "webastra");

    // Set Content Length
    connection.setRequestProperty("Content-Length", body.length);

    // Silly Java Stuff
    connection.setUseCaches (false);
    connection.setDoInput(true);
    connection.setDoOutput(true); 

    //Send Post Data
    bodyWriter = new java.io.DataOutputStream(connection.getOutputStream());
    bodyWriter.writeBytes(body);
    bodyWriter.flush ();
    bodyWriter.close (); 

    code = connection.getResponseCode();

}
catch(e) {
    throw {message:("Socket Exception or Server Timeout: " + e), code:0};
}
if(code < 200 || code > 299) {
    throw {message:("Received non-2XX response: " + code), code:code};
}
 var is = null;
try {

    importPackage(java.io, java.net, javax.xml.xpath, org.xml.sax);
    is = connection.getInputStream();
    var str = new String(org.apache.commons.io.IOUtils.toString(is));

    var paths = "//serverUrl";
    var ips = new InputSource(is);
    var xPath = XPathFactory.newInstance().newXPath();
    ret = xPath.evaluate(paths, ips);

    document.write(" succ:" + ret);
    return str;
}
catch(e) {
    document.write("Failed to read server response" + e);
}
finally {
    try {if(is != null)is.close();} catch (err){}
}

}

 post("https://abc.com/services/Soap/c/28.0", {body : "<?xml     version=\"1.0\" encoding=\"utf-8\"?> <soap:Envelope    xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"  xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"   xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"   xmlns:tns=\"urn:enterprise.soap.sforce.com\"> <soap:Header> <tns:LoginScopeHeader>   <tns:organizationId/> </tns:LoginScopeHeader> </soap:Header> <soap:Body> <tns:login>   <tns:username>abc@3clogic.com</tns:username>   <tns:password>Thursday12gtz</tns:password> </tns:login> </soap:Body>   </soap:Envelope>"});

帖子部分是成功的。但是，当我尝试在变量 ret 中检索 xml 标记“serverUrl”的值时，出现以下错误：

无法读取服务器响应JavaException：javax.xml.xpath.XPathExpressionException：null

我从帖子中检索的 xml 是：

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
              xmlns="urn:enterprise.soap.sforce.com"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
    <loginResponse>
        <result>
            <metadataServerUrl>
               https://na3.salesforce.com/services/Soap/m/28.0/00D50000000IdrE
            </metadataServerUrl>
            <passwordExpired>false</passwordExpired>
            <sandbox>false</sandbox>
            <serverUrl>
                https://na3.salesforce.com/services/Soap/c/28.0/00D50000000IdrE
            </serverUrl>
            <sessionId>
                    00D50000000IdrE!AREAQK4VYXRaHoL_uRvOi.QXXw3ahAt2Cge254wygiW7cr_f6DVa2pDC6g57w5IE
                fidAu3ZRsJFBN5Bwb6DVhF18zKFiVVyT
            </sessionId>
            <userId>00550000001Dd4uAAC</userId>
            <userInfo>
                <accessibilityMode>false</accessibilityMode>
                <currencySymbol>$</currencySymbol>
                <orgAttachmentFileSizeLimit>5242880
                </orgAttachmentFileSizeLimit>
                <orgDefaultCurrencyIsoCode>USD</orgDefaultCurrencyIsoCode>
                <orgDisallowHtmlAttachments>false
                </orgDisallowHtmlAttachments>
                <orgHasPersonAccounts>false</orgHasPersonAccounts>
                <organizationId>00D50000000IdrEEAS</organizationId>
                <organizationMultiCurrency>false</organizationMultiCurrency>
                <organizationName>3CLogic</organizationName>
                <profileId>00e500000017al5AAA</profileId>
                <roleId xsi:nil="true"/>
                <sessionSecondsValid>7200</sessionSecondsValid>
                <userDefaultCurrencyIsoCode xsi:nil="true"/>
                <userEmail>ramana@3clogic.com</userEmail>
                <userFullName>Ramana</userFullName>
                <userId>00550Dd4uAAC</userId>
                <userLanguage>en_US</userLanguage>
                <userLocale>en_US</userLocale>
                <userName>raman@gmail.com.com</userName>
                <userTimeZone>America/New_York</userTimeZone>
                <userType>Standard</userType>
                <userUiSkin>Theme3</userUiSkin>
            </userInfo>
        </result>
    </loginResponse>
</soapenv:Body>
</soapenv:Envelope>
4

1 回答 1

0

当InputStream您尝试解析它时，它已经是“空的”（即读取）：

is = connection.getInputStream();
var str = new String(org.apache.commons.io.IOUtils.toString(is)); // <-- already read

var paths = "//serverUrl";
var ips = new InputSource(is); // <-- now empty
var xPath = XPathFactory.newInstance().newXPath();
ret = xPath.evaluate(paths, ips);

您可以相应地更改您的代码：

var ips = new InputSource(new StringReader(str));
于 2013-09-02T11:40:12.323 回答