JSP 页面 POST 请求上的 HTTP 错误 415 但适用于 PHP

Question

我不确定我能做些什么来查看我的 POST 请求有什么问题。我使用 CURL 库在 PHP 中制作了一个快速原型来构建我的请求。当我尝试在 JSP 页面中执行相同的功能时，我收到 HTTP 错误 415。我不确定如何修复它。我在 PHP 页面和 Web 调试器（提琴手）上都得到了正确的结果，没有错误。我还能够使用我正在使用的 REST api 的另一部分在此 JSP 页面上成功执行获取请求。我该怎么做才能找到问题？

这是JSP代码

String xmlRequest = "<viewParameters><vslText>[field1] = '01510486'</vslText></viewParameters>";
try
{
    URL url = new URL("*****");
    HttpURLConnection conn = (HttpURLConnection)url.openConnection();

    //Connection Properties
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);
    conn.setFollowRedirects(true);

    //Header Parameters
    conn.addRequestProperty("X-IntegrationServer-Username", "******");
    conn.addRequestProperty("X-IntegrationServer-Password", "*******");
    conn.setRequestProperty("ContentType", "application/xml");
    conn.setRequestProperty("Host", "*********");
    conn.setRequestProperty("Content", "viewParameters");
    conn.setRequestProperty("Accept", "application/xml");

    //Post Parameter
    OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
    writer.write(xmlRequest);

    conn.connect();

    //CHECK HTML RESPONSE 
    out.print("<br>Response code = " + conn.getResponseCode());
    out.print("<br>Response message = " + conn.getResponseMessage() + "<br><br>");

    //Output Here
    InputStream input = conn.getInputStream();

    //Takes XML and puts it into one string variable
    BufferedReader inputReader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    StringBuilder sb = new StringBuilder();
    String inline = "";
    while ((inline = inputReader.readLine()) != null) {
      sb.append(inline);
    }


    inputReader.close(); 

    out.print(sb.toString());

    } catch (Exception e) {
e.printStackTrace();
}

这是有效的 PHP 代码

<?php 

$curl = curl_init();

//xml to send to server
$xmlRequest = "<viewParameters><vslText>[field1] = '********'</vslText></viewParameters>";

//took out 'Content-Length: ' . strlen($xmlRequest)
$requestParam = array('X-IntegrationServer-Username: ********', 'X-IntegrationServer-Password: ************', 'Host: *************', 'Content-Type: application/xml', 'Content: viewParameters');

curl_setopt($curl, CURLOPT_HTTPHEADER, $requestParam);

curl_setopt($curl , CURLOPT_URL, '***************');

//stops SSL errors but also turns off security for it check this link   http://stackoverflow.com/questions/21187946/60-ssl-certificate-self-signed-certificate-in-certificate-chainbool
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $xmlRequest); 
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

$response = curl_exec($curl);

//if no response comes through tries to give error message
if(!$response){
    die('Error: "' . curl_error($curl) . '" - Code: ' . curl_errno($curl));
}

curl_close($curl);

$xml = simplexml_load_string($response);

Answer 1

记住破折号.....

conn.setRequestProperty("ContentType", "application/xml");

应该是

conn.setRequestProperty("Content-Type", "application/xml");