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From Mark Horninger <>
Subject Solr throws 400 from proxy but returns fine from browser.
Date Thu, 30 Jul 2015 12:54:04 GMT

I am trying to work around a CORS issue on my app server side by standing up a proxy jsp in
order to talk to Solr directly.  It's really just a request forwarder at this point in time.
 The problem is that the same query I run through the proxy works fine through the browser,
but when I run it in the proxy it always returns a 400.

I've tried to do some initial research, but I am coming up empty.  Can any one please shed
some light on the situation?

Some code snippets:
var queryStr = '(Line1:Tom OR Line2:Tom OR Line3:Tom)';
var dataUrl = 'http://[snip!]:8983/solr/[snip!]/query?&q=' + queryStr + '&fl=Field0,
Field1+, Line2, Line3, Line4, Line5, Line6, Line7, Field8, Field9, Field10 ...';

var strURL = 'proxy.jsp?dataUrl=' + encodeURIComponent(dataUrl);
    var xmlHttpReq = false;
    if (window.XMLHttpRequest) {
        xmlHttpReq = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }'GET', strURL, true);
    xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlHttpReq.onreadystatechange = function() {
        if (xmlHttpReq.readyState == 4) {
            var temp = xmlHttpReq.responseText;
            var refinedData = JSON.stringify(JSON.parse(temp);

And the proxy call:
String dataUrl = request.getParameter("dataUrl");
      dataUrl = URLDecoder.decode(dataUrl);
      URL obj = new URL(dataUrl);
      HttpURLConnection con = (HttpURLConnection) obj.openConnection();

      // optional default is GET
      con.setRequestProperty("Accept", "application/json");

      int responseCode = con.getResponseCode();

I'm not sure why exactly this call is failing with a 400.  Any help that could be provided
would be welcomed.

Thanks in advance!

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