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POWeird problem reading XML from URL
 

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  1. POWeird problem reading XML from URL
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    <p>Here's my code:</p> <pre><code> string url = @"http://eafsys:1234/vp.xml"; try { XmlTextReader reader = new XmlTextReader(url); while (reader.Read()) { // do whatever.. } } catch (Exception ex) { Console.WriteLine(ex.Message); } </code></pre> <p>When I run it I catch the following error:</p> <p>'The server committed a protocol violation. Section=ResponseStatusLine'</p> <p>I searched the internet and apparently I am supposed to change some web.config file in my IIS. The thing is the system where the XML data comes from doesn't have IIS, it doesn't even have a web server. It's just a program listening on that port waiting to output XML.</p> <p>I can surf (with a any browser, I.E or FireFox) to <a href="http://eafsys:1234/vp.xml" rel="nofollow">http://eafsys:1234/vp.xml</a> and I get nicely formatted XML. </p> <p>Here is the raw (source view) of the XML:</p> <pre><code>&lt;?xml version="1.0" encoding="ISO-8859-1" ?&gt; &lt;EAFSTATUS&gt; &lt;EAST&gt; &lt;HEAT_NO&gt;100633&lt;/HEAT_NO&gt; &lt;GRADE&gt;EA174 &lt;/GRADE&gt; &lt;HEATSTATUS&gt;MELT&lt;/HEATSTATUS&gt; &lt;CHARGENUM&gt;2&lt;/CHARGENUM&gt; &lt;CRMTEMP&gt;1657&lt;/CRMTEMP&gt; &lt;CRMC&gt; 0.0519&lt;/CRMC&gt; &lt;CHARGE&gt;178000&lt;/CHARGE&gt; &lt;ENERGY&gt;80710&lt;/ENERGY&gt; &lt;ELECTKWH&gt;46400&lt;/ELECTKWH&gt; &lt;POWERONTIME&gt; 33:18&lt;/POWERONTIME&gt; &lt;POWERSTATUS&gt;OFF&lt;/POWERSTATUS&gt; &lt;DELAYDUR&gt;3:18&lt;/DELAYDUR&gt; &lt;DELAYSTATUS&gt;OPEN &lt;/DELAYSTATUS&gt; &lt;DELAYREASON&gt; NO REASON &lt;/DELAYREASON&gt; &lt;/EAST&gt; &lt;WEST&gt; &lt;HEAT_NO&gt;100632&lt;/HEAT_NO&gt; &lt;GRADE&gt;EA174 &lt;/GRADE&gt; &lt;HEATSTATUS&gt;REF &lt;/HEATSTATUS&gt; &lt;CHARGENUM&gt;2&lt;/CHARGENUM&gt; &lt;CRMTEMP&gt;1529&lt;/CRMTEMP&gt; &lt;CRMC&gt; 0.0418&lt;/CRMC&gt; &lt;CHARGE&gt;178500&lt;/CHARGE&gt; &lt;ENERGY&gt;95010&lt;/ENERGY&gt; &lt;ELECTKWH&gt;54500&lt;/ELECTKWH&gt; &lt;POWERONTIME&gt; 39:06&lt;/POWERONTIME&gt; &lt;POWERSTATUS&gt;OFF&lt;/POWERSTATUS&gt; &lt;DELAYDUR&gt;&lt;/DELAYDUR&gt; &lt;DELAYSTATUS&gt;&lt;/DELAYSTATUS&gt; &lt;DELAYREASON&gt;&lt;/DELAYREASON&gt; &lt;/WEST&gt; &lt;LMF_EAST&gt; &lt;HEAT_NO&gt;100631&lt;/HEAT_NO&gt; &lt;GRADE&gt;EA719 &lt;/GRADE&gt; &lt;HEATSTATUS&gt;DONE&lt;/HEATSTATUS&gt; &lt;LMF_TIME&gt; 58:48&lt;/LMF_TIME&gt; &lt;TEMP&gt;1546&lt;/TEMP&gt; &lt;WT&gt;163100&lt;/WT&gt; &lt;SAMP&gt;M03&lt;/SAMP&gt; &lt;SAMP_S&gt;0.005760&lt;/SAMP_S&gt; &lt;CAO&gt;0&lt;/CAO&gt; &lt;AL2O3&gt;0&lt;/AL2O3&gt; &lt;/LMF_EAST&gt; &lt;LMF_WEST&gt; &lt;HEAT_NO&gt;100632&lt;/HEAT_NO&gt; &lt;GRADE&gt;EA174 &lt;/GRADE&gt; &lt;HEATSTATUS&gt;REF &lt;/HEATSTATUS&gt; &lt;LMF_TIME&gt; 47:42&lt;/LMF_TIME&gt; &lt;TEMP&gt;1566&lt;/TEMP&gt; &lt;WT&gt;167500&lt;/WT&gt; &lt;SAMP&gt;M02&lt;/SAMP&gt; &lt;SAMP_S&gt;0.000000&lt;/SAMP_S&gt; &lt;CAO&gt;0&lt;/CAO&gt; &lt;AL2O3&gt;0&lt;/AL2O3&gt; &lt;/LMF_WEST&gt; &lt;CASTER&gt; &lt;HEATNUM&gt;100631&lt;/HEATNUM&gt; &lt;OUTBOARDHEATNUM&gt;0&lt;/OUTBOARDHEATNUM&gt; &lt;CASTSPEED&gt;1.295000&lt;/CASTSPEED&gt; &lt;CASTWIDTH&gt;1.365312&lt;/CASTWIDTH&gt; &lt;REMAININGWEIGHT&gt;66714&lt;/REMAININGWEIGHT&gt; &lt;NEXTTIME&gt;15:20:13.00&lt;/NEXTTIME&gt; &lt;HEATDUR&gt;55&lt;/HEATDUR&gt;&lt;LADLESINSERVICE&gt;4&lt;/LADLESINSERVICE&gt;&lt;/CASTER&gt; &lt;/EAFSTATUS&gt; </code></pre> <p>If anyone has any idea's I'd love to hear them.</p>
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    1. COI'm guessing that the `XmlTextReader.Read()` function is looking for a proper HTTP status code.
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    2. COI'd suggest to download the XML with WebClient first and then load it into XmlReader as Stream...
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    3. COI guess there's more to implementing an HTTP server than just listening on port 80 and waiting to output XML.
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      1. USConrad Frix
 

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