Was ist eine Chunked-Anfrage in OpenTSDB?

Question

Ich verwende Qt4, um einige Datenpunkte an einen OpenTSDB-Server zu senden, der keine Chunked-HTTP-Anfragen unterstützt.

Der Code ist im Prinzip folgendermaßen aus:

QNetworkRequest request(m_url); 
request.setHeader(QNetworkRequest::ContentTypeHeader, QString("application/json")); 
request.setHeader(QNetworkRequest::ContentLengthHeader, jsonRequest.toAscii().size()); 
m_networkAccessManager.post(request, jsonRequest.toAscii()); 

jsonRequest a QString ist es, die Datenpunkte enthalten. Dieser Code wird von Zeit zu Zeit aufgerufen, um Daten auf den Server hochzuladen. Manchmal erhalte ich jedoch einen Fehler von openTSDB, dass "Chunked Request nicht unterstützt." Dies scheint zu passieren, wenn die Anfrage ein wenig größer wird (und größer, ich meine einige KB Daten).

edit: ich einen tcpdump der Anforderung getan haben, wenn das Problem auftritt, und in der Tat ist es nicht zu chunked gesehen:

POST /api/put HTTP/1.1 
Content-Type: application/json 
Content-Length: 14073 
Connection: Keep-Alive 
Accept-Encoding: gzip 
Accept-Language: en,* 
User-Agent: Mozilla/5.0 
Host: 192.168.xx.xxx:xxxx 

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400 Bad Request 
Content-Length: 1080 
Content-Type: text/html; charset=UTF-8 
Date: Thu, 08 Jan 2015 17:18:43 GMT 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv=content-type content="text/html;charset=utf-8"><title>Bad Request</title> 
<style><!-- 
body{font-family:arial,sans-serif;margin-left:2em}A.l:link{color:#6f6f6f}A.u:link{color:green}.subg{background-color:#e2f4f7}.fwf{font-family:monospace;white-space:pre-wrap}//--></style></head> 
<body text=#000000 bgcolor=#ffffff><table border=0 cellpadding=2 cellspacing=0 width=100%><tr><td rowspan=3 width=1% nowrap><b><font color=#c71a32 size=10>T</font><font color=#00a189 size=10>S</font><font color=#1a65b7 size=10>D</font>&nbsp;&nbsp;</b><td>&nbsp;</td></tr><tr><td class=subg><font color=#507e9b><b>Looks like it's your fault this time</b></td></tr><tr><td>&nbsp;</td></tr></table><blockquote><h1>Bad Request</h1>Sorry but your request was rejected as being invalid.<br/><br/>The reason provided was:<blockquote>Chunked request not supported.</blockquote></blockquote><table width=100% cellpadding=0 cellspacing=0><tr><td class=subg><img alt="" width=1 height=6></td></tr></table></body></html> 

Ich dachte Qt eine Chunked verwenden veränderte Anfrage, wenn die Anfrage größer wurde, aber das ist nicht der Fall. Die aktuelle Frage lautet also: Was ist eine Chunked-Anfrage in openTSDB?

Answer 1

Ich habe endlich den Grund gefunden, meiner Meinung nach ist meine Anfrage Chunked: OpenTSDB intern Netty zum Netzwerkbetrieb, und wenn Netty liest einen Block, der nicht die vollständige Anfrage enthält, dann wird es als Chunked markiert, auch wenn es keine gibt Transfer-Encoding-Header in der Anfrage.

Es gibt zwei mögliche Lösungen:

• Hinzufügen „tsd.http.request.enable_chunked = true“ in die Konfigurationsdatei, so dass es nicht gestückelt Anfragen verwirft und das Hinzufügen von „tsd.http .request.max_chunk = "in der Konfigurationsdatei, und es auf eine vernünftige Größe für Ihre Anfragen
Einstellung
• Wenn Sie den Client ändern können, es Anfragen zu senden zwingen kleinere

Bitte beachten Sie, dass chunked Anfragen ermöglicht für öffentlich zugängliche Server sind vielleicht keine gute Idee, wie ein ma Licious Client kann unbegrenzte Anfragen senden und den Server überlasten.

Credits geht an irc Benutzer jaylr und manolama, der mir die Info #opentsdb@freenode.net auf IRC-Kanal bereitgestellt