Details
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Bug
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Resolution: Duplicate
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P2: Important
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None
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5.5.1
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None
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windows
Description
It was 2 weeks that i tried to connect an ESP8266 as websocket client to a qt server.
But connection failed server never answer to my client handshake.
I tried different server in python an java that worked. Yesterday handshake was successful after i connect a second client (using the websocket echo website). I think there is a trouble in the testing of the end of the http header.
In fact my esp code is:
client->tcp.write("GET "); client->tcp.write(client->cUrl.c_str(), client->cUrl.length()); client->tcp.write(" HTTP/1.1\r\n" "Host: "); client->tcp.write(_host.c_str(), _host.length()); client->tcp.write("\r\n" "Upgrade: websocket\r\n" "Connection: Upgrade\r\n" "User-Agent: arduino-WebSocket-Client\r\n" "Sec-WebSocket-Version: 13\r\n" "Sec-WebSocket-Protocol: arduino\r\n" // todo add api to set Protocol of Server "Sec-WebSocket-Key: "); client->tcp.write(client->cKey.c_str(), client->cKey.length()); client->tcp.write("\r\n"); if(client->cExtensions.length() > 0) { client->tcp.write("Sec-WebSocket-Extensions: "); client->tcp.write(client->cExtensions.c_str(), client->cExtensions.length()); client->tcp.write("\r\n"); } // Header end wait for Server response client->tcp.write("\r\n");
I think that Qt library dislike the fact that the tcp atomicity is not respect for the last "\r\n""\r\n" end of header.
If it can help i send you log of my handshake:
process(4): {GET } process(1): {/} process(17): { HTTP/1.1 Host: } process(12): {192.168.0.13} process(160): { Upgrade: websocket Connection: Upgrade User-Agent: arduino-WebSocket-Client Sec-WebSocket-Version: 13 Sec-WebSocket-Protocol: arduino Sec-WebSocket-Key: } process(24): {pbEvnd/byGV1KbV0dmCgaA==} process(2): { } process(2): { }
I modify the esp library with the following code:
String http_header; http_header="GET "+client->cUrl+" HTTP/1.1\r\n"; http_header+="Host: "+_host+"\r\n"; http_header+="Upgrade: websocket\r\n"; http_header+="Connection: Upgrade\r\n"; http_header+="User-Agent: arduino-WebSocket-Client\r\n"; http_header+="Sec-WebSocket-Version: 13\r\n"; http_header+="Sec-WebSocket-Protocol: arduino\r\n"; http_header+="Sec-WebSocket-Key: "+client->cKey+"\r\n"; if(client->cExtensions.length() > 0) { http_header+="Sec-WebSocket-Extensions: "+client->cExtensions+"\r\n"; } http_header+="\r\n"; client->tcp.write(http_header.c_str(), http_header.length());
and now it's work. I think that there is a problem in the frame cutting since connection is not rejected, no errror are detected and handshake is not detected.
Hope to help community
Attachments
Issue Links
- duplicates
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QTBUG-48184 QWebSocketServer disconnects a client if HTTP handshake arrives in multiple TCP segments
- Closed