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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
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
- duplicates
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- Closed
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