Well, I am certainly no expert on HTTP, *but*, if I look at how things
work with my computer, when it requests a packet from my board there is
only the SYN, SYN ACK, ACK handshake before the computer sends the GET
command.
Now, when my board is the client, the issue I have is not [yet] whether
the GET is working properly.
What is happening when lwIP board is client and desktop is server:
If I establish a connection from the board to the desktop and do not
send a GET request, then lwIP does the SYN, SYN ACK, ACK handshake just
fine.
If I add the [potentially incorrect] GET request, the SYNN is sent, the
SYN ACK is received, but my board running lwIP does not send the ACK out
to the desktop.
You may well be totally correct that my GET line is incomplete, I cannot
find any details on exactly how it should be, but I don't think that is
the main issue at the moment. I'm happy to be told I'm talking nonsense
though.
Thanks!
On 13/11/14 11:21, Simon Goldschmidt wrote:
Robert Wood wrote:
Hmmmm. I seem to be wrong, It *does* send out the ACK. I took out these
lines:
strcpy(GetString,"GET /index.html HTTP/1.1\r\n");
netconn_write(xNetConn,GetString,sizeof(GetString),NETCONN_NOCOPY);
As you seem to be trying to implement a HTTP client: are you familiar with the
HTTP protocol? I'm not sure the single line is enough for HTTP 1.1 (it should
be for 0.9), but at least you need a double line-break to inform the server
that this is the end of the HTTP header.
I'd suggest reading a bit more on HTTP.
Simon
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