From f82c5e5d3434005f040d9c1e4eb5280010c9eb68 Mon Sep 17 00:00:00 2001 From: jgrubb Date: Fri, 13 Jul 2007 20:03:25 +0000 Subject: [PATCH] Example application of httpserver for netconn/netbuf. --- apps/httpserver/README | 12 ++++++ apps/httpserver/httpserver-netconn.c | 62 ++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+) create mode 100644 apps/httpserver/README create mode 100644 apps/httpserver/httpserver-netconn.c diff --git a/apps/httpserver/README b/apps/httpserver/README new file mode 100644 index 0000000..1f18bb8 --- /dev/null +++ b/apps/httpserver/README @@ -0,0 +1,12 @@ +HTTPSERVER + +This is a demonstration of how to make the most basic kind +of server using lWIP. + +* httpserver-raw.c - uses raw TCP calls (coming soon!) + +* httpserver-netconn.c - uses netconn and netbuf API + +This code updates the examples in Adam Dunkel's original +lwIP documentation to match changes in the code since that +PDF release. diff --git a/apps/httpserver/httpserver-netconn.c b/apps/httpserver/httpserver-netconn.c new file mode 100644 index 0000000..88b0faf --- /dev/null +++ b/apps/httpserver/httpserver-netconn.c @@ -0,0 +1,62 @@ +const static char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n"; +const static char http_index_html[] = "Congrats!

Welcome to our lwIP HTTP server!

This is a small test page."; + +void http_server_serve(struct netconn *conn) { + struct netbuf *inbuf; + char *buf; + u16_t buflen; + + /* Read the data from the port, blocking if nothing yet there. + We assume the request (the part we care about) is in one netbuf */ + inbuf = netconn_recv(conn); + + if (conn->err == ERR_OK) { + netbuf_data(inbuf, &buf, &buflen); + + /* Is this an HTTP GET command? (only check the first 5 chars, since + there are other formats for GET, and we're keeping it very simple )*/ + if (buflen>=5 && + buf[0]=='G' && + buf[1]=='E' && + buf[2]=='T' && + buf[3]==' ' && + buf[4]=='/' ) { + + /* Send the HTML header + * subtract 1 from the size, since we dont send the \0 in the string + * NETCONN_NOCOPY: our data is const static, so no need to copy it + */ + netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY); + + /* Send our HTML page */ + netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY); + } + } + /* Close the connection (server closes in HTTP) */ + netconn_close(conn); + + /* Delete the buffer (netconn_recv gives us ownership, + so we have to make sure to deallocate the buffer) */ + netbuf_delete(inbuf); +} + +int http_server() { + struct netconn *conn, *newconn; + + /* Create a new TCP connection handle */ + conn = netconn_new(NETCONN_TCP); + LWIP_ERROR("http_server: invalid conn", (conn != NULL), return -1;); + + /* Bind to port 80 (HTTP) with default IP address */ + netconn_bind(conn, NULL, 80); + + /* Put the connection into LISTEN state */ + netconn_listen(conn); + + while(1) { + newconn = netconn_accept(conn); + http_server_serve(newconn); + netconn_delete(newconn); + } + return 0; +}