m263A的TCP例子

#include <algorithm>

#include "mbed.h"

#include "mbed_stats.h"

#include "TCPSocket.h"



#define MBED_HEAP_STATS_ENABLED 1

#define USE_HTTP_1_1

//#define LOCAL_LAN



namespace {

    // Test connection information

#ifndef LOCAL_LAN

const char *HTTP_SERVER_NAME = "www.ifconfig.io"; 

#else

const char *HTTP_SERVER_NAME = "pt22_winserver2.nuvoton.com";

#endif



#ifndef LOCAL_LAN

const char *HTTP_SERVER_FILE_PATH = "/method";

const int HTTP_SERVER_PORT = 80;

#else

const char *HTTP_SERVER_FILE_PATH = "/examples/arm_mbed/method.txt";

const int HTTP_SERVER_PORT = 8080;

#endif





    const int RECV_BUFFER_SIZE = 512;



    // Test related data

    const char *HTTP_OK_STR = "200 OK";

    const char *HTTP_EXPECT_STR = "GET";



    // Test buffers

    char buffer[RECV_BUFFER_SIZE] = {0};

}



bool find_substring(const char *first, const char *last, const char *s_first, const char *s_last) {

    const char *f = std::search(first, last, s_first, s_last);

    return (f != last);

}



int main() {

#if MBED_HEAP_STATS_ENABLED

    mbed_stats_heap_t heap_stats;

#endif



#ifdef MBED_MAJOR_VERSION

    printf("Mbed OS version %d.%d.%d\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);

#endif



    printf("Start WiFi test \r\n");

     

    bool result = true;

    int rc = 0;



    printf("Start Connection ... \r\n");



    NetworkInterface *network_interface = NetworkInterface::get_default_instance();

    if (NULL == network_interface) {

        printf("NULL network interface! Exiting application....\r\n");

        return 0;

    }



    printf("\n\rUsing WiFi \r\n");

    printf("\n\rConnecting to WiFi..\r\n");

    rc = network_interface->connect();

    if(rc == 0) {

        printf("\n\rConnected to Network successfully\r\n");

    } else {

        printf("\n\rConnection to Network Failed %d! Exiting application....\r\n", rc);

        return 0;

    }    

    

    SocketAddress a;

    network_interface->get_ip_address(&a);

    printf("TCP client IP Address is %s\r\n", a.get_ip_address());

    

    //TCPSocket sock(network_interface);

    TCPSocket sock;

    sock.open(network_interface);



    printf(" HTTP Connection ... \r\n");

    network_interface->gethostbyname(HTTP_SERVER_NAME, &a);

    a.set_port(HTTP_SERVER_PORT);

    if (sock.connect(a) == 0) {    

        printf("HTTP: Connected to %s:%d\r\n", HTTP_SERVER_NAME, HTTP_SERVER_PORT);



        // We are constructing GET command like this:

#ifndef USE_HTTP_1_1

        // GET http://www.ifconfig.io/method HTTP/1.0\n\n

        strcpy(buffer, "GET http://");

        strcat(buffer, HTTP_SERVER_NAME);

        strcat(buffer, HTTP_SERVER_FILE_PATH);

        strcat(buffer, " HTTP/1.0\n\n");       

#else

       // GET /method HTTP/1.1\r\nHost: ifconfig.io\r\nConnection: close\r\n\r\n"

        strcpy(buffer, "GET ");

        strcat(buffer, HTTP_SERVER_FILE_PATH);   

        strcat(buffer, " HTTP/1.1\r\nHost: ");

        strcat(buffer, HTTP_SERVER_NAME);

        strcat(buffer, "\r\nConnection: close\r\n\r\n");

#endif

        

        // Send GET command

        sock.send(buffer, strlen(buffer));



        // Server will respond with HTTP GET's success code

        const int ret = sock.recv(buffer, sizeof(buffer) - 1);

        buffer[ret] = '\0';

        

        // Find 200 OK HTTP status in reply

        bool found_200_ok = find_substring(buffer, buffer + ret, HTTP_OK_STR, HTTP_OK_STR + strlen(HTTP_OK_STR));

        // Find "deny" string in reply

        bool found_expect = find_substring(buffer, buffer + ret, HTTP_EXPECT_STR, HTTP_EXPECT_STR + strlen(HTTP_EXPECT_STR));



        if (!found_200_ok) result = false;

        if (!found_expect) result = false;



        printf("HTTP: Received %d chars from server\r\n", ret);

        printf("HTTP: Received 200 OK status ... %s\r\n", found_200_ok ? "[OK]" : "[FAIL]");

        printf("HTTP: Received '%s' status ... %s\r\n", HTTP_EXPECT_STR, found_expect ? "[OK]" : "[FAIL]");

        printf("HTTP: Received massage:\r\n\r\n");

        printf("%s", buffer);

    }



#if MBED_HEAP_STATS_ENABLED

    mbed_stats_heap_get(&heap_stats);

    printf("Current heap: %lu\r\n", heap_stats.current_size);

    printf("Max heap size: %lu\r\n", heap_stats.max_size);

#endif

 

    printf(" Close socket & disconnect ... \r\n");

    sock.close();



    network_interface->disconnect();

    printf(" End \r\n");

}