Hello.
I wanted to adapt the example of the pico W tcp server to transform it into a web server.
I modified the port by putting port 80, replace the sending of data with the sending of a header
html and a form.
After a few small adaptations, the form is displayed correctly in the browser but when you enter a zone to return the content of the form everything stops with the message "test failed".
In fact the program stops because the pbuf pointer of the tcp_server_recv function is null.
I have the impression that the tcp driver does not transmit the response from the form to the function.
I must be missing a step, or there is a desynchronization between the browser and the server.
Could anyone give me a line of research?
Thanck
This is a one modify function.
I wanted to adapt the example of the pico W tcp server to transform it into a web server.
I modified the port by putting port 80, replace the sending of data with the sending of a header
html and a form.
After a few small adaptations, the form is displayed correctly in the browser but when you enter a zone to return the content of the form everything stops with the message "test failed".
In fact the program stops because the pbuf pointer of the tcp_server_recv function is null.
I have the impression that the tcp driver does not transmit the response from the form to the function.
I must be missing a step, or there is a desynchronization between the browser and the server.
Could anyone give me a line of research?
Thanck
This is a one modify function.
Code:
err_t tcp_server_send_data(void *arg, struct tcp_pcb *tpcb){ char * ligne1= " <!DOCTYPE html> <html> <body>Bienvenue sur le Pico W. <br> <form action=\"./commande\">"; char * ligne2= " <br> Commande : <br><input type=\"Commande\" id=\"commande\" name=\"com\" /> <br> "; char * ligne3=" </form><br><p>LED is {state}</p><br><p>{message}</p><br><form action=\"./stop\"><input type=\"submit\" value=\"STOP\" /></form></body></html>\r\n\r\n"; char * entete="HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"; int tailleent=strlen(entete); TCP_SERVER_T *state = (TCP_SERVER_T*)arg; for(int i=0; i< tailleent; i++) { state->buffer_sent[i] = entete[i]; } DEBUG_printf("message = %s\n",state->buffer_sent); state->sent_len = 0; DEBUG_printf("Writing %ld bytes to client\n", BUF_SIZE); // this method is callback from lwIP, so cyw43_arch_lwip_begin is not required, however you // can use this method to cause an assertion in debug mode, if this method is called when // cyw43_arch_lwip_begin IS needed cyw43_arch_lwip_check(); err_t err = tcp_write(tpcb, state->buffer_sent, tailleent, TCP_WRITE_FLAG_COPY); if (err != ERR_OK) { DEBUG_printf("Failed to write data %d\n", err); return tcp_server_result(arg, -1); } sleep_ms(1000); //*state = arg; int taille1=strlen(ligne1); for(int i=0; i< taille1; i++) { state->buffer_sent[i] = ligne1[i]; } int taille2=strlen(ligne2); for(int i=0; i< taille2; i++) { state->buffer_sent[taille1+i] = ligne2[i]; } int taille3=strlen(ligne3); for(int i=0; i< taille3; i++) { state->buffer_sent[taille1+taille2+i] = ligne3[i]; } int taille=taille1+taille2+taille3; DEBUG_printf("Taille message= %ld bytes \n", taille); DEBUG_printf("message = %s\n",state->buffer_sent); state->sent_len = 0; DEBUG_printf("Writing %ld bytes to client\n", BUF_SIZE); // this method is callback from lwIP, so cyw43_arch_lwip_begin is not required, however you // can use this method to cause an assertion in debug mode, if this method is called when // cyw43_arch_lwip_begin IS needed cyw43_arch_lwip_check(); err = tcp_write(tpcb, state->buffer_sent, taille, TCP_WRITE_FLAG_COPY); if (err != ERR_OK) { DEBUG_printf("Failed to write data %d\n", err); return tcp_server_result(arg, -1); } sleep_ms(5000); return ERR_OK;}Statistics: Posted by VincentARM — Sun Feb 11, 2024 9:04 pm — Replies 0 — Views 23