Akifumi Takahashi / HTTP_SERVER

The library with which to make your mbed a HTTP Server which just reads HTML files in the mbed and sends it to the clients.

Dependents:   httpserversample SIMPLE_WSS

Quote:

This library depends on EthernetInterface class, TCPSocketServer class and TCPSocketConnection class. These classes can be imported at EthernetInterface library. Moreover, the EthernetInterface library depends on the mbed-rtos library, so import it here.

Abstract

This is the library to make a mbed a simple HTTP server. With this library, a mbed can understand only GET requests, and can send clients htm or jpg files as a response.

Handleable Requests:

  • GET

Handleable files:

  • html
  • jpg

Note the length of the Filename

A mbed can handle only 8.3 filename (also called as "short filename" or SFN), such as index.htm (in this case, length of the filename is 5.3).

Sample Code

Running the code below, if your mbed is connected to a network, you can see an IP address of the mbed on your console. (When connecting the mbed to a PC with USB, the baud rate should be 9600)

Hello World

#include "mbed.h"
#include "HTTP_SERVER.h"
int main()
{
    HttpServer httpsvr;
    if(httpsvr.init()){
        if(httpsvr.run() == 0)
            printf("end\r\n");
        else
            printf("error end\r\n");
    }
    return 0;
}

As an example, make a index.htm like below (NOT .html; the reason is referred above) in the mbed, and access to <the IP address>/index.htm with a web browser on your PC or any terminals on the network the mbed is connected to, then you would be able to see the page.

index.htm in mbed

<!DOCTYPE html>
<html>
<head>
<title>mbed http server demo</title>
</head>
<body>
	<h1>Mbed Simple HTTP Server</h1> 
	hello world<br />
	<a href="./index.htm" terget="self">Hyper Link Test</a><br />
</body>
</html>

Diff: HTTP_SERVER.cpp

Revision:
7:184c6f1ace94
Parent:
6:4eb469f51570
Child:
8:b013075de2e4
diff -r 4eb469f51570 -r 184c6f1ace94 HTTP_SERVER.cpp
--- a/HTTP_SERVER.cpp	Sat Nov 26 19:15:20 2016 +0000
+++ b/HTTP_SERVER.cpp	Mon Nov 28 08:27:42 2016 +0000
@@ -137,15 +137,17 @@
                     if(msger.setHeaderField("Connection", "keep-alive"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
                 } else {
                     if(msger.setStatusLine(404, "NOT FOUND"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
-                    if(msger.setHeaderField("Connection", "close"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
+                    if(msger.setHeaderField("Connection", "Close"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
                     DEBUG_PRINT_LINE("(HTTP_SERVER) NOT FOUND\r\n");
                 }
-                if(     strcmp(fhandl.getSuffix(), "htm" )  ||
-                        strcmp(fhandl.getSuffix(), "HTM" )  ||
-                        strcmp(fhandl.getSuffix(), "html")  ||
-                        strcmp(fhandl.getSuffix(), "HTML")) {
+                if(     !strcmp(fhandl.getSuffix(), "htm" )  ||
+                        !strcmp(fhandl.getSuffix(), "HTM" )  ||
+                        !strcmp(fhandl.getSuffix(), "html")  ||
+                        !strcmp(fhandl.getSuffix(), "HTML")) {
                     if(msger.setHeaderField("Content-Type", "text/html"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
-                } else if (strcmp(fhandl.getSuffix(), "ico" )  ) {
+                } else if(!strcmp(fhandl.getSuffix(), "js" )){
+                    if(msger.setHeaderField("Content-Type", "text/javascript"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
+                } else if (!strcmp(fhandl.getSuffix(), "ico" )  ) {
                     if(msger.setHeaderField("Content-Type", "image/png"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
                 } else {
                     msger.setStatusLine(406, "not acceptable");
@@ -154,104 +156,34 @@
                 //  Connection timeout field
                 if(msger.setHeaderField("Keep-Alive", "timeouit=15"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
 
-                //  Define behaviour of server according to Request Header lines
-                //  Apply request header field to response header field
-                char* field_Connection = NULL;
-                char* field_Upgrade = NULL;
-                char* field_Sec_WebSocket_Key = NULL;
-                char* field_Sec_WebSocket_Version = NULL;
-                char* field_Origin = NULL;
-                do {
-                    //Analyze the header feilds
-                    header_field_name = strtok(NULL, ":");
-                    header_field_name++;
-                    header_field_val  = strtok(NULL, "\r\n");
-                    header_field_val++;
-
-                    if(header_field_name - 1 != NULL) {
-                        if(!strcmp(header_field_name, "Connection")) {
-                            field_Connection = header_field_val;
-                        } else if(!strcmp(header_field_name, "Upgrade")) {
-                            field_Upgrade = header_field_val;
-                        } else if(!strcmp(header_field_name, "Sec-WebSocket-Key") ) {
-                            field_Sec_WebSocket_Key = header_field_val;
-                        } else if(!strcmp(header_field_name, "Sec-WebSocket-Version") ) {
-                            field_Sec_WebSocket_Version = header_field_val;
-                        } else if(!strcmp(header_field_name, "Origin") ) {
-                            field_Origin = header_field_val;
-                        }
-                    } else {
-                        break;
-                    }
-#ifdef DEBUG
-                    printf("(HTTP_SERVER) *header_field_name adr: %d %s\r\n", header_field_name - 1, header_field_name);
-                    printf("(HTTP_SERVER)  header_field_val  adr: %d %s\r\n", header_field_val  - 1, header_field_val);
-#endif
-                } while(1);
-
-                //  if the request is to switching to the WebSocket Server
-                if(!strcmp(field_Connection, "Upgrade")) {
-                    if(     !strcmp(field_Upgrade, "websocket")         &&
-                            field_Sec_WebSocket_Key != NULL             &&
-                            !strcmp(field_Sec_WebSocket_Version, "13")  &&
-                            field_Origin != NULL) {
-                        DEBUG_PRINT_LINE("(HTTP_SERVER) Communication Protocol will be Upgraded to Websocket! \r\n");
-                        /*
-                        if(ws.isValid()){
-                            ...//calcurate the key
-                            msger.resetHeader();
-                            msger.setStatusLine(101, "Switching Protocols");
-                            if(msger.msger.setHeaderField("Connection", "Upgrade"))             printf("(HTTP_SERVER)buffer over flow@ResposeMessenger");
-                            if(msger.msger.setHeaderField("Upgrade", "websocket"))              printf("(HTTP_SERVER)buffer over flow@ResposeMessenger");
-                            if(msger.msger.setHeaderField("Sec-WebSocket-Accept", ...))         printf("(HTTP_SERVER)buffer over flow@ResposeMessenger");
-                            if(msger.msger.setHeaderField("Access-Control-Allow-Origin", "*"))  printf("(HTTP_SERVER)buffer over flow@ResposeMessenger");
-                        }
-                        else goto AAA;
-                        */
-                    } else {
-                        //AAA:
-                        DEBUG_PRINT_LINE("(HTTP_SERVER) Communication Protocol won't be Upgraded.\r\n");
-                        msger.setStatusLine(426, "Upgrade Required");
-                        if(msger.setHeaderField("Connection", "Close"))printf("(HTTP_SERVER)buffer over flow @ ResponseMessenger");
-                    }
-                }
-
-
-#ifdef DEBUG
-                //printf("status code :  %d\r\n", status_code);
-                //printf("content type:  %s\r\n", content_type);
-#endif
-
                 //  send response
                 msger.sendHTTPResponse(tcpcon, fhandl);
 
                 //file close
-#ifdef DEBUG
-                if(
-#endif
-                    fhandl.close()
-#ifndef DEBUG
-                    ;
-#endif
-#ifdef DEBUG
-                    == 0)
-                    printf("(HTTP_SERVER) file has closed\r\n");
+                if( fhandl.close()== 0)
+                    DEBUG_PRINT_LINE("(HTTP_SERVER) file has closed\r\n");
                 else if(EOF)
-                    printf("(HTTP_SERVER) failed to close the file\r\n");
-#endif
+                    DEBUG_PRINT_LINE("(HTTP_SERVER) failed to close the file\r\n");
+                    
+                msger.resetHeader();
+                printf("(HTTP_SERVER) echo back done.\r\n");
+            }
+            if (httpmethod == NULL) {
+                msger.sendHTTPResponse(tcpcon);
                 msger.resetHeader();
                 printf("(HTTP_SERVER) echo back done.\r\n");
             }
-            if (strcmp(httpmethod, NULL) == 0 ) {
-                msger.sendHTTPResponse(tcpcon);
-            }
             printf("(HTTP_SERVER) Response to Request has done\r\n");
+            //
+            //
+            //
         }
         printf("(HTTP_SERVER) close connection.\r\ntcp server is listening...\r\n");
         tcpcon.close();
-        //tcpsvr.close();
         led2 = false;
     }
+    tcpsvr.close();
+    listening_flag = false;
     led1 = false;
     return 0;
 }
\ No newline at end of file