Added cgi

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.19)
+cmake_minimum_required(VERSION 3.18)
 
 find_package(Perl)
 if(NOT PERL_FOUND)

src/CMakeLists.txt

@@ -14,7 +14,7 @@ execute_process(COMMAND
         WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
         ECHO_OUTPUT_VARIABLE
         ECHO_ERROR_VARIABLE
-        COMMAND_ERROR_IS_FATAL ANY
+#        COMMAND_ERROR_IS_FATAL ANY
         )
 file(RENAME fsdata.c my_fsdata.c)
 
@@ -37,7 +37,7 @@ target_link_libraries(${PROGRAM_NAME}
         )
 
 pico_enable_stdio_usb(${PROGRAM_NAME} TRUE)
-pico_enable_stdio_uart(${PROGRAM_NAME} FALSE)
+pico_enable_stdio_uart(${PROGRAM_NAME} TRUE)
 suppress_tinyusb_warnings()
 
 pico_add_extra_outputs(${PROGRAM_NAME})

src/cgi.h

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2023 Gerhard Schiller ([email protected])
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * https://www.gnu.org/licenses/gpl-3.0.txt
+ *
+ * This code is based on parts of the file: "LwIP/LwIP_HTTP_Server_Raw/Src/httpd_cg_ssi.c"
+ *
+ *
+ * For details see the copyright notice below.
+ *
+ * Note: this STMicroelectronics software component has no LICENSE file
+ * in its root directory.
+ *
+ */
+
+
+/**
+  ******************************************************************************
+  * @file    LwIP/LwIP_HTTP_Server_Raw/Src/httpd_cg_ssi.c
+  * @author  MCD Application Team
+  * @brief   Webserver SSI and CGI handlers
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2017 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+#include "lwip/apps/httpd.h"
+#include "pico/cyw43_arch.h"
+#include "lwipopts.h"
+
+
+#include <string.h>
+#include <stdlib.h>
+
+// GPIOs for Leds
+#define LED1	18
+#define LED2	19
+#define LED3	20
+#define LED4	21
+
+
+/* CGI handler for LED control */
+const char * LEDS_CGI_Handler(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
+/* CGI handler for LED control with feedback*/
+const char * LEDS_CGI_Handler2(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
+
+/* Html request for "/leds.cgi" will start LEDS_CGI_Handler */
+const tCGI LEDS_CGI={"/leds.cgi", LEDS_CGI_Handler};
+/* Html request for "/leds2.cgi" will start LEDS_CGI_Handler2 */
+const tCGI LEDS_CGI2={"/leds2.cgi", LEDS_CGI_Handler2};
+
+/* Cgi call table, two CGI used */
+tCGI CGI_TAB[2];
+
+void LED_On(int led){
+	printf("GPIO%d on\n", led);
+	gpio_put(led, 1);
+}
+
+void LED_Off(int led){
+	printf("GPIO%d off\n", led);
+	gpio_put(led, 0);
+}
+
+const char * LEDS_CGI_Handler(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
+{
+	int i=0;
+
+	/* First SSI handler iIndex = 0 (see CGI_TAB[] in cgi_init() )*/
+	if (iIndex==0)
+	{
+		/* All leds off */
+		LED_Off(LED1);
+		LED_Off(LED2);
+		LED_Off(LED3);
+		LED_Off(LED4);
+
+		/* Check cgi parameter : application GET /leds.cgi?led=2&led=4 */
+		for (i=0; i<iNumParams; i++){
+			/* check parameter "led" */
+			if (strcmp(pcParam[i] , "led") == 0){
+				/* switch led1 ON if 1 */
+				if(strcmp(pcValue[i], "1") == 0)
+					LED_On(LED1);
+
+				/* switch led2 ON if 2 */
+				else if(strcmp(pcValue[i], "2") == 0)
+					LED_On(LED2);
+
+				/* switch led3 ON if 3 */
+				else if(strcmp(pcValue[i], "3") == 0)
+					LED_On(LED3);
+
+				/* switch led4 ON if 4 */
+				else if(strcmp(pcValue[i], "4") == 0)
+					LED_On(LED4);
+			}
+		}
+	}
+	/* uri to send after cgi call*/
+	return "/cgi.html";
+}
+
+const char * LEDS_CGI_Handler2(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
+{
+	int i=0;
+
+	/* Second SSI handler iIndex = 1 (see CGI_TAB[] in cgi_init() )*/
+	if (iIndex==1)
+	{
+		/* All leds off */
+		LED_Off(LED1);
+		LED_Off(LED2);
+		LED_Off(LED3);
+		LED_Off(LED4);
+
+		/* Check cgi parameter : application GET /leds.cgi?led=2&led=4 */
+		for (i=0; i<iNumParams; i++){
+			/* check parameter "led" */
+			if (strcmp(pcParam[i] , "led") == 0){
+				/* switch led1 ON if 1 */
+				if(strcmp(pcValue[i], "1") == 0)
+					LED_On(LED1);
+
+				/* switch led2 ON if 2 */
+				else if(strcmp(pcValue[i], "2") == 0)
+					LED_On(LED2);
+
+				/* switch led3 ON if 3 */
+				else if(strcmp(pcValue[i], "3") == 0)
+					LED_On(LED3);
+
+				/* switch led4 ON if 4 */
+				else if(strcmp(pcValue[i], "4") == 0)
+					LED_On(LED4);
+			}
+		}
+	}
+	/* uri to send after cgi call*/
+	return "/ssi_cgi.shtml";
+}
+
+void cgi_init(void)
+{
+	/* configure CGI handler */
+	CGI_TAB[0] = LEDS_CGI;
+	CGI_TAB[1] = LEDS_CGI2;
+	http_set_cgi_handlers(CGI_TAB, 2);
+
+	for(int i = LED1; i <= LED4; i++){
+		gpio_init(i);
+		gpio_set_dir(i, GPIO_OUT);
+		gpio_put(i, 0);
+	}
+}

src/fs/cgi.html

@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+    <head> <title>Pico W CGI-PAGE</title> </head>
+    <body> <h1>Pico W</h1>
+    <h3>CGI-PAGE</h3>
+
+	<span>
+	This page allows you to control four leds: LED1, LED2, LED3 and LED4 connected to GPIO18 - 21<br><br>
+	To turn a led on/off check/uncheck its corresponding checkbox.<br>
+	Then click on the "Send" button to submit the changes.<br>
+	</span>
+	<br>
+	<form method="get" action="/leds.cgi">
+		<input value="1" name="led" type="checkbox">LED1<br>
+		<input value="2" name="led" type="checkbox">LED2<br>
+		<input value="3" name="led" type="checkbox">LED3<br>
+		<input value="4" name="led" type="checkbox">LED4<br>
+		<br>
+		<input value="Send" type="submit">
+	</form>
+	<br>
+	<br>
+    <a href="/index.html">Back</a>
+	</body>
+</html>

src/fs/index.html

@@ -3,5 +3,11 @@
     <head> <title>Pico W</title> </head>
     <body> <h1>Pico W</h1>
         <p>Hello World</p>
-    </body>
-</html>
+        <br>
+        <br>
+        <br>
+        <a href="/ssi.shtml">&nbsp;ssi-page: Counter and Voltage</a><br>
+        <a href="/cgi.html">&nbsp;cgi-page: Ledcontrol</span></a><br>
+        <a href="/ssi_cgi.shtml">&nbsp;cgi-page: Ledcontrol with feedback</span></a><br>
+   </body>
+</html>

src/fs/ssi.shtml

@@ -1,8 +1,13 @@
 <!DOCTYPE html>
 <html>
-    <head> <title>Pico W</title> </head>
-    <body> <h1>Pico W</h1>
+    <head> <title>Pico W SSI-PAGE</title> </head>
+    <body>
+    <h1>Pico W</h1>
+    <h3>SSI-PAGE</h3>
         <p><!--#Hello--> Times <!--#counter-->!</p>
         <p>GPIO26 voltage is: <!--#GPIO-->!</p>
+	<br>
+	<br>
+    <a href="/index.html">Back</a>
     </body>
-</html>
+</html>

src/fs/ssi_cgi.shtml

@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+    <head> <title>Pico W CGI-SSI-PAGE</title> </head>
+    <body> <h1>Pico W</h1>
+    <h3>CGI with Feedback (ssi) PAGE</h3>
+
+	<span>
+	This page allows you to control four leds: LED1, LED2, LED3 and LED4 connected to GPIO18 - 21<br><br>
+	To turn a led on/off check/uncheck its corresponding checkbox.<br>
+	Then click on the "Send" button to submit the changes.<br>
+	</span>
+	<br>
+	<form method="get" action="/leds2.cgi">
+		<input value="1" name="led" type="checkbox" <!--#state1-->>
+			<span style=<!--#bg1-->>LED1</span><br>
+		<input value="2" name="led" type="checkbox" <!--#state2-->>
+			<span style=<!--#bg2-->>LED2</span><br>
+		<input value="3" name="led" type="checkbox" <!--#state3-->>
+			<span style=<!--#bg3-->>LED3</span><br>
+		<input value="4" name="led" type="checkbox" <!--#state4-->>
+			<span style=<!--#bg4-->>LED4</span><br>
+		<input value="Send" type="submit">
+	</form>
+	<br>
+	<br>
+    <a href="/index.html">Back</a>
+	</body>
+</html>
+

src/lwipopts.h

@@ -57,6 +57,7 @@
 
 #define LWIP_HTTPD 1
 #define LWIP_HTTPD_SSI 1
+#define LWIP_HTTPD_CGI 1
 // don't include the tag comment - less work for the CPU, but may be harder to debug
 #define LWIP_HTTPD_SSI_INCLUDE_TAG 0
 // use generated fsdata

src/main.cpp

@@ -6,11 +6,13 @@
 #include "pico/cyw43_arch.h"
 
 #include "lwipopts.h"
+#include "cgi.h"
 #include "ssi.h"
 
 void run_server() {
     httpd_init();
     ssi_init();
+	cgi_init();
     printf("Http server initialized.\n");
     // infinite loop for now
     for (;;) {}
@@ -23,9 +25,6 @@ int main() {
         printf("failed to initialise\n");
         return 1;
     }
-    // turn on LED to distinguish from BOOTSEL mode
-    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
-
     cyw43_arch_enable_sta_mode();
     // this seems to be the best be can do using the predefined `cyw43_pm_value` macro:
     // cyw43_wifi_pm(&cyw43_state, CYW43_PERFORMANCE_PM);
@@ -43,6 +42,9 @@ int main() {
         auto ip_addr = cyw43_state.netif[CYW43_ITF_STA].ip_addr.addr;
         printf("IP Address: %lu.%lu.%lu.%lu\n", ip_addr & 0xFF, (ip_addr >> 8) & 0xFF, (ip_addr >> 16) & 0xFF, ip_addr >> 24);
     }
-
+    // turn on LED to signal connected
+    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
+
+
     run_server();
-}
+}

src/ssi.h

@@ -9,10 +9,19 @@
 // max length of the tags defaults to be 8 chars
 // LWIP_HTTPD_MAX_TAG_NAME_LEN
 const char * __not_in_flash("httpd") ssi_example_tags[] = {
-  "Hello",
-  "counter",
-  "GPIO"
+	"Hello",		// 0
+	"counter",	// 1
+	"GPIO",		// 2
+	"state1",		// 3
+	"state2",		// 4
+	"state3",		// 5
+	"state4",		// 6
+	"bg1",		// 7
+	"bg2",		// 8
+	"bg3",		// 9
+	"bg4"		// 10
 };
+
 u16_t __time_critical_func(ssi_handler)(int iIndex, char *pcInsert, int iInsertLen) {
   size_t printed;
   switch (iIndex) {
@@ -32,6 +41,49 @@ u16_t __time_critical_func(ssi_handler)(int iIndex, char *pcInsert, int iInsertL
       printed = snprintf(pcInsert, iInsertLen, "%f", voltage);
     }
     break;
+  case 3: /* "state1" */
+  case 4: /* "state2" */
+  case 5: /* "state3" */
+  case 6: /* "state4" */
+  {
+	  bool state;
+	  if(iIndex == 3)
+		  state = gpio_get(LED1);
+	  else if(iIndex == 4)
+		  state = gpio_get(LED2);
+	  else if(iIndex == 5)
+		  state = gpio_get(LED3);
+	  else if(iIndex == 6)
+		  state = gpio_get(LED4);
+
+	  if(state)
+		  printed = snprintf(pcInsert, iInsertLen, "checked");
+	  else
+		  printed = snprintf(pcInsert, iInsertLen, " ");
+  }
+  break;
+
+  case 7:  /* "bg1" */
+  case 8:  /* "bg2" */
+  case 9:  /* "bg3" */
+  case 10: /* "bg4" */
+  {
+	  bool state;
+	  if(iIndex == 7)
+		  state = gpio_get(LED1);
+	  else if(iIndex == 8)
+		  state = gpio_get(LED2);
+	  else if(iIndex == 9)
+		  state = gpio_get(LED3);
+	  else if(iIndex == 10)
+		  state = gpio_get(LED4);
+
+	  if(state)
+		  printed = snprintf(pcInsert, iInsertLen, "\"background-color:green;\"");
+	  else
+		  printed = snprintf(pcInsert, iInsertLen, "\"background-color:red;\"");
+  }
+  break;
   default: /* unknown tag */
     printed = 0;
     break;