fixes #974 password placeholder

showPassword()  optional

WiFiManager.cpp

@@ -974,6 +974,13 @@ void WiFiManager::handleWifi(boolean scan) {
 
   pitem = FPSTR(HTTP_FORM_WIFI);
   pitem.replace(FPSTR(T_v), WiFi_SSID());
+
+  if(_showPassword){
+    pitem.replace(FPSTR(T_p), WiFi_psk());
+  }
+  else {
+    pitem.replace(FPSTR(T_p),FPSTR(S_passph));    
+  }
   page += pitem;
 
   page += getStaticOut();
@@ -2195,6 +2202,17 @@ void WiFiManager::setShowDnsFields(boolean alwaysShow){
   _staShowDns = alwaysShow ? 1 : 0;
 }
 
+/**
+ * toggle showing password in wifi password field
+ * if not enabled, placeholder will be S_passph
+ * @since $dev
+ * @access public
+ * @param boolean alwaysShow [false]
+ */
+void WiFiManager::setShowPassword(boolean show){
+  _showPassword = show;
+}
+
 /**
  * toggle captive portal
  * if enabled, then devices that use captive portal checks will be redirected to root

WiFiManager.h

@@ -239,6 +239,8 @@ class WiFiManager
     void          setShowStaticFields(boolean alwaysShow);
     //if true, always show static dns, esle only show if set via setSTAStaticIPConfig
     void          setShowDnsFields(boolean alwaysShow);
+    // toggle showing the saved wifi password in wifi form, could be a security issue.
+    void          setShowPassword(boolean show);
     //if false, disable captive portal redirection
     void          setCaptivePortalEnable(boolean enabled);
     //if false, timeout captive portal even if a STA client connected to softAP (false), suggest disabling if captiveportal is open
@@ -355,6 +357,7 @@ class WiFiManager
     int            _staShowStaticFields   = 0;     // ternary 1=always show static ip fields, 0=only if set, -1=never(cannot change ips via web!)
     int            _staShowDns            = 0;     // ternary 1=always show dns, 0=only if set, -1=never(cannot change dns via web!)
     boolean       _removeDuplicateAPs     = true;  // remove dup aps from wifiscan
+    boolean       _showPassword           = false; // show or hide saved password on wifi form, might be a security issue!
     boolean       _shouldBreakAfterConfig = false; // stop configportal on save failure
     boolean       _configPortalIsBlocking = true;  // configportal enters blocking loop 
     boolean       _enableCaptivePortal    = true;  // enable captive portal redirection

examples/DEV/OnDemandConfigPortal/OnDemandConfigPortal.ino

@@ -192,6 +192,9 @@ void setup() {
   // set AP hidden
   // wm.setAPHidden(true);
 
+  // show password publicly!
+  // wm.setShowPassword(true);
+
   // set configrportal timeout
   wm.setConfigPortalTimeout(120);
   // wm.startConfigPortal("AutoConnectAP", "password");
@@ -202,7 +205,7 @@ void setup() {
   //and goes into a blocking loop awaiting configuration
   
   print_oled(F("Connecting..."),2);  
-  if(!wm.autoConnect("AutoConnectAP")) {
+  if(!wm.autoConnect("WM_AutoConnectAP")) {
     Serial.println("failed to connect and hit timeout");
     print_oled("Not Connected",2);
   }
@@ -211,7 +214,7 @@ void setup() {
     Serial.println("TEST_CP ENABLED");
     // start configportal always
     wm.setConfigPortalTimeout(60);
-    wm.startConfigPortal();
+    wm.startConfigPortal("WM_ConnectAP");
   }
   else {
     //if you get here you have connected to the WiFi

strings_en.h

@@ -47,7 +47,7 @@ const char HTTP_ITEM[]             PROGMEM = "<div><a href='#p' onclick='c(this)
 // const char HTTP_ITEM[]            PROGMEM = "<div><a href='#p' onclick='c(this)'>{v}</a> {R} {r}% {q} {e}</div>"; // test all tokens
 
 const char HTTP_FORM_START[]       PROGMEM = "<form method='POST' action='{v}'>";
-const char HTTP_FORM_WIFI[]        PROGMEM = "<label for='s'>SSID</label><input id='s' name='s' maxlength='32' autocorrect='off' autocapitalize='none' placeholder='{v}'><br/><label for='p'>Password</label><input id='p' name='p' maxlength='64' type='password' placeholder=''>";
+const char HTTP_FORM_WIFI[]        PROGMEM = "<label for='s'>SSID</label><input id='s' name='s' maxlength='32' autocorrect='off' autocapitalize='none' placeholder='{v}'><br/><label for='p'>Password</label><input id='p' name='p' maxlength='64' type='password' placeholder='{p}'>";
 const char HTTP_FORM_WIFI_END[]    PROGMEM = "";
 const char HTTP_FORM_STATIC_HEAD[] PROGMEM = "<hr><br/>";
 const char HTTP_FORM_END[]         PROGMEM = "<br/><br/><button type='submit'>Save</button></form>";
@@ -189,7 +189,7 @@ const char S_disable[]            PROGMEM = "Disabled";
 const char S_GET[]                PROGMEM = "GET";
 const char S_POST[]               PROGMEM = "POST";
 const char S_NA[]                 PROGMEM = "Unknown";
-
+const char S_passph[]             PROGMEM = "********";
 const char S_titlewifisaved[]     PROGMEM = "Credentials Saved";
 const char S_titlewifi[]          PROGMEM = "Config ESP";
 const char S_titleinfo[]          PROGMEM = "Info";