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/**
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* AutoConnect for ESP8266.
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* https://github.com/Hieromon/AutoConnect
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* Copyright 2018, Hieromon Ikasamo.
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* Licensed under The MIT License.
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* https://opensource.org/licenses/mit-license.php
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* An example sketch for an Arduino library for ESP8266 WLAN configuration
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* via the Web interface. This sketch provides a conservation measures
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* utility for saved credentials in EEPROM.
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* By accessing the root path, you can see the list of currently saved
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* credentials via the browser. Enter an entry number of the credential,
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* that entry will be deleted from EEPROM.
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* This sketch uses PageBuilder to support handling of operation pages.
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*/
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#include <ESP8266WiFi.h>
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#include <ESP8266WebServer.h>
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#include <AutoConnect.h>
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#include <AutoConnectCredential.h>
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#include <PageBuilder.h>
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ESP8266WebServer Server;
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AutoConnect Portal(Server);
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String viewCredential(PageArgument&);
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String delCredential(PageArgument&);
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/**
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* An HTML for the operation page.
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* In PageBuilder, the token {{SSID}} contained in an HTML template below is
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* replaced by the actual SSID due to the action of the token handler's
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* 'viewCredential' function.
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* The number of the entry to be deleted is passed to the function in the
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* POST method.
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*/
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static const char html[] PROGMEM = {
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"<!DOCTYPE html>"
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"<html>"
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"<head>"
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"<meta charset=\"UTF-8\" name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
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"<style>"
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"html {"
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"font-family:Helvetica,Arial,sans-serif;"
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"-ms-text-size-adjust:100%;"
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"-webkit-text-size-adjust:100%;"
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"}"
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"a:link, a:visited {"
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"background-color: #2f4f4f;"
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"border-radius: 4px;"
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"color: white;"
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"display: inline-block;"
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"padding: 6px 12px;"
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"text-align: center;"
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"text-decoration: none;"
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"}"
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"a:hover, a:active {"
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"background-color: #132020;"
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"}"
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"</style>"
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"</head>"
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"<body>"
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"<form action=\"/del\" method=\"POST\">"
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"<ol>"
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"{{SSID}}"
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"</ol>"
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"<p>Enter deleting entry:</p>"
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"<input type=\"number\" min=\"1\" name=\"num\">"
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"<input type=\"submit\">"
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"</form>"
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"<p><a href=\"" AUTOCONNECT_URI "\">Menu</a></p>"
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"</body>"
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"</html>"
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};
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// URL path as '/'
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PageElement elmList(html, {{ "SSID", viewCredential }});
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PageBuilder rootPage("/", { elmList });
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// URL path as '/del'
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PageElement elmDel("{{DEL}}", {{ "DEL", delCredential }});
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PageBuilder delPage("/del", { elmDel });
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// Retrieve the credential entries from EEPROM, Build the SSID line
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// with the <li> tag.
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String viewCredential(PageArgument& args) {
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AutoConnectCredential ac;
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struct station_config entry;
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String content = "";
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uint8_t count = ac.entries(); // Get number of entries.
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for (int8_t i = 0; i < count; i++) { // Loads all entries.
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ac.load(i, &entry);
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// Build a SSID line of an HTML.
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content += String("<li>") + String((char *)entry.ssid) + String("</li>");
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}
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// Returns the '<li>SSID</li>' container.
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return content;
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}
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// Delete a credential entry, the entry to be deleted is passed in the
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// request parameter 'num'.
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String delCredential(PageArgument& args) {
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AutoConnectCredential ac;
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if (args.hasArg("num")) {
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int8_t e = args.arg("num").toInt();
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if (e > 0) {
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struct station_config entry;
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// If the input number is valid, delete that entry.
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int8_t de = ac.load(e, &entry);
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if (de > 0) {
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ac.del((char *)entry.ssid);
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// Returns the redirect response. The page is reloaded and its contents
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// are updated to the state after deletion. It returns 302 response
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// from inside this token handler.
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Server.sendHeader("Location", String("http://") + Server.client().localIP().toString() + String("/"));
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Server.send(302, "text/plain", "");
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Server.client().flush();
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Server.client().stop();
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// Cancel automatic submission by PageBuilder.
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delPage.cancel();
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}
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}
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}
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return "";
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}
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void setup() {
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delay(1000);
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Serial.begin(115200);
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Serial.println();
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rootPage.insert(Server); // Instead of Server.on("/", ...);
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delPage.insert(Server); // Instead of Server.on("/del", ...);
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if (Portal.begin()) {
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Serial.println("WiFi connected: " + WiFi.localIP().toString());
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}
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}
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void loop() {
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Portal.handleClient();
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}
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