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/*
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Credential.ino, 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
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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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// Specified the offset if the user data exists.
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// The following two lines define the boundalyOffset value to be supplied to
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// AutoConnectConfig respectively. It may be necessary to adjust the value
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// accordingly to the actual situation.
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#define CREDENTIAL_OFFSET 0
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//#define CREDENTIAL_OFFSET 64
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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 PROGMEM html[] = R"*lit(
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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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.menu > a:link {
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position: absolute;
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display: inline-block;
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right: 12px;
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padding: 0 6px;
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text-decoration: none;
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}
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</style>
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</head>
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<body>
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<div class="menu">{{AUTOCONNECT_MENU}}</div>
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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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</body>
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</html>
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)*lit";
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static const char PROGMEM autoconnectMenu[] = { AUTOCONNECT_LINK(BAR_24) };
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// URL path as '/'
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PageElement elmList(html,
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{{ "SSID", viewCredential },
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{ "AUTOCONNECT_MENU", [](PageArgument& args) {
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return String(FPSTR(autoconnectMenu));} }
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});
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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(CREDENTIAL_OFFSET);
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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(CREDENTIAL_OFFSET);
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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 - 1, &entry); // A base of entry num is 0.
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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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// Set an address of the credential area.
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AutoConnectConfig Config;
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Config.boundaryOffset = CREDENTIAL_OFFSET;
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Portal.config(Config);
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// Start
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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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