From c527d4dc995a2e7d4f88abc3ab05b62c82ad1446 Mon Sep 17 00:00:00 2001
From: Laurent <44267323+laurentdong@users.noreply.github.com>
Date: Mon, 18 Feb 2019 15:41:40 -0500
Subject: [PATCH] Support HttpGet command

HttpGet command send a HTTP Get request to specified URL and return the response from website or error message if failed.
Note: This command support URL encoding, so you do not have to do encode by yourself. For example replacing all " " with %20 is no necessary.
Format:
httpget <url>
With HttpGet command you can do a lot of things.
For example:
- Retrieve your physical location:
httpget http://ipinfo.io/geo
Result is a JSON object
{
  "ip": "8.8.8.8",
  "city": "Mountain View",
  "region": "California",
  "country": "US",
  "loc": "37.3860,-122.0840",
  "postal": "94035",
  "phone": "650"
}
- Control another Sonoff switch directly:
httpget http://192.168.1.130/cm?cmnd=power off
---
 sonoff/i18n.h     |  1 +
 sonoff/sonoff.ino | 33 +++++++++++++++++++++++++++++++--
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/sonoff/i18n.h b/sonoff/i18n.h
index 7340a3484..f601b1095 100644
--- a/sonoff/i18n.h
+++ b/sonoff/i18n.h
@@ -272,6 +272,7 @@
   #define D_JSON_GPIO "GPIO"
   #define D_JSON_FLAG "FLAG"
   #define D_JSON_BASE "BASE"
+#define D_CMND_HTTP_GET "HttpGet"
 
 // Commands xdrv_01_mqtt.ino
 #define D_CMND_MQTTHOST "MqttHost"
diff --git a/sonoff/sonoff.ino b/sonoff/sonoff.ino
index e54c23260..3ce445a4b 100755
--- a/sonoff/sonoff.ino
+++ b/sonoff/sonoff.ino
@@ -75,7 +75,7 @@ enum TasmotaCommands {
   CMND_MODULE, CMND_MODULES, CMND_GPIO, CMND_GPIOS, CMND_PWM, CMND_PWMFREQUENCY, CMND_PWMRANGE, CMND_COUNTER, CMND_COUNTERTYPE,
   CMND_COUNTERDEBOUNCE, CMND_BUTTONDEBOUNCE, CMND_SWITCHDEBOUNCE, CMND_SLEEP, CMND_UPGRADE, CMND_UPLOAD, CMND_OTAURL, CMND_SERIALLOG, CMND_SYSLOG,
   CMND_LOGHOST, CMND_LOGPORT, CMND_IPADDRESS, CMND_NTPSERVER, CMND_AP, CMND_SSID, CMND_PASSWORD, CMND_HOSTNAME,
-  CMND_WIFICONFIG, CMND_FRIENDLYNAME, CMND_SWITCHMODE, CMND_INTERLOCK, CMND_TEMPLATE,
+  CMND_WIFICONFIG, CMND_FRIENDLYNAME, CMND_SWITCHMODE, CMND_INTERLOCK, CMND_TEMPLATE, CMND_HTTP_GET,
   CMND_TELEPERIOD, CMND_RESTART, CMND_RESET, CMND_TIMEZONE, CMND_TIMESTD, CMND_TIMEDST, CMND_ALTITUDE, CMND_LEDPOWER, CMND_LEDSTATE,
   CMND_I2CSCAN, CMND_SERIALSEND, CMND_BAUDRATE, CMND_SERIALDELIMITER, CMND_DRIVER };
 const char kTasmotaCommands[] PROGMEM =
@@ -85,7 +85,7 @@ const char kTasmotaCommands[] PROGMEM =
   D_CMND_MODULE "|" D_CMND_MODULES "|" D_CMND_GPIO "|" D_CMND_GPIOS "|" D_CMND_PWM "|" D_CMND_PWMFREQUENCY "|" D_CMND_PWMRANGE "|" D_CMND_COUNTER "|" D_CMND_COUNTERTYPE "|"
   D_CMND_COUNTERDEBOUNCE "|" D_CMND_BUTTONDEBOUNCE "|" D_CMND_SWITCHDEBOUNCE "|" D_CMND_SLEEP "|" D_CMND_UPGRADE "|" D_CMND_UPLOAD "|" D_CMND_OTAURL "|" D_CMND_SERIALLOG "|" D_CMND_SYSLOG "|"
   D_CMND_LOGHOST "|" D_CMND_LOGPORT "|" D_CMND_IPADDRESS "|" D_CMND_NTPSERVER "|" D_CMND_AP "|" D_CMND_SSID "|" D_CMND_PASSWORD "|" D_CMND_HOSTNAME "|"
-  D_CMND_WIFICONFIG "|" D_CMND_FRIENDLYNAME "|" D_CMND_SWITCHMODE "|" D_CMND_INTERLOCK "|" D_CMND_TEMPLATE "|"
+  D_CMND_WIFICONFIG "|" D_CMND_FRIENDLYNAME "|" D_CMND_SWITCHMODE "|" D_CMND_INTERLOCK "|" D_CMND_TEMPLATE "|" D_CMND_HTTP_GET "|"
   D_CMND_TELEPERIOD "|" D_CMND_RESTART "|" D_CMND_RESET "|" D_CMND_TIMEZONE "|" D_CMND_TIMESTD "|" D_CMND_TIMEDST "|" D_CMND_ALTITUDE "|" D_CMND_LEDPOWER "|" D_CMND_LEDSTATE "|"
   D_CMND_I2CSCAN "|" D_CMND_SERIALSEND "|" D_CMND_BAUDRATE "|" D_CMND_SERIALDELIMITER "|" D_CMND_DRIVER;
 
@@ -1018,6 +1018,35 @@ void MqttDataHandler(char* topic, uint8_t* data, unsigned int data_len)
       }
       snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_NVALUE, command, Settings.pwm_frequency);
     }
+    else if (CMND_HTTP_GET == command_code) {
+      //Test http get
+      if (data_len > 10 && strncasecmp_P(dataBuf, PSTR("HTTP://"),7) == 0) {
+        String sUrl = dataBuf;
+        String sResult = "";
+        WiFiClient client;
+        HTTPClient http;
+        if (http.begin(client, UrlEncode(dataBuf))) {  // HTTP
+          // start connection and send HTTP header
+          int httpCode = http.GET();
+
+          // httpCode will be negative on error
+          if (httpCode > 0) {
+            // HTTP header has been send and Server response header has been handled
+            // file found at server
+            if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
+              sResult = http.getString();
+            }
+          } else {
+            //Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
+            sResult = http.errorToString(httpCode);
+          }
+          http.end();
+        } else {
+          sResult = "[HTTP} Unable to connect\n";
+        }
+        snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_SVALUE, command, sResult.c_str());
+      }
+    }
     else if (CMND_PWMRANGE == command_code) {
       if ((1 == payload) || ((payload > 254) && (payload < 1024))) {
         Settings.pwm_range = (1 == payload) ? PWM_RANGE : payload;