allow downgrade to HTTP 1.0

use HTTP/1.0 for update since the update handler not support any transfer Encoding

Author: Links2004

libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp

@@ -41,6 +41,7 @@ HTTPClient::HTTPClient() {
 
     _reuse = false;
     _tcpTimeout = HTTPCLIENT_DEFAULT_TCP_TIMEOUT;
+    _useHTTP10 = false;
 
     _https = false;
 
@@ -266,6 +267,16 @@ void HTTPClient::setTimeout(uint16_t timeout) {
     }
 }
 
+
+
+/**
+ * use HTTP1.0
+ * @param timeout
+ */
+void HTTPClient::useHTTP10(bool useHTTP10) {
+     _useHTTP10 = useHTTP10;
+}
+
 /**
  * send a GET request
  * @return http code
@@ -757,10 +768,17 @@ bool HTTPClient::sendHeader(const char * type) {
         return false;
     }
 
-    String header = String(type) + " " + _url + " HTTP/1.1\r\n"
+    String header = String(type) + " " + _url + " HTTP/1.";
+
+    if(_useHTTP10) {
+        header += "0";
+    } else {
+        header += "1";
+    }
+
+    header += "\r\n"
             "Host: " + _host + "\r\n"
             "User-Agent: " + _userAgent + "\r\n"
-            "Accept-Encoding: identity;q=1 chunked;q=0.1 *;q=0\r\n"
             "Connection: ";
 
     if(_reuse) {
@@ -770,6 +788,10 @@ bool HTTPClient::sendHeader(const char * type) {
     }
     header += "\r\n";
 
+    if(!_useHTTP10) {
+        header += "Accept-Encoding: identity;q=1 chunked;q=0.1 *;q=0\r\n";
+    }
+
     if(_base64Authorization.length()) {
         header += "Authorization: Basic " + _base64Authorization + "\r\n";
     }

libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h

@@ -137,6 +137,8 @@ class HTTPClient {
         void setAuthorization(const char * auth);
         void setTimeout(uint16_t timeout);
 
+        void useHTTP10(bool usehttp10 = true);
+
         /// request handling
         int GET();
         int POST(uint8_t * payload, size_t size);
@@ -180,6 +182,7 @@ class HTTPClient {
         uint16_t _port;
         bool _reuse;
         uint16_t _tcpTimeout;
+        bool _useHTTP10;
 
         String _url;
         bool _https;

libraries/ESP8266httpUpdate/src/ESP8266httpUpdate.cpp

@@ -146,6 +146,9 @@ t_httpUpdate_return ESP8266HTTPUpdate::handleUpdate(HTTPClient * http, const cha
 
     t_httpUpdate_return ret = HTTP_UPDATE_FAILED;
 
+    // use HTTP/1.0 for update since the update handler not support any transfer Encoding
+    http->useHTTP10(true);
+    http->setTimeout(8000);
     http->setUserAgent("ESP8266-http-Update");
     http->addHeader("x-ESP8266-STA-MAC", WiFi.macAddress());
     http->addHeader("x-ESP8266-AP-MAC", WiFi.softAPmacAddress());