Added the setCpuFreq() method to change the cpu clock at run time

src/app/CFGFileParser.cpp

@@ -13,15 +13,16 @@ void *CFGFileParser::parseFile()
     CFGDictionary<CFGParameterValue> *dictioRef = new CFGDictionary<CFGParameterValue>;
     char readChar(0), *parsedParameter(NULL), *parsedValue(NULL);
 
+    if(!_sdCardManager.isMounted()) return NULL;
+
     file = _sdCardManager.open(_resource);
     if(!file)
     {
       delete dictioRef;
-      file.close();
       return NULL;
     }
 	
-	_state = INIT;
+	  _state = INIT;
     while(file.available())
     {
       readChar = (char)file.read();
@@ -167,17 +168,18 @@ void *CFGFileParser::parseFile()
 
 boolean CFGFileParser::save(void *data)
 {
-  if(data == NULL)
-	return false;
+  if(data == NULL) return false;
+   
   Dictionary<CFGParameterValue> *ref = (Dictionary<CFGParameterValue> *) data;
-  int truncateHere(0);
+  uint64_t truncateHere(0);
   char readChar(0);
+
+  if(!_sdCardManager.isMounted()) return NULL;
   
   File file = _sdCardManager.open(_resource, FILE_READWRITE);
   
   if(!file)
   {
-    file.close();
     return false;
   }
   
@@ -187,65 +189,65 @@ boolean CFGFileParser::save(void *data)
   //We find out where to truncate the file
   while(file.available())
   {
-	readChar = (char)file.read();
-	switch(_state)
-	{
-		case INIT:
-			if(readChar == '#')
-			{
-				truncateHere++;
-				_state = COMMENT_SECTION;
-			}
-			else
-				_state = DONE;
-			break;
-		case COMMENT_SECTION:
-			truncateHere++;
-			if(readChar == '\n') _state = LINE_BREAK;
-			break;
-		case LINE_BREAK:
-			truncateHere++;
-			if(readChar == '#')
-                _state = COMMENT_SECTION;
-			else if(readChar == '\n') _state = DONE;
-			break;
-	}
+  	readChar = (char)file.read();
+  	switch(_state)
+  	{
+  		case INIT:
+  			if(readChar == '#')
+  			{
+  				truncateHere++;
+  				_state = COMMENT_SECTION;
+  			}
+  			else
+  				_state = DONE;
+  			break;
+  		case COMMENT_SECTION:
+  			truncateHere++;
+  			if(readChar == '\n') _state = LINE_BREAK;
+  			break;
+  		case LINE_BREAK:
+  			truncateHere++;
+  			if(readChar == '#')
+                  _state = COMMENT_SECTION;
+  			else if(readChar == '\n') _state = DONE;
+  			break;
+  	}
   }
   
   if(!file.truncate(truncateHere))
   {
-	file.close();
-	return false;
+  	file.close();
+  	return false;
   }
   
   //Let's write the settings
   for(int i = 0; i < ref->count(); i++)
   {
-	CFGParameterValue *cfgPV = ref->getAt(i);
-	
-	if(cfgPV->isQuotedParameter())
-	{
-		file.write('\'');
-		file.print(cfgPV->getParameter());
-		file.write('\'');
-	}
-	else
-	{
-		file.print(cfgPV->getParameter());
-	}
-	
-	file.print(F(" : "));
-	
-	if(cfgPV->isQuotedValue())
-	{
-		file.write('\'');
-		file.print(cfgPV->stringValue());
-		file.println('\'');
-	}
-	else
-	{
-		file.println(cfgPV->stringValue());
-	}
+  	CFGParameterValue *cfgPV = ref->getAt(i);
+  	
+  	if(cfgPV->isQuotedParameter())
+  	{
+  		file.write('\'');
+  		file.print(cfgPV->getParameter());
+  		file.write('\'');
+  	}
+  	else
+  	{
+  		file.print(cfgPV->getParameter());
+  	}
+  	
+  	file.print(F(" : "));
+  	
+  	if(cfgPV->isQuotedValue())
+  	{
+  		file.write('\'');
+  		file.print(cfgPV->stringValue());
+  		file.println('\'');
+  	}
+  	else
+  	{
+  		file.println(cfgPV->stringValue());
+  	}
   }
   
   file.close();

src/app/CFGFileParser.h

@@ -7,6 +7,9 @@
 #include "definition.h"
 #include "CFGParameterValue.h"
 
+//Forward class declaration because of cross includes...
+class SDCardManager;
+
 class CFGFileParser : public AbstractParser
 {
 public:

src/app/CFGParameterValue.cpp

@@ -4,6 +4,7 @@ CFGParameterValue::CFGParameterValue():DictionaryInterface(),_parameter(NULL), _
 {
 
 }
+
 CFGParameterValue::CFGParameterValue(const char *parameter, const char *value, boolean quotedParameter, boolean quotedValue):_quotedParameter(quotedParameter), _quotedValue(quotedValue)
 {
     _parameter = (char *) malloc((strlen(parameter) * sizeof(char)) + 1); //+1 for the string terminating character
@@ -12,6 +13,7 @@ CFGParameterValue::CFGParameterValue(const char *parameter, const char *value, b
     strcpy(_parameter, parameter);
     strcpy(_value, value);
 }
+
 CFGParameterValue::CFGParameterValue(const char *parameter, const char *value):CFGParameterValue()
 {
     _parameter = (char *) malloc((strlen(parameter) * sizeof(char)) + 1); //+1 for the string terminating character
@@ -20,6 +22,7 @@ CFGParameterValue::CFGParameterValue(const char *parameter, const char *value):C
     strcpy(_parameter, parameter);
     strcpy(_value, value);
 }
+
 CFGParameterValue::CFGParameterValue(const CFGParameterValue &Object)
 {
     _parameter = (char *) malloc((strlen(Object._parameter) * sizeof(char)) + 1); //+1 for the string terminating character
@@ -31,6 +34,7 @@ CFGParameterValue::CFGParameterValue(const CFGParameterValue &Object)
     _quotedParameter = Object._quotedParameter;
     _quotedValue = Object._quotedValue;
 }
+
 CFGParameterValue::~CFGParameterValue()
 {
     free(_parameter);
@@ -38,3 +42,12 @@ CFGParameterValue::~CFGParameterValue()
     free(_value);
     _value = NULL;
 }
+
+void CFGParameterValue::setValue(const char *value, bool isQuoted)
+{
+  _quotedValue = isQuoted;
+
+  free(_value);_value = NULL;
+  _value = (char *) malloc((strlen(value) * sizeof(char)) + 1); //+1 for the string terminating character
+  strcpy(_value, value);
+}

src/app/CFGParameterValue.h

@@ -29,10 +29,11 @@ public:
     const char *getParameter() const{return _parameter == NULL ? "" : _parameter;}
     const bool isQuotedParameter()const{return _quotedParameter;}
     const bool isQuotedValue()const{return _quotedValue;}
-	virtual const char *toString()
+	  virtual const char *toString()
     {
         return _value;
     }
+    void setValue(const char *value, bool isQuoted);
 protected:
 private:
     char *_parameter;

src/app/PowerManager.cpp

@@ -45,3 +45,8 @@ PowerManager::PowerInfo PowerManager::getPowerInfo(const uint16_t nbOfMeasures)
   
   return p;
 }
+
+bool PowerManager::setCpuFreq(uint8_t frequency)
+{
+  return system_update_cpu_freq(frequency);
+}

src/app/PowerManager.h

@@ -3,6 +3,7 @@
 
 #include "Arduino.h"
 #include "definition.h"
+#include <user_interface.h>
 
 class PowerManager
 {
@@ -20,6 +21,7 @@ class PowerManager
     ~PowerManager();
     
    PowerManager::PowerInfo getPowerInfo(const uint16_t nbOfMeasures = 5) const;
+   bool setCpuFreq(uint8_t frequency);
   protected:
     PowerManager();
   private:

src/app/SDCardManager.cpp

@@ -54,3 +54,9 @@ boolean SDCardManager::isMounted()
 {
   return _mounted;
 }
+
+CFGDictionary<CFGParameterValue> *SDCardManager::getCFGFile(const char *cfgFile)
+{
+  CFGFileParser cfgFileParser(*this, cfgFile);
+  return (CFGDictionary<CFGParameterValue> *) cfgFileParser.parseFile();
+}

src/app/SDCardManager.h

@@ -2,21 +2,29 @@
 #define SDCARDMANAGER_H
 #include <SD.h>
 #include "definition.h"
+#include "CFGDictionary.h"
+#include "CFGParameterValue.h"
+#include "CFGFileParser.h"
 
 class SDCardManager : public SDClass
 {
   friend class SAB;
   public:
     SDCardManager(const Pin csPin, SPISettings cfg);
-    
     double getSize(const SizeUnit sizeUnit = GBYTE);
     boolean mountSD();
     void unMountSD();
-  
     boolean isMounted();
-  
+    /*
+     * Quick way to retrieve the keys and values of a config file.
+     * If you need to performe other actions on the file, you will have to use the CFGFileParser object instead
+     * Remember to free the returned object ie : delete
+     */
+    CFGDictionary<CFGParameterValue> *getCFGFile(const char *cfgFile);
+    
   protected:
     SDCardManager();
+    
   private:
     const Pin _csPin;
     SPISettings _spiCfg;

src/app/WEBServer.h

@@ -14,7 +14,7 @@ class WEBServer : public TCPServer<T>
 		enum HttpRequestMethod {UNDEFINED, GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE, PATCH};
 		enum HttpVersion {UNKNOWN, HTTP_0_9, HTTP_1_1, HTTP_1_0, HTTP_2_0};
 		enum HttpMIMEType{UNKNOWN_MIME, TEXT_PLAIN, TEXT_CSS, TEXT_HTML, TEXT_JAVASCRIPT, APPLICATION_JSON, APPLICATION_X_WWW_FORM_URLENCODED, IMAGE_PNG, IMAGE_JPEG, AUDIO_MPEG, APPLICATION_OCTET_STREAM};
-		enum HttpParserStatus {HTTP_VERB, HTTP_RESSOURCE, HTTP_VERSION, HTTP_PARAMS, POST_DATA};
+		enum HttpParserStatus {HTTP_VERB, HTTP_RESSOURCE, HTTP_VERSION, HTTP_PARAMS, POST_DATA, HEADER_PARAMS};
     enum WEBClientState {ACCEPTED, QUERY_PARSED, RESPONSE_SENT, DONE};
     enum HTTP_CODE {_100, _101, _200, _400, _401, _403, _404, _405, _500, _501};
 
@@ -48,6 +48,18 @@ class WEBServer : public TCPServer<T>
     {
       return _apiDictionary.remove(uri);
     }
+
+    //Helper function used for the webApi
+    static void injectApiHeader(char *header, const char *contentType, char *content)
+    {
+      char *buffer = (char *)malloc(sizeof(char) * strlen(content) + 1);
+      if(buffer != NULL)
+      {
+        strcpy(buffer, content);
+        sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n%s",contentType,strlen(buffer), buffer);
+        free(buffer);
+      }
+    }
 	protected:
 	private:
     virtual T* createNewClient(WiFiClient wc)
@@ -208,12 +220,12 @@ class WEBServer : public TCPServer<T>
               Serial.println((char *)client->_data);
               #endif
               
-              client->_httpParserState = HttpParserStatus::POST_DATA;
+              client->_httpParserState = HttpParserStatus::HEADER_PARAMS;
             }
           }
             break;
           case  HttpParserStatus::HTTP_PARAMS: //index.htm?var1=1&var2=2...
-            if(!httpParamParser(client))
+            if(!httpRsrcParamParser(client))
             {
               #ifdef DEBUG_WEBS
               Serial.print("Resrc : ");Serial.println(client->_httpRequestData.httpResource);
@@ -226,9 +238,62 @@ class WEBServer : public TCPServer<T>
               client->_httpParserState = HttpParserStatus::HTTP_VERSION;
             }
             break;
+          case HttpParserStatus::HEADER_PARAMS: //Here we parse the different header params until we arrive to \r\n\r\n
+            {
+              char *pEndLine = strstr((char *)client->_data, "\r\n");
+
+              if( pEndLine != NULL )
+              {   
+                *pEndLine = '\0';
+
+                httpHeaderParamParser(client);
+                
+                if(*(pEndLine+2) == '\r') //We got \r\n\r\n -> so we go to the post data section
+                {
+                  client->_httpParserState = HttpParserStatus::POST_DATA;
+                  client->freeDataBuffer((pEndLine - (char *)client->_data) +3); //client->_data must not be empty...
+                  break;
+                }
+
+                //Before in the buffer : key1: value1\0\nkey2: value2
+                //After in the buffer : key2: value2\r\n
+                client->freeDataBuffer((pEndLine - (char *)client->_data) + 2);
+              }
+              else //Error : indeed, we should at least have : \r\n. We go to the next step anyway
+              {
+                client->_httpParserState = HttpParserStatus::POST_DATA;
+              }
+            }
+            break;
           case  HttpParserStatus::POST_DATA:
+          
+              switch(client->_httpRequestData.HMT)
+              {
+                case APPLICATION_X_WWW_FORM_URLENCODED:
+                  #ifdef DEBUG_WEBS
+                  Serial.printf("Post data : APPLICATION_X_WWW_FORM_URLENCODED\n");
+                  Serial.printf("Post data : %s\n", client->_data);
+                  #endif
+                  
+                  //we parse it !
+                  if(!httpPostParamParser(client))
+                  {
+                    //Parsing done!
+                    #ifdef DEBUG_WEBS
+                    Serial.println("Post params :");
+                    for(int i = 0; i < client->_httpRequestData.postParams.count(); i++)
+                    {
+                      Serial.print(client->_httpRequestData.postParams.getParameter(i));Serial.print(" : ");Serial.println(client->_httpRequestData.postParams.getAt(i)->getString());
+                    }
+                    #endif
+                    client->_WEBClientState = WEBClientState::QUERY_PARSED;
+                  }
+                  
+                  break;
+                default :
+                  client->_WEBClientState = WEBClientState::QUERY_PARSED;
+              }
               
-              client->_WEBClientState = WEBClientState::QUERY_PARSED;
             break;
           default :
             sendInfoResponse(HTTP_CODE::_500, client, "WEB server error");
@@ -237,7 +302,44 @@ class WEBServer : public TCPServer<T>
         }
     }
 
-    boolean httpParamParser(T *client)
+    /*
+     * This function parses the header parameters in order to find particular parameters.
+     * For example we look for the "Content-Type" header or for the "Range: bytes=" header
+     */
+    void httpHeaderParamParser(T *client)
+    {
+      #ifdef DEBUG_WEBS
+      Serial.printf("Header param : %s\n",(char *)client->_data);
+      #endif
+
+      //Here we check if we have interesting params
+      char *contentTypeP = strstr((char *)client->_data, "t-Type: application/x-www-form-urlen");
+
+      if(contentTypeP != NULL)
+      {
+        #ifdef DEBUG_WEBS
+        Serial.printf("Data is of type : APPLICATION_X_WWW_FORM_URLENCODED\n");
+        #endif
+        client->_httpRequestData.HMT = APPLICATION_X_WWW_FORM_URLENCODED;
+      }
+      
+      //Range part for file downloads
+      /*char *startingP = strstr((char *)client->_data, "nge: bytes="), *endP = strchr((char *)client->_data, '-');
+
+      if(startingP != NULL && endP != NULL)
+      {
+        endP = '\0';
+        client->_range = strtoul(startingP + 11,NULL, 10);
+        #ifdef DEBUG_WEBS
+        Serial.printf("Range : %d\n", client->_range);
+        #endif
+      }*/
+    }
+
+    /*
+     * This function is here to parse resources parameters
+     */
+    boolean httpRsrcParamParser(T *client)
     {
       char *pGetParam = strchr((char *)client->_httpRequestData.httpResource, '?');
       
@@ -264,7 +366,7 @@ class WEBServer : public TCPServer<T>
           *value = '\0';
           
           client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(key > value ? NULL : key + 1));
-          strcpy(client->_httpRequestData.getParamsDataPointer,value+1);
+          memmove(client->_httpRequestData.getParamsDataPointer, value+1, strlen(value+1)+1);
           
           #ifdef DEBUG_WEBS
           Serial.print("Params pointer : ");Serial.println(client->_httpRequestData.getParamsDataPointer);
@@ -283,13 +385,48 @@ class WEBServer : public TCPServer<T>
           *value = '\0';
 
           client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(NULL));
-          strcpy(client->_httpRequestData.getParamsDataPointer,value+1);
+          memmove(client->_httpRequestData.getParamsDataPointer, value+1, strlen(value+1)+1);
         }
       }
       else //nothing to parse or done
       {
         return false;
       }
+
+      return true;
+    }
+
+    boolean httpPostParamParser(T* client)
+    {
+      if(client->_httpRequestData.postParamsDataPointer == NULL)
+      {
+          client->_httpRequestData.postParamsDataPointer = (char *)client->_data + 1;//We save the starting position of the string to parse and we ignore the \n
+      }
+      
+      char *key = strchr(client->_httpRequestData.postParamsDataPointer, '=');
+      char *value = strchr(client->_httpRequestData.postParamsDataPointer, '&');
+
+      if(key == NULL && value == NULL) //Nothing to parse or done
+      {
+        return false;
+      }
+      else if(key != NULL && value == NULL) //Only one key is present
+      {
+        *key = '\0';
+        client->_httpRequestData.postParams.add(client->_httpRequestData.postParamsDataPointer, new DictionaryHelper::StringEntity(key+1));
+        return false;
+      }
+      else if(key != NULL && value != NULL)
+      {
+        *key = '\0';
+        *value = '\0';
+        client->_httpRequestData.postParams.add(client->_httpRequestData.postParamsDataPointer, new DictionaryHelper::StringEntity(key+1));
+        memmove(client->_httpRequestData.postParamsDataPointer, value +1, strlen(value+1) + 1);
+      }
+      else if(key == NULL && value != NULL)//Should never happen
+        return false;
+        
+      return true;
     }
 
     void sendDataToClient(T *client)
@@ -387,7 +524,7 @@ class WEBServer : public TCPServer<T>
               return false;
             }
 
-            if(client->_fileSentBytes == 0)
+            if(client->_fileSentBytes == 0 /*&& client->_range == 0*/)
             {
               char *fileName = (char *) malloc(sizeof(char) * strlen(pageToSend.name()) + 1); 
               
@@ -411,6 +548,11 @@ class WEBServer : public TCPServer<T>
               client->_client.print(header);
               free(header);header = NULL;
             }
+            /*else if(client->_fileSentBytes == 0 && (!client->_range == 0))
+            {
+              client->_fileSentBytes = client->_range-500;
+              Serial.println("RANGE SET");
+            }*/
             else
             {
               pageToSend.seek(client->_fileSentBytes);
@@ -438,6 +580,7 @@ class WEBServer : public TCPServer<T>
             break;
           default: //If not supported
             sendInfoResponse(HTTP_CODE::_500, client, "The method used is not allowed");
+            return false;
             break;
         }
       }else
@@ -448,8 +591,10 @@ class WEBServer : public TCPServer<T>
       
       return true;
     }
+
+    /*Static helper methods*/
     
-    void sendInfoResponse(HTTP_CODE http_code, T *client, const char *message)
+    static void sendInfoResponse(HTTP_CODE http_code, T *client, const char *message)
     {
       uint16_t code(0); 
       char codeLiteral[100];
@@ -457,39 +602,32 @@ class WEBServer : public TCPServer<T>
       {
         case _400:
           code = 400;
-          strcpy_P(codeLiteral,(PGM_P)F("Bad Request"));
+          strcpy_P(codeLiteral,PSTR("Bad Request"));
           break;
         case _404:
           code = 404;
-          strcpy_P(codeLiteral,(PGM_P)F("Not Found"));
+          strcpy_P(codeLiteral,PSTR("Not Found"));
           break;
         case _403:
           code = 403;
-          strcpy_P(codeLiteral,(PGM_P)F("Forbidden"));
+          strcpy_P(codeLiteral,PSTR("Forbidden"));
           break;
         case _405:
           code = 405;
-          strcpy_P(codeLiteral,(PGM_P)F("Method Not Allowed"));
+          strcpy_P(codeLiteral,PSTR("Method Not Allowed"));
           break;
         case _500:
           code = 500;
-          strcpy_P(codeLiteral,(PGM_P)F("Internal Server Error"));
+          strcpy_P(codeLiteral,PSTR("Internal Server Error"));
           break;
         default:
           code = 000;
-          strcpy_P(codeLiteral,(PGM_P)F("Error Not Defined"));
+          strcpy_P(codeLiteral,PSTR("Error Not Defined"));
           break;
       }
-
-      client->_client.print(F("HTTP/1.1 "));client->_client.print(code);client->_client.print(F(" "));client->_client.print(codeLiteral);client->_client.print(F("\r\nContent-Type: text/html\r\nContent-Length: "));
-      client->_client.print(strlen(message) + 59);
-      client->_client.print(F("\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\n<h1>Error "));client->_client.print(code);client->_client.print(F("</h1><p>"));
-      client->_client.print(message);
-      client->_client.print(F("</p>\r\n</html>"));
+      client->_client.printf_P(PSTR("HTTP/1.1 %d %s\r\nContent-Type: text/html\r\nContent-Length: %d\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\n<h1>Error %d</h1><p>%s</p>\r\n</html>"), code, codeLiteral, strlen(message) + 56 + (code != 0 ? 3:1), code , message);
     }
     
-    /*Static helper methods*/
-    
 		static HttpRequestMethod getHttpVerbEnumValue(const char *parseBuffer)
     {
       if(parseBuffer == NULL)return HttpRequestMethod::UNDEFINED;
@@ -523,43 +661,48 @@ class WEBServer : public TCPServer<T>
       else return UNKNOWN_MIME;
     }
     
-    char *getHTTPHeader(HttpMIMEType httpMIMEType, unsigned long size)
+    static char *getHTTPHeader(HttpMIMEType httpMIMEType, size_t size)
     {
-      char *header = (char *) malloc(sizeof(char) + strlen("HTTP/1.1 200 OK\r\nContent-Type: \r\nContent-Length: \r\n\r\n") + 74/*Longest MIME-TYPE*/ + 10 /*Max unsigned long footprint*/ + 1);
+      char *header = (char *) malloc(sizeof(char) /*strlen("HTTP/1.1 200 OK\r\nContent-Type: \r\nContent-Length: \r\nCache-Control: max-age=31536000\r\n\r\n")*/* (86 + 74/*Longest MIME-TYPE*/ + 10 /*Max unsigned long footprint*/ + 1));
     
       switch(httpMIMEType)
       {
         case TEXT_HTML:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","text/html",size);
+          injectHeaderLayout(header,"text/html", size);
           break;
         case TEXT_CSS:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","text/css",size);
+          injectHeaderLayout(header,"text/css", size);
           break;
         case TEXT_JAVASCRIPT:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","text/javascript",size);
+          injectHeaderLayout(header,"text/javascript", size);
           break;
         case IMAGE_PNG:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","image/png",size);
+          injectHeaderLayout(header,"image/png", size);
           break;
         case IMAGE_JPEG:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","image/jpeg",size);
+          injectHeaderLayout(header,"image/jpeg", size);
           break;
         case TEXT_PLAIN:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","text/plain",size);
+          injectHeaderLayout(header,"text/plain", size);
           break;
         case AUDIO_MPEG:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","audio/mpeg",size);
+          injectHeaderLayout(header,"audio/mpeg", size);
           break;
         case APPLICATION_OCTET_STREAM:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","application/octet-stream",size);
+          injectHeaderLayout(header,"application/octet-stream", size);
           break;
         default:
-          sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\n\r\n","application/octet-stream",size);
+          injectHeaderLayout(header,"application/octet-stream", size);
           break;
       }
     
       return header;
     }
+
+    static void injectHeaderLayout(char *header, const char *contentType, size_t size)
+    {
+      sprintf(header,"HTTP/1.1 200 OK\r\nContent-Type: %s\r\nContent-Length: %lu\r\nCache-Control: max-age=31536000\r\n\r\n",contentType,size);
+    }
     
     static char *getFileExtension(char *name)
     {