601 lines
22 KiB
C++
601 lines
22 KiB
C++
#ifndef WEBSERVER_H
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#define WEBSERVER_H
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#include "TCPServer.h"
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#include "Dictionary.h"
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#include "SDCardManager.h"
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//#define DEBUG_WEBS
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template <typename T>
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class WEBServer : public TCPServer<T>
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{
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public:
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enum HttpRequestMethod {UNDEFINED, GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE, PATCH};
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enum HttpVersion {UNKNOWN, HTTP_0_9, HTTP_1_1, HTTP_1_0, HTTP_2_0};
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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};
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enum HttpParserStatus {HTTP_VERB, HTTP_RESSOURCE, HTTP_VERSION, HTTP_PARAMS, POST_DATA};
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enum WEBClientState {ACCEPTED, QUERY_PARSED, RESPONSE_SENT, DONE};
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enum HTTP_CODE {_100, _101, _200, _400, _401, _403, _404, _405, _500, _501};
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struct HttpRequestData
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{
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HttpRequestMethod HRM;
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HttpVersion HV;
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HttpMIMEType HMT;
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Dictionary<DictionaryHelper::StringEntity> getParams;
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char *getParamsDataPointer; //Used in the getParams algorithm
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Dictionary<DictionaryHelper::StringEntity> postParams;
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char *postParamsDataPointer; //Used in the postParams algorithm
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char *httpResource;
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uint16_t maxResourceBuffer;
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char *httpBody;
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uint16_t maxBodyBuffer;
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};
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WEBServer(unsigned int port = 80, SDCardManager *sdCardManager = NULL, uint8_t maxClient = MAX_CLIENT, uint16_t clientDataBufferSize = 255) : TCPServer<T>(port, maxClient, clientDataBufferSize), _sdCardManager(sdCardManager) {}
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boolean addApiRoutine(const char *uri, boolean (*apiRoutine)(HttpRequestData&, WiFiClient*, void*), void *pData, HttpRequestMethod HRM = UNDEFINED)
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{
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return _apiDictionary.add(uri, new ApiRoutine({apiRoutine, pData, HRM}));
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}
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void clearApiRoutine() { _apiDictionary.clear(); };
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boolean removeApiRoutine(const char* uri)
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{
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return _apiDictionary.remove(uri);
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}
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protected:
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private:
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virtual T* createNewClient(WiFiClient wc)
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{
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return new T(wc, TCPServer<T>::freeClientId(), TCPServer<T>::_clientDataBufferSize);
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}
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virtual void greetClient(T *client)
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{
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}
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virtual void processClientData(T *client)
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{
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if(client->_dataSize > 0)
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{
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switch(client->_WEBClientState)
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{
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case ACCEPTED:
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#ifdef DEBUG_WEBS
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Serial.println("WEBServer : ACCEPTED");
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#endif
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queryParser(client);
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break;
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case QUERY_PARSED:
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#ifdef DEBUG_WEBS
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Serial.println("WEBServer : QUERY_PARSED");
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#endif
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sendDataToClient(client);
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break;
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case RESPONSE_SENT:
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#ifdef DEBUG_WEBS
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Serial.println("WEBServer : RESPONSE_SENT");
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#endif
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client->_WEBClientState = WEBClientState::DONE;
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break;
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case DONE:
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#ifdef DEBUG_WEBS
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Serial.println("WEBServer : DONE");
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#endif
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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}
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}
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void queryParser(T *client)
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{
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switch(client->_httpParserState)
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{
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case HttpParserStatus::HTTP_VERB:
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{
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#ifdef DEBUG_WEBS
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Serial.println((char *)client->_data);
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#endif
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char *pVerb = strstr((char *)client->_data, " ");
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if(pVerb != NULL)
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{
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*pVerb = '\0';
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client->_httpRequestData.HRM = getHttpVerbEnumValue((char *)client->_data);
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client->freeDataBuffer((pVerb - (char *)client->_data) +1);
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if(client->_httpRequestData.HRM == HttpRequestMethod::UNDEFINED) //Error 400
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{
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sendInfoResponse(HTTP_CODE::_400, client, "The server could not understand the request due to invalid syntax");
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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#ifdef DEBUG_WEBS
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Serial.print("Verb : ");Serial.println(client->_httpRequestData.HRM);
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Serial.println((char *)client->_data);
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#endif
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client->_httpParserState = HttpParserStatus::HTTP_RESSOURCE;
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}
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else
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{
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sendInfoResponse(HTTP_CODE::_400, client, "The server could not understand the request due to invalid syntax");
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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}
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break;
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case HttpParserStatus::HTTP_RESSOURCE:
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{
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char *pRsrc = strstr((char *)client->_data, " ");
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if(pRsrc != NULL)
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{
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*pRsrc = '\0';
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uint16_t safeLength = pRsrc - (char *)client->_data <= client->_httpRequestData.maxResourceBuffer ? pRsrc - (char *)client->_data : client->_httpRequestData.maxResourceBuffer;
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#ifdef DEBUG_WEBS
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Serial.print("Resrc length : ");Serial.println(safeLength);
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#endif
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client->_httpRequestData.httpResource = (char *) malloc(sizeof(char) * (safeLength+1) ); //for \0
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if(client->_httpRequestData.httpResource != NULL)
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{
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strncpy(client->_httpRequestData.httpResource, (char *)client->_data, safeLength);
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client->_httpRequestData.httpResource[safeLength] = '\0';
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}
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else //Error 500
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Failed to allocate memory for resources");
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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client->freeDataBuffer(safeLength + 1);
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#ifdef DEBUG_WEBS
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Serial.print("Resrc : ");Serial.println(client->_httpRequestData.httpResource);
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Serial.println((char *)client->_data);
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#endif
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}
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else //Resource is probably too long, so we truncate it
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{
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client->_httpRequestData.httpResource = (char *) malloc(sizeof(char) * (client->_httpRequestData.maxResourceBuffer+1) ); //for \0
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if(client->_httpRequestData.httpResource != NULL)
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{
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strncpy(client->_httpRequestData.httpResource, (char *)client->_data, client->_httpRequestData.maxResourceBuffer);
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client->_httpRequestData.httpResource[client->_httpRequestData.maxResourceBuffer] = '\0';
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}
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else //Error 500
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Failed to allocate memory for resources");
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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client->freeDataBuffer(client->_httpRequestData.maxResourceBuffer + 1);
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}
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client->_httpParserState = HttpParserStatus::HTTP_PARAMS;
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}
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break;
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case HttpParserStatus::HTTP_VERSION:
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{
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char *pEndline = strstr((char *)client->_data, "\r\n");
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char *pVers = strstr((char *)client->_data, "HTTP/");
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if(pEndline != NULL && pVers!= NULL)
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{
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*pEndline = '\0';
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client->_httpRequestData.HV = getHttpVersionEnumValue(pVers+5);
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#ifdef DEBUG_WEBS
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Serial.print("Vers : ");Serial.println(pVers+5);
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Serial.print("Vers : ");Serial.println(client->_httpRequestData.HV);
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#endif
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client->freeDataBuffer((pEndline - (char *)client->_data)+2);
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#ifdef DEBUG_WEBS
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Serial.println((char *)client->_data);
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#endif
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client->_httpParserState = HttpParserStatus::POST_DATA;
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}
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}
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break;
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case HttpParserStatus::HTTP_PARAMS: //index.htm?var1=1&var2=2...
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if(!httpParamParser(client))
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{
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#ifdef DEBUG_WEBS
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Serial.print("Resrc : ");Serial.println(client->_httpRequestData.httpResource);
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Serial.println("Get params :");
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for(int i = 0; i < client->_httpRequestData.getParams.count(); i++)
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{
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Serial.print(client->_httpRequestData.getParams.getParameter(i));Serial.print(" : ");Serial.println(client->_httpRequestData.getParams.getAt(i)->getString());
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}
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#endif
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client->_httpParserState = HttpParserStatus::HTTP_VERSION;
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}
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break;
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case HttpParserStatus::POST_DATA:
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client->_WEBClientState = WEBClientState::QUERY_PARSED;
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break;
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default :
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sendInfoResponse(HTTP_CODE::_500, client, "WEB server error");
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client->_clientState = TCPClient::ClientState::DISCARDED;
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break;
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}
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}
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boolean httpParamParser(T *client)
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{
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char *pGetParam = strchr((char *)client->_httpRequestData.httpResource, '?');
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if(pGetParam != NULL) //There are some params to be parsed
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{
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if(client->_httpRequestData.getParamsDataPointer == NULL)
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{
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client->_httpRequestData.getParamsDataPointer = pGetParam +1;//We save the starting position of the string to parse
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}
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char *key = strchr(client->_httpRequestData.getParamsDataPointer, '=');
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char *value = strchr(client->_httpRequestData.getParamsDataPointer, '&');
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if(key == NULL && value == NULL) //Only the key is present
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{
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client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(NULL));
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*pGetParam = '\0';
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return false;
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}
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else if(key != NULL && value != NULL)
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{
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if(key < value)*key = '\0';
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*value = '\0';
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client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(key > value ? NULL : key + 1));
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strcpy(client->_httpRequestData.getParamsDataPointer,value+1);
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#ifdef DEBUG_WEBS
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Serial.print("Params pointer : ");Serial.println(client->_httpRequestData.getParamsDataPointer);
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#endif
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}
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else if(key != NULL && value == NULL) //Only one key/value pair present
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{
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*key = '\0';
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client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(key+1));
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*pGetParam = '\0';
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return false;
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}
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else if(key == NULL && value != NULL)
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{
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*value = '\0';
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client->_httpRequestData.getParams.add(client->_httpRequestData.getParamsDataPointer, new DictionaryHelper::StringEntity(NULL));
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strcpy(client->_httpRequestData.getParamsDataPointer,value+1);
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}
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}
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else //nothing to parse or done
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{
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return false;
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}
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}
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void sendDataToClient(T *client)
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{
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if(!sendPageToClientFromApiDictio(client)) //Then we check if it is not a file that is requested
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{
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if(!sendPageToClientFromSdCard(client)) //If this function returns false, we close the connection with the client. An error occured (An error message has already been sent) or the whole file has been sent.
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{
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client->_WEBClientState = WEBClientState::RESPONSE_SENT;
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}
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}
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else //If we found the api endpoint, we can close the connection with the client after the data has been sent.
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client->_WEBClientState = WEBClientState::RESPONSE_SENT;
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}
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boolean sendPageToClientFromApiDictio(T *client)
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{
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if(_apiDictionary.count() == 0 || client->_httpRequestData.httpResource == NULL)
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return false;
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ApiRoutine *ref = _apiDictionary(client->_httpRequestData.httpResource);
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if(ref == NULL)
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return false;
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if(ref->HRM == UNDEFINED)
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{
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return (*(ref->apiRoutine))(client->_httpRequestData, &(client->_client), ref->pData);
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}else if(ref->HRM == client->_httpRequestData.HRM)
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{
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return (*(ref->apiRoutine))(client->_httpRequestData, &(client->_client), ref->pData);
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}
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else
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return false;
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}
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boolean sendPageToClientFromSdCard(T *client)
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{
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if(_sdCardManager != NULL)
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{
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File pageToSend;
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char *filePath(NULL), *header(NULL), sendBuffer[2048];
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int readBytes(0);
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//We check what kind of http verb it is
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switch(client->_httpRequestData.HRM)
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{
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case GET:
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filePath = getFilePathByHttpResource(client->_httpRequestData.httpResource);
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if(filePath == NULL)
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Failed to allocate memory for the filePath");
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return false;
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}
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#ifdef DEBUG_WEBS
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Serial.print("FILE PATH : ");
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Serial.println(filePath);
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#endif
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pageToSend = _sdCardManager->open(filePath);
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free(filePath);filePath = NULL;
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//If we couldn't open the file
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if(!pageToSend)
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{
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char *response(NULL);
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response = (char *) malloc(sizeof(char) * (strlen_P((PGM_P)F("Resource : not found on this server")) + strlen(client->_httpRequestData.httpResource) + 1));
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if(response == NULL)
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Failed to allocate memory for the response");
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return false;
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}
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sprintf(response, "Resource : %s not found on this server", client->_httpRequestData.httpResource);
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sendInfoResponse(HTTP_CODE::_404, client, response);
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free(response);response = NULL;
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return false;
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}
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#ifdef DEBUG_WEBS
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Serial.print("FILE SIZE : ");
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Serial.println(pageToSend.size());
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Serial.print("FILE NAME : ");
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Serial.println(pageToSend.name());
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Serial.print("FILE EXTENSION : ");
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Serial.println(getFileExtension(pageToSend.name()));
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#endif
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if(pageToSend.isDirectory()) //To DO : List the files present in the directory
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{
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pageToSend.close();
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sendInfoResponse(HTTP_CODE::_403, client, "The file you want to access is a folder");
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return false;
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}
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if(client->_fileSentBytes == 0)
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{
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header = getHTTPHeader(getMIMETypeByExtension(getFileExtension(pageToSend.name())), pageToSend.size());
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if(header == NULL)
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Failed to allocate memory for the header");
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pageToSend.close();
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return false;
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}
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client->_client.print(header);
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free(header);header = NULL;
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}
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else
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{
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pageToSend.seek(client->_fileSentBytes);
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}
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if(pageToSend.available())
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{
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readBytes = pageToSend.read(sendBuffer,2048);
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client->_client.write(sendBuffer, readBytes);
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client->_fileSentBytes += readBytes; //We save the number of bytes sent so that we can reopen the file to this position later on.
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}
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else
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{
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pageToSend.close();
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return false;
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}
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pageToSend.close();
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break;
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default: //If not supported
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sendInfoResponse(HTTP_CODE::_500, client, "The method used is not allowed");
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break;
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}
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}else
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{
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sendInfoResponse(HTTP_CODE::_500, client, "Unable to access the SDCard");
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return false;
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}
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return true;
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}
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void sendInfoResponse(HTTP_CODE http_code, T *client, const char *message)
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{
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uint16_t code(0);
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char codeLiteral[100];
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switch(http_code)
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{
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case _400:
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code = 400;
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strcpy_P(codeLiteral,(PGM_P)F("Bad Request"));
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break;
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case _404:
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code = 404;
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strcpy_P(codeLiteral,(PGM_P)F("Not Found"));
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break;
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case _403:
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code = 403;
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strcpy_P(codeLiteral,(PGM_P)F("Forbidden"));
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break;
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case _405:
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code = 405;
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strcpy_P(codeLiteral,(PGM_P)F("Method Not Allowed"));
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break;
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case _500:
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code = 500;
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strcpy_P(codeLiteral,(PGM_P)F("Internal Server Error"));
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break;
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default:
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code = 000;
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strcpy_P(codeLiteral,(PGM_P)F("Error Not Defined"));
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break;
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}
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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: "));
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client->_client.print(strlen(message) + 59);
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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>"));
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client->_client.print(message);
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client->_client.print(F("</p>\r\n</html>"));
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}
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/*Static helper methods*/
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static HttpRequestMethod getHttpVerbEnumValue(const char *parseBuffer)
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{
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if(parseBuffer == NULL)return HttpRequestMethod::UNDEFINED;
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//UNDEFINED, GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE, PATCH
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if(strcmp(parseBuffer,"GET") == 0){return HttpRequestMethod::GET;}
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else if(strcmp(parseBuffer,"POST") == 0){return HttpRequestMethod::POST;}
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else if(strcmp(parseBuffer,"HEAD") == 0){return HttpRequestMethod::HEAD;}
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else if(strcmp(parseBuffer,"PUT") == 0){return HttpRequestMethod::PUT;}
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else if(strcmp(parseBuffer,"DELETE") == 0){return HttpRequestMethod::DELETE;}
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else if(strcmp(parseBuffer,"CONNECT") == 0){return HttpRequestMethod::CONNECT;}
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else if(strcmp(parseBuffer,"TRACE") == 0){return HttpRequestMethod::TRACE;}
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else if(strcmp(parseBuffer,"PATCH") == 0){return HttpRequestMethod::PATCH;}
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else if(strcmp(parseBuffer,"OPTIONS") == 0){return HttpRequestMethod::OPTIONS;}
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else
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return HttpRequestMethod::UNDEFINED;
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}
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static HttpMIMEType getMIMETypeByExtension(const char *extension)
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{
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if(extension == NULL)return UNKNOWN_MIME;
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//TEXT_PLAIN, TEXT_CSS, TEXT_HTML, TEXT_JAVASCRIPT
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if(strcmp(extension,"web") == 0) return TEXT_HTML;
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else if(strcmp(extension,"htm") == 0) return TEXT_HTML;
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|
else if(strcmp(extension,"css") == 0) return TEXT_CSS;
|
|
else if(strcmp(extension,"js") == 0) return TEXT_JAVASCRIPT;
|
|
else if(strcmp(extension,"png") == 0) return IMAGE_PNG;
|
|
else if(strcmp(extension,"jpg") == 0) return IMAGE_JPEG;
|
|
else if(strcmp(extension, "mp3") == 0) return AUDIO_MPEG;
|
|
else return UNKNOWN_MIME;
|
|
}
|
|
|
|
char *getHTTPHeader(HttpMIMEType httpMIMEType, unsigned long 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);
|
|
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
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);
|
|
break;
|
|
}
|
|
|
|
return header;
|
|
}
|
|
|
|
static char *getFileExtension(char *name)
|
|
{
|
|
if(name == NULL)return NULL;
|
|
|
|
char *p(strchr(name, '.'));
|
|
|
|
return p != NULL ? p+1 : NULL;
|
|
}
|
|
|
|
static char *getFilePathByHttpResource(char *res)
|
|
{
|
|
uint16_t buffSize = strlen(WWW_DIR) + (strcmp(res, "/") == 0 ? 10:strlen(res)) + 1;//10 for /index.htm +1 for \0
|
|
char *filePath = (char*) malloc( sizeof(char) * buffSize);
|
|
|
|
if(filePath == NULL)
|
|
return NULL;
|
|
|
|
strcpy(filePath, WWW_DIR);
|
|
strcat(filePath, strcmp(res, "/") == 0 ? "/index.htm":res);
|
|
|
|
#ifdef DEBUG_FILEPATH
|
|
Serial.println(res);
|
|
Serial.print("Reserved space : ");Serial.println(buffSize);
|
|
Serial.print("Actual size : ");Serial.println(strlen(filePath));
|
|
Serial.println(filePath);
|
|
#endif
|
|
|
|
return filePath;
|
|
}
|
|
|
|
static HttpVersion getHttpVersionEnumValue(const char *parseBuffer)
|
|
{
|
|
//HTTP_0_9, HTTP_1_1, HTTP_1_0, HTTP_2_0
|
|
if(strcmp(parseBuffer,"1.1") == 0){return HttpVersion::HTTP_1_1;}
|
|
else if(strcmp(parseBuffer,"2.0") == 0){return HttpVersion::HTTP_2_0;}
|
|
else if(strcmp(parseBuffer,"1.0") == 0){return HttpVersion::HTTP_1_0;}
|
|
else if(strcmp(parseBuffer,"0.9") == 0){return HttpVersion::HTTP_0_9;}
|
|
else
|
|
return HttpVersion::UNKNOWN;
|
|
}
|
|
|
|
struct ApiRoutine
|
|
{
|
|
boolean (*apiRoutine)(HttpRequestData&, WiFiClient*, void*);
|
|
void *pData;
|
|
HttpRequestMethod HRM;
|
|
};
|
|
|
|
Dictionary<ApiRoutine> _apiDictionary;
|
|
SDCardManager *_sdCardManager;
|
|
};
|
|
|
|
#endif //WEBSERVER_H
|