/*
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WebServer.h - Dead simple web-server.
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Supports only one simultaneous client, knows how to handle GET and POST.
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Modified 8 May 2015 by Hristo Gochkov (proper post and file upload handling)
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*/
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#ifndef WEBSERVER_H
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#define WEBSERVER_H
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#include <functional>
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#include <memory>
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#include <WiFi.h>
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#include "HTTP_Method.h"
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enum HTTPUploadStatus { UPLOAD_FILE_START, UPLOAD_FILE_WRITE, UPLOAD_FILE_END,
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UPLOAD_FILE_ABORTED };
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enum HTTPClientStatus { HC_NONE, HC_WAIT_READ, HC_WAIT_CLOSE };
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enum HTTPAuthMethod { BASIC_AUTH, DIGEST_AUTH };
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#define HTTP_DOWNLOAD_UNIT_SIZE 1436
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#ifndef HTTP_UPLOAD_BUFLEN
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#define HTTP_UPLOAD_BUFLEN 1436
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#endif
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#define HTTP_MAX_DATA_WAIT 5000 //ms to wait for the client to send the request
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#define HTTP_MAX_POST_WAIT 5000 //ms to wait for POST data to arrive
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#define HTTP_MAX_SEND_WAIT 5000 //ms to wait for data chunk to be ACKed
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#define HTTP_MAX_CLOSE_WAIT 2000 //ms to wait for the client to close the connection
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#define CONTENT_LENGTH_UNKNOWN ((size_t) -1)
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#define CONTENT_LENGTH_NOT_SET ((size_t) -2)
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class WebServer;
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typedef struct {
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HTTPUploadStatus status;
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String filename;
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String name;
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String type;
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size_t totalSize; // file size
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size_t currentSize; // size of data currently in buf
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uint8_t buf[HTTP_UPLOAD_BUFLEN];
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} HTTPUpload;
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#include "detail/RequestHandler.h"
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namespace fs {
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class FS;
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}
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class WebServer
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{
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public:
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WebServer(IPAddress addr, int port = 80);
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WebServer(int port = 80);
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virtual ~WebServer();
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virtual void begin();
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virtual void begin(uint16_t port);
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virtual void handleClient();
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virtual void close();
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void stop();
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bool authenticate(const char * username, const char * password);
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void requestAuthentication(HTTPAuthMethod mode = BASIC_AUTH, const char* realm = NULL, const String& authFailMsg = String("") );
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typedef std::function<void(void)> THandlerFunction;
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void on(const String &uri, THandlerFunction handler);
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void on(const String &uri, HTTPMethod method, THandlerFunction fn);
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void on(const String &uri, HTTPMethod method, THandlerFunction fn, THandlerFunction ufn);
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void addHandler(RequestHandler* handler);
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void serveStatic(const char* uri, fs::FS& fs, const char* path, const char* cache_header = NULL );
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void onNotFound(THandlerFunction fn); //called when handler is not assigned
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void onFileUpload(THandlerFunction fn); //handle file uploads
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String uri() { return _currentUri; }
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HTTPMethod method() { return _currentMethod; }
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virtual WiFiClient client() { return _currentClient; }
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HTTPUpload& upload() { return *_currentUpload; }
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String pathArg(unsigned int i); // get request path argument by number
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String arg(String name); // get request argument value by name
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String arg(int i); // get request argument value by number
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String argName(int i); // get request argument name by number
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int args(); // get arguments count
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bool hasArg(String name); // check if argument exists
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void collectHeaders(const char* headerKeys[], const size_t headerKeysCount); // set the request headers to collect
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String header(String name); // get request header value by name
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String header(int i); // get request header value by number
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String headerName(int i); // get request header name by number
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int headers(); // get header count
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bool hasHeader(String name); // check if header exists
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String hostHeader(); // get request host header if available or empty String if not
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// send response to the client
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// code - HTTP response code, can be 200 or 404
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// content_type - HTTP content type, like "text/plain" or "image/png"
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// content - actual content body
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void send(int code, const char* content_type = NULL, const String& content = String(""));
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void send(int code, char* content_type, const String& content);
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void send(int code, const String& content_type, const String& content);
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void send_P(int code, PGM_P content_type, PGM_P content);
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void send_P(int code, PGM_P content_type, PGM_P content, size_t contentLength);
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void enableCORS(boolean value = true);
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void enableCrossOrigin(boolean value = true);
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void setContentLength(const size_t contentLength);
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void sendHeader(const String& name, const String& value, bool first = false);
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void sendContent(const String& content);
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void sendContent_P(PGM_P content);
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void sendContent_P(PGM_P content, size_t size);
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static String urlDecode(const String& text);
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template<typename T>
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size_t streamFile(T &file, const String& contentType) {
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_streamFileCore(file.size(), file.name(), contentType);
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return _currentClient.write(file);
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}
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protected:
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virtual size_t _currentClientWrite(const char* b, size_t l) { return _currentClient.write( b, l ); }
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virtual size_t _currentClientWrite_P(PGM_P b, size_t l) { return _currentClient.write_P( b, l ); }
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void _addRequestHandler(RequestHandler* handler);
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void _handleRequest();
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void _finalizeResponse();
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bool _parseRequest(WiFiClient& client);
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void _parseArguments(String data);
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static String _responseCodeToString(int code);
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bool _parseForm(WiFiClient& client, String boundary, uint32_t len);
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bool _parseFormUploadAborted();
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void _uploadWriteByte(uint8_t b);
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int _uploadReadByte(WiFiClient& client);
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void _prepareHeader(String& response, int code, const char* content_type, size_t contentLength);
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bool _collectHeader(const char* headerName, const char* headerValue);
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void _streamFileCore(const size_t fileSize, const String & fileName, const String & contentType);
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String _getRandomHexString();
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// for extracting Auth parameters
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String _extractParam(String& authReq,const String& param,const char delimit = '"');
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struct RequestArgument {
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String key;
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String value;
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};
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boolean _corsEnabled;
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WiFiServer _server;
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WiFiClient _currentClient;
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HTTPMethod _currentMethod;
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String _currentUri;
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uint8_t _currentVersion;
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HTTPClientStatus _currentStatus;
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unsigned long _statusChange;
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RequestHandler* _currentHandler;
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RequestHandler* _firstHandler;
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RequestHandler* _lastHandler;
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THandlerFunction _notFoundHandler;
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THandlerFunction _fileUploadHandler;
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int _currentArgCount;
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RequestArgument* _currentArgs;
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int _postArgsLen;
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RequestArgument* _postArgs;
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std::unique_ptr<HTTPUpload> _currentUpload;
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int _headerKeysCount;
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RequestArgument* _currentHeaders;
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size_t _contentLength;
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String _responseHeaders;
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String _hostHeader;
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bool _chunked;
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String _snonce; // Store noance and opaque for future comparison
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String _sopaque;
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String _srealm; // Store the Auth realm between Calls
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};
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#endif //ESP8266WEBSERVER_H
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