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Khoi Hoang
2021-11-23 02:08:42 -05:00
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esp32s2_WebServer_Patch/WebServer.h
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/*
WebServer.h - Dead simple web-server.
Supports only one simultaneous client, knows how to handle GET and POST.
Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Modified 8 May 2015 by Hristo Gochkov (proper post and file upload handling)
*/
#ifndef WEBSERVER_H
#define WEBSERVER_H
#include <functional>
#include <memory>
#include <WiFi.h>
#include "HTTP_Method.h"
#include "Uri.h"
enum HTTPUploadStatus { UPLOAD_FILE_START, UPLOAD_FILE_WRITE, UPLOAD_FILE_END,
UPLOAD_FILE_ABORTED };
enum HTTPClientStatus { HC_NONE, HC_WAIT_READ, HC_WAIT_CLOSE };
enum HTTPAuthMethod { BASIC_AUTH, DIGEST_AUTH };
#define HTTP_DOWNLOAD_UNIT_SIZE 1436
#ifndef HTTP_UPLOAD_BUFLEN
#define HTTP_UPLOAD_BUFLEN 1436
#endif
#define HTTP_MAX_DATA_WAIT 5000 //ms to wait for the client to send the request
#define HTTP_MAX_POST_WAIT 5000 //ms to wait for POST data to arrive
#define HTTP_MAX_SEND_WAIT 5000 //ms to wait for data chunk to be ACKed
#define HTTP_MAX_CLOSE_WAIT 2000 //ms to wait for the client to close the connection
#define CONTENT_LENGTH_UNKNOWN ((size_t) -1)
#define CONTENT_LENGTH_NOT_SET ((size_t) -2)
class WebServer;
typedef struct {
HTTPUploadStatus status;
String filename;
String name;
String type;
size_t totalSize; // file size
size_t currentSize; // size of data currently in buf
uint8_t buf[HTTP_UPLOAD_BUFLEN];
} HTTPUpload;
#include "detail/RequestHandler.h"
namespace fs {
class FS;
}
class WebServer
{
public:
WebServer(IPAddress addr, int port = 80);
WebServer(int port = 80);
virtual ~WebServer();
virtual void begin();
virtual void begin(uint16_t port);
virtual void handleClient();
virtual void close();
void stop();
bool authenticate(const char * username, const char * password);
void requestAuthentication(HTTPAuthMethod mode = BASIC_AUTH, const char* realm = NULL, const String& authFailMsg = String("") );
typedef std::function<void(void)> THandlerFunction;
void on(const Uri &uri, THandlerFunction handler);
void on(const Uri &uri, HTTPMethod method, THandlerFunction fn);
void on(const Uri &uri, HTTPMethod method, THandlerFunction fn, THandlerFunction ufn);
void addHandler(RequestHandler* handler);
void serveStatic(const char* uri, fs::FS& fs, const char* path, const char* cache_header = NULL );
void onNotFound(THandlerFunction fn); //called when handler is not assigned
void onFileUpload(THandlerFunction fn); //handle file uploads
String uri() { return _currentUri; }
HTTPMethod method() { return _currentMethod; }
virtual WiFiClient client() { return _currentClient; }
HTTPUpload& upload() { return *_currentUpload; }
String pathArg(unsigned int i); // get request path argument by number
String arg(String name); // get request argument value by name
String arg(int i); // get request argument value by number
String argName(int i); // get request argument name by number
int args(); // get arguments count
bool hasArg(String name); // check if argument exists
void collectHeaders(const char* headerKeys[], const size_t headerKeysCount); // set the request headers to collect
String header(String name); // get request header value by name
String header(int i); // get request header value by number
String headerName(int i); // get request header name by number
int headers(); // get header count
bool hasHeader(String name); // check if header exists
String hostHeader(); // get request host header if available or empty String if not
// send response to the client
// code - HTTP response code, can be 200 or 404
// content_type - HTTP content type, like "text/plain" or "image/png"
// content - actual content body
void send(int code, const char* content_type = NULL, const String& content = String(""));
void send(int code, char* content_type, const String& content);
void send(int code, const String& content_type, const String& content);
void send_P(int code, PGM_P content_type, PGM_P content);
void send_P(int code, PGM_P content_type, PGM_P content, size_t contentLength);
void enableDelay(boolean value);
void enableCORS(boolean value = true);
void enableCrossOrigin(boolean value = true);
void setContentLength(const size_t contentLength);
void sendHeader(const String& name, const String& value, bool first = false);
void sendContent(const String& content);
void sendContent(const char* content, size_t contentLength);
void sendContent_P(PGM_P content);
void sendContent_P(PGM_P content, size_t size);
static String urlDecode(const String& text);
template<typename T>
size_t streamFile(T &file, const String& contentType) {
_streamFileCore(file.size(), file.name(), contentType);
return _currentClient.write(file);
}
protected:
virtual size_t _currentClientWrite(const char* b, size_t l) { return _currentClient.write( b, l ); }
virtual size_t _currentClientWrite_P(PGM_P b, size_t l) { return _currentClient.write_P( b, l ); }
void _addRequestHandler(RequestHandler* handler);
void _handleRequest();
void _finalizeResponse();
bool _parseRequest(WiFiClient& client);
void _parseArguments(String data);
static String _responseCodeToString(int code);
bool _parseForm(WiFiClient& client, String boundary, uint32_t len);
bool _parseFormUploadAborted();
void _uploadWriteByte(uint8_t b);
int _uploadReadByte(WiFiClient& client);
void _prepareHeader(String& response, int code, const char* content_type, size_t contentLength);
bool _collectHeader(const char* headerName, const char* headerValue);
void _streamFileCore(const size_t fileSize, const String & fileName, const String & contentType);
String _getRandomHexString();
// for extracting Auth parameters
String _extractParam(String& authReq,const String& param,const char delimit = '"');
struct RequestArgument {
String key;
String value;
};
boolean _corsEnabled;
WiFiServer _server;
WiFiClient _currentClient;
HTTPMethod _currentMethod;
String _currentUri;
uint8_t _currentVersion;
HTTPClientStatus _currentStatus;
unsigned long _statusChange;
bool _nullDelay;
RequestHandler* _currentHandler;
RequestHandler* _firstHandler;
RequestHandler* _lastHandler;
THandlerFunction _notFoundHandler;
THandlerFunction _fileUploadHandler;
int _currentArgCount;
RequestArgument* _currentArgs;
int _postArgsLen;
RequestArgument* _postArgs;
std::unique_ptr<HTTPUpload> _currentUpload;
int _headerKeysCount;
RequestArgument* _currentHeaders;
size_t _contentLength;
String _responseHeaders;
String _hostHeader;
bool _chunked;
String _snonce; // Store noance and opaque for future comparison
String _sopaque;
String _srealm; // Store the Auth realm between Calls
};
#endif //ESP8266WEBSERVER_H