f57c36782f
The web server currently lacks the ability to send a buffer. Only strings are supported. This PR adds an overload to sendContent.
704 lines
20 KiB
C++
704 lines
20 KiB
C++
/*
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WebServer.cpp - 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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#include <Arduino.h>
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#include <esp32-hal-log.h>
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#include <libb64/cencode.h>
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#include "WiFiServer.h"
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#include "WiFiClient.h"
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#include "WebServer.h"
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#include "FS.h"
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#include "detail/RequestHandlersImpl.h"
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#include "mbedtls/md5.h"
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static const char AUTHORIZATION_HEADER[] = "Authorization";
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static const char qop_auth[] = "qop=\"auth\"";
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static const char WWW_Authenticate[] = "WWW-Authenticate";
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static const char Content_Length[] = "Content-Length";
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WebServer::WebServer(IPAddress addr, int port)
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: _corsEnabled(false)
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, _server(addr, port)
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, _currentMethod(HTTP_ANY)
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, _currentVersion(0)
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, _currentStatus(HC_NONE)
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, _statusChange(0)
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, _nullDelay(true)
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, _currentHandler(nullptr)
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, _firstHandler(nullptr)
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, _lastHandler(nullptr)
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, _currentArgCount(0)
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, _currentArgs(nullptr)
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, _postArgsLen(0)
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, _postArgs(nullptr)
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, _headerKeysCount(0)
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, _currentHeaders(nullptr)
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, _contentLength(0)
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, _chunked(false)
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{
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}
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WebServer::WebServer(int port)
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: _corsEnabled(false)
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, _server(port)
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, _currentMethod(HTTP_ANY)
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, _currentVersion(0)
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, _currentStatus(HC_NONE)
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, _statusChange(0)
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, _nullDelay(true)
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, _currentHandler(nullptr)
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, _firstHandler(nullptr)
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, _lastHandler(nullptr)
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, _currentArgCount(0)
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, _currentArgs(nullptr)
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, _postArgsLen(0)
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, _postArgs(nullptr)
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, _headerKeysCount(0)
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, _currentHeaders(nullptr)
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, _contentLength(0)
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, _chunked(false)
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{
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}
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WebServer::~WebServer() {
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_server.close();
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if (_currentHeaders)
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delete[]_currentHeaders;
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RequestHandler* handler = _firstHandler;
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while (handler) {
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RequestHandler* next = handler->next();
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delete handler;
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handler = next;
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}
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}
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void WebServer::begin() {
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close();
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_server.begin();
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_server.setNoDelay(true);
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}
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void WebServer::begin(uint16_t port) {
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close();
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_server.begin(port);
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_server.setNoDelay(true);
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}
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String WebServer::_extractParam(String& authReq,const String& param,const char delimit){
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int _begin = authReq.indexOf(param);
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if (_begin == -1)
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return "";
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return authReq.substring(_begin+param.length(),authReq.indexOf(delimit,_begin+param.length()));
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}
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static String md5str(String &in){
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char out[33] = {0};
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mbedtls_md5_context _ctx;
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uint8_t i;
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uint8_t * _buf = (uint8_t*)malloc(16);
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if(_buf == NULL)
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return String(out);
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memset(_buf, 0x00, 16);
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mbedtls_md5_init(&_ctx);
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mbedtls_md5_starts(&_ctx);
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mbedtls_md5_update(&_ctx, (const uint8_t *)in.c_str(), in.length());
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mbedtls_md5_finish(&_ctx, _buf);
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for(i = 0; i < 16; i++) {
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sprintf(out + (i * 2), "%02x", _buf[i]);
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}
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out[32] = 0;
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free(_buf);
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return String(out);
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}
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bool WebServer::authenticate(const char * username, const char * password){
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if(hasHeader(FPSTR(AUTHORIZATION_HEADER))) {
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String authReq = header(FPSTR(AUTHORIZATION_HEADER));
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if(authReq.startsWith(F("Basic"))){
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authReq = authReq.substring(6);
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authReq.trim();
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char toencodeLen = strlen(username)+strlen(password)+1;
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char *toencode = new char[toencodeLen + 1];
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if(toencode == NULL){
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authReq = "";
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return false;
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}
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char *encoded = new char[base64_encode_expected_len(toencodeLen)+1];
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if(encoded == NULL){
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authReq = "";
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delete[] toencode;
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return false;
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}
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sprintf(toencode, "%s:%s", username, password);
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if(base64_encode_chars(toencode, toencodeLen, encoded) > 0 && authReq.equalsConstantTime(encoded)) {
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authReq = "";
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delete[] toencode;
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delete[] encoded;
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return true;
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}
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delete[] toencode;
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delete[] encoded;
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} else if(authReq.startsWith(F("Digest"))) {
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authReq = authReq.substring(7);
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log_v("%s", authReq.c_str());
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String _username = _extractParam(authReq,F("username=\""),'\"');
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if(!_username.length() || _username != String(username)) {
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authReq = "";
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return false;
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}
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// extracting required parameters for RFC 2069 simpler Digest
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String _realm = _extractParam(authReq, F("realm=\""),'\"');
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String _nonce = _extractParam(authReq, F("nonce=\""),'\"');
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String _uri = _extractParam(authReq, F("uri=\""),'\"');
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String _response = _extractParam(authReq, F("response=\""),'\"');
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String _opaque = _extractParam(authReq, F("opaque=\""),'\"');
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if((!_realm.length()) || (!_nonce.length()) || (!_uri.length()) || (!_response.length()) || (!_opaque.length())) {
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authReq = "";
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return false;
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}
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if((_opaque != _sopaque) || (_nonce != _snonce) || (_realm != _srealm)) {
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authReq = "";
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return false;
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}
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// parameters for the RFC 2617 newer Digest
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String _nc,_cnonce;
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if(authReq.indexOf(FPSTR(qop_auth)) != -1) {
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_nc = _extractParam(authReq, F("nc="), ',');
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_cnonce = _extractParam(authReq, F("cnonce=\""),'\"');
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}
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String _H1 = md5str(String(username) + ':' + _realm + ':' + String(password));
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log_v("Hash of user:realm:pass=%s", _H1.c_str());
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String _H2 = "";
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if(_currentMethod == HTTP_GET){
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_H2 = md5str(String(F("GET:")) + _uri);
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}else if(_currentMethod == HTTP_POST){
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_H2 = md5str(String(F("POST:")) + _uri);
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}else if(_currentMethod == HTTP_PUT){
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_H2 = md5str(String(F("PUT:")) + _uri);
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}else if(_currentMethod == HTTP_DELETE){
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_H2 = md5str(String(F("DELETE:")) + _uri);
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}else{
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_H2 = md5str(String(F("GET:")) + _uri);
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}
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log_v("Hash of GET:uri=%s", _H2.c_str());
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String _responsecheck = "";
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if(authReq.indexOf(FPSTR(qop_auth)) != -1) {
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_responsecheck = md5str(_H1 + ':' + _nonce + ':' + _nc + ':' + _cnonce + F(":auth:") + _H2);
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} else {
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_responsecheck = md5str(_H1 + ':' + _nonce + ':' + _H2);
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}
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log_v("The Proper response=%s", _responsecheck.c_str());
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if(_response == _responsecheck){
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authReq = "";
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return true;
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}
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}
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authReq = "";
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}
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return false;
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}
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String WebServer::_getRandomHexString() {
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char buffer[33]; // buffer to hold 32 Hex Digit + /0
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int i;
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for(i = 0; i < 4; i++) {
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sprintf (buffer + (i*8), "%08x", esp_random());
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}
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return String(buffer);
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}
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void WebServer::requestAuthentication(HTTPAuthMethod mode, const char* realm, const String& authFailMsg) {
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if(realm == NULL) {
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_srealm = String(F("Login Required"));
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} else {
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_srealm = String(realm);
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}
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if(mode == BASIC_AUTH) {
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sendHeader(String(FPSTR(WWW_Authenticate)), String(F("Basic realm=\"")) + _srealm + String(F("\"")));
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} else {
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_snonce=_getRandomHexString();
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_sopaque=_getRandomHexString();
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sendHeader(String(FPSTR(WWW_Authenticate)), String(F("Digest realm=\"")) +_srealm + String(F("\", qop=\"auth\", nonce=\"")) + _snonce + String(F("\", opaque=\"")) + _sopaque + String(F("\"")));
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}
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using namespace mime;
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send(401, String(FPSTR(mimeTable[html].mimeType)), authFailMsg);
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}
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void WebServer::on(const Uri &uri, WebServer::THandlerFunction handler) {
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on(uri, HTTP_ANY, handler);
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}
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void WebServer::on(const Uri &uri, HTTPMethod method, WebServer::THandlerFunction fn) {
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on(uri, method, fn, _fileUploadHandler);
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}
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void WebServer::on(const Uri &uri, HTTPMethod method, WebServer::THandlerFunction fn, WebServer::THandlerFunction ufn) {
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_addRequestHandler(new FunctionRequestHandler(fn, ufn, uri, method));
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}
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void WebServer::addHandler(RequestHandler* handler) {
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_addRequestHandler(handler);
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}
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void WebServer::_addRequestHandler(RequestHandler* handler) {
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if (!_lastHandler) {
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_firstHandler = handler;
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_lastHandler = handler;
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}
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else {
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_lastHandler->next(handler);
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_lastHandler = handler;
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}
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}
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void WebServer::serveStatic(const char* uri, FS& fs, const char* path, const char* cache_header) {
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_addRequestHandler(new StaticRequestHandler(fs, path, uri, cache_header));
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}
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void WebServer::handleClient() {
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if (_currentStatus == HC_NONE) {
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WiFiClient client = _server.available();
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if (!client) {
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if (_nullDelay) {
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delay(1);
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}
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return;
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}
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log_v("New client");
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_currentClient = client;
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_currentStatus = HC_WAIT_READ;
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_statusChange = millis();
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}
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bool keepCurrentClient = false;
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bool callYield = false;
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if (_currentClient.connected()) {
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switch (_currentStatus) {
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case HC_NONE:
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// No-op to avoid C++ compiler warning
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break;
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case HC_WAIT_READ:
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// Wait for data from client to become available
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if (_currentClient.available()) {
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if (_parseRequest(_currentClient)) {
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// because HTTP_MAX_SEND_WAIT is expressed in milliseconds,
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// it must be divided by 1000
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_currentClient.setTimeout(HTTP_MAX_SEND_WAIT / 1000);
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_contentLength = CONTENT_LENGTH_NOT_SET;
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_handleRequest();
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if (_currentClient.connected()) {
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_currentStatus = HC_WAIT_CLOSE;
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_statusChange = millis();
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keepCurrentClient = true;
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}
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}
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} else { // !_currentClient.available()
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if (millis() - _statusChange <= HTTP_MAX_DATA_WAIT) {
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keepCurrentClient = true;
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}
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callYield = true;
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}
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break;
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case HC_WAIT_CLOSE:
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// Wait for client to close the connection
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if (millis() - _statusChange <= HTTP_MAX_CLOSE_WAIT) {
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keepCurrentClient = true;
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callYield = true;
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}
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}
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}
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if (!keepCurrentClient) {
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_currentClient = WiFiClient();
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_currentStatus = HC_NONE;
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_currentUpload.reset();
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}
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if (callYield) {
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yield();
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}
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}
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void WebServer::close() {
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_server.close();
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_currentStatus = HC_NONE;
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if(!_headerKeysCount)
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collectHeaders(0, 0);
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}
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void WebServer::stop() {
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close();
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}
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void WebServer::sendHeader(const String& name, const String& value, bool first) {
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String headerLine = name;
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headerLine += F(": ");
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headerLine += value;
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headerLine += "\r\n";
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if (first) {
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_responseHeaders = headerLine + _responseHeaders;
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}
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else {
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_responseHeaders += headerLine;
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}
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}
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void WebServer::setContentLength(const size_t contentLength) {
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_contentLength = contentLength;
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}
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void WebServer::enableDelay(boolean value) {
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_nullDelay = value;
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}
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void WebServer::enableCORS(boolean value) {
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_corsEnabled = value;
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}
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void WebServer::enableCrossOrigin(boolean value) {
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enableCORS(value);
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}
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void WebServer::_prepareHeader(String& response, int code, const char* content_type, size_t contentLength) {
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response = String(F("HTTP/1.")) + String(_currentVersion) + ' ';
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response += String(code);
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response += ' ';
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response += _responseCodeToString(code);
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response += "\r\n";
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using namespace mime;
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if (!content_type)
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content_type = mimeTable[html].mimeType;
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sendHeader(String(F("Content-Type")), String(FPSTR(content_type)), true);
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if (_contentLength == CONTENT_LENGTH_NOT_SET) {
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sendHeader(String(FPSTR(Content_Length)), String(contentLength));
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} else if (_contentLength != CONTENT_LENGTH_UNKNOWN) {
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sendHeader(String(FPSTR(Content_Length)), String(_contentLength));
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} else if(_contentLength == CONTENT_LENGTH_UNKNOWN && _currentVersion){ //HTTP/1.1 or above client
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//let's do chunked
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_chunked = true;
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sendHeader(String(F("Accept-Ranges")),String(F("none")));
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sendHeader(String(F("Transfer-Encoding")),String(F("chunked")));
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}
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if (_corsEnabled) {
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sendHeader(String(FPSTR("Access-Control-Allow-Origin")), String("*"));
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}
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sendHeader(String(F("Connection")), String(F("close")));
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response += _responseHeaders;
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response += "\r\n";
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_responseHeaders = "";
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}
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void WebServer::send(int code, const char* content_type, const String& content) {
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String header;
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// Can we asume the following?
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//if(code == 200 && content.length() == 0 && _contentLength == CONTENT_LENGTH_NOT_SET)
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// _contentLength = CONTENT_LENGTH_UNKNOWN;
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_prepareHeader(header, code, content_type, content.length());
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_currentClientWrite(header.c_str(), header.length());
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if(content.length())
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sendContent(content);
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}
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void WebServer::send_P(int code, PGM_P content_type, PGM_P content) {
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size_t contentLength = 0;
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if (content != NULL) {
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contentLength = strlen_P(content);
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}
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String header;
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char type[64];
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memccpy_P((void*)type, (PGM_VOID_P)content_type, 0, sizeof(type));
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_prepareHeader(header, code, (const char* )type, contentLength);
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_currentClientWrite(header.c_str(), header.length());
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sendContent_P(content);
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}
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void WebServer::send_P(int code, PGM_P content_type, PGM_P content, size_t contentLength) {
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String header;
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char type[64];
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memccpy_P((void*)type, (PGM_VOID_P)content_type, 0, sizeof(type));
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_prepareHeader(header, code, (const char* )type, contentLength);
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sendContent(header);
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sendContent_P(content, contentLength);
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}
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void WebServer::send(int code, char* content_type, const String& content) {
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send(code, (const char*)content_type, content);
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}
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void WebServer::send(int code, const String& content_type, const String& content) {
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send(code, (const char*)content_type.c_str(), content);
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}
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void WebServer::sendContent(const String& content) {
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sendContent(content.c_str(), content.length());
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}
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void WebServer::sendContent(const char* content, size_t contentLength) {
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const char * footer = "\r\n";
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if(_chunked) {
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char * chunkSize = (char *)malloc(11);
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if(chunkSize){
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sprintf(chunkSize, "%x%s", contentLength, footer);
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_currentClientWrite(chunkSize, strlen(chunkSize));
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free(chunkSize);
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}
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}
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_currentClientWrite(content, contentLength);
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if(_chunked){
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_currentClient.write(footer, 2);
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if (contentLength == 0) {
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_chunked = false;
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}
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}
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}
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void WebServer::sendContent_P(PGM_P content) {
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sendContent_P(content, strlen_P(content));
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}
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void WebServer::sendContent_P(PGM_P content, size_t size) {
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const char * footer = "\r\n";
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if(_chunked) {
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char * chunkSize = (char *)malloc(11);
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if(chunkSize){
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sprintf(chunkSize, "%x%s", size, footer);
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_currentClientWrite(chunkSize, strlen(chunkSize));
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free(chunkSize);
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}
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}
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_currentClientWrite_P(content, size);
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if(_chunked){
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_currentClient.write(footer, 2);
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|
if (size == 0) {
|
|
_chunked = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void WebServer::_streamFileCore(const size_t fileSize, const String & fileName, const String & contentType)
|
|
{
|
|
using namespace mime;
|
|
setContentLength(fileSize);
|
|
if (fileName.endsWith(String(FPSTR(mimeTable[gz].endsWith))) &&
|
|
contentType != String(FPSTR(mimeTable[gz].mimeType)) &&
|
|
contentType != String(FPSTR(mimeTable[none].mimeType))) {
|
|
sendHeader(F("Content-Encoding"), F("gzip"));
|
|
}
|
|
send(200, contentType, "");
|
|
}
|
|
|
|
String WebServer::pathArg(unsigned int i) {
|
|
if (_currentHandler != nullptr)
|
|
return _currentHandler->pathArg(i);
|
|
return "";
|
|
}
|
|
|
|
String WebServer::arg(String name) {
|
|
for (int j = 0; j < _postArgsLen; ++j) {
|
|
if ( _postArgs[j].key == name )
|
|
return _postArgs[j].value;
|
|
}
|
|
for (int i = 0; i < _currentArgCount; ++i) {
|
|
if ( _currentArgs[i].key == name )
|
|
return _currentArgs[i].value;
|
|
}
|
|
return "";
|
|
}
|
|
|
|
String WebServer::arg(int i) {
|
|
if (i < _currentArgCount)
|
|
return _currentArgs[i].value;
|
|
return "";
|
|
}
|
|
|
|
String WebServer::argName(int i) {
|
|
if (i < _currentArgCount)
|
|
return _currentArgs[i].key;
|
|
return "";
|
|
}
|
|
|
|
int WebServer::args() {
|
|
return _currentArgCount;
|
|
}
|
|
|
|
bool WebServer::hasArg(String name) {
|
|
for (int j = 0; j < _postArgsLen; ++j) {
|
|
if (_postArgs[j].key == name)
|
|
return true;
|
|
}
|
|
for (int i = 0; i < _currentArgCount; ++i) {
|
|
if (_currentArgs[i].key == name)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
String WebServer::header(String name) {
|
|
for (int i = 0; i < _headerKeysCount; ++i) {
|
|
if (_currentHeaders[i].key.equalsIgnoreCase(name))
|
|
return _currentHeaders[i].value;
|
|
}
|
|
return "";
|
|
}
|
|
|
|
void WebServer::collectHeaders(const char* headerKeys[], const size_t headerKeysCount) {
|
|
_headerKeysCount = headerKeysCount + 1;
|
|
if (_currentHeaders)
|
|
delete[]_currentHeaders;
|
|
_currentHeaders = new RequestArgument[_headerKeysCount];
|
|
_currentHeaders[0].key = FPSTR(AUTHORIZATION_HEADER);
|
|
for (int i = 1; i < _headerKeysCount; i++){
|
|
_currentHeaders[i].key = headerKeys[i-1];
|
|
}
|
|
}
|
|
|
|
String WebServer::header(int i) {
|
|
if (i < _headerKeysCount)
|
|
return _currentHeaders[i].value;
|
|
return "";
|
|
}
|
|
|
|
String WebServer::headerName(int i) {
|
|
if (i < _headerKeysCount)
|
|
return _currentHeaders[i].key;
|
|
return "";
|
|
}
|
|
|
|
int WebServer::headers() {
|
|
return _headerKeysCount;
|
|
}
|
|
|
|
bool WebServer::hasHeader(String name) {
|
|
for (int i = 0; i < _headerKeysCount; ++i) {
|
|
if ((_currentHeaders[i].key.equalsIgnoreCase(name)) && (_currentHeaders[i].value.length() > 0))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
String WebServer::hostHeader() {
|
|
return _hostHeader;
|
|
}
|
|
|
|
void WebServer::onFileUpload(THandlerFunction fn) {
|
|
_fileUploadHandler = fn;
|
|
}
|
|
|
|
void WebServer::onNotFound(THandlerFunction fn) {
|
|
_notFoundHandler = fn;
|
|
}
|
|
|
|
void WebServer::_handleRequest() {
|
|
bool handled = false;
|
|
if (!_currentHandler){
|
|
log_e("request handler not found");
|
|
}
|
|
else {
|
|
handled = _currentHandler->handle(*this, _currentMethod, _currentUri);
|
|
if (!handled) {
|
|
log_e("request handler failed to handle request");
|
|
}
|
|
}
|
|
if (!handled && _notFoundHandler) {
|
|
_notFoundHandler();
|
|
handled = true;
|
|
}
|
|
if (!handled) {
|
|
using namespace mime;
|
|
send(404, String(FPSTR(mimeTable[html].mimeType)), String(F("Not found: ")) + _currentUri);
|
|
handled = true;
|
|
}
|
|
if (handled) {
|
|
_finalizeResponse();
|
|
}
|
|
_currentUri = "";
|
|
}
|
|
|
|
|
|
void WebServer::_finalizeResponse() {
|
|
if (_chunked) {
|
|
sendContent("");
|
|
}
|
|
}
|
|
|
|
String WebServer::_responseCodeToString(int code) {
|
|
switch (code) {
|
|
case 100: return F("Continue");
|
|
case 101: return F("Switching Protocols");
|
|
case 200: return F("OK");
|
|
case 201: return F("Created");
|
|
case 202: return F("Accepted");
|
|
case 203: return F("Non-Authoritative Information");
|
|
case 204: return F("No Content");
|
|
case 205: return F("Reset Content");
|
|
case 206: return F("Partial Content");
|
|
case 300: return F("Multiple Choices");
|
|
case 301: return F("Moved Permanently");
|
|
case 302: return F("Found");
|
|
case 303: return F("See Other");
|
|
case 304: return F("Not Modified");
|
|
case 305: return F("Use Proxy");
|
|
case 307: return F("Temporary Redirect");
|
|
case 400: return F("Bad Request");
|
|
case 401: return F("Unauthorized");
|
|
case 402: return F("Payment Required");
|
|
case 403: return F("Forbidden");
|
|
case 404: return F("Not Found");
|
|
case 405: return F("Method Not Allowed");
|
|
case 406: return F("Not Acceptable");
|
|
case 407: return F("Proxy Authentication Required");
|
|
case 408: return F("Request Time-out");
|
|
case 409: return F("Conflict");
|
|
case 410: return F("Gone");
|
|
case 411: return F("Length Required");
|
|
case 412: return F("Precondition Failed");
|
|
case 413: return F("Request Entity Too Large");
|
|
case 414: return F("Request-URI Too Large");
|
|
case 415: return F("Unsupported Media Type");
|
|
case 416: return F("Requested range not satisfiable");
|
|
case 417: return F("Expectation Failed");
|
|
case 500: return F("Internal Server Error");
|
|
case 501: return F("Not Implemented");
|
|
case 502: return F("Bad Gateway");
|
|
case 503: return F("Service Unavailable");
|
|
case 504: return F("Gateway Time-out");
|
|
case 505: return F("HTTP Version not supported");
|
|
default: return F("");
|
|
}
|
|
}
|