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Dependencies:   ESP8266_WebServer mbed

Fork of WiFiLamp by Sebastian Schocke

ESP8266_WebServer/ESP8266_WebServer.cpp@9:319aeb6e0123, 2014-12-27 (annotated)

Committer:
sschocke
Date:
Sat Dec 27 05:56:47 2014 +0000
Revision:
9:319aeb6e0123
Parent:
7:f15c81074400
Child:
11:3ab606a42227
Updated ESP8266 Web Server to handle multiple requests better, and to automatically analyze and populate GET parameters

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sschocke 5:42c6f9d916bc 1 #include "ESP8266_WebServer.h"
sschocke 7:f15c81074400 2 #include <string>
sschocke 9:319aeb6e0123 3 #include <map>
sschocke 7:f15c81074400 4
sschocke 7:f15c81074400 5 ESP8266_WebServer::ESP8266_WebServer(Serial *espUART) {
sschocke 7:f15c81074400 6 serial = espUART;
sschocke 7:f15c81074400 7 rxptr = buffer;
sschocke 7:f15c81074400 8 debugSerial = NULL;
sschocke 7:f15c81074400 9 }
sschocke 7:f15c81074400 10
sschocke 7:f15c81074400 11 void ESP8266_WebServer::rxint(void) {
sschocke 7:f15c81074400 12 char c = serial->getc();
sschocke 7:f15c81074400 13 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 14 debugSerial->putc(c);
sschocke 7:f15c81074400 15 }
sschocke 7:f15c81074400 16 *rxptr = c;
sschocke 7:f15c81074400 17 rxptr++;
sschocke 7:f15c81074400 18 *rxptr = 0;
sschocke 7:f15c81074400 19 }
sschocke 7:f15c81074400 20
sschocke 7:f15c81074400 21 void ESP8266_WebServer::readBuffer(void) {
sschocke 7:f15c81074400 22 strncpy(reply, buffer, 1024);
sschocke 7:f15c81074400 23 rxptr = buffer;
sschocke 7:f15c81074400 24 *rxptr = 0;
sschocke 7:f15c81074400 25 }
sschocke 7:f15c81074400 26
sschocke 7:f15c81074400 27 short ESP8266_WebServer::data_waiting(void)
sschocke 7:f15c81074400 28 {
sschocke 7:f15c81074400 29 char* ok = strstr(buffer, "OK\r\n");
sschocke 7:f15c81074400 30 char* error = strstr(buffer, "ERROR\r\n");
sschocke 7:f15c81074400 31 char* nochange = strstr(buffer, "no change\r\n");
sschocke 7:f15c81074400 32
sschocke 7:f15c81074400 33 if( (ok != NULL) || (error != NULL ) || (nochange != NULL ) )
sschocke 7:f15c81074400 34 {
sschocke 7:f15c81074400 35 return 1;
sschocke 7:f15c81074400 36 }
sschocke 7:f15c81074400 37
sschocke 7:f15c81074400 38 return 0;
sschocke 7:f15c81074400 39 }
sschocke 7:f15c81074400 40
sschocke 7:f15c81074400 41 short ESP8266_WebServer::string_waiting(const char* str)
sschocke 7:f15c81074400 42 {
sschocke 7:f15c81074400 43 char* pr = strstr(buffer, str);
sschocke 7:f15c81074400 44 char* error = strstr(buffer, "ERROR\r\n");
sschocke 7:f15c81074400 45
sschocke 7:f15c81074400 46 if( (pr != NULL) || (error != NULL ) )
sschocke 7:f15c81074400 47 {
sschocke 7:f15c81074400 48 return 1;
sschocke 7:f15c81074400 49 }
sschocke 7:f15c81074400 50
sschocke 7:f15c81074400 51 return 0;
sschocke 7:f15c81074400 52 }
sschocke 5:42c6f9d916bc 53
sschocke 7:f15c81074400 54 void ESP8266_WebServer::Initialize(void) {
sschocke 7:f15c81074400 55 readBuffer();
sschocke 7:f15c81074400 56 while( string_waiting("\r\nready\r\n") == 0 ) {
sschocke 7:f15c81074400 57 wait_ms(10);
sschocke 7:f15c81074400 58 }
sschocke 7:f15c81074400 59 readBuffer();
sschocke 7:f15c81074400 60
sschocke 7:f15c81074400 61 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 62 debugSerial->printf("Done\r\nSetting operating mode...");
sschocke 7:f15c81074400 63 }
sschocke 7:f15c81074400 64 serial->printf("AT+CWMODE=3\r\n");
sschocke 7:f15c81074400 65 while( data_waiting() == 0 ) {
sschocke 7:f15c81074400 66 wait_ms(10);
sschocke 7:f15c81074400 67 }
sschocke 7:f15c81074400 68 readBuffer();
sschocke 7:f15c81074400 69
sschocke 7:f15c81074400 70 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 71 debugSerial->printf("Done\r\nAccept Multiple connections...");
sschocke 7:f15c81074400 72 }
sschocke 7:f15c81074400 73 serial->printf("AT+CIPMUX=1\r\n");
sschocke 7:f15c81074400 74 while( data_waiting() == 0 ) {
sschocke 7:f15c81074400 75 wait_ms(10);
sschocke 7:f15c81074400 76 }
sschocke 7:f15c81074400 77 readBuffer();
sschocke 7:f15c81074400 78
sschocke 7:f15c81074400 79 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 80 debugSerial->printf("Done\r\nStarting Web Server...");
sschocke 7:f15c81074400 81 }
sschocke 7:f15c81074400 82
sschocke 7:f15c81074400 83 serial->printf("AT+CIPSERVER=1,80\r\n");
sschocke 7:f15c81074400 84 while( data_waiting() == 0 ) {
sschocke 7:f15c81074400 85 wait_ms(10);
sschocke 7:f15c81074400 86 }
sschocke 7:f15c81074400 87 readBuffer();
sschocke 7:f15c81074400 88 }
sschocke 7:f15c81074400 89
sschocke 9:319aeb6e0123 90 ESP8266_WebRequest* ESP8266_WebServer::GetRequest(void)
sschocke 5:42c6f9d916bc 91 {
sschocke 7:f15c81074400 92 if( (string_waiting("+IPD") == 1) && (string_waiting("\r\nOK\r\n") == 1) ) {
sschocke 7:f15c81074400 93 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 94 debugSerial->printf("\r\nGot Data\r\n");
sschocke 7:f15c81074400 95 }
sschocke 7:f15c81074400 96 readBuffer();
sschocke 7:f15c81074400 97
sschocke 7:f15c81074400 98 char* ipdPacket = strstr(reply, "+IPD");
sschocke 9:319aeb6e0123 99 int bytesRecv, ipdLen, linkID;
sschocke 9:319aeb6e0123 100 int numMatched = sscanf(ipdPacket,"+IPD,%d,%d:%n", &linkID, &bytesRecv, &ipdLen);
sschocke 7:f15c81074400 101 if( numMatched != 2 ) {
sschocke 7:f15c81074400 102 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 103 debugSerial->printf("IPD ERROR : Matched %d, LinkID=%d, BytesRecv=%d, IPD Header Len=%d\r\n", numMatched, linkID, bytesRecv, ipdLen);
sschocke 7:f15c81074400 104 }
sschocke 7:f15c81074400 105 return false;
sschocke 7:f15c81074400 106 }
sschocke 7:f15c81074400 107
sschocke 7:f15c81074400 108 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 109 debugSerial->printf("IPD Data: LinkID=%d, BytesRecv=%d, IPD Header Len=%d\r\n", linkID, bytesRecv, ipdLen);
sschocke 7:f15c81074400 110 }
sschocke 7:f15c81074400 111 if( strstr(ipdPacket, "HTTP") != NULL ) {
sschocke 7:f15c81074400 112 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 113 debugSerial->printf("Got HTTP Request\r\n");
sschocke 7:f15c81074400 114 }
sschocke 7:f15c81074400 115 char* httpPacket = ipdPacket + ipdLen;
sschocke 7:f15c81074400 116 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 117 debugSerial->printf("HTTP Packet: %s\r\n", httpPacket);
sschocke 7:f15c81074400 118 }
sschocke 9:319aeb6e0123 119 ESP8266_WebRequest* request = new ESP8266_WebRequest(linkID, httpPacket, debugSerial);
sschocke 7:f15c81074400 120
sschocke 9:319aeb6e0123 121 return request;
sschocke 7:f15c81074400 122 }
sschocke 7:f15c81074400 123 }
sschocke 7:f15c81074400 124
sschocke 9:319aeb6e0123 125 return NULL;
sschocke 7:f15c81074400 126 }
sschocke 7:f15c81074400 127
sschocke 7:f15c81074400 128 void ESP8266_WebServer::sendResponse(int linkID) {
sschocke 7:f15c81074400 129 int bytes = strlen(response);
sschocke 7:f15c81074400 130 if( debugSerial != NULL ) {
sschocke 7:f15c81074400 131 debugSerial->printf("HTTP Reply Packet(%d bytes): %s\r\n", bytes, response);
sschocke 7:f15c81074400 132 }
sschocke 7:f15c81074400 133 serial->printf("AT+CIPSEND=%d,%d\r\n", linkID, bytes);
sschocke 7:f15c81074400 134 wait_ms(500);
sschocke 7:f15c81074400 135 if( (string_waiting("\r\n>") == 1) ) {
sschocke 7:f15c81074400 136 serial->printf(response);
sschocke 7:f15c81074400 137 }
sschocke 7:f15c81074400 138 while( string_waiting("\r\nSEND OK\r\n") == 0 ) {
sschocke 7:f15c81074400 139 wait_ms(10);
sschocke 7:f15c81074400 140 }
sschocke 7:f15c81074400 141 }
sschocke 7:f15c81074400 142
sschocke 7:f15c81074400 143 void ESP8266_WebServer::Send404Reply(int linkID) {
sschocke 7:f15c81074400 144 sprintf(response, "HTTP/1.1 404 Not Found\r\nContent-Type: text/html\r\nContent-Length: 13\r\n\r\n404 Not Found");
sschocke 7:f15c81074400 145 sendResponse(linkID);
sschocke 7:f15c81074400 146 }
sschocke 7:f15c81074400 147
sschocke 7:f15c81074400 148 void ESP8266_WebServer::SendHTMLReply(int linkID, std::string reply) {
sschocke 7:f15c81074400 149 sprintf(response, "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nContent-Length: %d\r\n\r\n%s", reply.length(), reply.c_str());
sschocke 7:f15c81074400 150 sendResponse(linkID);
sschocke 7:f15c81074400 151 }
sschocke 9:319aeb6e0123 152
sschocke 9:319aeb6e0123 153 ESP8266_WebRequest::ESP8266_WebRequest(int linkID, const char* httpPacket, Serial* debugSerial) {
sschocke 9:319aeb6e0123 154 int numMatched = sscanf(httpPacket, "%s %s HTTP/%*c.%*c", httpMethod, httpURI);
sschocke 9:319aeb6e0123 155 if( numMatched != 2 ) {
sschocke 9:319aeb6e0123 156 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 157 debugSerial->printf("HTTP ERROR : Matched %d, Method=%s, URI=%s\r\n", numMatched, httpMethod, httpURI);
sschocke 9:319aeb6e0123 158 }
sschocke 9:319aeb6e0123 159 return;
sschocke 9:319aeb6e0123 160 }
sschocke 9:319aeb6e0123 161 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 162 debugSerial->printf("HTTP %s %s\r\n", httpMethod, httpURI);
sschocke 9:319aeb6e0123 163 }
sschocke 9:319aeb6e0123 164
sschocke 9:319aeb6e0123 165 LinkID = linkID;
sschocke 9:319aeb6e0123 166 Method = httpMethod;
sschocke 9:319aeb6e0123 167 URI = httpURI;
sschocke 9:319aeb6e0123 168 int pos = URI.find('?');
sschocke 9:319aeb6e0123 169 if(pos != string::npos ) {
sschocke 9:319aeb6e0123 170 string params = URI.substr(pos+1);
sschocke 9:319aeb6e0123 171 URI = URI.substr(0,pos);
sschocke 9:319aeb6e0123 172 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 173 debugSerial->printf("HTTP %s %s\r\n", URI.c_str(), params.c_str());
sschocke 9:319aeb6e0123 174 }
sschocke 9:319aeb6e0123 175 pos = params.find('=');
sschocke 9:319aeb6e0123 176 while( pos != string::npos ) {
sschocke 9:319aeb6e0123 177 string name = params.substr(0,pos);
sschocke 9:319aeb6e0123 178 string value = params.substr(pos+1);
sschocke 9:319aeb6e0123 179 pos = params.find('&');
sschocke 9:319aeb6e0123 180 if( pos == string::npos )
sschocke 9:319aeb6e0123 181 {
sschocke 9:319aeb6e0123 182 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 183 debugSerial->printf("HTTP GET Parameter %s=%s\r\n", name.c_str(), value.c_str());
sschocke 9:319aeb6e0123 184 }
sschocke 9:319aeb6e0123 185 Parameters[name] = value;
sschocke 9:319aeb6e0123 186 break;
sschocke 9:319aeb6e0123 187 }
sschocke 9:319aeb6e0123 188
sschocke 9:319aeb6e0123 189 value = value.substr(0,value.find('&'));
sschocke 9:319aeb6e0123 190 params = params.substr(pos+1);
sschocke 9:319aeb6e0123 191 pos = params.find('=');
sschocke 9:319aeb6e0123 192 if( debugSerial != NULL ) {
sschocke 9:319aeb6e0123 193 debugSerial->printf("HTTP GET Parameter %s=%s\r\n", name.c_str(), value.c_str());
sschocke 9:319aeb6e0123 194 }
sschocke 9:319aeb6e0123 195 Parameters[name] = value;
sschocke 9:319aeb6e0123 196 }
sschocke 9:319aeb6e0123 197 }
sschocke 9:319aeb6e0123 198 }