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httpserver for Internet piano

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Handler/FsHandler.cpp@0:e59cc54df17c, 2015-06-29 (annotated)

Committer:
hjjeon
Date:
Mon Jun 29 09:03:40 2015 +0000
Revision:
0:e59cc54df17c
Child:
1:8291b3e9c064
httpServer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hjjeon 0:e59cc54df17c 1 /* FsHandler.cpp */
hjjeon 0:e59cc54df17c 2 #include "mbed.h"
hjjeon 0:e59cc54df17c 3 #include "FsHandler.h"
hjjeon 0:e59cc54df17c 4 //#define DEBUG
hjjeon 0:e59cc54df17c 5 #include "hl_debug.h"
hjjeon 0:e59cc54df17c 6
hjjeon 0:e59cc54df17c 7 DigitalOut led_red(LED1);
hjjeon 0:e59cc54df17c 8 DigitalOut led_green(LED2);
hjjeon 0:e59cc54df17c 9 DigitalOut led_blue(LED3);
hjjeon 0:e59cc54df17c 10
hjjeon 0:e59cc54df17c 11 DigitalIn din(PC_14);
hjjeon 0:e59cc54df17c 12
hjjeon 0:e59cc54df17c 13
hjjeon 0:e59cc54df17c 14 static int matchstrings(const char* one, const char* two)
hjjeon 0:e59cc54df17c 15 {
hjjeon 0:e59cc54df17c 16 int m = 0;
hjjeon 0:e59cc54df17c 17
hjjeon 0:e59cc54df17c 18 for (m = 0; m < min(strlen(one), strlen(two)) ; m++) {
hjjeon 0:e59cc54df17c 19 if (one[m] != two[m])
hjjeon 0:e59cc54df17c 20 return m;
hjjeon 0:e59cc54df17c 21 }
hjjeon 0:e59cc54df17c 22 return m;
hjjeon 0:e59cc54df17c 23 }
hjjeon 0:e59cc54df17c 24
hjjeon 0:e59cc54df17c 25 std::map<const char*, const char*> HTTPFsRequestHandler::m_fsMap;
hjjeon 0:e59cc54df17c 26
hjjeon 0:e59cc54df17c 27 HTTPFsRequestHandler::HTTPFsRequestHandler(const char* rootPath, const char* localPath, HTTPConnection::HTTPMessage& Msg, TCPSocketConnection& Tcp)
hjjeon 0:e59cc54df17c 28 : HTTPRequestHandler(Msg, Tcp)
hjjeon 0:e59cc54df17c 29 {
hjjeon 0:e59cc54df17c 30 m_rootPath = rootPath;
hjjeon 0:e59cc54df17c 31 m_localPath = localPath;
hjjeon 0:e59cc54df17c 32
hjjeon 0:e59cc54df17c 33 string myPath = m_rootPath + m_localPath;
hjjeon 0:e59cc54df17c 34
hjjeon 0:e59cc54df17c 35 // Now replace the virtual root path with a mounted device path
hjjeon 0:e59cc54df17c 36 std::map<const char*, const char*>::iterator it;
hjjeon 0:e59cc54df17c 37 const char *bestMatch = NULL;
hjjeon 0:e59cc54df17c 38 const char *bestMatchExchange = NULL;
hjjeon 0:e59cc54df17c 39 int match_ind = -1;
hjjeon 0:e59cc54df17c 40 for (it = m_fsMap.begin() ; it != m_fsMap.end() ; it++) {
hjjeon 0:e59cc54df17c 41 // find best match (if the given logical path is containted in the root
hjjeon 0:e59cc54df17c 42 int s = matchstrings(myPath.c_str(), it->second);
hjjeon 0:e59cc54df17c 43 INFO("Matching Root %s with handler %s results in %d identical characters\n", myPath.c_str(), it->second, s);
hjjeon 0:e59cc54df17c 44 if ((s == strlen(it->second)) && (s > match_ind)) {
hjjeon 0:e59cc54df17c 45 match_ind = s;
hjjeon 0:e59cc54df17c 46 bestMatch = it->first;
hjjeon 0:e59cc54df17c 47 bestMatchExchange = it->second;
hjjeon 0:e59cc54df17c 48 }
hjjeon 0:e59cc54df17c 49 }
hjjeon 0:e59cc54df17c 50
hjjeon 0:e59cc54df17c 51 if (bestMatch != NULL) {
hjjeon 0:e59cc54df17c 52 m_rootPath = bestMatch;
hjjeon 0:e59cc54df17c 53 m_localPath = string(myPath).substr(strlen(bestMatchExchange));
hjjeon 0:e59cc54df17c 54 }
hjjeon 0:e59cc54df17c 55
hjjeon 0:e59cc54df17c 56 handleRequest();
hjjeon 0:e59cc54df17c 57 }
hjjeon 0:e59cc54df17c 58
hjjeon 0:e59cc54df17c 59 HTTPFsRequestHandler::~HTTPFsRequestHandler()
hjjeon 0:e59cc54df17c 60 {
hjjeon 0:e59cc54df17c 61 }
hjjeon 0:e59cc54df17c 62
hjjeon 0:e59cc54df17c 63 int HTTPFsRequestHandler::handleGetRequest()
hjjeon 0:e59cc54df17c 64 {
hjjeon 0:e59cc54df17c 65 HTTPHeaders headers;
hjjeon 0:e59cc54df17c 66 int retval = 0; //success
hjjeon 0:e59cc54df17c 67 uint8_t pin_state;
hjjeon 0:e59cc54df17c 68
hjjeon 0:e59cc54df17c 69 if( std::string::npos != msg.uri.find("get_dio14.cgi") )
hjjeon 0:e59cc54df17c 70 {
hjjeon 0:e59cc54df17c 71 if(din)
hjjeon 0:e59cc54df17c 72 pin_state = 1;
hjjeon 0:e59cc54df17c 73 else
hjjeon 0:e59cc54df17c 74 pin_state = 0;
hjjeon 0:e59cc54df17c 75
hjjeon 0:e59cc54df17c 76 /*
hjjeon 0:e59cc54df17c 77 *len = sprintf((char *)buf, "DioCallback({\"dio_p\":\"14\",\
hjjeon 0:e59cc54df17c 78 \"dio_s\":\"%d\"\
hjjeon 0:e59cc54df17c 79 });",
hjjeon 0:e59cc54df17c 80 pin_state // Digital io status
hjjeon 0:e59cc54df17c 81 );
hjjeon 0:e59cc54df17c 82
hjjeon 0:e59cc54df17c 83
hjjeon 0:e59cc54df17c 84 Tcp.
hjjeon 0:e59cc54df17c 85 */
hjjeon 0:e59cc54df17c 86 }
hjjeon 0:e59cc54df17c 87 else //read html pages
hjjeon 0:e59cc54df17c 88 {
hjjeon 0:e59cc54df17c 89 if (m_localPath.length() > 4)
hjjeon 0:e59cc54df17c 90 getStandardHeaders(headers, m_localPath.substr(m_localPath.length()-4).c_str());
hjjeon 0:e59cc54df17c 91 else
hjjeon 0:e59cc54df17c 92 getStandardHeaders(headers);
hjjeon 0:e59cc54df17c 93
hjjeon 0:e59cc54df17c 94 INFO("Handling Get Request (root = %s, local = %s).", m_rootPath.c_str(), m_localPath.c_str());
hjjeon 0:e59cc54df17c 95
hjjeon 0:e59cc54df17c 96 std::string reqPath;
hjjeon 0:e59cc54df17c 97
hjjeon 0:e59cc54df17c 98 // Check if we received a directory with the local bath
hjjeon 0:e59cc54df17c 99 if ((m_localPath.length() == 0) || (m_localPath.substr( m_localPath.length()-1, 1) == "/")) {
hjjeon 0:e59cc54df17c 100 // yes, we shall append the default page name
hjjeon 0:e59cc54df17c 101 m_localPath += "index.html";
hjjeon 0:e59cc54df17c 102 }
hjjeon 0:e59cc54df17c 103
hjjeon 0:e59cc54df17c 104 reqPath = m_rootPath + m_localPath;
hjjeon 0:e59cc54df17c 105
hjjeon 0:e59cc54df17c 106 INFO("Mapping \"%s\" to \"%s\"", msg.uri.c_str(), reqPath.c_str());
hjjeon 0:e59cc54df17c 107
hjjeon 0:e59cc54df17c 108 FILE *fp = fopen(reqPath.c_str(), "r");
hjjeon 0:e59cc54df17c 109 if (fp != NULL) {
hjjeon 0:e59cc54df17c 110 char * pBuffer = NULL;
hjjeon 0:e59cc54df17c 111 int sz = 8192;
hjjeon 0:e59cc54df17c 112 while( pBuffer == NULL) {
hjjeon 0:e59cc54df17c 113 sz /= 2;
hjjeon 0:e59cc54df17c 114 pBuffer = (char*)malloc(sz);
hjjeon 0:e59cc54df17c 115 if (sz < 128)
hjjeon 0:e59cc54df17c 116 error ("OutOfMemory");
hjjeon 0:e59cc54df17c 117 }
hjjeon 0:e59cc54df17c 118
hjjeon 0:e59cc54df17c 119 // File was found and can be returned
hjjeon 0:e59cc54df17c 120
hjjeon 0:e59cc54df17c 121 // first determine the size
hjjeon 0:e59cc54df17c 122 fseek(fp, 0, SEEK_END);
hjjeon 0:e59cc54df17c 123 long size = ftell(fp);
hjjeon 0:e59cc54df17c 124 fseek(fp, 0, SEEK_SET);
hjjeon 0:e59cc54df17c 125
hjjeon 0:e59cc54df17c 126 startResponse(200, size);
hjjeon 0:e59cc54df17c 127 while(!feof(fp) && !ferror(fp)) {
hjjeon 0:e59cc54df17c 128 int cnt = fread(pBuffer, 1, sz , fp);
hjjeon 0:e59cc54df17c 129 if (cnt < 0)
hjjeon 0:e59cc54df17c 130 cnt = 0;
hjjeon 0:e59cc54df17c 131 processResponse(cnt, pBuffer);
hjjeon 0:e59cc54df17c 132 }
hjjeon 0:e59cc54df17c 133 delete pBuffer;
hjjeon 0:e59cc54df17c 134 endResponse();
hjjeon 0:e59cc54df17c 135 fclose(fp);
hjjeon 0:e59cc54df17c 136 }
hjjeon 0:e59cc54df17c 137 else {
hjjeon 0:e59cc54df17c 138 retval = 404;
hjjeon 0:e59cc54df17c 139 ERR("Requested file was not found !");
hjjeon 0:e59cc54df17c 140 }
hjjeon 0:e59cc54df17c 141 }
hjjeon 0:e59cc54df17c 142
hjjeon 0:e59cc54df17c 143 return retval;
hjjeon 0:e59cc54df17c 144 }
hjjeon 0:e59cc54df17c 145
hjjeon 0:e59cc54df17c 146 int HTTPFsRequestHandler::handlePostRequest()
hjjeon 0:e59cc54df17c 147 {
hjjeon 0:e59cc54df17c 148
hjjeon 0:e59cc54df17c 149 int pin = 0;
hjjeon 0:e59cc54df17c 150
hjjeon 0:e59cc54df17c 151 if( std::string::npos != msg.uri.find("set_dio.cgi") )
hjjeon 0:e59cc54df17c 152 {
hjjeon 0:e59cc54df17c 153 pin = get_http_param_value("pin");
hjjeon 0:e59cc54df17c 154 if(pin == 8)
hjjeon 0:e59cc54df17c 155 {
hjjeon 0:e59cc54df17c 156 led_red = get_http_param_value("val");
hjjeon 0:e59cc54df17c 157 }
hjjeon 0:e59cc54df17c 158 else if(pin == 9)
hjjeon 0:e59cc54df17c 159 {
hjjeon 0:e59cc54df17c 160 led_green = get_http_param_value("val");
hjjeon 0:e59cc54df17c 161 }
hjjeon 0:e59cc54df17c 162 else if(pin == 5)
hjjeon 0:e59cc54df17c 163 {
hjjeon 0:e59cc54df17c 164 led_blue = get_http_param_value("val");
hjjeon 0:e59cc54df17c 165 }
hjjeon 0:e59cc54df17c 166 else
hjjeon 0:e59cc54df17c 167 {
hjjeon 0:e59cc54df17c 168 WARN("Wrong pin number");
hjjeon 0:e59cc54df17c 169 }
hjjeon 0:e59cc54df17c 170
hjjeon 0:e59cc54df17c 171 return 0;
hjjeon 0:e59cc54df17c 172 }
hjjeon 0:e59cc54df17c 173 else
hjjeon 0:e59cc54df17c 174 {
hjjeon 0:e59cc54df17c 175 return 404;
hjjeon 0:e59cc54df17c 176 }
hjjeon 0:e59cc54df17c 177 }
hjjeon 0:e59cc54df17c 178
hjjeon 0:e59cc54df17c 179 int HTTPFsRequestHandler::handlePutRequest()
hjjeon 0:e59cc54df17c 180 {
hjjeon 0:e59cc54df17c 181 return 404;
hjjeon 0:e59cc54df17c 182 }
hjjeon 0:e59cc54df17c 183
hjjeon 0:e59cc54df17c 184 uint32_t HTTPFsRequestHandler::get_http_param_value(char* param_name)
hjjeon 0:e59cc54df17c 185 {
hjjeon 0:e59cc54df17c 186 uint8_t * name = 0;
hjjeon 0:e59cc54df17c 187 uint8_t * pos2;
hjjeon 0:e59cc54df17c 188 uint16_t len = 0;
hjjeon 0:e59cc54df17c 189 char value[10];
hjjeon 0:e59cc54df17c 190 uint32_t ret = 0;
hjjeon 0:e59cc54df17c 191
hjjeon 0:e59cc54df17c 192 //msg.attri
hjjeon 0:e59cc54df17c 193 if((name = (uint8_t *)strstr(msg.attri, param_name)))
hjjeon 0:e59cc54df17c 194 {
hjjeon 0:e59cc54df17c 195 name += strlen(param_name) + 1;
hjjeon 0:e59cc54df17c 196 pos2 = (uint8_t*)strstr((char*)name, "&");
hjjeon 0:e59cc54df17c 197 if(!pos2)
hjjeon 0:e59cc54df17c 198 {
hjjeon 0:e59cc54df17c 199 pos2 = name + strlen((char*)name);
hjjeon 0:e59cc54df17c 200 }
hjjeon 0:e59cc54df17c 201 len = pos2 - name;
hjjeon 0:e59cc54df17c 202
hjjeon 0:e59cc54df17c 203 if(len)
hjjeon 0:e59cc54df17c 204 {
hjjeon 0:e59cc54df17c 205 strncpy(value, (char*)name, len);
hjjeon 0:e59cc54df17c 206 ret = atoi(value);
hjjeon 0:e59cc54df17c 207 }
hjjeon 0:e59cc54df17c 208 }
hjjeon 0:e59cc54df17c 209 return ret;
hjjeon 0:e59cc54df17c 210 }
hjjeon 0:e59cc54df17c 211